10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

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FORM 10-K

____________________________________

(Mark One)

x Annual report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the fiscal year ended January 27, 2013

or

o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the transition period from             to             

Commission File Number 1-6395

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SEMTECH CORPORATION

(Exact name of registrant as specified in its charter)

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Delaware	95-2119684
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

200 Flynn Road, Camarillo, California, 93012-8790

(Address of principal executive offices, Zip Code)

Registrant’s telephone number, including area code: (805) 498-2111

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Name of each exchange on which registered
Common Stock par value $.01 per share	The NASDAQ Stock Market LLC

Securities registered pursuant to Section 12(g) of the Act:

None

(Title of Class)

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Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes  x    No  ¨

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange Act.    Yes  ¨    No  x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	x	Accelerated filer	o
Non-accelerated filer	o   (Do not check if a smaller reporting company)	Smaller reporting company	o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act):    Yes  o    No  x

The aggregate market value of the common stock held by non-affiliates of the registrant (based upon the closing sale price of $24.39 on the NASDAQ Global Select Market) as of July 27, 2012 was approximately $1.37 billion. Stock held by directors, officers and shareholders owning 5% or more of the outstanding common stock (as reported by shareholders on Schedules 13D and 13G) were excluded as they may be deemed affiliates. This determination of affiliate status is not a conclusive determination for any other purpose.

Number of shares of Common Stock, $0.01 par value per share, outstanding at March 22, 2013: 67,090,054

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DOCUMENTS INCORPORATED BY REFERENCE

Portions of the following documents are incorporated by reference in Part III, Item numbers 11, 12, 13 and 14 and portions of Item 10 of this report to: Definitive Proxy Statement in connection with registrant’s annual meeting of shareholders to be held on June 20, 2013, to be filed no later than 120 days after the end of the registrant’s fiscal year ended January 27, 2013.

SEMTECH CORPORATION

INDEX TO FORM 10-K

FOR THE YEAR ENDED JANUARY 27, 2013

PART I
Item 1	Business	3
Item 1A	Risk Factors	12
Item 1B	Unresolved Staff Comments	23
Item 2	Properties	24
Item 3	Legal Proceedings	24
Item 4	Mine Safety Disclosure	24
PART II
Item 5	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	25
Item 6	Selected Financial Data	25
Item 7	Management’s Discussion and Analysis of Financial Condition and Results of Operations	27
Item 7A	Quantitative and Qualitative Disclosures About Market Risk	39
Item 8	Financial Statements and Supplementary Data	41
Item 9	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	83
Item 9A	Controls and Procedures	83
Item 9B	Other Information	84
PART III
Item 10	Directors, Executive Officers and Corporate Governance	84
Item 11	Executive Compensation	85
Item 12	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	85
Item 13	Certain Relationships and Related Transactions, and Director Independence	85
Item 14	Principal Accounting Fees and Services	85
PART IV
Item 15	Exhibits, Financial Statement Schedules	86
	Signatures	92

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Special Note Regarding Forward Looking and Cautionary Statements

This Annual Report on Form 10-K (the “Form 10-K”) contains “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). We may also make forward-looking statements in other reports filed with the Securities and Exchange Commission (“SEC”), in materials delivered to shareholders and in press releases. In addition, Company representatives may make oral forward-looking statements from time to time. Forward-looking statements are statements other than historical information or statements of current condition and relate to matters such as our future financial performance, future operational performance, and our plans, objectives and expectations. Some forward-looking statements may be identified by use of terms such as “expects,” “anticipates,” “intends,” “estimates,” “believes,” “projects,” “should,” “will,” “plans” and similar words.

Forward-looking statements should be considered in conjunction with the cautionary statements contained in Item 1A “Risk Factors” and elsewhere in this Form 10-K, in our other filings with the SEC, and in material incorporated herein and therein by reference. In light of the risks and uncertainties inherent in all such projected matters, forward-looking statements should not be regarded as a representation by the Company or any other person that our objectives or plans will be achieved or that any of our operating expectations or financial forecasts will be realized. Financial results could differ materially from those projected in forward-looking statements due to known or unknown risks. We assume no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

In addition to regarding forward-looking statements with caution, you should consider that the preparation of the consolidated financial statements requires us to draw conclusions and make interpretations, judgments, assumptions and estimates with respect to certain factual, legal, and accounting matters. Our financial statements might have been materially impacted if we had reached different conclusions or made different interpretations, judgments, assumptions or estimates.

PART I

Item 1.        Business

General

Unless the context otherwise requires, the use of the terms “Semtech,” “the Company,” “we,” “us” and “our” in this Annual Report on Form 10-K refers to Semtech Corporation and, as applicable, its consolidated subsidiaries. We are a leading supplier of analog and mixed-signal semiconductor products and were incorporated in Delaware in 1960. We design, develop and market a wide range of products for commercial applications, the majority of which are sold into the enterprise computing, communications, high-end consumer and industrial end-markets.

Enterprise Computing: datacenters, passive optical networks, optical receiver and transceiver, desktops, notebooks, servers, graphic boards, monitors, printers and other computer peripherals.

Communications: base stations, backplane, optical networks, carrier networks, switches and routers, cable modems, signal conditioners, wireless LAN and other communication infrastructure equipment.

High-End Consumer: handheld products, set-top boxes, digital televisions, tablet computers, digital video recorders, thunderbolt and fiberless high-speed interfaces and other consumer equipment.

Industrial: broadcast studio equipment, automated meter reading, military and aerospace, medical, security systems, automotive, industrial and home automation, video security and surveillance and other industrial equipment.

Our end-customers are primarily original equipment manufacturers and their suppliers, including Alcatel-Lucent, Cisco Systems, Inc., Huawei Technologies Co., Ltd., LG Electronics, Motorola, Nokia Siemens Networks, Itron, Apple, Phonak International, Research In Motion Limited, Samsung Electronics Co., and ZTE Corporation.

Overview of the Semiconductor Industry

The semiconductor industry is broadly divided into analog and digital semiconductor products. Analog semiconductors condition and regulate “real world” functions such as temperature, speed, sound and electrical current. Digital semiconductors process binary information, such as that used by computers. Mixed-signal devices incorporate both analog and digital functions into a single chip and provide the ability for digital electronics to interface with the outside world.

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The market for analog and mixed-signal semiconductors differs from the market for digital semiconductors. The analog and mixed-signal industry is typically characterized by longer product life cycles than the digital industry. In addition, analog semiconductor manufacturers tend to have lower capital investment requirements for manufacturing because their facilities tend to be less dependent than digital producers on state-of-the-art production equipment to manufacture leading edge process technologies. The end-product markets for analog and mixed-signal semiconductors are more varied and more specialized than the relatively standardized digital semiconductor product markets.

Another difference between the analog and digital markets is the amount of available talented labor. The analog industry relies more heavily than the digital industry on design and applications talent to distinguish its products from one another. Digital expertise is extensively taught in universities due to its overall market size, while analog and mixed-signal expertise tends to be learned over time based on experience and hands-on training. Consequently, personnel with analog training are scarcer than digital trained engineers. This has historically made it more difficult for new suppliers to quickly develop products and gain significant market share.

Advancements in digital processing technology typically drive the need for corresponding advancements in analog and mixed-signal solutions. We believe that the diversity of our applications allows us to take advantage of areas of relative market strength and reduces our vulnerability to competitive pressure in any one area.

Business Strategy

Our objective is to be a leading supplier of analog and mixed-signal semiconductor devices to the fastest growing areas of our target markets. We intend to leverage our pool of skilled technical personnel to develop new products, or, where appropriate, use acquisitions to either accelerate our position in the fastest growing areas or to gain entry into these areas. In order to capitalize on our strengths in analog and mixed-signal processing design, development and marketing, we intend to pursue the following strategies:

Leverage our rare analog design expertise

We have developed a strategy to invest heavily in human resources needed to define, design and market high-performance analog platform products. We have built a team of experienced engineers who combine industry expertise with advanced semiconductor design expertise to meet customer requirements and enable our customers to get their products to market rapidly. We intend to leverage this strategy to achieve new levels of integration, power reduction and performance, enabling our customers to achieve differentiation in their end systems.

Continue to release proprietary new products, achieve new design wins, and cross-sell products

We are focused on developing unique, new, proprietary products that bring value to our target customers in our target markets. These products typically are differentiated in performance but are priced competitively. We also focus on achieving design wins for our products with current and future customers. Design wins are indications by the customer that they intend to incorporate our products into their new designs. Our technical talent works closely with our customers in securing design wins, defining new products and in implementing and integrating our products into their systems. We also focus on selling our complete portfolio of products to our existing customers, as we believe the technical expertise of our marketing and sales team allows us to identify and capitalize on cross-selling opportunities.

Focus on fast-growing market segments and regions

We have chosen to target the analog segments of some of the fastest growing end-markets. We participate in these markets by focusing on specific product areas within the analog and mixed-signal market, including products for handheld equipment, high-end consumer equipment, and communications infrastructure and certain broad-based industrial markets. All of these markets are characterized by their need for leading-edge, high-performance analog and mixed-signal semiconductor technologies.

The enterprise computing, communications, high-end consumer and industrial end markets we supply are characterized by several trends that we believe drive demand for our products. The key trends that we target include:

• Increasing bandwidth over high-speed networks, fueling growth in high speed voice, video and data transmission

• Increasing electronic system requirements for smaller, lighter, highly integrated and feature rich devices

• Increasing need for more efficient energy management in the home and in industrial environments and the proliferation of ”green” standards

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Our products address these market trends by providing solutions that are ultra-low power thus extending battery life, small form factor enabling smaller devices, highly integrated enabling more functionality within devices and high performance enabling product differentiation within our customer base. Additionally, as communications functions are increasingly integrated into a range of systems and devices, these products require analog sensing, processing and control capabilities, which increases the number and size of our end-markets. Finally, industrial, medical, high-end consumer and other end-market applications have increasingly incorporated data processing and communications features into their end systems resulting in more complex power and protection requirements, which in turn, has broadened the opportunities for selling our power and protection devices.

We believe that certain geographic markets, such as Asia and North America represent opportunities for added sales and end-customer diversity. Accordingly, we have bolstered our efforts in these regions to enhance our ability to expand our customer base.

Leverage outsourced semiconductor fabrication capacity

We outsource most of our manufacturing in order to focus more of our resources on defining, developing and marketing our products. Our primary outside wafer foundries are based in China, Israel, the United States, Europe and Taiwan. Our largest wafer source is a foundry based in China. We believe that outsourcing provides us numerous benefits, including capital efficiency, the flexibility to adopt and leverage emerging process technologies without significant investment risk and a more variable cost of goods, which provides us with greater operating flexibility.

Products and Technology

We design, develop, manufacture and market high-performance analog and mixed signal semiconductor products. We operate and account for results in one reportable segment.

On March 20, 2012, we acquired, through our wholly-owned subsidiary Semtech Canada Inc., all outstanding equity interests of Gennum Corporation (“Gennum”) (TSX: GND), a leading supplier of high speed analog and mixed-signal semiconductors for the optical communications and video broadcast markets.

Our primary reasons for the acquisition were to broaden our existing portfolio of high-speed communications platforms through Gennum’s data communications and video platforms by combining Gennum’s 1 Gbps to 25 Gbps signal integrity solutions with our 40 Gbps to 100 Gbps SerDes solutions to create one of the industry’s most complete and robust analog and mixed signal portfolios. In addition, Gennum’s strong position in video broadcast and the emerging HD video surveillance market further diversifies our portfolio of high-performance analog semiconductors and provides cross-selling potential with the combined customer base.

On March 7, 2012, we completed the acquisition of Cycleo SAS (“Cycleo”), a privately held company based in France that develops intellectual property (“IP”) for wireless long-range semiconductor products used in smart metering and other industrial and consumer markets. This transaction, which was accounted for using the acquisition method of accounting, complements our current wireless offerings and will bring customers a set of high-end, digitally enhanced wireless solutions.

Our product lines include:

Protection Products. We design, develop and market high performance protection devices, which are often referred to as transient voltage suppressors (“TVS”). TVS devices provide protection for electronic systems where voltage spikes (called transients), such as electrostatic discharge or secondary lightning surge energy that can permanently damage voltage sensitive complementary metal–oxide–semiconductor (“CMOS”) integrated circuits (“ICs”). Our portfolio includes filter and termination devices that are integrated in with the transient voltage suppressor (“TVS”) devices. Our protection products feature low capacitance, providing robust protection while preserving signal integrity in high-speed networking and video interfaces. These products also operate at very low voltage needed for today’s low voltage ICs. Our protection products can be found in a broad range of applications including smart phones, LCD TVs, set-top boxes, tablet computers, notebooks, base stations, routers, and industrial instruments.

Advanced Communications Products. We design, develop and market a portfolio of proprietary advanced wired communication, ultra-high speed Serializer/Deserializer (“SerDes”) and modulator driver products for transport communication. These ICs perform transmission and amplification functions used in high-speed networks, at 40Gbps and 100Gbps. Our advanced communications products also feature a leading integrated timing solution for packet based communication networks. Our advanced communications products are used in a variety of communications and industrial applications.

Gennum Products. We design, develop and market a portfolio of optical communications, broadcast video, active cable transceiver and backplane products used in a wide variety of enterprise computing, industrial, communications and high-end

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consumer applications. Our broadcast video products offer advanced solutions for next generation video formats, ever increasing data rates and evolving I/O and distance requirements. Our security and surveillance products for HDcctv enable upgrade of analog cctv installations to full digital HD, leveraging the installed base of cabling, and our fully integrated transmit and receive products enable the highest performance, longest reach HDcctv standards-compliant designs. Our comprehensive portfolio of IC’s for optical transceivers, backplane applications and consumer high-speed interfaces ranges from 100Mbps to 100Gbps and supports key industry standards such as Fibre Channel, Infiniband, Ethernet, PON, SONET and PCI Express.

Power Management and High-Reliability Products. Power management products control, alter, regulate and condition the power supplies within electronic systems. The highest volume product types within the power management product line are switching voltage regulators, combination switching and linear regulators, smart regulators and charge pumps. Our power management products feature highly integrated devices for the telecom industry and low-power, small form factor and high-efficiency products for mobile phones, notebook computers, computer peripherals and other portable devices. The primary application for these products is power regulation for computer, communications, high-end consumer and industrial systems. Our high-reliability discrete semiconductor products comprised of rectifiers, assemblies (packaged discrete rectifiers) and other products are typically used to convert alternating currents (“AC”) into direct currents (“DC”) and to protect circuits against very high voltage spikes or high current surges. Our high-reliability products can be found in a broad range of applications including industrial, military, medical, aerospace and defense systems, including satellite communications.

Wireless and Sensing Products. We design, develop and market a portfolio of specialized radio frequency (“RF”) functions used in a wide variety of industrial, medical and networking applications, and specialized sensing functions used in industrial and consumer applications. Our wireless and sensing products feature industry leading and longest range industrial, scientific and medical (“ISM”) radio, enabling low cost of ownership and increased reliability in all environments. Our unique sensing interface platforms can interface to any sensor and output digital data in any form. Our wireless and sensing products can be found in a broad range of applications in the industrial, medical and consumer markets.

Semtech End-Markets

Our products are sold to customers in the enterprise computing, communications, high-end consumer, and industrial end-markets. Our estimates of sales by major end-markets are detailed below:

	Fiscal Years
(percentage of net sales)	2013		2012		2011
Enterprise Computing	15	%	9	%	9	%
Communications	31	%	39	%	37	%
High-End Consumer	29	%	35	%	33	%
Industrial and Other	25	%	17	%	21	%
Total	100	%	100	%	100	%

We believe that our diversity in end-markets provides stability to our business and opportunity for growth.

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The following table depicts our main product lines and their end-market and product applications:

Semtech’s	Specific End-Product Applications
Main Product Lines	Enterprise Computing	Communications	High-End Consumer	Industrial / Other
Protection	Desktop PC/Notebooks, Ultrabooks	3G/4G Base stations, 10/100/10000 Routers/Switches	Smartphones, tablets, cameras, TVs, settop boxes	Measurement & instrumentation devices, Automobile
Advanced Communications	Data centers	40G/100G ULH/LH line cards, Optical Modules, 4G LTE wireless base stations	—	Military, aerospace
Power Management and High-Reliability	Servers, workstations, notebook computers, add-on cards, computer gaming systems, printers, copiers	Network cards, routers and hubs, telecom network boards	Smartphones, tablets, cameras, TVs, settop boxes	Power supplies, industrial systems, military, aerospace, medical
Wireless and Sensing	—	—	Smartphones, media players, tablets, LCD TVs, digital/still video cameras	Automated meter readers, industrial automation, home security, keyless entry hearing aids
Gennum	Servers, data centers, storage networks, cloud computing, fiber to the home	Backplane, LAN and WAN routers and switches	Thunderbolt cables	Video broadcast, video surveillance, ultrasound imaging

Seasonality

Historically, our results have reflected some seasonality, with demand levels generally being slightly higher in the computer and high-end consumer products segments during the third and fourth quarters of our fiscal year in comparison to the first and second quarters.

Intellectual Capital and Product Development

The design of intellectual property (“IP”) and the resulting development of proprietary products is a critical success factor for us. The recruiting and retaining of key technical talent is the foundation for designing, developing and selling this IP, in the form of new proprietary products, in the global marketplace. One of our strategies to recruit this talent is the establishment of multiple design center locations. As a result, we have design centers throughout the world.

Circuit design engineers, layout engineers, product and test engineers, application engineers and field application engineers are our most valuable employees. Together they perform the critical tasks of designing and laying out integrated circuits, turning these circuits into silicon devices, and conferring with customers about designing these devices into their applications. The majority of our engineers fit into one of these categories. Most of these engineers have many years of experience in the design, development and layout of circuits targeted for use in protection, advanced communications, power management and high-reliability, multimedia and data communications, and wireless and sensing applications. We also employ a number of software engineers and systems engineers that specialize in the development of software and systems architecture, who enable us to develop systems oriented products in select markets.

In fiscal year 2013, we incurred $120.0 million of product development and engineering expense. This represents 21% of net sales. Product development and engineering costs were $80.6 million or 17% of net sales and $69.6 million or 15% of net sales in fiscal years 2012 and 2011, respectively. We intend to make further investments in research and development in the future, which may include increasing our employee headcount and investing in design and development equipment.

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Sales and Marketing

Sales made directly to customers during fiscal year 2013 were approximately 61% of net sales. The remaining 39% of net sales were made through independent distributors. We have direct sales personnel located throughout the United States, Europe and Asia who manage the sales activities of independent sales representative firms and independent distributors. We expense our advertising costs as they are incurred.

We operate internationally through our wholly owned Swiss and Canadian subsidiaries, Semtech International AG and Semtech Canada Corporation. Semtech International AG serves the European markets from its headquarters in Wil, Switzerland and through its wholly owned subsidiaries based in France, Germany, Neuchatel – Switzerland, the United Kingdom, China and Malaysia. Semtech International AG maintains branch offices, either directly or through one of its wholly owned subsidiaries, in Taiwan, Korea and Japan. Semtech International AG also maintains representative offices in China. Semtech Canada Corporation serves the North American market for GPG products from its headquarters in Burlington, Ontario. Semtech Canada Corporation also serves the European and Japanese markets for GPG products through its wholly owned subsidiaries in the United Kingdom and Japan. Semtech Canada Corporation also maintains research and development facilities in Mexico and India. Independent representatives and distributors are also used to serve customers throughout the world. Some of our distributors and sales representatives also offer products from our competitors, as is customary in the industry.

Customers, Sales Data and Backlog

As a result of the breadth of our products and markets, we have a broad range of customers.

Representative Customers by End-Markets:

Enterprise Computing	Communications	High-End Consumer	Industrial
Hewlett-Packard	Cisco	LG Electronics	General Atomics
Lenovo	Alcatel-Lucent	Motorola	Honeywell
Quanta	Huawei	Quanta	Itron
Samsung	Nokia Siemens	Research in Motion	Phonak
LuxNet	Ericsson	Samsung	Raytheon
Apple	Samsung	Sony Ericsson	Nokia Siemens
	ZTE	Sumitomo Electric

Our customers include major original equipment manufacturers (“OEMs”) and their subcontractors in the enterprise computing, communications, high-end consumer and industrial end-markets. Our products are typically purchased by these customers for our performance, price, or technical support, as compared to our competitors.

During fiscal years 2013, 2012 and 2011, U.S. sales contributed 17%, 20% and 23%, respectively to our net sales. Foreign sales constituted 83%, 80% and 77% of our net sales during fiscal years 2013, 2012 and 2011, respectively. A majority of foreign sales were to customers located in the Asia-Pacific region, with sales to customers located in South Korea, Japan, and China (including Hong Kong) comprising 7%, 10%, and 35% of our net sales, respectively, in fiscal year 2013. No other foreign country comprised more than 7% of net sales in fiscal year 2013. See Note 16 to our consolidated financial statements included in Item 8 of this report for additional financial information by geographic region.

A summary of net sales by region follows.

Sales by Region

	Fiscal Years
(in thousands, except percentages)	2013				2012				2011
North America	$	98,401	17	%	$	114,552	24	%	$	112,404	25	%
Asia-Pacific	405,179		70	%	298,477		62	%	272,079		60	%
Europe	75,247		13	%	67,572		14	%	70,019		15	%
Total Net Sales	$	578,827	100	%	$	480,601	100	%	$	454,502	100	%

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The following table sets forth the concentration of net sales and accounts receivable among the customers that accounted for more than 10% of our net sales in one of the fiscal years 2013, 2012 and 2011:

Concentration of Net Sales - Significant Customers

	Fiscal Years
(percentage of net sales)	2013		2012		2011
Samsung Electronics (and affiliates)	12	%	13	%	12	%
Huawei Technologies (and affiliates)	10	%	7	%	8	%
Frontek Technology Corp	6	%	10	%	11	%

Concentration of Accounts Receivable - Significant Customers

	Fiscal Years
(percentage of net accounts receivable as of fiscal year end)	2013		2012
Samsung Electronics (and affiliates)	12	%	14	%
Frontek Technology Corp	4	%	10	%
Dragon Technology	3	%	11	%
Huawei Technologies (and affiliates)	14	%	11	%

For fiscal year 2013, end-market concentration for our significant customers was as follows:

(percentage of net sales)	Samsung Electronics (and affiliates)			Huawei Technologies Co (and affiliates)
Enterprise Computing	1	%		—	%
Communications	—	%		11	%
High-End Consumer	11	%	(1)	—	%
Industrial and Other	—	%		—	%
	12	%		11	%

(1) For Samsung Electronics, approximately 54% of the sales into the High-end Consumer end-market relate to products focused on the handheld market, which includes cell phones.

Our backlog of orders as of the end of fiscal years 2013, 2012 and 2011 was approximately $113.8 million, $75.6 million and $112.3 million, respectively. The majority of our backlog is typically requested for delivery within six months. In markets where the end system life cycles are relatively short, customers typically request delivery in four to eight weeks. A backlog analysis at any given time gives little indication of our future business except on a short-term basis, principally within the next 45 days. We do not have any significant contracts with our customers calling for shipments over a period of more than 18 months.

Manufacturing Capabilities

Our strategy is to outsource the majority of our manufacturing functions to third-party foundries and assembly and test contractors. The third-party foundries fabricate silicon wafers and the assembly and test contractors package and test our products. We believe this outsourcing permits us to take advantage of the best available technology, leverage the capital investment of others, and reduce our operating costs associated with manufacturing assets.

We perform a limited amount of internal probe and final test activities at our facilities in Camarillo, Irvine, Redondo Beach and San Diego, California; Neuchatel, Switzerland; and Reynosa, Mexico. These activities accommodate situations in which tight coupling with product design is desirable or where there are unique requirements. Our packaged discrete rectifier products are packaged and tested in-house in Reynosa, Mexico. Almost all of our other products are packaged and tested by outside subcontractors.

In keeping with our mostly “fabless” business model, we have no wafer fabrication facilities except for our operation in Reynosa, Mexico. For fiscal year 2013, the Reynosa facility provided almost all of the silicon for our packaged discrete rectifier products, which were approximately 3% of our end product sales. The remaining 97% of our end products were

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supported with finished silicon wafers purchased from outside wafer foundries in China, Taiwan, the United States, Canada, Europe and Israel. We anticipate that more than 90% of all silicon wafers we require will come from outside foundries in fiscal year 2014.

Despite our use of outside wafer foundries for sourcing a majority of our silicon needs, we do maintain internal process development capabilities. Our process engineers work closely with our outside foundries on the improvement and development of process capabilities. In fiscal year 2013, we purchased the vast majority of our wafers from approximately nine different third-party wafer foundries and used various manufacturing processes, including Bipolar, High-Speed Bipolar, Complementary Metal-Oxide-Semiconductor (“CMOS”), RF-CMOS, Bi-CMOS and SiGe processes.

While we do have some redundancy of fabrication processes by using multiple outside foundries, any interruption of supply by one or more of these foundries could materially impact us. As a result, we maintain some amount of business interruption insurance to help reduce the financial risk associated with a wafer supply interruption, but we are not fully insured against this risk.

Although our products are made from basic materials (principally silicon, metals and plastics), all of which are available from a number of suppliers, capacity at wafer foundries sometimes becomes constrained. The limited availability of certain materials, such as silicon wafer substrates, may impact our suppliers’ ability to meet our demand needs or impact the price we are charged. The prices of certain other basic materials, such as metals, gases and chemicals used in the production of circuits have all increased in recent years as demand has grown for these basic commodities. In most cases we do not procure these materials ourselves but we are nevertheless reliant on these materials for producing our products because our outside foundry and package and test subcontractors must procure them. To help minimize risks associated with constrained capacity, we use multiple foundries and have taken other steps to reserve capacity at certain foundries.

Our largest wafer source is a foundry in China. In fiscal year 2013, this Chinese foundry provided 38% of our total silicon requirements in terms of cost of wafers purchased. We have consigned certain equipment to this foundry to support our specialized processes run at the foundry and to ensure a specified level of capacity over the next few years. While the provision of these assets to the wafer foundry may be factored into certain pricing arrangements with the foundry, the impact of any pricing adjustments is insignificant and does not impact our margin trends.

Most of our ultra-high speed SerDes products and microwave and high-reliability products are dependent on a single fabrication facility, located within the United States, for wafers.

We use third-party subcontractors to perform almost all of our assembly and test operations. A majority of our assembly and test activity is conducted by third-party subcontractors based in Malaysia, the Philippines, Korea and China. We have operations offices located in the Philippines, Malaysia and China that support and coordinate some of the worldwide shipment of products. We have installed our own test equipment at some of our packaging and testing subcontractors in order to ensure a certain level of capacity, assuming the subcontractor has ample employees to operate the equipment.

Our arrangements with both outside wafer foundries and package and test subcontractors are designed to provide some assurance of capacity but are not expected to assure access to all the manufacturing capacity we may need in the future.

Competition

The analog and mixed-signal semiconductor industry is highly competitive, and we expect competitive pressures to continue. Our ability to compete effectively and to expand our business will depend on our ability to continue to recruit key engineering talent, our ability to execute on new product developments and our ability to persuade customers to design these new products into their applications. Our industry is characterized by decreasing unit selling prices over the life of a product as the volumes typically increase. However, price decreases can sometimes be quite rapid and faster than the rate of increase of the associated product volumes. We believe we compete effectively based upon our ability to capitalize on efficiencies and economies of scale in production and sales, and our ability to maintain or improve our productivity and product yields to reduce manufacturing costs.

We are in direct and active competition, with respect to one or more of our product lines, with numerous manufacturers of varying size, technical capability and financial strength. A number of these competitors are dependent on semiconductor products as their principal source of income, and some are much larger than we are. The number of competitors has grown due to expansion of the market segments in which we participate. We consider our primary competitors with respect to our protection products to include STMicroelectronics N.V., NXP Semiconductors N.V., ON Semiconductor Corporation, and Infineon Technologies AG. Our primary competitors with respect to our Advanced Communications products are Broadcom Corporation, AMCC, ClariPhy Communications, Inc., and our customer’s own internal solutions. With respect to our Power Management and High Reliability products, we consider our primary competitors to include Linear Technology Corporation,

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Maxim Integrated Products Inc., Microsemi Corporation, and Monolithic Power Systems Inc. Our primary competitors with respect to our Wireless and Sensing products include Silicon Laboratories, Texas Instruments Inc., Atmel Corporation, Analog Devices Inc., and Cypress Semiconductor Corporation. With respect to our Gennum Product Group, we consider our primary competitors to include Texas Instruments, Maxim Integrated, Inc., Mindspeed Technology Inc., and Inphi Corporation.

Intellectual Property and Licenses

We have been granted 153 U.S. patents and 43 foreign patents and have numerous patent applications pending with respect to our products and to technologies associated with our business. The expiration dates of issued patents range from 2013 to 2031. Although we consider patents to be helpful in maintaining a competitive advantage, we do not believe they create definitive competitive barriers to entry. There can be no assurance that our patent applications will lead to issued patents, that others will not develop or patent similar or superior products or technologies, or that our patents will not be challenged, invalidated, or circumvented by others.

We have registered many of our trademarks in the U.S. and in various foreign jurisdictions. Registration generally provides rights in addition to basic trademark protections and is typically renewable upon proof of continued use. We have registered, or are in the process of registering, our SEMTECH trademark in many jurisdictions. In one location use of this trademark is prohibited, but we are permitted to use our Semtech International trade name. This restriction has not had a material impact on our business to date and we do not anticipate it will have a material impact in the future.

We also have registered certain materials in which we have copyright ownership, which provides additional protection for this intellectual property.

Employees

As of January 27, 2013, we had 1,433 full-time employees. There were 529 employees in research and development, 250 in sales, marketing and field services, and 174 in general, administrative and finance. The remaining employees support operational activities, including product and test engineering, assembly, manufacturing, distribution and quality functions.

We have not had a work stoppage in at least the last decade and the only unionized employees are approximately 128 Mexican nationals who work at our manufacturing facility in Reynosa, Mexico. Our employee relations during the last fiscal year have been, and remain, satisfactory.

We adjust our workforce from time to time to meet the changing needs of our business. Competition for key design engineering talent globally is significant.

Government Regulations and Environmental Matters

We are required to comply, and it is our policy to comply, with numerous government regulations that are normal and customary to businesses in our industry and that operate in our markets and operating locations.

Our sales that serve the military and aerospace markets primarily consist of our Microwave and High-Reliability products that have been qualified to be sold in these markets by the U.S. Department of Defense (“DOD”). In order to maintain these qualifications, we must comply with certain specifications promulgated by the DOD. As part of maintaining these qualifications, we are routinely audited by the DOD. Based on current specifications, we believe we can maintain our qualifications for the foreseeable future. However, these specifications could be modified by the DOD in the future or we could become subject to other government requirements, which could make the manufacturing of these products more difficult and thus could adversely impact our profitability in the Power Management and High Reliability and Advanced Communications product lines. The U.S. State Department has determined that a small number of special assemblies from the Power Management and High Reliability and Advanced Communications product lines are subject to the International Traffic in Arms Regulations (“ITAR”). We have a Technical Assistance Agreement in place that permits us to assemble certain of these products in Mexico. Other products subject to ITAR regulations are manufactured in our Redondo Beach, CA facilities. International shipments of these products require a State Department license.

Our facilities throughout the world are subject to various environmental laws and regulations and we believe our operations are in substantial compliance with those laws and regulations. We have incurred, and may continue to incur, liabilities under various statutes for the cleanup of pollutants at locations we have operated and at third-party disposal and recycling sites we have used. During fiscal years 2012 and 2011, the expense incurred with respect to these clean up matters was not material. In fiscal year 2013, the Company has recorded $2.5 million environmental reserves associated with the November 2012 draft clean up and abatement order discussed below. New laws or regulations or changes to existing laws or regulations could subject our ongoing operations to different or additional environmental standards that could increase our cost of compliance in the

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future. In addition, our cost of doing business could increase if our suppliers increase prices to recoup the cost of their compliance with environmental laws or regulations. See Note 15 to our consolidated financial statements included in Item 8 of this report.

The Company has used an environmental firm, specializing in hydrogeology, to perform monitoring of the groundwater at the Company’s former facility in Newbury Park, California that was leased for approximately forty years. The Company vacated the building in May 2002. Certain contaminants have been found in the local groundwater and site soils. Groundwater monitoring results to date over a number of years indicate that groundwater contaminants are, in full or in material part, from adjacent facilities. Responsibility for soil contamination remains under investigation. The location of key soil contamination is concentrated in an area of an underground storage tank that the Company believes to have been installed and used in the early 1960s by a former tenant at the site who preceded the Company’s tenancy. There are no claims pending with respect to environmental matters at the Newbury Park site. The applicable regulatory agency having authority over the site issued joint instructions in November 2008, ordering the Company and the current owner of the site to perform additional assessments and surveys, and to create ongoing groundwater monitoring plans before any final regulatory action for “no further action” may be approved. In September 2009, the regulatory agency issued supplemental instructions to the Company and the current site owner regarding previously ordered site assessments, surveys and groundwater monitoring. Most recently, in November 2012, the regulatory agency added two more potentially responsible parties to the matter, based on historical evidence of past occupancy or operations at the site dating to the 1960s. In addition, the regulatory agency has issued draft cleanup and abatement orders to all the parties. Responses to the draft orders were submitted in a timely manner by all the parties in January 2013. The parties are expected to work cooperatively in responding to and determining the appropriate scope and extent of additional site investigative and categorization work, as well as in relation to any ultimate proposed clean up and abatement work.

The Company has accrued liabilities where it is probable that a loss will be incurred and the cost or amount of loss can be reasonably estimated. Based upon, and in anticipation of the likely outcome associated with the November 2012 draft cleanup and abatement order, the Company engaged an environmental firm to assist in an assessment of this site consistent with the direction of the draft order. Based on the Company’s preliminary assessment, it has determined a likely range of probable loss between $2.5 million and $5.7 million . Given the early nature of the draft clean up and abatement order and uncertainties associated with environmental assessment and the remediation activities, the Company is unable to determine a best estimate within the range of loss. Therefore, the Company recorded the minimum amount of $2.5 million in fiscal year 2013 under “Other long-term liabilities” on the consolidated balance sheets, and included in the consolidated statement of income under “Selling, general and administrative.” These estimates could change as a result of changes in planned remedial actions, further actions from the regulatory agency, remediation technology, and other factors.

Available Information

General information about us can be found on our website at www.semtech.com. The information on our website is for informational purposes only and should not be relied on for investment purposes. The information on our website is not incorporated by reference into this report and should not be considered part of this or any other report filed with the SEC.

We make available free of charge, either by direct access on our website or a link to the SEC website, our annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act, as soon as reasonably practicable after such reports are electronically filed with, or furnished to, the SEC. Our reports filed with, or furnished to, the SEC are also available directly at the SEC’s website at www.sec.gov.

Item 1A.    Risk Factors

You should carefully consider and evaluate all of the information in this report, including the risk factors listed below. The risks described below are not the only ones facing our company. Additional risks not now known to us or that we currently deem immaterial may also impair our business operations. If any of these risks actually occur, our business could be materially harmed. If our business is harmed, the trading price of our common stock could decline.

As discussed earlier in “Special Notes Regarding Forward Looking and Cautionary Statements,” this report contains forward-looking statements that involve risks and uncertainties. Our actual results could differ materially from those anticipated in these forward looking statements as a result of certain factors including the risks faced by us described below and elsewhere in this report, in our other filings with the SEC, and in material incorporated herein and therein by reference. We undertake no duty to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

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Risks Relating to General Business Conditions

Our future results may fluctuate, fail to match past performance or fail to meet expectations

Our results may fluctuate in the future, may fail to match our past performance or fail to meet the expectations of analysts and investors. Our results and related ratios, such as gross margin, operating income percentage and effective tax rate may fluctuate as a result of:

• general economic conditions in the countries where we sell our products;

• seasonality and variability in the computer market and our other end-markets;

• the timing of new product introductions by us and our competitors;

• product obsolescence;

• the scheduling, rescheduling or cancellation of orders by our customers;

• the cyclical nature of demand for our customers’ products;

• our ability to develop new process technologies and achieve volume production;

• our ability to integrate and realize synergies from recent acquisitions;

• changes in manufacturing yields;

• capacity utilization;

• product mix and pricing;

• movements in exchange rates, interest rates or tax rates;

• the availability of adequate supply commitments from our outside suppliers;

• the manufacturing and delivery capabilities of our subcontractors; and

• litigation and regulatory matters.

As a result of these factors, our past financial results are not necessarily indicative of our future results.

Downturns in the business cycle could adversely affect our revenues and profitability

The semiconductor industry is highly cyclical and has experienced significant downturns, which are characterized by reduced product demand, production overcapacity, increased levels of inventory, industry-wide fluctuations in the demand for semiconductors and the significant erosion of average selling prices. The cyclical nature of the semiconductor industry may cause us to experience substantial period-to-period fluctuations in our results of operations. The growth rate of the global economy is one of the factors affecting demand for semiconductor components. Many factors could adversely affect regional or global economic growth including increased price inflation for goods, services or materials, rising interest rates in the United States and the rest of the world, or tight credit markets. In addition, economic slowdowns may also affect our customers’ ability to pay for our products. Accordingly, economic slowdowns may harm our business.

Current global economic conditions could reduce demand for our products

Current global economic conditions pose a risk to the overall economy as consumers and businesses may continue to defer purchases in response to the uncertainty around tighter credit and negative financial news. These conditions could reduce demand for our products. Such demand could be different from our expectations due to many factors including changes in business and economic conditions, conditions in the credit market that affect consumer confidence, customer acceptance of our products, changes in customer order patterns, including order cancellations, and changes in the level of inventory held by vendors.

Business interruptions could harm our business

Our corporate headquarters, a portion of our assembly and research and development activities and certain other critical business operations are located near major earthquake fault lines. We do not maintain earthquake insurance and our business could be harmed in the event of a major earthquake. We generally do not maintain flood coverage, including for our Asian locations where certain of our operations support and sales offices are located. Such flood coverage has become very expensive; as a result the Company has elected not to purchase this coverage. If one of these locations were to experience a major flood, our business may be harmed.

Our business could be harmed if natural disasters interfere with production of wafers by our suppliers, assembly and testing of products by our subcontractors, or our distribution network. We maintain some business interruption insurance to help reduce

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the effect of such business interruptions, but we are not fully insured against such risks. Likewise, our business could be adversely impacted if a natural disaster were to shut down or significantly curtail production by one or more of our end customers. Any such loss of revenue due to a slowdown or cessation of end customer demand is uninsured.

When natural disasters such as an earthquake or other causes result in wide-spread destruction, the impact on our business may not be readily apparent. This is especially true when trying to assess the impact of the disaster on our end customers, who themselves may not fully understand the impact of the event on their business. The full extent and scope of natural disaster impacts, both in terms of direct impact on the Company and our supply chain, as well as on our end customers (to include their own supply chain issues as well as end market issues), may not be known for a considerable period of time following the disaster. When any such natural disaster occurs, there can be no assurance that our results of operations may not be materially affected as a result of the impact of the disaster on the Company or on our end customers.

We rely on third party freight firms for nearly all of our shipments from vendors to assembly and test sites, primarily in Asia, and for shipments of our final product to customers. This includes ground and air transportation. Any significant disruption of such freight business globally or in certain parts of the world, particularly where our operations are concentrated, could materially affect our ability to generate revenues. Business interruption insurance may not provide enough protection to compensate us for losses that may occur. Accordingly, any of these disruptions could significantly harm our business.

Terrorist attacks, wars and other acts of violence, such as those that may result from the tension in the Middle East and the Korean peninsula, or any other national or international crisis, calamity or emergency, may result in interruption to the business activities of many entities, business losses and overall disruption of the U.S. economy at many levels. These events may directly impact our physical facilities or those of our customers and suppliers. Additionally, these events or armed conflicts may cause some of our customers or potential customers to reduce the level of expenditures on their services and products that ultimately may reduce our revenue. The consequences of these reductions are unpredictable, and we may not be able to foresee events that could have an adverse effect on our business. For example, as a result of these events, insurance premiums for businesses may increase and the scope of coverage may be decreased. Consequently, we may not be able to obtain adequate insurance coverage for our business and properties. To the extent that these disruptions result in delays or cancellations of customer orders, a general decrease in corporate spending, or our inability to effectively market our services and products, our business and results of operations could be harmed.

We operate a manufacturing facility in Reynosa, Mexico. Historically, certain regions in Mexico have experienced high levels of violence. Any significant disruption of our operations at this facility could materially affect our ability to generate revenues for certain products within our High-Reliability product line. Some of the products that we produce at this facility require certification by the Defense Contract Audit Agency (“DCAA”). Failure to secure or maintain the required certification, either directly through the DCAA or through a qualifying third party would materially affect our authorization to manufacture applicable products at this facility, and our revenue for certain products within our High-Reliability product line could materially decline. An audit was performed in May 2012 by the Defense Logistic Agency (DLA) Land and Maritime office, which is the Department of Defense (DoD) agency having oversight responsibility for applicable products manufactured in this facility. The DLA has indicated that a letter of certification to allow the Company to continue producing High-Reliability products will be issued in March 2013. The applicable certification will list the Company on the DoD Qualified Parts List (QPL) as a MIL-PRF-19500 Semiconductor Manufacturer of JAN, JANTX, JANTXV and JANS quality level components. The certification cycle is every two years. Semtech has been continuously certified to produce QPL components for over 20 years without lapse.

A large percentage of our sales are to customers located in Asia and a large percentage of our products are manufactured in Asia. One of our largest customer bases in Asia is located in Taiwan. Our largest wafer source is located in China. An outbreak of SARS or other health related issues, such as an avian influenza (bird flu) pandemic, could have a negative impact on consumer demand, on travel needed to secure new business or manage our operations, on transportation of our products from our suppliers or to our customers, or on workers needed to sell or manufacture our products or our customers’ products.

Risks Relating to Production Operations

We obtain many essential components and materials and certain critical manufacturing services from a limited number of suppliers and subcontractors, most of which are foreign-based entities

Our reliance on a limited number of subcontractors and suppliers for wafers, packaging, testing and certain other processes involves several risks, including potential inability to obtain an adequate supply of required components and reduced control over the price, timely delivery, reliability and quality of components. These risks are attributable to several factors, including limitations on resources, labor problems, equipment failures or the occurrence of natural disasters. The good working relationships we have established with our suppliers and subcontractors could be disrupted, and our supply chain could suffer,

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if a supplier or subcontractor were to experience a change in control. There can be no assurance that problems will not occur in the future with suppliers or subcontractors. Disruption or termination of our supply sources or subcontractors could significantly delay our shipments and harm our business. Delays could also damage relationships with current and prospective customers. Any prolonged inability to obtain timely deliveries or quality manufacturing or any other circumstances that would require us to seek alternative sources of supply or to manufacture or package certain components internally could limit our growth and harm our business.

We are subject to risk from fluctuating market prices of certain commodity raw materials, particularly gold, that are incorporated into our end products or used by our suppliers to process our end products. Increased commodity prices are passed on to us in the form of higher prices from our suppliers, either in the form of general price increases or commodity surcharges. Although we generally deal with our suppliers on a purchase order basis rather than on a long-term contract basis, we generally attempt to obtain firm pricing for volumes consistent with planned production. Our gross margins may decline if we are not able to increase selling prices of our products or obtain manufacturing efficiencies to offset the increased cost. We do not enter into formal hedging arrangements to mitigate against commodity risk.

Most of our outside subcontractors and suppliers, including third-party foundries that supply silicon wafers, are located in foreign countries, including China, Taiwan, the United States, Canada, Europe and Israel. For fiscal year 2013, approximately 38% of our silicon in terms of cost of wafers, was supplied by a third-party foundry in China, and this percentage could be even higher in future periods. For fiscal years 2012 and 2011, approximately 59% and 49%, respectively, of our silicon in terms of cost of wafers was supplied by this third-party foundry in China. While our utilization of multiple outside foundries does create some redundancy of fabrication processes, any interruption of supply by one or more of these foundries could materially impact us. We maintain some amount of business interruption insurance to help reduce the risk of wafer supply interruption, but we are not fully insured against such risk.

A majority of our package and test operations are performed by third-party contractors based in Malaysia, Korea, the Philippines and China. Our international business activities, in general, are subject to a variety of potential risks resulting from political and economic uncertainties. Any political turmoil or trade restrictions in these countries, particularly China, could limit our ability to obtain goods and services from these suppliers and subcontractors. The effect of an economic crisis or political turmoil on our suppliers located in these countries may impact our ability to meet the demands of our customers. If we find it necessary to transition the goods and services received from our existing suppliers or subcontractors to other firms, we would likely experience an increase in production costs and a delay in production associated with such a transition, both of which could have a significant negative effect on our operating results, as these risks are substantially uninsured.

Our ultra-high speed SerDes products and most of our microwave products are dependent on a single fabrication facility, located within the United States, for wafers. Any extended or continued interruption of supply by this supplier facility could materially impact our ability to ship these products to customers. An extended or protracted failure by us to deliver products to customers in accordance with contractual delivery commitments could result in lost business opportunities and may in certain circumstances trigger contractual penalties or other contractual liabilities to customers, including stipulated delay fees and/or the cost differential of substitute products.

Our products may be found to be defective, product liability claims may be asserted against us and we may not have sufficient liability insurance

One or more of our products may be found to be defective after shipment, requiring a product replacement, recall, or a software solution that would cure the defect but impede performance of the product. We may also be subject to product returns in the ordinary course of our business which could impose substantial costs and harm our business. Beyond the potential direct cost associated with product failures, loss of confidence by major customers could cause sales of our other products to drop significantly.

Product liability claims may be asserted with respect to our technology or products. Our products are typically sold at prices that are significantly lower than the cost of the modules or end-products into which they are incorporated. A defect or failure in our product could give rise to failures in the module or the ultimate end-product, so we may face claims for damages that are disproportionately higher than the revenues and profits we receive from the products involved, especially if our customer seeks to recover for damage claims made against it by its own customers. While we maintain some insurance for such events, there can be no assurance that we have obtained a sufficient amount of insurance coverage, and that asserted claims will be within the scope of coverage of the insurance, or that we will have sufficient resources to satisfy any asserted claims not covered by insurance.

Our general warranty policy provides for repair or replacement of defective parts. In some cases, a refund of the purchase price is offered. In certain instances, we have agreed to other warranty terms, including some indemnification provisions, which could prove to be significantly more costly than repair, replacement or refund. If there is a substantial increase in the rate of

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customer claims, if our estimate of probable losses relating to identified warranty exposures prove inaccurate, or if our efforts to contractually limit liability prove inadequate, we may record a charge against future cost of sales.

Risks Relating to Research and Development, Engineering, Intellectual Property and New Technologies

We may be unsuccessful in developing and selling new products, which is central to our objective of maintaining and expanding our business

We operate in a dynamic environment characterized by price erosion, rapid technological change, and design and other technological obsolescence. Our competitiveness and future success depend on our ability to achieve design wins for our products with current and future customers and introduce new or improved products that meet customer needs while achieving favorable margins. A failure to achieve design wins, to introduce these new products in a timely manner, or to achieve market acceptance for these products could harm our business.

The introduction of new products presents significant business challenges because product development commitments and expenditures must be made well in advance of product sales. The success of a new product depends on accurate forecasts of long-term market demand and future technological developments, as well as on a variety of specific implementation factors, including:

• timely and efficient completion of process design and development;

• timely and efficient implementation of manufacturing and assembly processes;

• product performance;

• the quality and reliability of the product; and

• effective marketing, sales and service.

The failure of our products to achieve market acceptance due to these or other factors could harm our business.

We may be unable to adequately protect our intellectual property rights

We pursue patents for some of our new products and unique technologies, but we rely primarily on trade secret protections through a combination of nondisclosure agreements and other contractual provisions, as well as our employees’ commitment to confidentiality and loyalty, to protect our know-how and processes. We intend to continue protecting our proprietary technology, including through trademark and copyright registrations and patents. Despite this intention, we may not be successful in achieving adequate protection. Our failure to adequately protect our material know-how and processes could harm our business. There can be no assurance that the steps we take will be adequate to protect our proprietary rights, that our patent applications will lead to issued patents, that others will not develop or patent similar or superior products or technologies, or that our patents will not be challenged, invalidated, or circumvented by others. Furthermore, the laws of the countries in which our products are or may be developed, manufactured or sold may not protect our products and intellectual property rights to the same extent as laws in the United States.

The semiconductor industry is characterized by frequent claims of infringement and litigation regarding patent and other intellectual property rights. Due to the number of competitors, intellectual property infringement is an ongoing risk since other companies in our industry could have intellectual property rights that may not be identifiable when we initiate development efforts. Litigation may be necessary to enforce our intellectual property rights and we may have to defend ourselves against infringement claims. Any such litigation could be very costly and may divert our management’s resources. If one of our products is found to infringe on a third party’s rights, we may have liability for past infringement and may need to seek a license to use such intellectual property going forward. If a license is not available or if we are unable to obtain a license on terms acceptable to us, we would either have to change our product so that it does not infringe or stop making the product.

We must commit resources to product production prior to receipt of purchase commitments and could lose some or all of the associated investment

Sales are made primarily on a current delivery basis, pursuant to purchase orders that may be revised or cancelled by our customers without penalty, rather than pursuant to long-term contracts. Some contracts require that we maintain inventories of certain products at levels above the anticipated needs of our customers. As a result, we must commit resources to the production of products without binding purchase commitments from customers. Our inability to sell products after we devote significant resources to them could harm our business.

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Risks Relating to International Operations

We sell and trade with foreign customers, which subjects our business to increased risks

Sales to foreign customers accounted for approximately 83% of net sales in the fiscal year ended January 27, 2013. Sales to our customers located in China (including Hong Kong) and South Korea constituted 35% and 7%, respectively, of net sales for fiscal year 2013. International sales are subject to certain risks, including unexpected changes in regulatory requirements, tariffs and other barriers, political and economic instability, difficulties in accounts receivable collection, difficulties in managing distributors and representatives, difficulties in staffing and managing foreign subsidiary and branch operations and potentially adverse tax consequences. These factors may harm our business. Our use of the Semtech name may be prohibited or restricted in some countries, which may negatively impact our sales efforts. In addition, substantially all of our foreign sales are denominated in U.S. dollars and currency exchange fluctuations in countries where we do business could harm us by resulting in pricing that is not competitive with prices denominated in local currencies.

Our foreign currency exposures may change over time as the level of activity in foreign markets grows and could have an adverse impact upon financial results

As a global enterprise, we face exposure to adverse movements in foreign currency exchange rates. Certain of our assets, including certain bank accounts, exist in non-U.S. dollar-denominated currencies, which are sensitive to foreign currency exchange rate fluctuations. The non-U.S. dollar-denominated currencies are principally the Swiss Franc, Euro, Canadian dollars, Mexican Peso, Japanese Yen and British Pound Sterling. We also have a significant number of employees that are paid in foreign currency, the largest groups being United Kingdom-based employees who are paid in British Pound Sterling, Swiss-based employees who are paid in Swiss Francs, Canada-based employees who are paid in Canadian dollars, and Mexican nationals who are paid in Mexican Pesos.

If the value of the U.S. dollar weakens relative to these specific currencies, as it has done in recent years, the cost of doing business in terms of U.S. dollars rises. With the growth of our international business, our foreign currency exposures may grow and under certain circumstances, could harm our business.

As a means of managing our foreign exchange exposure, we routinely convert U.S. dollars into foreign currency in advance of the expected payment. The Company regularly assesses whether or not to hedge foreign exchange exposure. Any future use of forward contracts to hedge foreign exchange exposure may be required to be marked-to-market each quarter and can create volatility in net income not directly tied to our operating results.

We may be subject to increased tax liabilities and an increased effective tax rate if we need to repatriate funds held by our foreign subsidiaries

As of January 27, 2013, our foreign subsidiaries held approximately $180.2 million of cash, cash equivalents, and short-term investments and $383.7 million of unremitted earnings for which no Federal or State taxes have been provided. If we needed these funds for investment in our domestic operations, any repatriation, such as that which occurred in fiscal year 2010 to partially fund the acquisition of Sierra Monolithics, Inc. (“SMI”), could result in increased tax liabilities.

We are subject to export restrictions and laws affecting trade and investments

As a global company headquartered in the United States, we are subject to U.S. laws and regulations that limit and restrict the export of some of our products. Compliance with these laws has not significantly limited our operations or our sales in the recent past, but could significantly limit them in the future. We maintain an export compliance program but there are risks that the compliance controls could be circumvented, exposing us to legal liabilities. We must also comply with export restrictions and laws imposed by other countries affecting trade and investments. Although these restrictions and laws have not significantly restricted our operations in the recent past, there is a risk that they could do so in the future.

Risks Relating to Sales, Marketing and Competition

We compete against larger, more established entities and our market share may be reduced if we are unable to respond to our competitors effectively

The semiconductor industry is intensely competitive and is characterized by price erosion, rapid technological change, and design and other technological obsolescence. We compete with domestic and international semiconductor companies, many of which have substantially greater financial and other resources with which to pursue engineering, manufacturing, marketing and distribution of their products. Some of these competitors include: Linear Technology Corporation, Maxim Integrated Products Inc., Microsemi and Monolithic Power Systems Inc., with respect to our Power Management and High Reliability products; and STMicroelectronics N.V., NXP Semiconductors N.V., ON Semiconductor Corporation, and Infineon Technologies AG, with respect to our Protection products. Our primary competitors with respect to our Advanced Communication products are

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Broadcom Corporation, ClariPhy Communications, Inc., and our customer’s own internal solutions. Our primary competitors with respect to our Wireless and Sensing products include Silicon Laboratories, Texas Instruments Inc., Atmel Corporation, Analog Devices Inc., and Cypress Semiconductor Corporation. With respect to our Gennum Product Group, we consider our primary competitors to include Texas Instruments, Maxim Integrated, Inc., Mindspeed Technology Inc., and Inphi Corporation.

We expect continued competition from existing competitors as well as competition from new entrants in the semiconductor market. Our ability to compete successfully in the rapidly evolving area of integrated circuit technology depends on several factors, including:

• success in designing and manufacturing new products that implement new technologies;

• protection of our processes, trade secrets and know-how;

• maintaining high product quality and reliability;

• pricing policies of our competitors;

• performance of competitors’ products;

• ability to deliver in large volume on a timely basis;

• marketing, manufacturing and distribution capability; and

• financial strength.

To the extent that our products achieve market success, competitors typically seek to offer competitive products or lower prices; if they are successful, they could harm our business.

We receive a significant portion of our revenues from a small number of customers and the loss of any one of these customers or failure to collect a receivable from them could adversely affect our business

Our largest customers have varied from year to year. Historically, we have had significant customers that individually accounted for 10% or more of consolidated revenues in certain quarters or represented 10% or more of net accounts receivables at any given date. One of our authorized distributors regularly accounts for more than 10% of net sales on an annual basis. Depending on the authorized distributor and their strategic focus, they can support anywhere from a few end-customers to many end-customers.

Concentration of Net Sales - Significant Customers

	Fiscal Years
(percentage of net sales)	2013		2012		2,011
Samsung Electronics (and affiliates)	12	%	13	%	12	%
Huawei Technologies (and affiliates)	10	%	7	%	8	%
Frontek Technology Corp	6	%	10	%	11	%

Concentration of Accounts Receivable - Significant Customers

	Fiscal Years
(percentage of net accounts receivable as of fiscal year end)	2013		2012
Samsung Electronics (and affiliates)	12	%	14	%
Frontek Technology Corp	4	%	10	%
Dragon Technology	3	%	11	%
Huawei Technologies (and affiliates)	14	%	11	%

In addition to those customers representing greater than 10% of net sales listed above, we had several end-customers in fiscal year 2013 that, on an annual basis, accounted for more than 3% of net sales, but less than 10% of net sales.

Sales to our customers are generally made on open account, subject to credit limits we may impose, and the receivables are subject to the risk of being uncollectible.

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We primarily conduct our sales on a purchase order basis, rather than pursuant to long-term contracts. The loss of any significant customer, any material reduction in orders by any of our significant customers, the cancellation of a significant customer order or the cancellation or delay of a customer’s significant program or product could harm our business.

Most of our authorized distributors, which together represent approximately half of our net sales, can terminate their contract with us with little or no notice. The termination of a distributor could negatively impact our business, including net sales and accounts receivable

In fiscal year 2013, authorized distributors accounted for approximately 39% of our net sales. We generally do not have long-term contracts with our distributors and most can terminate their agreement with us with little or no notice. For fiscal year 2013, our two largest distributors were based in Asia.

The termination of any of our distributor relationships could impact our net sales and limit our access to certain end-customers. It could also result in the return of excess inventory of our product held by that distributor. Since many distributors simply resell finished products, they generally operate on very thin profit margins. If a distributor were to terminate an agreement with us or go out of business, our accounts receivable from the particular distributor would be subject to significant collection risk.

Risks Relating to Governmental Regulations, including Taxes, Financial Reporting Rules and Regulations, and Environmental Regulations

We are subject to government regulations and other standards that impose operational and reporting requirements

We, our suppliers, and our customers are subject to a variety of United States federal, foreign, state and local governmental laws, rules and regulations, including those related to the use, storage, handling, discharge or disposal of certain toxic, volatile or otherwise hazardous chemicals and the incorporation of such substances into products available for sale. If we or our suppliers were to incur substantial additional expenses to acquire equipment or otherwise comply with environmental regulations, product costs could significantly increase, thus harming our business.

We are also subject to laws, rules, and regulations related to export licensing and customs requirements, including the International Traffic in Arms Controls, the North American Free Trade Agreement and State Department and Commerce Department rules.

Additional laws, rules and regulations at the United States federal and relevant foreign levels governing data privacy protections for personal information, and corrupt practices/anti-bribery prohibitions, impact our business in terms of ongoing monitoring of compliance. Legislation and related regulations in the United Kingdom under that country’s Bribery Act could have extra-territorial application of compliance standards that may be inconsistent with comparable United States law, requiring the Company to re-evaluate and amend its compliance programs, policies and initiatives.

The SEC and NASDAQ have revised, and continue to revise, their regulations and listing standards. These developments have increased, and may continue to increase, our legal compliance and financial reporting costs. These developments also may make it more difficult and more expensive for us to obtain director and officer liability insurance, and we may be required to accept reduced coverage or incur substantially higher costs to obtain coverage. This, in turn, could make it more difficult for us to attract and retain qualified members of our Board of Directors, or qualified executive officers.

Failure to comply with present or future laws, rules and regulations of any kind that govern our business could result in suspension of all or a portion of production, cessation of all or a portion of operations, or the imposition of significant regulatory, administrative, civil, or criminal penalties or sanctions, any of which could harm our business.

Our failure to comply with any applicable environmental regulations could result in a range of consequences, including fines, suspension of production, excess inventory, sales limitations, and criminal and civil liabilities and new regulations related to “conflict minerals” may force us to incur additional expenses, may make our supply chain more complex and may result in damage to our reputation with customers.

We are subject to various state, federal and international laws and regulations governing the environment, including restricting the presence of certain substances in electronic products and making producers of those products financially responsible for the collection, treatment, recycling and disposal of those products. Although our management systems are designed to maintain compliance, we cannot assure you that we have been or will be at all times in complete compliance with such laws and regulations. If we violate or fail to comply with any of them, a range of consequences could result, including fines, import/export restrictions, sales limitations, criminal and civil liabilities or other sanctions. We could also be held liable for any and all consequences arising out of exposure to hazardous materials used, stored, released, disposed of by us or located at, under or emanating from our facilities or other environmental or natural resource damage.

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Environmental laws are complex, change frequently and have tended to become more stringent over time. For example, the European Union and China are two among a growing number of jurisdictions that have enacted in recent years restrictions on the use of lead, among other chemicals, in electronic products. These regulations affect semiconductor packaging. There is a risk that the cost, quality and manufacturing yields of lead-free products may be less favorable compared to lead-based products or that the transition to lead-free products may produce sudden changes in demand, which may result in excess inventory.

Future environmental legal requirements may become more stringent or costly and our compliance costs and potential liabilities arising from past and future releases of, or exposure to, hazardous substances may harm our business and our reputation.

On August 22, 2012, under the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010, or the Dodd-Frank Act, the SEC adopted new requirements for companies that use certain minerals and metals, known as conflict minerals, in their products, whether or not these products are manufactured by third parties. These requirements will require companies to diligence, disclose and report whether or not such minerals originate from the Democratic Republic of Congo and adjoining countries. We will have to diligence whether such minerals are used in the manufacture of our products. The implementation of these new requirements could adversely affect the sourcing, availability and pricing of such minerals used in the manufacture of semiconductor devices. As a result, there may only be a limited pool of suppliers who provide conflict free metals, and we cannot assure you that we will be able to obtain products in sufficient quantities or at competitive prices. In addition, we will incur additional costs to comply with the disclosure requirements, including costs related to determining the source of any of the relevant minerals and metals used in our products. Also, since our supply chain is complex, we may face reputational challenges with our customers and other stockholders if we are unable to sufficiently verify the origins for all metals used in our products. In such event, we may also face difficulties in satisfying customers who require that all of the components of our products are certified as conflict mineral free. The first report is due on May 31, 2014 for the 2013 calendar year. However, in October 2012, the U.S. Chamber of Commerce, the National Association of Manufacturers and the Business Roundtable filed a petition challenging the adoption of the rules by the SEC. It is presently unclear if this challenge will delay the effectiveness of the rule.

Changes in tax laws may materially impact tax liabilities and our effective tax rate

We do not provide U.S. federal or state taxes for our unremitted income of wholly owned foreign subsidiaries that is considered to be permanently reinvested offshore and is not otherwise subject to current domestic taxation. The current U.S. Administration and Congress have proposed changes to current U.S. tax law, including international tax reform that, if enacted, could materially impact our tax liabilities and effective tax rate.

We are subject to review by taxing authorities, including the Internal Revenue Service

We are subject to review by domestic and foreign taxing authorities, including the Internal Revenue Service (“IRS”). Tax years prior to 2009 (fiscal year 2010) are generally not subject to examination by the IRS except for items with tax attributes that could impact open tax years. Changes to our tax filings could materially impact our tax liabilities and effective tax rate.

We may be subject to taxation in other jurisdictions which could negatively affect our operations

As a global organization, we may be subject to a variety of transfer pricing or permanent establishment challenges by taxing authorities in various jurisdictions. If certain of our non-U.S. activities were treated as carrying on business as a permanent establishment and therefore, subject to income tax in such jurisdiction, our results of operations could be materially adversely affected.

Failure to maintain effective internal control over financial reporting or disclosure controls and procedures could have a material adverse effect on our business and stock price

Section 404 of the Sarbanes-Oxley Act requires an annual management assessment of the effectiveness of internal controls over financial reporting and an annual report by our independent registered public accounting firm opining on our internal controls over financial reporting. Management is similarly required to review disclosure controls, which are controls established to ensure that information required to be disclosed in SEC reports is recorded, processed, summarized and reported in a timely manner.

If we fail to maintain the adequacy of our internal controls, as such standards are modified, supplemented or amended from time to time, we may not be able to ensure that we can conclude on an ongoing basis that we have effective internal control over financial reporting. Effective internal controls are necessary for us to produce reliable financial reports and are important in the prevention of financial fraud. If we cannot produce reliable financial reports or prevent fraud, our business and operating results could be harmed, investors could lose confidence in our reported financial information, and there could be a material

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adverse effect on our stock price. If we fail to maintain adequate disclosure controls and procedures, the reports we file with the SEC, including the financial statements contained therein, could be inaccurate or misleading.

Government investigations and inquiries from regulatory agencies could lead to enforcement actions, fines, restatement of our financial statements or other penalties and could result in litigation against us.

In the past, we have been subject to government investigations and inquiries from regulatory agencies such as the SEC and we have had to restate our historical financial statements in connection with such inquiry related to our historical stock option practices. We may be subject to government investigations and receive additional inquiries from regulatory agencies in the future, which may lead to enforcement actions, fines or other penalties.

In addition, litigation has often been brought against a company in connection with the announcement of a government investigation or inquiry from a regulatory agency. Such lawsuits could result in the diversion of management’s time and attention away from business operations, which could harm our business. In addition, the costs of defense and any damages resulting from litigation, a ruling against us, or a settlement of the litigation could adversely affect our cash flow and financial results.

If such government investigations or inquiries result in a restatement of our financial statements, this could delay the filing of our subsequent SEC reports which, in turn, might result in the delisting of our common stock from the NASDAQ Stock Market for failure to meet continued listing requirements.

Risks Relating to our Business Strategies, Personnel and Other Operations

The loss of any of our key personnel or the failure to attract or retain specialized technical and management personnel could impair our ability to grow our business

Our future success depends upon our ability to attract and retain highly qualified technical, marketing and managerial personnel. We are dependent on a relatively small group of key technical personnel with analog and mixed-signal expertise. Personnel with highly skilled managerial capabilities, and analog and mixed-signal design expertise, are scarce and competition for personnel with these skills is intense. There can be no assurance that we will be able to retain key employees or that we will be successful in attracting, integrating or retaining other highly qualified personnel in the future. If we are unable to retain the services of key employees or are unsuccessful in attracting new highly qualified employees, our business could be harmed.

If our stock price declines below the exercise price of stock options held by our employees, the retention incentive aspect of the stock options is lost and there is a greater likelihood we will be unable to retain key talent.

We face risks associated with companies we have acquired in the past and may acquire in the future

We have expanded our operations through strategic acquisitions, such as the acquisition of SMI in December 2009 and Gennum Corporation in March 2012, and we may continue to expand and diversify our operations with additional acquisitions. Acquisitions have used and could use in the future a significant portion of our available liquid assets or we could incur debt or issue equity securities to fund acquisitions. Issuance of equity securities could be dilutive to existing shareholders. Debt financing could subject us to restrictive covenants that could have an adverse effect on our business. Although we undertake detailed reviews of proposed acquisition candidates and attempt to negotiate acquisition terms favorable to us, we may encounter difficulties or incur liabilities for which we have no recourse. We cannot provide any assurance that any acquisition will have a positive impact on our future performance.

If we are unsuccessful in integrating acquired companies into our operations or if integration is more difficult than anticipated, then we may not achieve anticipated cost savings or synergies and may experience disruptions that could harm our business. Some of the risks that may affect our ability to successfully integrate acquired companies include those associated with:

• conforming the acquired company’s standards, processes, procedures and controls with our operations;

• coordinating new product and process development, especially with respect to highly complex technologies;

• assuring acquired products meet our quality standards;

• loss of key employees or customers of the acquired company;

• hiring additional management and other critical personnel;

• increasing the scope, geographic diversity and complexity of our operations;

• consolidation of facilities and functions;

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• the geographic distance between the companies; and

• disparate corporate cultures.

Acquisitions could have a negative impact on our future earnings by way of poor performance by the acquired company or, if we later conclude we are unable to use or sell an acquired product or technology, we could be required to write down the related intangible assets and goodwill.

Our ability to generate the significant amount of cash needed to service our debt obligations or to obtain additional financing depends on many factors beyond our control.

We completed the acquisition of Gennum on March 20, 2012 and entered into senior secured first lien credit facilities in an aggregate principal amount of $350 million as described further under “Note 10- Credit Facilities.” Prior to the completion of the acquisition of Gennum, we did not have any material outstanding indebtedness. As a result of the incurrence of such debt, we expect our consolidated interest expense will increase and our ability to make payments on amounts borrowed under our credit facilities, and to fund our operations will depend on our ability to generate substantial operating cash flow. Our cash flow generation will depend on our future performance, which will be subject to prevailing economic conditions and to financial, business and other factors, many of which are beyond our control.

Our business may not generate sufficient cash flow from operations and, if we cannot service our debt, we will have to take actions such as reducing or delaying capital investments, selling assets, or seeking additional equity capital. We may not be able to, if required, effect these actions on commercially reasonable terms, or at all. Because of these and other factors beyond our control, we may be unable to pay the interest on or other amounts in respect of our indebtedness.

Restrictive covenants in the credit agreement governing our senior secured first lien credit facilities may restrict our ability to pursue our business strategies.

The credit agreement governing our senior secured first lien credit facilities contain a number of restrictive covenants that impose significant operating and financial restrictions on us and may limit our ability to engage in acts that may be in our long-term best interests. The credit agreement includes covenants restricting, among other things, our and our subsidiaries’ ability to:

• incur or guarantee additional debt or issue certain preferred stock;

• pay dividends or make distributions on our capital stock or redeem, repurchase or retire our capital stock;

• make certain investments and acquisitions;

• create liens on our or our subsidiaries’ assets;

• enter into transactions with affiliates;

• merge or consolidate with another person or sell or otherwise dispose of substantially all of our assets;

• make certain payments in respect of other material indebtedness;

• alter the business that we conduct; and

• make certain capital expenditures.

Under the credit agreement, we are required to maintain a total leverage ratio and an interest expense coverage ratio. Our ability to meet such financial ratios can be affected by events beyond our control, and we cannot assure you that we will be able to meet such ratios. The credit agreement also contains various covenants and restrictions and a breach of any covenant or restriction could result in a default under our credit agreement. If any such default occurs, the lenders may elect (after the expiration of any applicable notice or grace periods) to declare all outstanding borrowings, together with accrued and unpaid interest and other amounts payable thereunder, to be immediately due and payable. Further, following an event of default under our credit facilities, the lenders will have the right to proceed against the collateral granted to them to secure that debt. If the debt under our credit facilities were to be accelerated, our assets may not be sufficient to repay in full that debt that may become due as a result of that acceleration.

We rely on certain critical information systems for the operation of our business

We maintain and rely upon certain critical information systems for the effective operation of our business. These information systems include telecommunications, the Internet, our corporate intranet, various computer hardware and software applications, network communications, and e-mail. These information systems may be owned by us or by our outsource providers or even

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third parties such as vendors and contractors and may be maintained by us or by such providers or third parties. These information systems are subject to attacks, failures, and access denials from a number of potential sources including viruses, destructive or inadequate code, power failures, and physical damage to computers, hard drives, communication lines and networking equipment. To the extent that these information systems are under our control, we have implemented security procedures, such as virus protection software and emergency recovery processes, to address the outlined risks; however, security procedures for information systems cannot be guaranteed to be failsafe and our inability to use or access these information systems at critical points in time could unfavorably impact the timely and efficient operation of our business. Additionally, any compromise of our information security could result in the unauthorized publication of our confidential business or proprietary information or the unauthorized release of customer or employee data and result in a violation of privacy or other laws, thus exposing us to litigation or damage to our reputation.

The costs associated with our indemnification of certain customers, distributors, and other parties could be higher in future periods

In the normal course of our business, we indemnify other parties, including customers, distributors, and lessors, with respect to certain matters. These obligations typically arise pursuant to contracts under which we agree to hold the other party harmless against losses arising from a breach of representations and covenants related to certain matters, such as acts or omissions of our employees, infringement of third-party intellectual property rights, and certain environmental matters. We have not incurred any significant expense as a result of agreements of this type in at least a decade, but there can be no assurances that we will not incur expense under these indemnification provisions in the future.

We have also entered into agreements with our current and former directors and certain of our current and former executives indemnifying them against certain liabilities incurred in connection with their duties. Our Certificate of Incorporation and Bylaws contain similar indemnification obligations with respect to our current and former directors and employees, as does the California Labor Code. We cannot estimate the amount of potential future payments, if any, that we might be required to make as a result of these agreements.

Our share price could be subject to extreme price fluctuations, and stockholders could have difficulty trading shares

Historically, the market for the stock of high technology companies has been volatile, and the market price of our common stock has been and may continue to be subject to significant fluctuations. Fluctuations could be in response to items such as operating results, announcements of technological innovations, or market conditions for technology stocks in general. Additionally, the stock market in recent years has experienced extreme price and volume fluctuations that often have been unrelated to the operating performance of individual companies. These market fluctuations, as well as general economic conditions, may adversely affect the price of our common stock.

In addition, the future sale of a substantial number of shares of common stock by us or by our existing stockholders or option holders (including directors, officers, and employees, some of whom hold stock options that are approaching their expiration date) may have an adverse impact on the market price of the shares of common stock. There can be no assurance that the trading price of our common stock will remain at or near its current level.

Our decision to implement a new Enterprise Resource Planning (“ERP”) software platform has been subject to some delay, could be subject to further delays, may cost more than expected and could interrupt operational transactions during and following the implementation.

We are currently implementing SAP’s enterprise resource planning software and making related enhancements to our integrated financial and supply chain management systems. This process is complex, time-consuming and expensive. Operational disruptions during the course of this process or delays in or results from the implementation of these enhancements could materially impact our operations. Our ability to forecast sales demand, ship products, manage our product inventory and record and report financial and management information on a timely and accurate basis could be impaired while we are making these enhancements, as well as after we complete the implementation.

We have already experienced some delay in the implementation of the ERP system and there is no guarantee that other delays will not take place. Further changes in scope, timeline or cost could have a material adverse effect on our results of operation.

Item 1B.    Unresolved Staff Comments

None.

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Item 2.        Properties

Our headquarters are located in Camarillo, California where we own an approximately 87,600 square foot facility that was completed in 2002. The parcel on which our headquarters is located can accommodate substantial expansion. The Camarillo facility houses inside sales, marketing and administrative offices as well as a very limited amount of test and probe activity.

We own a 30,000 square foot building in Reynosa, Mexico that supports some of the assembly and production needs of the Power Management and High-Reliability product line.

We lease an approximately 10,000 square foot building in San Diego, California that houses design, test and administrative functions and serves as a development center for our Wireless and Sensing product line. The lease on this facility runs through September 2014, with an option to extend for an additional five years.

Our Redondo Beach, California facilities consist of approximately 26,300 total square feet of leased space which house general offices for business functions relating to certain products of our Advanced Communications product line. The leases on these facilities expire at various times between 2013 and 2015. For the portion of the facilities for which the lease expires in 2013, we intend to continue occupancy in that space under a month to month tenancy. We also lease approximately 35,000 square feet in Irvine, California which facility houses design, test and administrative functions for our Advanced Communications product line. The leases on the Irvine facilities expire between 2014 and 2015.

We lease a facility in Wil, Switzerland which serves as corporate headquarters for our Semtech International AG subsidiary and houses finance, administrative and other general functions. The lease on this facility runs through June 2019. In addition, we lease office and warehouse space in Neuchatel, Switzerland, the headquarters for our Wireless and Sensing product line. The lease on this facility expires in March 2016.

We also lease space to house certain of our other administrative, design, sales and marketing, and operations in San Jose, California; Raleigh, North Carolina; Buckingham Township (Philadelphia), Pennsylvania; Canada; China; Finland; France; Germany; India; Japan; Lithuania; Mexico; South Korea; Sweden; the Philippines; Taiwan; and the United Kingdom.

We believe that our existing leased and owned space is more than adequate for our current operations, and that suitable replacement and additional space will be available in the future on commercially reasonable terms.

Item 3. Legal Proceedings

The descriptions of the legal proceedings in Note 15 to the financial statements included in this report are incorporated by reference to this Item 3.

ITEM 4. Mine Safety Disclosures

Not applicable.

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PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

Market Information

During fiscal years 2013 and 2012, our common stock traded on the NASDAQ Global Select Market under the symbol “SMTC.” The following table sets forth, for the periods indicated, the high and low sale prices of our common stock, as reported on the NASDAQ market, giving effect to all stock splits through the date hereof.

	High	Low
Fiscal year ended January 27, 2013:
First Quarter	$30.46	$25.54
Second Quarter	$27.59	$22.22
Third Quarter	$27.10	$23.18
Fourth Quarter	$30.12	$22.95
Fiscal year ended January 29, 2012:
First Quarter	$28.29	$21.30
Second Quarter	$29.47	$22.88
Third Quarter	$26.23	$19.16
Fourth Quarter	$29.40	$20.45

On March 22, 2013, the reported last sale price of our common stock on the NASDAQ Global Select Market was $33.69 per share.

Holders

As of March 22, 2013, we had 287 holders of record of our common stock.

Dividends

The payment of dividends on our common stock is within the discretion of our Board of Directors. Currently, we intend to retain earnings to finance the growth of our business. We have not paid cash dividends on our common stock during at least the five most recent fiscal years and our Board of Directors has not indicated any intent to declare a cash dividend on the common stock in the foreseeable future. The credit agreement governing our senior secured first lien credit facilities entered into in connection with our acquisition of Gennum includes covenants limiting our ability to pay dividends or make distributions on our capital stock.

Purchases of Equity

Information with respect to purchases by the Company of shares of common stock during the fourth quarter of fiscal year 2013 follows:

Issuer Purchases of Equity Securities

Fiscal Month/Year	Total Number of Shares Purchased  (2)	Average Price Paid per Share		Total Number of Shares Purchased as Part of  Publicly Announced Program	Approximate Dollar Value  of Shares That May Yet  Be Purchased Under  The Program (1)
November 2012 (10/29/12-11/25/12)	—	$	—	—	$50.0 million
December 2012 (11/26/12-12/23/12)	178,085	$	28.37	178,085	$45.0 million
January 2013 (12/24/12-01/27/13)	85,358	$	28.67	85,358	$42.5 million
Total activity in the fourth quarter	263,443			263,443

(1) On March 4, 2008, we announced that our Board of Directors authorized the repurchase of up to $50 million of our common stock from time to time through negotiated or open market transactions (“2008 Program”). This stock repurchase program does not have an expiration date. On August 24, 2011, we announced a $36 million expansion of the 2008 Program. On November 30, 2011, we announced an additional $50 million expansion of our existing stock repurchase program.

(2) The table does not include shares surrendered to us in connection with the cashless exercise of stock options by employees and directors or shares surrendered to us to cover tax liabilities upon vesting of restricted stock.

Securities Authorized for Issuance Under Equity Compensation Plans

See the information set forth in Part III, Item 12 of this Form 10-K.

Sales of Unregistered Securities

We did not make any unregistered sales of equity securities during fiscal year 2013.

Performance Graph

This chart and graph show the value of a $100 cash investment on the last day of fiscal year 2008 in (i) the Company’s common stock, (ii) the NASDAQ Composite Index, and (iii) the Philadelphia Semiconductor Index. Note that historic stock price performance is not necessarily indicative of future stock price performance.

Fiscal Year	2008		2009		2010		2011		2012		2013
Semtech	$	100	$	93	$	120	$	175	$	233	$	240
NASDAQ Composite	$	100	$	64	$	92	$	116	$	121	$	135
PHLX SEMICONDUCTOR SECTOR	$	100	$	59	$	89	$	124	$	117	$	117

The information contained in this Item 5 under the heading “Performance Graph” (i) is being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, and (ii) shall not be incorporated by reference into any registration statement or other document pursuant to the Exchange Act, or the Securities Act, except as shall be expressly set forth by specific reference in such filing to this Item 5 Performance Graph information.

Item 6.        Selected Financial Data

The consolidated statement of income data set forth below for fiscal years 2013, 2012 and 2011 and the consolidated balance sheet data as of the end of fiscal years 2013 and 2012 are derived from, and qualified by reference to, the audited consolidated financial statements included in Item 8 of this report. The consolidated statement of income data for fiscal years 2010 and 2009 and the consolidated balance sheet data as of the end of fiscal years 2011, 2010 and 2009 are derived from the audited financial statements previously filed with the SEC on Form 10-K.

This information should be read in conjunction with Management’s Discussion and Analysis contained in Item 7 of this report, the audited financial statements and accompanying notes included in Item 8 of this report, and the corresponding items included in our Form 10-K for fiscal years 2012, 2011 and 2010.

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The fiscal year ended January 31, 2010 consisted of fifty-three weeks with the extra week falling in the fourth quarter. All other fiscal years presented consisted of fifty-two weeks. Our past results are not necessarily indicative of our future performance.

Income Statement Data

	Fiscal Year Ended
(in thousands, except per share amounts)	January 27, 2013			January 29, 2012		January 30, 2011		January 31, 2010		January 25, 2009
Net sales	$	578,827		$	480,601	$	454,502	$	286,560	$	294,820
Cost of sales	264,215			194,956		186,196		130,514		135,233
Gross profit	314,612			285,645		268,306		156,046		159,587
Operating costs and expenses:
Selling, general and administrative	149,070			100,629		110,404		77,934		75,200
Product development and engineering	120,009			80,577		69,624		44,847		41,405
Intangible amortization	29,944			10,853		9,520		2,348		1,091
Total operating costs and expenses	299,023			192,059		189,548		125,129		117,696
Operating income	15,589			93,586		78,758		30,917		41,891
Interest expense	(14,363		)	—		—		—		—
Interest income and other (expense) income, net	(977		)	593		574		3,054		4,287
Income before taxes	249			94,179		79,332		33,971		46,178
(Benefit) provision for taxes	(41,690		)	5,092		6,760		33,014		8,657
Net income	$	41,939		$	89,087	$	72,572	$	957	$	37,521
Earnings per share:
Basic	$	0.64		$	1.37	$	1.16	$	0.02	$	0.61
Diluted	$	0.62		$	1.32	$	1.12	$	0.02	$	0.61
Weighted average number of shares used in computing earnings per share:
Basic	65,809			65,099		62,339		60,779		61,249
Diluted	67,472			67,350		64,523		61,676		61,999
Anti-dilutive shares not included in the EPS calculations	783			625		1,700		8,900		10,600

Balance Sheet Data

(in thousands)	January 27, 2013		January 29, 2012		January 30, 2011		January 31, 2010		January 25, 2009
Cash, cash equivalents and investments	$	236,072	$	327,665	$	258,342	$	162,223	$	258,815
Working capital	248,311		360,330		259,873		146,086		279,887
Total assets	1,171,013		726,321		659,943		514,294		420,795
Long term debt, less current	282,286		—		—		—		—
Other long-term liabilities	34,177		29,151		37,503		35,173		8,960
Total stockholders’ equity	694,826		630,188		528,615		405,741		378,020

Note 1: The Company acquired Gennum on March 20, 2012 and Cycleo SAS on March 7, 2012. Both of these acquisitions occurred during our fiscal year 2013 with Gennum being the more significant of the two. As a result, fiscal year 2013 reflects almost a full year on these acquisitions in our consolidated statements of income.

The Company acquired SMI on December 9, 2009 and Leadis Technology Inc. on February 6, 2009. Both of these acquisitions occurred during our fiscal year 2010 with SMI being the more significant of the two. As a result, fiscal year 2011 reflects a full year on these acquisitions in our consolidated statements of income.

Refer to Note 3 to our audited consolidated financial statements included in Item 8 of this report.

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Item 7.         Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion and analysis of our financial condition and results of operations should be read in conjunction with Item 6 “Selected Consolidated Financial Data” and our audited consolidated financial statements and related notes included elsewhere in this Form 10-K.

As discussed in “Special Note Regarding Forward-Looking and Cautionary Statements” earlier in this report, this Form 10-K contains forward-looking statements that involve risks and uncertainties. Our actual results could differ materially from those anticipated in the forward looking statements, including as a result of the risks described in the cautionary statements in Item 1A “Risk Factors” and elsewhere in this Form 10-K, in our other filings with the SEC, and in material incorporated herein and therein by reference. We undertake no duty to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

Overview

We are a leading supplier of analog and mixed-signal semiconductor products and were incorporated in Delaware in 1960. We design, produce and market a broad range of products that are sold principally into applications within the high-end consumer, industrial, enterprise computing and communications end-markets. The high-end consumer market includes handheld products, tablet computers, set-top boxes, digital televisions, digital video recorders, thunderbolt and fiberless high-speed interfaces and other consumer equipment. Applications for the industrial market include broadcast studio equipment, automated meter reading, military and aerospace, medical, security systems, automotive, industrial and home automation, video security and surveillance and other industrial equipment. Enterprise computing product markets include optical receiver and transceiver, desktops, notebooks, servers, graphic boards, monitors, printers, and other computer peripherals. Communications market applications include base stations, backplane, optical networks, carrier networks, switches and routers, servers, cable modems, signal conditioners, wireless LAN, and other communication infrastructure equipment. Our end-customers are primarily original equipment manufacturers and their suppliers, including Alcatel-Lucent, Cisco Systems, Inc., Huawei Technologies Co., Ltd., LG Electronics, Motorola, Nokia Siemens Networks, Itron, Apple, Phonak International, Research In Motion Limited, Samsung Electronics Co., and ZTE Corporation.

On March 20, 2012, we, through our wholly-owned subsidiary Semtech Canada Inc., completed the acquisition of all outstanding equity interests of Gennum Corporation (“Gennum”) (TSX: GND), a leading supplier of high speed analog and mixed-signal semiconductors for the optical communications and video broadcast markets.

Upon consummation of the acquisition, which constituted a change in control of Gennum, Gennum’s stock option awards and restricted shares became fully vested. We acquired 100% of the outstanding shares and vested stock options, restricted shares, and deferred share units of Gennum for CDN$13.55 per share for a total purchase price of $506.5 million. The acquisition was financed with a combination of cash from our international cash reserves and $347 million (net of original issue discount of $3 million) of five-year secured term loans with a combined interest rate of approximately 4% (see Note 10 to our audited consolidated financial statements included in Item 8 of this report).

Our primary reasons for the acquisition were to broaden our existing portfolio of high-speed communications platforms with Gennum’s 1 Gbps to 25 Gbps signal integrity platform, to complement our 40 Gbps to 100 Gbps SerDes solutions and to create one of the industry’s most complete and robust analog and mixed signal portfolios. In addition, Gennum’s strong position in video broadcast and the emerging HD video surveillance market further diversifies our portfolio of high-performance analog semiconductors and provides cross-selling potential with the combined customer base.

On March 7, 2012, we completed the acquisition of Cycleo SAS (“Cycleo”), a privately held company based in France that develops IP for wireless long-range semiconductor products used in smart metering and other industrial and consumer markets. This transaction, which was accounted for using the acquisition method of accounting, complements our current wireless offerings and will bring customers a set of high-end, digitally enhanced wireless solutions. Under the terms of the agreement, we paid the stockholders of Cycleo $5 million in cash at closing.

The audited consolidated financial statements for the fiscal year 2013 include the results of operations of Gennum and Cycleo commencing as of the acquisition dates.

We operate our business in one enterprise-wide reportable segment. Most of our sales to customers are made on the basis of individual customer purchase orders. Many customers include cancellation provisions in their purchase orders. Trends within the industry toward shorter lead-times and “just-in-time” deliveries have resulted in our reduced ability to predict future shipments. As a result, we rely on orders received and shipped within the same quarter for a significant portion of our sales. Orders received and shipped in fiscal years 2013 represented 41% of net sales. Sales made directly to customers during fiscal year 2013 were 61% of net sales. The remaining 39% of net sales were made through independent distributors.

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Our business relies on foreign-based entities. Most of our outside subcontractors and suppliers, including third-party foundries that supply silicon wafers, are located in foreign countries, including China, Taiwan, the United States, Canada, Europe and Israel. For the fiscal year ended January 27, 2013, approximately 38% of our silicon, in terms of cost of wafers purchased, was manufactured in China. Foreign sales for fiscal year 2013 constituted approximately 83% of our net sales. Approximately 84% of foreign sales in fiscal year 2013 were to customers located in the Asia-Pacific region. The remaining foreign sales were primarily to customers in Europe and Canada.

Results of Operations

Fiscal Year 2013 Compared With Fiscal Year 2012

Presented below is our estimate of net sales by end-market.

	Fiscal Years
(in thousands, except percentages)	2013				2012				Change
Enterprise Computing	$	85,945	15	%	$	41,716	9	%	106	%
Communications	181,791		31	%	186,479		39	%	(3	)%
High-End Consumer	169,847		29	%	168,520		35	%	1	%
Industrial and Other	141,243		25	%	83,886		17	%	68	%
Total	$	578,826	100	%	$	480,601	100	%	20	%

Net Sales. Net sales for fiscal year 2013 were $578.8 million, an increase of 20% compared to $480.6 million for fiscal year 2012. Fiscal year 2013 revenues increased driven by strengthening demand in the enterprise computing and industrial end markets and by the impact of approximately $129.6 million of Gennum sales in the current fiscal year, partially offset by a slight decrease in demand from the high-end consumer and communications end markets. Fiscal year 2012 was also impacted by softening global economic conditions that resulted in a reduction in orders of our component products during the fiscal year.

Higher revenue in the enterprise computing market is driven primarily by demand for the Gennum Product Group optical communications products. Within the communications category, lower revenue was attributed to softer demand for 40G communications products in our Advanced Communications product line, partially offset by increasing demand for 100G communication products. High-end consumer revenues were relatively flat due to softer demand in Protection products due to reduced demand from a North American Tier 1 smartphone customer offset by increasing demand for Gennum Product Group Thunderbolt cables. Higher revenue in the industrial category was attributed to video broadcast applications in the Gennum Product Group and continued strength in the medical business of our Wireless and Sensing Group.

Gross Profit. Gross profit was $314.6 million and $285.6 million in fiscal years 2013 and 2012, respectively. Our gross margin was 54.4% for fiscal year 2013, down from 59.4% in fiscal year 2012. Gross profit margins for fiscal year 2013 were negatively impacted by the amortization of $39.4 million of the fair value adjustment related to acquired inventory recorded to cost of sales from the Gennum acquisition which offset a favorable end-market product mix driven primarily by the impact of approximately $129.6 million of Gennum sales in fiscal year 2013.

Operating Costs and Expenses.

	Fiscal Years
(in thousands, except percentages)	2013				2012
	Cost/Exp.		% net sales		Cost/Exp.		% net sales		Change
Selling, general and administrative	$	149,070	26	%	$	100,629	21	%	48	%
Product development and engineering	120,009		21	%	80,577		17	%	49	%
Intangible amortization and impairments	29,944		5	%	10,853		2	%	176	%
Total operating costs and expenses	$	299,023	52	%	$	192,059	40	%	56	%

Selling, General & Administrative Expenses

Selling, general and administrative (“SG&A”) expenses for fiscal year 2013increased by $48.4 million or 48% driven primarily by $11.4 million of transaction and integration expenses due to the acquisition of Gennum and Cycleo in March 2012 and the impact of incremental Gennum SG&A expenses.

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Selling, general and administrative expenses for fiscal years 2013 include approximately $2.5 million environmental reserves and $13.4 million severance costs associated with the integration of the acquired Gennum business with the Company’s pre-existing business (refer to Note 15 and Note 17 to our audited consolidated financial statements for details). Fiscal year 2012 includes $2.0 million for expenses attributed to a reorganization plan initiated during the third quarter of fiscal year 2012 which resulted in consolidation of research and development activities and reduction in workforce.

SG&A stock-based compensation expense was $15.0 million and $15.8 million in fiscal years 2013 and 2012, respectively. The year over year decrease in equity compensation was principally driven by staffing reductions associated with our reorganization actions in fiscal year 2012 partially offset by the increase in stock price in fiscal year 2013.

Product Development and Engineering Expenses

Product development and engineering expenses for fiscal years 2013 and 2012 were $120.0 million and $80.6 million, respectively or an increase of 49%. The increase in fiscal year 2013 is principally driven primarily by the inclusion of Gennum expenses of $40.9 million since March 2012.

The levels of product development and engineering expenses reported in a fiscal period can be significantly impacted, and therefore experience period over period volatility, by the number of new product tape-outs and by the timing of recoveries from non-recurring engineering services which are typically recorded as a reduction to product development and engineering expense.

Intangible Amortization and Impairments

Intangible amortization and impairments was $29.9 million and $10.9 million in fiscal years 2013 and 2012, respectively. The increase reflects the impact of $19.7 million intangible amortization related to the acquisition of Gennum and an impairment charge of $0.7 million attributed to assets acquired from SMI Inc. As of January 27, 2013, we had a total of $228.6 million of gross carrying amount of finite-lived intangible assets, which included $129.9 million related to the acquisition of Gennum.

The purchase price allocation for the Gennum acquisition included $29.1 million of acquired in-process research and development (“IPR&D”) projects. Each project was analyzed to determine the unique technological innovations, the existence and reliance on core technology, the existence of any alternative future use or current technological feasibility, and the complexity, cost and time to complete the remaining development.

The fair value of the IPR&D projects was determined using an income approach or replacement cost approach as applicable. The replacement cost approach was used for IPR&D projects that were considered long-term core investments and were not anticipated to be profitable for a period of time. IPR&D projects which were valued using an income approach, measured the returns attributable to each specific IPR&D project, discounted to present value using a risk-adjusted rate of return, including as appropriate, any tax benefits derived from amortizing the intangible asset for tax purposes. Significant factors considered in the calculation of the rate of return are the weighted average cost of capital and return on assets, as well as the risks inherent in the development process, including the likelihood of achieving technological success and market acceptance. For IPR&D projects valued using a replacement cost approach, value was estimated by developing the cost to either replace or reproduce (replicate) the IPR&D to its current state.

The top three IPR&D projects that comprise $21.0 million of the total $29.1 million IPR&D balance are for enterprise computing, communications and high-end consumer products. The following table summarizes the significant assumptions underlying the valuation for such three IPR&D projects at the acquisition date:

Development Projects	Estimated Percent Complete	Estimated Time to Complete (in years)	Estimated Cost to Complete (in millions)	Risk Adjusted Discount Rate	Valuation Approach	IPR&D (In millions)
Video Platform	10%-14%	1.7 to 1.9	$3.4 - $10.4	12%	Income	$4.0
Backplane	36%-40%	0.2 to 0.4	$18.4 - $20.2	NA	Replacement Cost	$12.0
Consumer	44%-48%	0.2	$5.2 - $6.0	NA	Replacement Cost	$5.0

Costs, timing, and successful completion are subject to additional risk factors such as (i) increase in the projected technological risk of completion, (ii) decrease in the projected market size for the developed product, and (iii) subsequent decisions to postpone or delay the development of the IPR&D project. Actual results to date have been consistent, in all material respects, with our assumptions at the time of the acquisition.

Acquired in-process research and development was tested for impairment as of November 30, 2012, the date of our annual impairment review. With the exception of the impairment charge of $0.7 million recorded to write-off acquired IPR&D from

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SMI, we concluded that the fair value of the acquired in-process research and developments exceeded the carrying value and no impairment existed as of January 27, 2013 (see Note 8 to our audited consolidated financial statements).

Interest Expense. Interest expense was $14.4 million in fiscal year 2013. There was no interest expense in fiscal year 2012. The increase was due to interest expense and the amortization of the original issue discount and debt issuance costs related to the credit facilities to finance the acquisition of Gennum (see Notes 3 and 10 to our audited consolidated financial statements).

We are currently assessing our financing alternatives and may decide to replace our existing debt with lower interest debt in fiscal year 2014.

Interest Income and Other Expense, Net. Interest income and other expense, net was $(977,000) in fiscal year 2013, compared to $593,000 in fiscal year 2012. In fiscal year 2013, the interest income and other expense is primarily made of $(700,000) Swiss Stamp duty tax liabilities. In addition, interest income in fiscal year 2013 is lower as a result of a significant liquidation of investment to pay for acquisitions.

Provision for Taxes. The benefit for income taxes was $41.7 million for fiscal year 2013 compared to a provision of $5.1 million for fiscal year 2012. The effective tax rate for fiscal year 2013 reflects the impact of the one-time $23.4 million benefit related to our change in assertion regarding $70 million of foreign subsidiary earnings. Because income before taxes was near break-even for fiscal year 2013, comparison of year-over-year effective tax rates is meaningless.

In fiscal year 2010, we concluded that $120 million of foreign subsidiary earnings were no longer considered to be permanently reinvested offshore. In the first quarter of fiscal year 2013, in connection with the acquisition of Gennum, we reviewed our assertion regarding the amount of foreign subsidiary earnings that were considered to be permanently reinvested offshore and concluded that due to post-acquisition foreign operating cash needs, all of our foreign subsidiary earnings are considered to be permanently reinvested offshore. This change in assertion resulted in the recognition of a one-time tax benefit of $23.4 million in the first quarter of fiscal year 2013.

In fiscal year 2013, our tax provision was adversely affected by a net increase to our valuation allowance of $2.7 million. This net increase was primarily the result of concerns related to our ability to utilize our California net operating losses due to a projected lower California apportionment in future years.

Fiscal Year 2012 Compared With Fiscal Year 2011

Presented below is our estimate of net sales by end-market.

	Fiscal Years
(in thousands, except percentages)	2012				2011				Change
Enterprise Computing	$	41,716	9	%	$	42,728	9	%	(2	)%
Communications	186,479		39	%	166,419		37	%	12	%
High-End Consumer	168,520		35	%	151,945		33	%	11	%
Industrial and Other	83,886		17	%	93,410		21	%	(10	)%
Total	$	480,601	100	%	$	454,502	100	%	6	%

Net Sales. Net sales for fiscal year 2012 were $480.6 million, an increase of 6% from $454.5 million for fiscal year 2011. Fiscal year 2012 revenues increased driven by strengthening demand in the communications and consumer end markets. Fiscal year 2012 was also impacted by softening global economic conditions that resulted in a reduction in orders of our component products during the fiscal year.

Higher revenue in the communications end market was attributed to the impact of strengthening demand for our 40G and 100G communications infrastructure products in our Advanced Communications product line. Higher revenues in the high-end consumer end market were driven by strengthening demand for Protection products in consumer applications including LCD TVs, smartphones and tablet computers. Enterprise computing revenues were roughly flat. Within the industrial category, lower revenue was attributed to softer demand from the military segment in our Power Management and High-Reliability and Advanced Communications product lines.

Gross Profit. Gross profit was $285.6 million and $268.3 million for fiscal years 2012 and 2011, respectively. Our gross margin was 59.4% for fiscal year 2012, up from 59.0% in fiscal year 2011. Gross profit margins for fiscal year 2012 were positively impacted by higher revenues, increased manufacturing volumes and the impact of reduced equity compensation

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expenses attributed to staffing reductions associated with a reduction in workforce. These factors offset the impact of a higher mix of consumer and enterprise computing revenues relative to communications and industrial revenues.

Operating Costs and Expenses.

	Fiscal Years
(in thousands, except percentages)	2012				2011
	Cost/Exp.		% net sales		Cost/Exp.		% net sales		Change
Selling, general and administrative	$	100,629	21	%	$	110,404	24	%	(9	)%
Product development and engineering	80,577		17	%	69,624		15	%	16	%
Intangible amortization and impairments	10,853		2	%	9,520		2	%	14	%
Total operating costs and expenses	$	192,059	40	%	$	189,548	41	%	1	%

Selling, General & Administrative Expenses

Selling, general and administrative expenses for fiscal year 2012decreased by $9.8 million or 9% driven by the reduction in class action lawsuit expenses as the Company settled the litigation in August 2011, and lower equity compensation expenses partially offset by the impact of transaction expenses, reorganization charges and the impact of higher staffing and information technology infrastructure upgrade spending. Approximately $2.9 million of transaction expenses attributed to the acquisition of Gennum and the evaluation of other acquisition candidates were recorded in fiscal year 2012.

Selling, general and administrative expenses for fiscal years 2012 and 2011 include approximately $0.2 million and $13.6 million (net of insurance recoveries of $10 million), respectively, for legal and other professional services incurred in connection with matters related to our historical stock option practices, including the government inquiries, the related litigation, and other associated matters. Fiscal year 2012 includes $2.0 million for expenses attributed to a reorganization plan initiated during the third quarter of fiscal year 2012 which resulted in consolidation of research and development activities and reduction in workforce.

SG&A stock-based compensation expense was $15.8 million and $19.3 million in fiscal years 2012 and 2011, respectively. The year over year decrease in equity compensation was principally driven by staffing reductions associated with our reorganization actions.

Product Development and Engineering Expenses

Product development and engineering expenses for fiscal years 2012 and 2011 were $80.6 million and $69.6 million, respectively or an increase of 16%. The increase in fiscal year 2012 is principally driven by the impact of increased new product and process development expenditures primarily in the Advanced Communications and Protection product lines. In addition, fiscal year 2012 includes a $0.9 million expense associated with the impairment of a new process development initiative.

Intangible Amortization and Impairments

Intangible amortization and impairments, which reflects amortization costs associated with acquired intangibles, increased by $1.3 million in fiscal year 2012 compared to fiscal year 2011, as a result of the impact of impairment charges attributed to assets acquired from Leadis Technology Inc. During the third quarter of fiscal year 2012, we abandoned certain development efforts related to acquired intangible assets and recorded an impairment charge of $2.5 million.

Interest Expense. There was no interest expense in fiscal year 2012 and 2011.

Interest Income and Other Expense, Net. Interest income and other expense, net was $593,000 for fiscal year 2012, up from $574,000 in fiscal year 2011. For fiscal years 2012 and 2011, the primary source of income was interest from investments offset by loss from foreign currency transactions.

Provision for Taxes. The provision for income taxes was $5.1 million for fiscal year 2012 compared to $6.8 million for fiscal year 2011. The effective tax rates for fiscal year 2012 and fiscal year 2011 were 5.4% and 8.5%, respectively. The rate for fiscal year 2012 reflects the impact of favorable trends in our regional mix of income. We expect our regional income trends to remain favorable. However, certain items which occurred in fiscal year 2012 are not expected to recur in fiscal year 2013. One such item includes a one-time benefit of $3.9 million related to a release of previously recorded reserves for uncertain tax positions, as a result of statutes of limitations for the taxing authority to challenge the positions expiring.

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In fiscal year 2012, our tax provision was adversely affected by a net increase to our valuation allowance of $2.1 million. This net increase was primarily the result of concerns related to our ability to utilize our California net operating losses due to a projected lower California apportionment in future years.

Liquidity and Capital Resources

Our capital requirements depend on a variety of factors, including but not limited to, the rate of increase or decrease in our existing business base; the success, timing and amount of investment required to bring new products to market; revenue growth or decline; and potential acquisitions. We believe that we have the financial resources necessary to meet business requirements for the next 12 months, including funds needed for working capital requirements.

As of January 27, 2013, our total shareholders’ equity was $694.8 million. At that date we also had approximately $228.2 million in cash and cash equivalents, $7.9 million in long-term investments, and total debt of $330.7 million.

Our primary sources and uses of cash during the comparative fiscal years are presented below:         

	Fiscal Year Ended
(in millions)	January 27, 2013			January 29, 2012			January 30, 2011
Sources of Cash
Operating activities	$	102.0		$	99.8		$	93.8
Proceeds from exercise of stock options including tax benefits	12.9			45.0			30.7
Proceeds from sale of investments	112.5			131.7			111.0
Issuance of debt, net of original issue discount and debt issuance cost	338.0			—			—
	$	565.4		$	276.5		$	235.5
Uses of Cash
Capital expenditures, net of sale proceeds	$	(23.3	)	$	(21.5	)	$	(25.5	)
Acquisitions, net of cash acquired	(491.7		)	—			—
Purchase of intangible assets	(1.3		)	(3.0		)	—
Purchases of investments	(24.7		)	(93.3		)	(168.8		)
Purchase of cost method investments	(2.5		)	—			—
Payment of long-term debt	(16.9		)	—			—
Payment for interest rate cap	(1.1		)	—			—
Repurchase of common stock	(7.8		)	(50.7		)	(2.8		)
	$	(569.3	)	$	(168.5	)	$	(197.1	)
Effect of exchange rate increase on cash and cash equivalents	$	0.1		$	—		$	—
Net (decrease) increase in cash and cash equivalents	$	(3.8	)	$	108.0		$	38.4

We incur significant expenditures in order to fund the development, design, and manufacture of new products. We intend to continue to focus on those areas that have shown potential for viable and profitable market opportunities, which may require additional investment in equipment and the hiring of additional design and application engineers aimed at developing new products. Certain of these expenditures, particularly the addition of design engineers, do not generate significant payback in the short-term. We plan to finance these expenditures with cash generated by our operations and our existing cash balances.

A meaningful portion of our capital resources, and the liquidity they represent, are held by our foreign subsidiaries. As of January 27, 2013, our foreign subsidiaries held approximately $180.2 million of cash, cash equivalents, and short-term investments compared to $271.4 million at January 29, 2012. The decline was attributable to using approximately $213.0 million to partially fund the acquisitions of Gennum and Cycleo and to cover transaction and other related expenses.

One of our primary goals is to improve the cash flows from our existing business activities. Our cash, cash equivalents and investments give us the flexibility to use our free cash flow to return value to shareholders (in the form of stock repurchases) and also pursue business improvement opportunities.

Additionally, we will continue to seek to maintain and improve our existing business performance with capital expenditures and, potentially, acquisitions that meet our rate of return requirements. Acquisitions might be made for either cash or stock consideration, or a combination of both.

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Operating Activities

Net cash provided by operating activities is primarily due to net income adjusted for non-cash items plus fluctuations in operating assets and liabilities.

Operating cash flows for fiscal year 2013 was impacted by several significant non-cash transaction related items including $39.4 million of purchase accounting adjustments related to inventory acquired from Gennum, $19.7 million of amortization expense for acquired intangible assets from Gennum. Also, accretion of deferred financing costs and debt discount was $2.5 million.

Investing Activities

Cash used for investing activities is primarily attributable to the acquisitions of Gennum and Cycleo, capital expenditures, purchases of investments, offset by proceeds from the sales/maturities of investments. Our marketable securities investment portfolio is invested primarily in highly rated securities, generally with a minimum rating of A/A2 or equivalent.

Capital expenditures were $23.3 million for fiscal year 2013 compared to $21.6 million for fiscal year 2012. Acquisitions of Gennum and Cycleo were $491.7 million, net of cash acquired. Funding of the purchase price was sourced from cash and cash equivalents, credit facilities and required the liquidation of a significant amount of our temporary and long-term investments.

Financing Activities

Cash provided by financing activities is primarily attributable to the following: net proceeds from credit facilities, proceeds from the exercise of stock options offset by the repurchase of common stock under the Company’s stock repurchase program and the payment of statutory tax withholding obligations resulting from the vesting of restricted stock settled by withholding shares.

In addition to using our cash, we incurred debt of $347 million (net of original issue discount of $3 million) in term loans during the quarter to complete the Gennum acquisition. On March 20, 2012, we entered into the senior secured first lien credit facilities in the aggregate principal amount of $350 million (the “Facilities”), consisting of Term A loans in an aggregate principal amount of $100 million (the “Term A Loans”) and Term B loans in an aggregate principal amount of $250 million (the “Term B Loans”). Both the Term A Loans and the Term B Loans mature on March 20, 2017. Repayments of long term debt during the fiscal year 2013 totaled $16.9 million. In accordance with the stipulations in the credit agreement, we entered into an interest rate cap agreement protecting at least 50% of the variable interest rate exposure on the term loans and made an upfront payment of $1.1 million in June 2012. Under the terms of the Facilities, we may request, at any time, subject to certain conditions, the establishment of one or more additional term loan facilities in an aggregate principal amount not to exceed $150 million, the proceeds of which may be used for working capital and general corporate purposes. The Facilities are subject to customary affirmative and negative covenants. We were in compliance with such covenants as of January 27, 2013 and we expect to remain in compliance with these covenants.

Pursuant to the Credit Agreement, under certain circumstances, the Company is obligated to apply 50% of its excess cash flow (as defined in the Credit Agreement) for each fiscal year, as well as net cash proceeds from specified other sources, such as asset sales, debt issuances or insurance proceeds, to prepay the Term A Loans and Term B Loans. The first excess cash flow payment is estimated to be $26.6 million. The earliest date that any such payment may be due is 95 days after the last day of the fiscal year ending closest to January 31, 2013. The Company has classified the potential early payment of $26.6 million from “Long term debt” to “Current portion - long term debt” in the consolidated balance sheets as of January 27, 2013.

The Company may decide to replace and refinance its Facilities associated with the Gennum acquisition. The Company does not believe the terms associated with the new facilities will have a significant impact on the Company’s liquidity or operations.

For fiscal year 2013, cash proceeds from the exercise of stock options were $12.9 million compared to $42.7 million in fiscal year 2012.

We do not directly control the timing of the exercise of stock options. Such exercises are independent decisions made by grantees and are influenced most directly by the stock price and the expiration dates of stock awards. Such proceeds are difficult to forecast, resulting from several factors which are outside our control. We believe that such proceeds will remain an important secondary source of cash after cash flow from operating activities.

We currently have in effect a stock repurchase program. This program represents one of our principal efforts to return value to our shareholders. In fiscal year 2013 and fiscal year 2012, we repurchased 0.3 million and 2.3 million shares, respectively, under this program for $7.5 million and $50 million, respectively. On August 24, 2011, we announced a $36 million expansion of our existing stock repurchase program. Refer to Exhibit 99.1 of our current report on Form 8-K filed with the SEC on

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August 24, 2011 for the complete announcement. On November 30, 2011, we announced an additional $50 million expansion of our existing stock repurchase program. Refer to Exhibit 99.1 of our current report on Form 8-K filed with the SEC on November 30, 2011 for the complete announcement.

In addition to the stock repurchase program, shares valued at $0.3 million and $0.7 million were withheld in connection with the vesting of restricted stock to cover statutory tax withholding obligations in the fiscal years 2013 and 2012, respectively.

Off-Balance Sheet Arrangements     

We do not have any off-balance sheet arrangements, as those arrangements are defined by the SEC, that are reasonably likely to have a material effect on our financial condition, revenues or expenses, results of operations, liquidity, capital expenditures or capital resources.

We do not have any unconsolidated subsidiaries or affiliated entities. We have no special purpose or limited purpose entities that provide off-balance sheet financing, liquidity or market or credit risk support. We do not engage in leasing, hedging, research and development services, or other relationships that expose us to liability that is not reflected on the face of the financial statements.

Noted below under “Contractual Obligations” are various commitments we have associated with our business, such as lease commitments and open purchase obligations, which are not recorded as liabilities on our balance sheet because we have not yet received the related goods or services as of January 27, 2013.

Contractual Obligations

Presented below is a summary of our contractual obligations as of January 27, 2013.

(in thousands)	Less than 1 year		1-3 years		4-5 years		After 5 years		Total
Long-term debt	$	49,100	$	45,000	$	239,025	$	—	$	333,125
Operating leases	8,743		10,269		6,461		11,383		36,856
Open capital purchase commitments	1,451		—		—		—		1,451
Other open purchase commitments	57,314		7,327		—		—		64,641
Other vendor commitments	1,200		300		—		—		1,500
Deferred compensation	760		2,369		494		12,118		15,741
Stock-based compensation	3,241		5,738		—		—		8,979
Total contractual cash obligations	$	121,809	$	71,003	$	245,980	$	23,501	$	462,293

Capital purchase commitments, other open purchase commitments and other vendor commitments are for the purchase of plant, equipment, raw material, supplies and services. They are not recorded as liabilities on our balance sheet as of January 27, 2013, as we have not yet received the related goods or taken title to the property.

We maintain a deferred compensation plan for certain officers and key executives that allow participants to defer a portion of their compensation for future distribution at various times permitted by the plan. Our liability for deferred compensation under this plan was $13.9 million and $11.1 million as of January 27, 2013 and January 29, 2012, respectively, and is included in accrued liabilities and other long-term liabilities on the balance sheet and in the table above. The plan provides for a discretionary Company match up to a defined portion of the employee’s deferral, with any match subject to a vesting period.

In addition, during the fiscal year ended January 27, 2013, the Company recognized $1.8 million deferred compensation liability related to the payment of Cycleo earn-out liability which is contingent upon employment at the end of the four-year period beginning on April 30, 2012.

We have purchased whole life insurance on the lives of some of our current and former deferred compensation plan participants. This Company-owned life insurance is held in a grantor trust and is intended to cover a majority of our costs of the deferred compensation plan. The cash surrender value of our Company-owned life insurance was $10.0 million as of January 27, 2013 and $10.2 million as of January 29, 2012, and is included in other assets.

We have $11.1 million of accrued taxes for uncertain tax positions. We believe that it is reasonably possible that the amount of unrecognized tax benefits will decrease by approximately $0.2 million within twelve months as a result of expiring statutes.

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Inflation

Inflationary factors have not had a significant effect on our performance over the past several years. A significant increase in inflation would affect our future performance.

Critical Accounting Policies and Estimates

Our consolidated financial statements are prepared in accordance with generally accepted accounting principles (“GAAP”). In connection with the preparation of our financial statements, we are required to make assumptions and estimates about future events, and apply judgments that affect the reported amounts of assets, liabilities, revenue, expenses and the related disclosures. We base our assumptions, estimates and judgments on historical experience, current trends and other factors that management believes to be relevant at the time our consolidated financial statements are prepared. On a regular basis, management reviews the accounting policies, assumptions, estimates and judgments to ensure that our financial statements are presented fairly and in accordance with GAAP. However, because future events and their effects cannot be determined with certainty, actual results could differ from our assumptions and estimates, and such differences could be material.

Our significant accounting policies are discussed in Note 2 to our audited consolidated financial statements, included in Item 8, of this report on Form 10-K. We believe that the following accounting estimates are the most critical to aid in fully understanding and evaluating our reported financial results, and they require our most difficult, subjective or complex judgments, resulting from the need to make estimates about the effect of matters that are inherently uncertain. We have reviewed these critical accounting estimates and related disclosures with the Audit Committee of our Board of Directors.

Allowance for Doubtful Accounts

We evaluate the collectability of our accounts receivable based on a combination of factors. If we are aware of a customer’s inability to meet its financial obligations to us, we record an allowance to reduce the net receivable to the amount we reasonably believe we will be able to collect from the customer. For all other customers, we recognize allowances for doubtful accounts based on the length of time the receivables are past due, the current business environment, the size and number of certain large accounts and our historical experience. If the financial condition of our customers were to deteriorate or if economic conditions worsen, additional allowances may be required in the future.

Revenue and Cost of Sales

We recognize product revenue when persuasive evidence of an arrangement exists, delivery has occurred, the fee is fixed or determinable and collectability is probable. Product design and engineering recoveries is recognized during the period in which services are performed. We include revenue related to granted technology licenses as part of “Net sales.” Historically, revenue from these arrangements has not been significant though it is part of our recurring ordinary business. In the third quarter of fiscal year 2013, we entered into a single licensing arrangement that resulted in the recognition of $7.5 million of revenue.

We record a provision for estimated sales returns in the same period as the related revenues are recorded. We base these estimates on historical sales returns and other known factors. Actual returns could be different from our estimates and current provisions for sales returns and allowances, resulting in future charges to earnings.

We defer revenue recognition on shipment of products to certain customers, principally distributors, under agreements which provide for limited pricing credits or product return privileges, until these products are sold through to end-users or the return privileges lapse. For sales subject to certain pricing credits or return privileges, the amount of future pricing credits or inventory returns cannot be reasonably estimated given the relatively long period in which a particular product may be held by the customer. Therefore, we have concluded that sales to customers under these agreements are not fixed and determinable at the date of the sale and revenue recognition has been deferred. We estimate the deferred gross margin on these sales by applying an average gross profit margin to the actual gross sales. The average gross profit margin is calculated for each category of material using current standard costs. The estimated deferred gross margin on these sales, where there are no outstanding receivables, is recorded on the balance sheet under the heading of “Deferred revenue.” There were no significant impairments of deferred cost of sales in fiscal year 2013 or fiscal year 2012.

35

The following table summarizes the deferred net revenue balance:

(in thousands)	January 27, 2013		January 29, 2012
Deferred revenues	$	4,467	$	4,964
Deferred cost of revenues	1,099		1,243
Deferred revenue, net	3,368		3,721
Deferred product design and engineering recoveries	377		132
Total deferred revenue	$	3,745	$	3,853

Inventory Valuation

Our inventories are stated at lower of cost or market and consist of materials, labor and overhead. We determine the cost of inventory by the first-in, first-out method. At each balance sheet date, we evaluate our ending inventories for excess quantities and obsolescence. This evaluation includes analyses of sales levels by product and projections of future demand. In order to state our inventory at lower of cost or market, we maintain specific reserves against our inventory which serve to write-down our inventories to a new cost basis. If future demand or market conditions are less favorable than our projections, a write-down of inventory may be required, and would be reflected in cost of goods sold in the period the revision is made.

Business Combinations

Business combinations are accounted for at fair value. Acquisition costs are expensed as incurred and recorded in general and administrative expenses; in-process research and development is recorded at fair value as an indefinite-lived intangible asset at the acquisition date; restructuring costs associated with a business combination are expensed subsequent to the acquisition date; contingent consideration obligations are recorded at fair value on the date of acquisition, with increases or decreases in the fair value arising from changes in assumptions or discount periods recorded as contingent consideration expenses in the consolidated statement of operations in subsequent periods; and changes in deferred tax asset valuation allowances and income tax uncertainties after the acquisition date generally affect income tax expense. All changes that do not qualify as measurement period adjustments are included in current period earnings. The fair values assigned to tangible and intangible assets acquired and liabilities assumed, including contingent consideration, are based on management’s estimates and assumptions, as well as other information compiled by management, including valuations that utilize customary valuation procedures and techniques. Significant judgment is required in estimating the fair value of intangible assets acquired in a business combination and in assigning their respective useful lives. The fair value estimates are based on available historical information and on future expectations and assumptions deemed reasonable by management at the time.

If the actual results differ from the estimates and judgments we utilized, the amounts recorded in the financial statements could result in a possible impairment of the intangible assets and goodwill, or require acceleration of the amortization expense of finite-lived intangible assets.

Interest Rate Derivative

We manage interest expense using variable rate debt. To manage its interest rate risk, we occasionally hedge the future cash flows of its variable rate debt, principally through interest rate contracts with major financial institutions. Interest rate cap contracts involve the receipts of variable amounts from a counterparty when one-month LIBOR exceeds the capped interest rate in exchange for an upfront payment from us, capping our one-month LIBOR floating interest payments at the strike rate on its interest rate cap contract. Interest rate contracts that meet specific criteria are accounted for as cash flow hedges.

The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive income, net of taxes, and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings. Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest expense as interest payments are made on our variable-rate debt.

The assessment of effectiveness is based on the total changes in an option’s cash flows such that the assessment will include the interest rate caps entire change in fair value. The interest rate cap is considered a highly effective hedge since the key features and terms match with the hedged item at inception. Key features and terms are notional amount, cap effective date, rate threshold, index, repricing dates, payments dates, and maturity dates.

36

Contingencies and Litigation

We record accruals for contingencies when it is probable that a liability has been incurred and the amount can be reasonably estimated. These accruals are adjusted periodically as assessments change or additional information becomes available. Individually significant contingent losses are accrued when probable and reasonably estimable.

The legal defense costs we accrue is based on reviews by outside counsel, in-house counsel and management and some of the significant factors considered in the review of these reserves are as follows: the actual costs incurred by the Company; the development of the Company's legal defense strategy and structure in light of the scope of its litigation; the number of cases being brought against the Company; the costs and outcomes of completed trials and the most current information regarding anticipated timing, progression, and related costs of pre-trial activities and trials in the associated litigation.

In those situations where the Company is unable to determine the best estimate within the range of loss, it will record the minimum amount in the identified range of probable loss.

Stock-Based Compensation

We measure compensation cost for all share-based payments (including stock options) at fair value using a valuation model, which considers, among other things, estimates and assumptions on the rate of forfeiture, expected life of options and stock price volatility. If any of the assumptions used in the valuation model change significantly, stock-based compensation expense may differ materially in the future from that recorded in the current period and actual results may differ from estimates.

Impairment of Goodwill, Other Intangibles and Long-Lived Assets

We test goodwill and other indefinite-lived intangible assets for impairment in the fourth quarter of each fiscal year or more frequently if we believe indicators of impairment exist. The value of our intangible assets, including goodwill, could be impacted by future adverse changes such as: (i) any future declines in our operating results, (ii) a decline in the valuation of technology company stocks, including the valuation of our common stock, (iii) a significant slowdown in the worldwide economy and the semiconductor industry or (iv) any failure to meet the performance projections included in our forecasts of future operating results. For our annual impairment review, we primarily use a multi-period excess earnings approach methodology of valuation that includes the discounted cash flow method as well as other generally accepted valuation methodologies to determine the fair value of the assets. Our assumptions incorporate judgments as to the price received to sell a reporting unit as a whole in an orderly transaction between market participants at the measurement date. Considering the integration of our operations, we have assumed that the highest and best use of a reporting unit follows an “in-use” valuation premise. Significant management judgment is required in the forecasts of future operating results that are used in the discounted cash flow method of valuation. The estimates we have used are consistent with the plans and estimates that we use to manage our business. It is possible, however, that the plans and estimates used may be incorrect. If our actual results, or the plans and estimates used in future impairment analysis, are lower than the original estimates used to assess the recoverability of these assets, we could incur impairment charges in a future period.

Goodwill is tested for impairment as of November 30    , the date of our annual impairment review. We estimated the fair values of our reporting units using the income approach, which requires significant judgments, including estimation of future cash flows, which is dependent on internal forecasts, estimation of the long-term rate of growth for our business, estimation of the useful life over which cash flows will occur, and determination of our weighted average cost of capital. Our analysis included sensitivity analysis of key assumptions such as a 10% increase in the weighted-average cost of capital, a 10% increase in the effective tax rate or a 5% decline in our compound annual growth rate noting the fair value of the goodwill associated with the Advanced Communications, the Wireless and Sensing, and Gennum reporting units exceeded their respective carrying values and no impairment existed as of January 27, 2013.

The Company reviews indefinite-lived intangible assets for impairment annually or whenever events or changes in circumstances indicate the carrying value may not be recoverable. Recoverability of indefinite-lived intangible assets is measured by comparing the carrying amount of the asset to the future discounted cash flows that asset is expected to generate. Acquired in-process research and development projects (“IPR&D”) is tested for impairment as of November 30, the date of the Company’s annual goodwill impairment review.

We record impairment losses on long-lived assets used in operations when indicators of impairment, such as reductions in demand or significant economic slowdowns in the semiconductor industry, are present. Reviews are performed to determine whether the carrying value of an asset is impaired, based on comparisons to undiscounted expected future cash flows. If this comparison indicates that there is impairment, the impaired asset is written down to fair value, which is typically calculated using: (i) quoted market prices and/or (ii) discounted expected future cash flows utilizing a discount rate. Impairment is based on the excess of the carrying amount over the fair value of those assets.

37

Accounting for Income Taxes

As part of the process of preparing our consolidated financial statements, we are required to estimate our income taxes in each of the jurisdictions in which we operate. This process involves estimating our actual current tax liability together with assessing temporary differences resulting from differing treatment of items for tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are included within our consolidated balance sheet.

We must assess the likelihood that our deferred tax assets will be recovered from future taxable income and to the extent we believe that recovery is not likely, we must establish a valuation allowance. Generally, to the extent we change a valuation allowance; the change is recorded through the tax provision in the statement of operations. Management periodically evaluates our deferred tax assets to assess whether it is likely that the deferred tax assets will be realized. In determining whether a valuation allowance is required, we consider projected taxable income. The most significant assumptions used in preparing projections of taxable income include forecasting the levels of income by region and the amount of deductible stock based compensation.

We are subject to income taxes in both the United States and numerous foreign jurisdictions. Significant management estimates are required in determining our worldwide provision for income taxes. In the ordinary course of our business, there are many transactions and calculations where the ultimate tax impact is uncertain. The calculation of tax liabilities involves dealing with uncertainties in the application of complex tax laws. We recognize liabilities for uncertain tax positions based on a two-step process. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step requires us to estimate and measure the tax benefit as the largest amount that is more than 50% likely of being realized upon ultimate settlement. It is inherently difficult and subjective to estimate such amounts, as this requires us to determine the probability of various possible outcomes. We reevaluate these uncertain tax positions on a quarterly basis. This evaluation is based on factors including, but not limited to, changes in facts or circumstances, changes in tax law, effectively settled issues under audit, and new audit activity. Such a change in recognition or measurement would result in the recognition of a tax benefit or an additional charge to the tax provision in the period of change. Although we believe the estimates are reasonable, no assurance can be given that the final outcome of these matters will not be different than what is reflected in the historical income tax provisions and accruals. Should additional taxes be assessed as a result of an audit or litigation, a material effect on our income tax provision and net income in the period or periods for which that determination is made could result.

The income tax effects of share-based payments are recognized for financial reporting purposes only if such awards are expected to result in a tax deduction. We do not recognize a deferred tax asset for an excess tax benefit (that is, a tax benefit that exceeds the amount of compensation cost recognized for the award for financial reporting purposes) that has not been realized. In determining when an excess tax benefit is realized, we have elected to follow the ordering provision of the tax law.

In addition to the risks to the effective tax rate discussed above, the effective tax rate reflected in forward-looking statements is based on current enacted tax law. Significant changes in enacted tax law could materially affect these estimates.

In general, the amount of taxes we pay will differ from our reported tax provision as a result of differences between accounting for income under U.S. GAAP and accounting for taxable income. Typical book-tax differences include expense related to equity compensation, deemed dividends, depreciation, litigation expense and amortization of intangible assets. As a result of these book-tax differences, our tax payments are expected to exceed our tax provision during the next three years.

For intra-entity differences between the tax basis of an asset in the buyer’s tax jurisdiction and their cost as reported in the consolidated financial statements, we do not recognize a deferred tax asset. Income taxes paid on intra-entity profits on assets remaining within the group are accounted for as prepaid taxes.

We continually review our position on undistributed earnings from our foreign subsidiaries to determine whether those earnings are indefinitely reinvested offshore. Domestic and foreign operating cash flow forecasts are reviewed to determine the sources and uses of cash. Based on these forecasts, we determine the need to accrue deferred tax liabilities associated with our undistributed earnings offshore.

38

New Accounting Standards

In February 2013, the FASB issued an accounting standards update regarding the reporting of reclassifications out of accumulated other comprehensive income. This update, which will be effective prospectively for reporting periods beginning after December 15, 2012, requires disclosure of amounts reclassified out of accumulated other comprehensive income by component. In addition, an entity is required to present either on the face of the statement of operations or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income but only if the amount reclassified is required to be reclassified to net income in its entirety in the same reporting period. For amounts not reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures that provide additional detail about those amounts. The Company will adopt the disclosure requirements of this update for the quarter ending April 28, 2013.

Item 7A.     Quantitative and Qualitative Disclosures About Market Risk

We are subject to a variety of market risks, including commodity risk and the risks related to foreign currency, interest rates and market performance that are detailed below. Many of the factors that can have an impact on our market risk are external to us, and so we are unable to fully predict them.

Market Conditions

Current global economic conditions pose a risk to the overall economy as consumers and businesses may defer purchases in response to the uncertainty around tighter credit and negative financial news. These conditions have historically resulted in periods where demand for our products is reduced.

In addition to risks associated with global economic conditions, demand for our products could be different from our expectations due to customer acceptance of our products, changes in customer order patterns, including order cancellations, and changes in the level of inventory held by vendors.

Commodity Risk

We are subject to risk from fluctuating market prices of certain commodity raw materials, particularly gold, that are incorporated into our end products or used by our suppliers to process our end products. Increased commodity prices are passed on to us in the form of higher prices from our suppliers, either in the form of general price increases or a commodity surcharge. Although we generally deal with our suppliers on a purchase order basis rather than on a long-term contract basis, we generally attempt to obtain firm pricing for volumes consistent with planned production. Our gross margins may decline if we are not able to increase selling prices of our products or obtain manufacturing efficiencies to offset the increased cost. We do not enter into formal hedging arrangements to mitigate against commodity risk.

Foreign Currency Risk

As a global enterprise, we face exposure to adverse movements in foreign currency exchange rates and we could experience foreign currency exchange gains or losses. Historically, we have not considered our foreign currency exposure to be material. Therefore, we have not utilized foreign currency hedging products to mitigate foreign currency risks. Our foreign currency exposures may increase over time as the level of activity in foreign markets grows. Changes in the rates could have an adverse impact upon our financial results.

A relatively small amount of our monetary assets and liabilities are denominated in foreign currencies, principally the Swiss Franc, Canadian dollars, Mexican Peso, British Pound Sterling and the Euro. Fluctuations in these currencies relative to the United States dollar will result in transaction gains or losses included in net earnings.

All of our foreign sales, which amounted to $488.1 million in fiscal year 2013, are denominated in United States dollars. Currency exchange rate fluctuations in foreign countries where we do business could harm our business by resulting in pricing that is not competitive with prices denominated in local currencies.

39

For fiscal year 2013, we spent approximately $42.3 million in Canadian dollars, $16.8 million in British Pound Sterling, $14.4 million in Swiss Francs, $4.6 million in Euros, $4.6 million in Japanese Yen, and $7.7 million in Mexican Pesos for operating expenses.

In general, we purchase foreign currencies on a spot basis as needed to fund local operations. As of January 27, 2013, we held cash funds of $16.7 million denominated in Canadian dollars, $0.8 million denominated in British Pound Sterling, $1.0 million denominated in Swiss Francs, $4.4 million denominated in Euros and $1.4 million denominated in Japanese Yen, and $0.7 million denominated in Mexican Pesos. We did not hold a significant amount of other foreign currencies. If rates of these foreign currencies were to strengthen or weaken relative to the U.S. dollar, we would realize gains or losses in converting these funds back into U.S. dollars.

Interest Rate and Market Risk

As a result of entering into the $350 million long-term debt with variable interest rates, our operating results are exposed to fluctuations in interest rates. Pursuant to the Credit Agreement, we were required to enter into an interest rate hedging agreement protecting at least 50% of all the variable interest rate exposure on the term loans within 90 days of entering into the Credit Agreement. We do not engage in the trading of derivative financial instruments in the normal course of business. On June 18, 2012, we entered into an interest rate cap agreement to fulfill the requirements of our Credit Agreement (see Note 11 to our audited consolidated financial statements for more information). In the event interest rates were to increase 100 basis points and holding all other variables constant, annual net income and cash flows for the following year would decrease by approximately $1.0 million associated with the Company’s variable-rate debt, including the effect of the interest rate contract. The effect of the 100 basis points increase would decrease the fair value of our variable-rate debt by approximately $3.4 million.

Interest rates affect our return on excess cash and investments. As of January 27, 2013, we had $223.2 million of cash and cash equivalents and $12.9 million of temporary and long-term investments. A majority of our cash and cash equivalents and investments generate interest income based on prevailing interest rates. Investments and cash and cash equivalents generated interest income of $0.4 million in fiscal year 2013. A significant change in interest rates would impact the amount of interest income generated from our cash and investments. It would also impact the market value of our investments.

Our investments are subject to market risks, primarily interest rate and credit risk. Our investments are managed by a limited number of outside professional managers following investment guidelines set by us. Such guidelines prescribe credit quality, permissible investments, diversification, and duration restrictions. These restrictions are intended to limit risk by restricting our investments to high quality debt instruments with relatively short-term durations. Our investment strategy limits investment of new funds and maturing securities to U.S. Treasury, Federal agency securities, high quality money market funds and time deposits with our principal commercial banks.

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Item 8.         Financial Statements and Supplementary Data

The information required by Item 8 is presented in the following order:

Management’s Report on Internal Control Over Financial Reporting	42
Report of Independent Registered Public Accounting Firm on Internal Control Over Financial Reporting	42
Report of Independent Registered Public Accounting Firm on the Consolidated Financial Statements	43
Consolidated Statements of Income	44
Consolidated Statements of Comprehensive Income	45
Consolidated Balance Sheets	46
Consolidated Statements of Stockholders’ Equity	47
Consolidated Statements of Cash Flows	48
Notes to Consolidated Financial Statements	49
Schedule II — Valuation and Qualifying Accounts	86

41

MANAGEMENT’S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING

The report called for by Item 308(a) of Regulation S-K is incorporated herein by reference to the Report of Management on Internal Control Over Financial Reporting that is included in Part II, Item 9A of this report.

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

ON INTERNAL CONTROL OVER FINANCIAL REPORTING

The report called for by Item 308(b) of Regulation S-K is incorporated herein by reference to the Report of Independent Registered Public Accounting Firm on Internal Control Over Financial Reporting that is included in Part II, Item 9A of this report.

42

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors and Stockholders of Semtech Corporation

We have audited the accompanying consolidated balance sheets of Semtech Corporation and subsidiaries as of January 27, 2013 and January 29, 2012, and the related consolidated statements of income, comprehensive income, stockholders' equity and cash flows for each of the three years in the period ended January 27, 2013. Our audits also included the financial statement schedule listed in the Index at Item 15(a). These financial statements and schedule are the responsibility of the Company's management. Our responsibility is to express an opinion on these financial statements and schedule based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated financial position of Semtech Corporation and subsidiaries at January 27, 2013 and January 29, 2012, and the consolidated results of their operations and their cash flows for each of the three years in the period ended January 27, 2013, in conformity with U.S. generally accepted accounting principles. Also, in our opinion, the related financial statement schedule, when considered in relation to the basic financial statements taken as a whole, presents fairly in all material respects the information set forth therein.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), Semtech Corporation and subsidiaries' internal control over financial reporting as of January 27, 2013, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated March 28, 2013 expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP

Los Angeles, California

March 28, 2013

43

SEMTECH CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF INCOME

(in thousands, except earnings per share)

	Fiscal Year Ended
	January 27, 2013			January 29, 2012		January 30, 2011
Net sales	$	578,827		$	480,601	$	454,502
Cost of sales	264,215			194,956		186,196
Gross profit	314,612			285,645		268,306
Operating costs and expenses:
Selling, general and administrative	149,070			100,629		110,404
Product development and engineering	120,009			80,577		69,624
Intangible amortization and impairments	29,944			10,853		9,520
Total operating costs and expenses	299,023			192,059		189,548
Operating income	15,589			93,586		78,758
Interest expense	(14,363		)	—		—
Interest income and other (expense) income, net	(977		)	593		574
Income before taxes	249			94,179		79,332
(Benefit) provision for taxes	(41,690		)	5,092		6,760
Net income	$	41,939		$	89,087	$	72,572
Earnings per share:
Basic	$	0.64		$	1.37	$	1.16
Diluted	$	0.62		$	1.32	$	1.12
Weighted average number of shares used in computing earnings per share:
Basic	65,809			65,099		62,339
Diluted	67,472			67,350		64,523

See accompanying notes. The accompanying notes are an integral part of these statements.

44

SEMTECH CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(in thousands)

	Fiscal Year Ended
	January 27, 2013			January 29, 2012			January 30, 2011
Net income	$	41,939		$	89,087		$	72,572
Other comprehensive (loss) income, before tax:
Change in net unrealized holding loss on available-for-sale investments	(42		)	(262		)	(117		)
Change in unrealized loss on interest rate cap	(556		)	—			—
Change in cumulative translation adjustment	203			(4		)	1
Other comprehensive loss, before tax	(395		)	(266		)	(116		)
Benefit for taxes related to items of other comprehensive (loss) income	213			58			41
Other comprehensive loss, net of tax	(182		)	(208		)	(75		)
Total comprehensive income, net of tax	$	41,757		$	88,879		$	72,497

See accompanying notes. The accompanying notes are an integral part of these statements.

45

SEMTECH CORPORATION AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

AS OF JANUARY 27, 2013 AND JANUARY 29, 2012

(in thousands, except share data)

	January 27, 2013			January 29, 2012
Assets
Current assets:
Cash and cash equivalents	$	223,192		$	227,022
Temporary investments	4,973			83,121
Accounts receivable, less allowances of $4,917 at January 27, 2013 and $3,594 at January 29, 2012	69,160			49,644
Inventories	74,878			46,995
Deferred tax assets	7,473			5,339
Prepaid taxes	7,794			9,580
Other current assets	18,523			5,611
Total current assets	405,993			427,312
Non-current assets:
Property, plant and equipment, net of accumulated depreciation of $101,766at January 27, 2013 and $85,393 at January 29, 2012	101,837			69,713
Long-term investments	7,907			17,522
Deferred income taxes	33,563			—
Goodwill	393,584			129,651
Other intangible assets, net	206,058			66,720
Other assets	22,071			15,403
TOTAL ASSETS	$	1,171,013		$	726,321
Liabilities and Stockholders’ Equity
Current liabilities:
Accounts payable	$	51,991		$	26,699
Accrued liabilities	49,276			32,389
Deferred revenue	3,745			3,853
Current portion - long term debt	48,449			—
Deferred tax liabilities	4,221			4,041
Total current liabilities	157,682			66,982
Non-current liabilities:
Deferred tax liabilities	2,042			1,000
Long term debt, less current	282,286			—
Other long-term liabilities	34,177			28,151
Stockholders’ equity:
Common stock, $0.01 par value, 250,000,000 shares authorized, 78,136,144 issued and 66,607,347 outstanding on January 27, 2013 and 78,136,144 issued and 64,964,780 outstanding on January 29, 2012	785			785
Treasury stock, at cost, 11,528,797 shares as of January 27, 2013 and 13,171,364 shares as of January 29, 2012	(200,604		)	(225,822		)
Additional paid-in capital	355,990			358,327
Retained earnings	538,302			496,363
Accumulated other comprehensive income	353			535
Total stockholders’ equity	694,826			630,188
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$	1,171,013		$	726,321

See accompanying notes. The accompanying notes are an integral part of these statements.

46

SEMTECH CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(in thousands, except share amounts)

	Common Stock												Accumulated Other
	Number of Shares Outstanding		Amount		Additional Paid-in Capital			Retained Earnings		Treasury Stock, at Cost			Comprehensive Income (Loss)			Stockholders’ Equity
Balance at January 31, 2010	61,261,015		$	784	$	348,741		$	334,704	$	(279,306	)	$	818		$	405,741
Net income	—		—		—			72,572		—			—			72,572
Other comprehensive (loss)	—		—		—			—		—			(75		)	(75		)
Stock-based compensation	—		—		24,204			—		—			—			24,204
Repurchase of outstanding common stock	(164,636	)	—		—			—		(2,819		)	—			(2,819		)
Treasury stock reissued	2,825,111		—		(19,169		)	—		49,858			—			30,689
Shares issued under equity award plans	6,250		1		—			—		—			—			1
Tax shortfall from stock based compensation	—		—		(1,698		)	—		—			—			(1,698		)
Balance at January 30, 2011	63,927,740		$	785	$	352,078		$	407,276	$	(232,267	)	$	743		$	528,615
Net income	—		—		—			89,087		—			—			89,087
Other comprehensive (loss)	—		—		—			—		—			(208		)	(208		)
Stock-based compensation	—		—		19,068			—		—			—			19,068
Repurchase of outstanding common stock	(2,279,526	)	—		—			—		(50,665		)	—			(50,665		)
Treasury stock reissued	3,316,566		—		(15,264		)	—		57,110			—			41,846
Shares issued under equity award plans	—				—			—		—			—			—
Excess tax benefits from stock based compensation	—		—		2,445			—		—			—			2,445
Balance at January 29, 2012	64,964,780		$	785	$	358,327		$	496,363	$	(225,822	)	$	535		$	630,188
Net income	—		—		—			41,939		—			—			41,939
Other comprehensive (loss)	—		—		—			—		—			(182		)	(182		)
Stock-based compensation	—		—		21,382			—		—			—			21,382
Repurchase of outstanding common stock	(273,139	)	—		—			—		(7,769		)	—			(7,769		)
Treasury stock reissued	1,915,706		—		(20,184		)	—		32,987			—			12,803
Shares issued under equity award plans	—				—			—		—			—			—
Tax shortfall from stock based compensation	—		—		(3,535		)	—		—			—			(3,535		)
Balance at January 27, 2013	66,607,347		$	785	$	355,990		$	538,302	$	(200,604	)	$	353		$	694,826

See accompanying notes. The accompanying notes are an integral part of these statements.

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SEMTECH CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

	Fiscal Year Ended
	January 27, 2013			January 29, 2012			January 30, 2011
Cash flows from operating activities:
Net income	$	41,939		$	89,087		$	72,572
Adjustments to reconcile net income to net cash provided by operating activities, net of effects of acquisitions:
Depreciation, amortization and impairments	49,192			21,013			16,448
Effect of acquisition fair value adjustments	37,693			—			—
Accretion of deferred financing costs and debt discount	2,545			—			—
Deferred income taxes	(47,623		)	(2,023		)	3,184
Stock-based compensation	24,528			24,020			29,010
Excess tax benefits on stock based compensation	—			(2,279		)	(891		)
Loss on disposition of property, plant and equipment	85			1,022			69
Changes in assets and liabilities:
Accounts receivable, net	(5,002		)	966			(19,447		)
Inventories	(4,251		)	676			(14,016		)
Prepaid expenses and other assets	5,971			(7,068		)	(540		)
Accounts payable	4,453			(3,354		)	5,986
Accrued liabilities	(10,410		)	(26,017		)	13,434
Deferred revenue	(1,112		)	(1,167		)	1,744
Income taxes payable and prepaid taxes	(1,120		)	4,962			(16,702		)
Other liabilities	5,080			(6		)	2,950
Net cash provided by operating activities	101,968			99,832			93,801
Cash flows from investing activities:
Purchases of available-for-sale investments	(24,744		)	(93,330		)	(168,802		)
Proceeds from sales and maturities of available-for-sale investments	112,466			131,748			110,987
Proceeds from sales of property, plant and equipment	—			46			76
Purchase of property, plant and equipment	(23,266		)	(21,564		)	(25,537		)
Purchase of intangible assets	(1,251		)	(3,000		)	—
Purchase of cost method investment	(2,500		)	—			—
Acquisitions, net of cash acquired	(491,717		)	—			—
Net cash (used in) provided by investing activities	(431,012		)	13,900			(83,276		)
Cash flows from financing activities:
Proceeds from debt issuance, net of discount	347,000			—			—
Deferred financing cost	(8,962		)	—			—
Payment for interest rate cap	(1,100		)	—			—
Excess tax benefits on stock based compensation	—			2,279			891
Proceeds from exercises of stock options	12,855			42,661			29,823
Repurchase of outstanding common stock	(7,769		)	(50,665		)	(2,819		)
Payment of long term debt	(16,875		)	—			—
Net cash provided by (used in) financing activities	325,149			(5,725		)	27,895
Effect of exchange rate increase (decrease) on cash and cash equivalents	65			(4		)	1
Net (decrease) increase in cash and cash equivalents	(3,830		)	108,003			38,421
Cash and cash equivalents at beginning of period	227,022			119,019			80,598
Cash and cash equivalents at end of period	$	223,192		$	227,022		$	119,019
Supplemental disclosure of cash flow information
Income taxes paid	$	5,029		$	4,059		$	20,566
Interest paid	$	10,556		$	—		$	—

See accompanying notes. The accompanying notes are an integral part of these statements.

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SEMTECH CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Note 1: Organization and Basis of Presentation

Semtech Corporation (together with its subsidiaries, the “Company” or “Semtech”) is a global supplier of analog and mixed-signal semiconductor products. The end-customers for the Company’s products are primarily original equipment manufacturers (“OEM’s”) that produce and sell electronics.

The Company designs, develops and markets a wide range of products for commercial applications, the majority of which are sold into the enterprise computing, communications, high-end consumer and industrial end-markets.

Enterprise Computing: datacenters, passive optical networks, optical receiver and transceiver, desktops, notebooks, servers, graphic boards, monitors, printers and other computer peripherals.

Communications: base stations, backplane, optical networks, carrier networks, switches and routers, servers, cable modems, signal conditioners, wireless LAN and other communication infrastructure equipment.

High-End Consumer: handheld products, set-top boxes, digital televisions, tablet computers, digital video recorders, thunderbolt and fiberless high-speed interfaces and other consumer equipment.

Industrial: broadcast studio equipment, automated meter reading, military and aerospace, medical, security systems, automotive, industrial and home automation, video security and surveillance and other industrial equipment.

Fiscal Year

The Company reports results on the basis of 52 and 53 week periods and ends its fiscal year on the last Sunday in January. The fiscal years ended January 27, 2013, January 29, 2012 and January 30, 2011 each consisted of 52 weeks.

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of Semtech Corporation and its wholly owned subsidiaries. All inter-company transactions and accounts have been eliminated.

In March 2012, the Company completed the acquisitions of Gennum Corporation (“Gennum”) and Cycleo SAS (“Cycleo”). The consolidated financial statements include the results of operations of Gennum and Cycleo commencing as of the acquisition dates. See Note 3 for further discussion.

Segment Information

The Company operates and accounts for its results in one reportable segment. The Company identified five operating segments which aggregate into one reportable segment.The Company designs, develops, manufactures and markets high performance analog and mixed signal integrated circuits. The Chief Executive Officer has been identified as the Chief Operating Decision Maker as defined by guidance regarding segment disclosures. The Company has evaluated its reportable segments subsequent to its acquisition of Gennum and concluded that it continues to operate and account for its results in one reportable segment.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Reclassification

Certain prior period immaterial amounts have been reclassified to conform with current period presentation.

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Note 2: Significant Accounting Policies

Cash, Cash Equivalents and Investments

The Company considers all highly liquid investments with an original maturity of 90 days or less to be cash equivalents. The Company maintains cash balances and investments in highly qualified financial institutions. At various times such amounts are in excess of insured limits. Investments consist of government and corporate obligations and bank time deposits. The Company’s investment policy restricts investments to high credit quality investments with limits on the length to maturity and the amount invested with any one issuer. These investments, especially corporate obligations, are subject to default risk. The Company designates its investments as available for sale (“AFS”). Investments designated as AFS are reported at fair value. The Company records the unrealized gains and losses, net of tax, in stockholders’ equity as a component of comprehensive income. Realized gains or losses are recorded in “Interest income and other expense, net” in the consolidated statements of income.

Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable are recorded at net realizable value or the amount that the Company expects to collect on gross customer trade receivables. The Company evaluates the collectability of its accounts receivable based on a combination of factors. The Company generally does not require collateral on accounts receivable as the majority of the Company’s customers are large, well-established companies. Historically, bad debt provisions have been consistent with management’s expectations. If the Company becomes aware of a customer’s inability to meet its financial obligations after a sale has occurred, it records an allowance to reduce the net receivable to the amount it reasonably believes it will be able to collect from the customer. For all other customers, the Company recognizes allowances for doubtful accounts based on the length of time the receivables are past due, the current business environment and historical experience. If the financial condition of the Company’s customers were to deteriorate or if economic conditions worsen, additional allowances may be required in the future. All of the Company’s accounts receivables are trade-related receivables. See Note 16 for a discussion of concentration risks.

Inventories

Inventories are stated at lower of cost or market and consist of materials, labor and overhead. The Company determines the cost of inventory by the first-in, first-out method. The Company evaluates inventories for excess quantities and obsolescence. This evaluation includes analyses of sales levels by product and projections of future demand. In order to state the inventory at lower of cost or market, the Company maintains reserves against its inventory. If future demand or market conditions are less favorable than the Company’s projections, a write-down of inventory may be required, and would be reflected in cost of goods sold in the period the revision is made.

Business Combinations

The Company accounts for business combinations at fair value. Goodwill is measured as the excess of consideration transferred over the acquisition date net fair values of the assets acquired and the liabilities assumed. All changes that do not qualify as measurement period adjustments are included in current period earnings. Significant judgment is required to determine the estimated fair value for assets and liabilities acquired and to assigning their respective useful lives. The fair values assigned to tangible and intangible assets acquired and liabilities assumed, including contingent consideration, are based on management’s estimates and assumptions, as well as other information compiled by management, including available historical information and valuations that utilize customary valuation procedures and techniques.

The Company employs the income approach to estimate the fair value of intangible assets, which is based on forecasts of the expected future cash flows attributable to the respective assets. The fair value of acquired in-process research and development projects (“IPR&D”) was determined using an income approach or replacement cost approach as applicable. The replacement cost approach was used for IPR&D projects that were considered long-term core investments and were not anticipated to be profitable for a period of time. IPR&D projects which were valued using an income approach, measured the returns attributable to each specific IPR&D project, discounted to present value using a risk-adjusted rate of return, including as appropriate, any tax benefits derived from amortizing the intangible assets for tax purposes. Significant estimates and assumptions inherent in the valuations reflect consideration of other marketplace participants, and include the amount and timing of future cash flows (including expected growth rates and profitability), the underlying product life cycles, economic barriers to entry, a brand’s relative market position and the discount rate applied to the cash flows, among others.

If actual results differ from the estimates and judgments used in these estimates, the amounts recorded in the financial statements could result in a possible impairment of the intangible assets and goodwill, or require acceleration of the amortization expense of finite-lived intangible assets.

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Property, Plant and Equipment

Property, plant and equipment are stated at cost. The Company’s cost basis includes certain assets acquired in business combinations that were initially recorded at fair value as of the date of acquisition. Depreciation is computed over the estimated useful lives of the related asset type or term of the operating lease using the straight-line method for financial statement purposes. Maintenance and repairs are charged to expense as incurred and the costs of additions and betterments that increase the useful lives of the assets are capitalized.

The estimated service lives for property and equipment is as follows:

	Estimated
	Useful Lives
Buildings and leasehold improvements	7 to 39 years
Machinery and equipment	5 to 8 years
Transportation vehicles	5 years
Furniture and fixtures	7 years
Computers and computer software	3 years

Impairment of Goodwill, Other Intangible and Long-Lived Assets

Goodwill

Goodwill is the excess of the purchase price over the fair value of identifiable net assets acquired in business combinations accounted for under the purchase method. Goodwill is not amortized but is tested for impairment using a two-step method on an annual basis in the fourth quarter or whenever events or changes in circumstances indicate that the carrying value may not be recoverable. These indicators would include a significant change in operating performance, the business climate, legal factors, competition, or a planned sale or disposition of a significant portion of the business among other factors.

The recoverability of goodwill is measured at the reporting unit level by comparing the reporting unit’s carrying amount, including goodwill, to the fair market value of the reporting unit. A reporting unit is an operating segment or a business unit one level below that operating segment, and it is the level at which management regularly reviews operating results and makes resource allocation decisions.

Step one is the identification of potential impairment. This involves comparing the fair value of each reporting unit with its carrying amount, including goodwill. If the fair value of a reporting unit exceeds the carrying amount, the goodwill of the reporting unit is considered not impaired and the second step of the impairment test is unnecessary. If the carrying amount of a reporting unit exceeds its fair value, the second step of the impairment test is performed to measure the amount of impairment loss, if any.

Step two is the measurement of the amount of impairment loss. This involves comparison of the implied fair value of the reporting unit goodwill with the carrying amount of that goodwill. If the carrying amount of the reporting unit goodwill exceeds the implied fair value of that goodwill, an impairment loss would be recognized in an amount equal to that excess. The loss recognized cannot exceed the carrying amount of the goodwill. Once a goodwill impairment loss is recognized, the adjusted carrying amount becomes the accounting basis.

The fair value of goodwill is tested for impairment on a non-recurring basis in the accompanying consolidated financial statements using Level 3 inputs. The Company’s estimate of fair value was primarily determined using the income approach methodology of valuation that includes the discounted cash flow method as well as other generally accepted valuation methodologies to determine the fair value of the assets. Changes in economic and operating conditions that occur after the annual impairment analysis or an interim impairment analysis that impact these assumptions may result in a future goodwill impairment charge.

Other Intangibles and Long-lived Assets

Finite-lived intangible assets resulting from business acquisitions or technology licenses purchased are amortized on a straight-line basis over their estimated useful lives. The useful lives of acquisition-related intangible assets represent the point where over 90% of realizable undiscounted cash flows for each intangible asset are recognized. The assigned useful lives are consistent with the Company’s historical experience with similar technology and other intangible assets owned by the Company. The useful life of technology licenses is usually based on the term of the agreement.

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In-process research and development is recorded at fair value as of the date of acquisition as an indefinite-lived intangible asset until the completion or abandonment of the associated research and development efforts or impairment. Upon completion of development, acquired in-process research and development assets are transferred to finite-lived intangible assets and amortized over their useful lives.

The Company reviews indefinite-lived intangible assets for impairment on an annual basis in conjunction with goodwill or whenever events or changes in circumstances indicate the carrying value may not be recoverable. Recoverability of indefinite-lived intangible assets is measured by comparing the carrying amount of the asset to the future discounted cash flows the asset is expected to generate.

Fair Value Measurements

When determining the fair value measurements for assets and liabilities required or permitted to be recorded at fair value, the Company considers the principal or most advantageous market in which it would transact and considers assumptions that market participants would use when pricing the asset or liability, such as inherent risk, transfer restrictions, and risk of nonperformance. The Company uses the following three levels of inputs in determining the fair value of the Company’s assets and liabilities, focusing on the most observable inputs when available:

Level 1 - Quoted prices in active markets for identical assets or liabilities.

Level 2 - Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets with insufficient volume or infrequent transactions (less active markets); or model-derived valuations in which all significant inputs are observable or can be derived principally from or corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3 - Unobservable inputs to the valuation methodology that are significant to the measurement of fair value of assets or liabilities.

To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes, the level in the fair value hierarchy within which the fair value measurement is disclosed is determined based on the lowest level input that is significant to the fair value measurement.

Interest Rate Derivative

The Company incurs interest expense through its variable rate debt. To manage its interest rate risk, the Company occasionally hedges the future cash flows of its variable rate debt, principally through interest rate contracts with major financial institutions. Interest rate contracts that meet specific criteria are accounted for as cash flow hedges.

The Company’s objective in using interest rate contracts is to add stability to interest expense and to manage its exposure to interest rate movements. To accomplish this objective, the Company uses interest rate contracts as part of its interest rate risk management strategy. Interest rate cap contracts involve the receipts of variable amounts from a counterparty when one-month LIBOR exceeds the capped interest rate in exchange for an upfront payment from the Company, capping the Company’s one-month LIBOR floating interest payments at the strike rate on its interest rate cap contract.

The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive income and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. The upfront payment the Company paid for the interest rate cap agreement will be amortized out of accumulated other comprehensive income and recorded as interest expense according to the amortization schedule created at inception of the hedging relationship. The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings. The Company records derivative instruments in the statements of cash flows to operating, investing, or financing activities consistent with the cash flows of the hedged item.

The assessment of effectiveness is based on the total changes in an option’s cash flows such that the assessment will include the interest rate caps entire change in fair value. The interest rate cap is considered a highly effective hedge since the key features and terms match with the hedged item at inception. Key features and terms are notional amount, cap effective date, rate threshold, index, repricing dates, payments dates, and maturity dates.

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Revenue Recognition

The Company recognizes product revenue when persuasive evidence of an arrangement exists, delivery has occurred, the fee is fixed or determinable and collectability is probable. Recovery of costs associated with product design and engineering services are recognized during the period in which services are performed. The product design and engineering recovery, when recognized, will be reported as a reduction to product development and engineering expense. Historically, these recoveries have not exceeded the cost of the related development efforts.

The Company includes revenue related to granted technology licenses as part of “Net sales.” Historically, revenue from these arrangements has not been significant though it is part of its recurring ordinary business. In the third quarter of fiscal year 2013, the Company entered into a single licensing arrangement that resulted in the recognition of $7.5 million of revenue.

The Company defers revenue recognition on shipment of products to certain customers, principally distributors, under agreements which provide for limited pricing credits or return privileges, until these products are sold through to end-users or the return privileges lapse. For sales subject to certain pricing credits or return privileges, the amount of future pricing credits or inventory returns cannot be reasonably estimated given the relatively long period in which a particular product may be held by the customer. Therefore, the Company has concluded that sales to customers under these agreements are not fixed and determinable at the date of the sale and revenue recognition has been deferred. The Company estimates the deferred gross margin on these sales by applying an average gross profit margin to the actual gross sales. The average gross profit margin is calculated for each category of material using standard costs which is expected to approximate actual costs at the date of sale. The estimated deferred gross margins on these sales, where there are no outstanding receivables, are recorded on the consolidated balance sheets under the heading of “Deferred revenue.”

The Company records a provision for estimated sales returns in the same period as the related revenues are recorded. The Company bases these estimates on historical sales returns and other known factors. Actual returns could be different from Company estimates and current provisions for sales returns and allowances, resulting in future charges to earnings. There were no significant impairments of deferred cost of sales in fiscal year 2013 or fiscal year 2012.

The following table summarizes the deferred revenue balance:

(in thousands)	January 27, 2013		January 29, 2012
Deferred revenues	$	4,467	$	4,964
Deferred cost of revenues	1,099		1,243
Deferred revenue, net	3,368		3,721
Deferred product design and engineering recoveries	377		132
Total deferred revenue	$	3,745	$	3,853

Cost of Sales

Cost of sales includes materials, depreciation on fixed assets used in the manufacturing process, shipping costs, direct labor and overhead.

Sales and Marketing

The Company expenses sales and marketing costs, which include advertising costs, as they are incurred. Advertising costs were $119,000, $285,000 and $232,000 for fiscal years 2013, 2012 and 2011, respectively.

Product Development and Engineering

Product development and engineering costs are charged to expense as incurred. Recoveries from nonrecurring engineering services are recorded as an offset to product development expense incurred in support of this effort since these activities do not represent an earnings process core to the Company’s business and serve as a mechanism to partially recover development expenditures.

The Company received approximately $12.5 million, $5.7 million and $11.7 million in fiscal years 2013, 2012 and 2011, respectively for nonrecurring engineering services.

Income Taxes

The Company accounts for income taxes using the asset and liability method. Under this method, deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement

53

carrying amounts and their respective tax bases. The consolidated balance sheets include current and long term prepaid taxes under “Prepaid taxes” and “Other assets” and current and long term liabilities for uncertain tax positions under “Accrued liabilities” and “Other long-term liabilities.”

As part of the process of preparing the Company’s consolidated financial statements, the Company estimates income taxes in each of the jurisdictions in which it operates. This process involves estimating the current tax liability together with assessing temporary differences resulting from differing treatment of items for tax and accounting purposes. These differences result in deferred tax assets and liabilities. The Company must assess the likelihood that its deferred tax assets will be recovered from future taxable income and, to the extent the Company believes that recovery is not likely, it must establish a valuation allowance. To the extent the Company changes its valuation allowance in a period; the change is generally recorded through the tax provision on the consolidated statements of income.

The income tax effects of share-based payments are recognized for financial reporting purposes only if such awards are expected to result in a tax deduction. The Company does not recognize a deferred tax asset for an excess tax benefit (that is, a tax benefit that exceeds the tax benefit for the amount of compensation cost recognized for the award for financial reporting purposes) that has not been realized. In determining when an excess tax benefit is realized, the Company has elected to follow the ordering provision of the tax law.

For intra-entity differences between the tax basis of an asset in the buyer’s tax jurisdiction and their cost as reported in the consolidated financial statements, the Company does not recognize a deferred tax asset. Income taxes paid on intra-entity profits on assets remaining within the group are accounted for as prepaid taxes. See Note 14 for further discussion of income taxes.

Accumulated Other Comprehensive Income

Other comprehensive income includes unrealized gains and losses on available-for-sale investments, unrealized loss on interest rate hedging activities and foreign currency translation adjustments, net of tax. This information is provided in our consolidated statements of comprehensive Income. Accumulated other comprehensive income balances were as follows:

(in thousands)	Unrealized holding gain (loss) on available-for-sale investments (1)			Unrealized loss on interest rate hedge			Cumulative translation adjustment			Accumulated other comprehensive income
Balance at January 31, 2010	$	317		$	—		$	501		$	818
Current-period other comprehensive (loss) income	(76		)	—			1			(75		)
Balance at January 30, 2011	241			—			502			743
Current-period other comprehensive loss	(204		)	—			(4		)	(208		)
Balance as of January 29, 2012	37			—			498			535
Current-period other comprehensive (loss) income	(32		)	(353		)	203			(182		)
Balance as of January 27, 2013	$	5		$	(353	)	$	701		$	353

(1) Net of reclassification adjustments for gains realized, net of tax from other comprehensive income to net income $1 and $5 for the fiscal years 2013 and 2012, respectively. There were no reclassification adjustments for gains realized in fiscal year 2011.

Translation

The assets and liabilities of the Company’s foreign subsidiaries that operate in a local currency environment, where that local currency is the functional currency, are translated to the U.S. dollar using exchange rates in effect at the balance sheet date. Income statement items are translated at average exchange rates prevailing during the period. The translation gains or losses are included as a component of accumulated other comprehensive income in the accompanying consolidated financial statements.

Transaction gains and losses resulting from the re-measurement or settlement of assets and liabilities denominated in foreign currencies are included in the determination of net income and have not been significant.

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Stock-Based Compensation

The Company has various equity award plans (“Plans”) that provide for granting stock based awards to employees and non-employee directors of the Company. The Plans provide for the granting of several available forms of stock compensation. As of January 27, 2013, the Company has granted stock option awards (“Options”) and restricted stock unit awards (“RSU”) under the Plans and has also issued some stock-based compensation outside of any plan, including options and restricted stock awards issued as inducements to join the Company.

Earnings per Share

The computation of basic and diluted earnings per common share was as follows:

	Fiscal Year Ended
(in thousands, except per share amounts)	January 27, 2013		January 29, 2012		January 30, 2011
Net income	$	41,939	$	89,087	$	72,572
Weighted average common shares outstanding - basic	65,809		65,099		62,339
Dilutive effect of employee equity incentive plans	1,663		2,251		2,184
Weighted average common shares outstanding - diluted	67,472		67,350		64,523
Basic earnings per common share	$	0.64	$	1.37	$	1.16
Diluted earnings per common share	$	0.62	$	1.32	$	1.12
Anti-dilutive shares not included in the above calculations	783		625		1,700

Basic earnings per common share is computed by dividing income available to common shareholders by the weighted-average number of shares of common stock outstanding during the reporting period. Diluted earnings per common share incorporates the incremental shares issuable, calculated using the treasury stock method, upon the assumed exercise of stock options and the vesting of restricted stock.

Contingencies

The Company accrues an undiscounted liability for contingencies where the incurrence of a loss is probable and the amount can be reasonably estimated, and the Company discloses the amount accrued and the amount of a reasonably possible loss in excess of the amount accrued, if such disclosure is necessary for our financial statements not to be misleading. The Company does not record liabilities when the likelihood that the liability has been incurred is probable but the amount cannot be reasonably estimated, or when the liability is believed to be only reasonably possible or remote.

Because litigation outcomes are inherently unpredictable, the Company’s evaluation of legal proceedings often involves a series of complex assessments by management about future events and can rely heavily on estimates and assumptions. If the assessments indicate that loss contingencies that could be material to any one of our financial statements are not probable, but are reasonably possible, or are probable, but cannot be estimated, then the Company discloses the nature of the loss contingencies, together with an estimate of the range of possible loss or a statement that such loss is not reasonably estimable.

Subsequent Events

The Company evaluates all events through the issuance date of the consolidated financial statements to determine whether any subsequent events have occurred that require recognition or disclosure.

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Note 3: Acquisitions

Gennum Corporation (“Gennum”)

On March 20, 2012, the Company, through its wholly-owned subsidiary Semtech Canada Inc., completed the acquisition of all outstanding equity interests of Gennum (TSX: GND), a leading supplier of high speed analog and mixed-signal semiconductors for the optical communications and video broadcast markets.

Upon consummation of the business acquisition, which constituted a change in control of Gennum, Gennum’s stock option awards and restricted shares became fully vested. Semtech acquired 100% of the outstanding shares and vested stock options, restricted shares, and deferred share units of Gennum for CDN $13.55 per share for a total purchase price of $506.5 million. The acquisition was financed with a combination of cash from Semtech’s international cash reserves and $347 million of five-year secured term loans, net of original issuance debt discount of $3 million (see Note 10).

The Gennum assets acquired and liabilities assumed are recorded at their acquisition-date fair values. Acquisition-related transaction costs are not included as a component of consideration transferred, but are accounted for as an expense in the period in which the costs are incurred. Any excess of the acquisition consideration over the fair value of assets acquired and liabilities assumed is allocated to goodwill. The goodwill resulted from expected synergies from the transaction, including complementary products that will enhance the Company’s overall product portfolio, and opportunities within new markets, and is not deductible for tax purposes. The acquired in-process research and development is recorded at fair value as an indefinite-lived intangible asset at the acquisition date until the completion or abandonment of the associated research and development efforts.

In connection with the acquisition, certain Gennum employees became entitled to payments upon a change in control and their subsequent termination. These payments, which totaled approximately $9.6 million, have been recognized as a post-acquisition compensation expense and included in the consolidated statements of income for fiscal year 2013 under “Selling, general and administrative.”

The Company’s allocation of the total purchase price as of March 20, 2012 is summarized below:

(in thousands)	At March 20, 2012
Cash	$	19,664
Accounts receivable, less allowances	14,032
Inventories	62,941
Prepaid expenses	3,832
Income taxes receivable	1,467
Deferred tax assets - current	8,590
Other current assets	7,804
Property, plant and equipment	25,702
Amortizable intangible assets	129,863
In-process research and development	29,100
Goodwill	261,891
Deferred tax assets - non-current	31,235
Other non-current assets	8
Deferred tax liabilities	(47,077		)
Accounts payable	(18,232		)
Accrued liabilities	(24,274		)
Total acquisition consideration	$	506,546
(in thousands)	At March 20, 2012
Amortizable intangible assets:
Developed technology	$	95,100
Customer relationships	28,000
Other intangible assets	6,763
	$	129,863

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Primarily due to a change in the preliminary allocation of fair value with regard to deferred tax assets and liabilities, the preliminary goodwill allocation related to Gennum decreased by $0.9 million from $262.8 million as of October 28, 2012 to $261.9 million as of January 27, 2013. There was no impact to the Company’s consolidated statements of income for fiscal year 2013.

As of January 27, 2013, the Company has completed the purchase price allocation for its acquisition of Gennum.

The Company recognized approximately $11.4 million of transaction and integration expenses and $13.4 million severance costs associated with the Gennum acquisition in fiscal year 2013. These costs are included in the consolidated statements of income under “Selling, general and administrative.”

Net revenues attributable to Gennum since the acquisition date were $129.6 million, with a corresponding net loss of $36.5 million in fiscal year 2013.

In May 2012, the Company settled two pre-acquisition contingencies related to legal matters that were included in the purchase price allocation for a total cash payment of $4.2 million.

Pro Forma Financial Information

The results of operations of Gennum have been included in the Company’s consolidated statements of income since the acquisition date of March 20, 2012. The following table reflects the unaudited consolidated pro forma information as if the acquisition had taken place at the beginning of each period presented, after giving effect to certain adjustments including the following for fiscal years 2013 and 2012:

• increase in cost of goods sold associated with the fair value adjustment related to acquired inventory of $41.8 million for fiscal year 2012 and subsequent decrease of $39.4 million for fiscal year 2013;

• decrease in operating expense as a result of classifying recoveries of cost associated with product design and engineering services as a reduction to product development and engineering expense of $12.9 million for fiscal year 2012;

• increase in operating expense as a result of the settlement of two pre-acquisition contingencies related to legal matters of $4.2 million for fiscal year 2013;

• increase in amortization expense as a result of acquired intangible assets of $22.8 million for fiscal year 2012 and a subsequent decrease of $1.6 million for fiscal year 2013;

• increase in benefit for taxes of $23.4 million associated with the releasing of prior accrued taxes on foreign earnings for fiscal year 2012 and subsequent decrease for fiscal year 2013;

• increase in interest expense of $16.6 million associated with the $350 million term loans entered into to finance the acquisition for fiscal year 2012 and $1.7 million for fiscal year 2013; and

• the related tax effects.

Unaudited Consolidated Pro forma Information:

	Fiscal Year Ended
	January 27, 2013		January 29, 2012
(in thousands)	(unaudited)		(unaudited)
Revenue	$	603,067	$	604,906
Net income	$	56,980	$	66,377

The unaudited pro forma information presented does not purport to be indicative of the results that would have been achieved had the acquisition been consummated at the beginning of each period presented nor of the results which may occur in the future. The pro forma adjustments are based upon available information and certain assumptions that the Company believes are reasonable. The unaudited pro forma information does not include any adjustments for any restructuring activities, operating efficiencies or cost savings.

Cycleo SAS

On March 7, 2012, the Company completed the acquisition of Cycleo, a privately held company based in France that develops intellectual property (“IP”) for wireless long-range semiconductor products used in smart metering and other industrial and consumer markets. Under the terms of the agreement, Semtech paid the stockholders of Cycleo $5 million in cash at closing.

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Total acquisition consideration is allocated to the acquired tangible and intangible assets and assumed liabilities of Cycleo based on their respective estimated fair values as of the acquisition date. Any excess of the acquisition consideration over the fair value of assets acquired and liabilities assumed is allocated to goodwill. The Company expects that all such goodwill will not be deductible for tax purposes.

As of January 27, 2013, the Company completed the purchase price allocation for its acquisition of Cycleo.

Additionally, pursuant to the earn-out arrangement with Cycleo stockholders, the Company potentially may make payments totaling up to approximately $16 million based on the achievement of a combination of certain revenue and operating income milestones by Cycleo over the period of four years beginning on April 30, 2012. For certain of the Cycleo stockholders, payment of the earn-out liability is contingent upon employment on the payout date and is accounted for as post-acquisition compensation expense over the service period. The portion of the earn-out liability that is not dependent on continued employment is included in the purchase price allocation at March 7, 2012.

Net revenues and earnings attributable to Cycleo since the acquisition date were not material. Pro forma results of operations have not been presented as the acquisition was not material to the Company’s consolidated financial statements.

Note 4: Investments

Investments that have original maturities of three months or less are accounted for as cash equivalents. This includes money market funds, time deposits and U.S. government obligations. Temporary and long-term investments consist of government, bank and corporate obligations, and bank time deposits with original maturity dates in excess of three months. Temporary investments have original maturities in excess of three months, but mature within twelve months of the balance sheet date. Long-term investments have original maturities in excess of twelve months. The Company determines the cost of securities sold based on the specific identification method. Realized gains or losses are reported in “Interest income and other expense, net” on the consolidated statements of income.

The Company classifies its investments as “available for sale” because it may sell some securities prior to maturity. The Company’s investments are subject to market risk, primarily interest rate and credit risks. The Company’s investments are managed by a limited number of outside professional managers that operate within investment guidelines set by the Company. These guidelines include specified permissible investments, minimum credit quality ratings and maximum average duration restrictions and are intended to limit market risk by restricting the Company’s investments to high quality debt instruments with relatively short-term maturities.

As of January 27, 2013, all of the Company’s long-term investments mature on various dates through fiscal year 2015.

The following table summarizes the Company’s available for sale investments:

	January 27, 2013						January 29, 2012
(in thousands)	Market Value		Adjusted Cost		Gross Unrealized Gain		Market Value		Adjusted Cost		Gross Unrealized Gain
Agency securities	$	7,907	$	7,900	$	7	$	26,132	$	26,110	$	22
Corporate issues	—		—		—		4,511		4,484		27
Bank time deposits	4,973		4,973		—		70,000		70,000		—
Total investments	$	12,880	$	12,873	$	7	$	100,643	$	100,594	$	49

Agency securities are specific securities that are issued by United States government agencies such as Ginnie Mae, Fannie Mae, Freddie Mac or the Federal Home Loan Banks. Due to the expectation of federal backing, these securities usually hold the highest credit rating possible.

The following table summarizes the maturities of the Company’s available for sale investments:

	January 27, 2013				January 29, 2012
(in thousands)	Market Value		Adjusted Cost		Market Value		Adjusted Cost
Within 1 year	$	4,973	$	4,973	$	83,121	$	83,085
After 1 year through 5 years	7,907		7,900		17,522		17,509
Total investments	$	12,880	$	12,873	$	100,643	$	100,594

Unrealized gains and losses are the result of fluctuations in the market value of the Company’s available for sale investments and are included in “Accumulated other comprehensive income” on the consolidated balance sheets. The following table summarizes net unrealized losses arising in the periods presented in addition to the tax associated with these comprehensive income items:

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Unrealized loss, net of tax	$	(32	)	$	(204	)	$	(76	)
Decrease to deferred tax liability	$	(10	)	$	(58	)	$	(41	)

The following table summarizes interest income generated from investments and cash and cash equivalents:

	Fiscal Year Ended
(in thousands)	January 27, 2013		January 29, 2012		January 30, 2011
Interest income	$	404	$	1,213	$	1,051

During fiscal year 2013, the Company acquired an investment in a privately traded company for total cash consideration of $2.5 million. The Company accounts for the investment in equity interests under the cost method of accounting since it does not have the ability to exercise significant influence over the investee. The investment in equity interests is included in “Other assets” on the consolidated balance sheet as of January 27, 2013.

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Note 5: Fair Value Measurements

Instruments Measured at Fair Value on a Recurring Basis

Financial assets measured and recorded at fair value on a recurring basis consisted of the following types of instruments:

(in thousands)	Fair Value as of January 27, 2013								Fair Value as of January 29, 2012
	Total		(Level 1)		(Level 2)		(Level 3)		Total		(Level 1)		(Level 2)		(Level 3)
Agency securities	$	7,907	$	—	$	7,907	$	—	$	26,132	$	—	$	26,132	$	—
Corporate issues	—		—		—		—		4,511		—		4,511		—
Bank time deposits	4,973		—		4,973		—		70,000		—		70,000		—
Total available-for-sale securities	12,880		—		12,880		—		100,643		—		100,643		$	—
Interest rate cap	544		—		544		—		—		—		—		—
Total financial assets	$	13,424	$	—	$	13,424	$	—	$	100,643	$	—	$	100,643	$	—

Available-for-sale securities included in Level 2 are valued utilizing inputs obtained from an independent service (the “Service”), which uses quoted market prices for identical or comparable instruments rather than direct observations of quoted prices in active markets. The Service gathers observable inputs for all of our fixed income securities from a variety of industry data providers, for example, large custodial institutions and other third-party sources. Once the observable inputs are gathered by the Service, all data points are considered and an average price is determined. The Service’s providers utilize a variety of inputs to determine their quoted prices. The Company reviews and evaluates the values provided by the Service and agrees with the valuation methods and assumptions used in determining the fair value of investments. The Company believes this method provides a reasonable estimate for fair value.

The fair value of the interest rate cap at January 27, 2013 is estimated as described in Note 11 and is included in “Other assets” on the consolidated balance sheet.

Financial assets measured and recorded at fair value on a recurring basis were presented on the Company’s consolidated balance sheets as follows:

	Fair Value as of January 27, 2013								Fair Value as of January 29, 2012
(in thousands)	Total		(Level 1)		(Level 2)		(Level 3)		Total		(Level 1)		(Level 2)		(Level 3)
Temporary investments	$	4,973	$	—	$	4,973	$	—	$	83,121	$	—	$	83,121	$	—
Long-term investments	7,907		—		7,907		—		17,522		—		17,522		—
Other assets	544		—		544		—		—		—		—		—
Total financial assets	$	13,424	$	—	$	13,424	$	—	$	100,643	$	—	$	100,643	$	—

During fiscal years 2013 and 2012, the Company had no transfers of financial assets or liabilities between Level 1, Level 2 or Level 3. As of January 27, 2013 and January 29, 2012, the Company had not elected the fair value option for any financial assets and liabilities for which such an election would have been permitted.

Instruments Not Recorded at Fair Value on a Recurring Basis

Some of the Company’s financial instruments are not measured at fair value on a recurring basis but are recorded at amounts that approximate fair value due to their liquid or short-term nature. Such financial assets and financial liabilities include: cash and cash equivalents, receivables, net, certain other assets, accounts payable and accrued expenses, accrued personnel costs, and other current liabilities.

The Company’s long-term debt is not recorded at fair value on a recurring basis, but is measured at fair value for disclosure purposes. The fair value of the Company’s debt is estimated primarily based on quotes (“ask prices”) provided by pricing services generated in a market with insufficient volume to comprise an active market (Level 2 inputs) based on the Company’s debt obligations. The fair value of the Company’s debt was $336.7 million at January 27, 2013.

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Assets and Liabilities Recorded at Fair Value on a Non-Recurring Basis

The Company reduces the carrying amounts of its goodwill, intangible assets, long-lived assets and non-marketable equity security to fair value when held for sale or determined to be impaired.

For its investment in equity interests, the Company has not identified events or changes in circumstances that may have a significant adverse effect on the fair value of its cost method investment during the last three months of fiscal year 2013.

Note 6: Inventories

Inventories, consisting of material, material overhead, labor, and manufacturing overhead, are stated at the lower of cost (first-in, first-out) or market and consist of the following:

(in thousands)	January 27, 2013		January 29, 2012
Raw materials	$	1,970	$	4,871
Work in progress	52,669		30,884
Finished goods	20,239		11,240
Inventories	$	74,878	$	46,995

Note 7: Property, Plant and Equipment

The following is a summary of property and equipment, at cost less accumulated depreciation:

(in thousands)	January 27, 2013			January 29, 2012
Property	$	9,050		$	5,991
Buildings	18,627			18,580
Leasehold improvements	8,881			5,768
Machinery and equipment	130,595			98,895
Furniture and office equipment	30,120			23,428
Construction in progress	6,330			2,444
Property, plant and equipment, gross	203,603			155,106
Less accumulated depreciation and amortization	(101,766		)	(85,393		)
Property, plant and equipment, net	$	101,837		$	69,713

The net book value of equipment and machinery that are consigned to a foundry in China is $7.9 million and $9.4 million as of January 27, 2013 and January 29, 2012, respectively.

The following table summarizes depreciation and amortization expense for property, plant and equipment:

	Fiscal Year Ended
(in thousands)	January 27, 2013		January 29, 2012		January 30, 2011
Depreciation and amortization expense	$	17,915	$	9,908	$	6,928

Note 8: Goodwill and Intangible Assets

Goodwill – Goodwill balances as of January 27, 2013 and January 29, 2012 are presented below:

(in thousands)	Carrying Amount
Balance as of January 29, 2012	$	129,651
Acquisition of Gennum Corporation	261,891
Acquisition of Cycleo SAS	2,042
Balance as of January 27, 2013	$	393,584

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During fiscal year 2013, goodwill increased by approximately $263.9 million due to the Company’s acquisitions of Gennum and Cycleo (see Note 3).

In fiscal year 2012, the Company reorganized its reporting structure in a manner that changed the composition of its product lines within its reporting units. The components of the Advanced Communications and Sensing reporting unit were split into two reporting units consisting of the Advanced Communications and the Wireless and Sensing reporting units. As a result of the change, in fiscal year 2012, goodwill was reassigned to the reporting units affected using a relative fair value allocation approach. Subsequent to the reorganization in the third quarter of fiscal year 2012, the goodwill associated with the Advanced Communications and Sensing reporting unit was reassigned (as of November 2011) such that 10% of goodwill is allocated to the Wireless and Sensing reporting unit and 90% of the goodwill is allocated to the Advanced Communications reporting unit. In connection with the reorganization, the Company assessed whether an indicator of impairment existed prior to the reorganizations and concluded that no such indicators were present in fiscal year 2012.

As a result of the acquisition of Gennum and Cycleo (see Note 3), the Company acquired $261.9 million of goodwill, associated with the newly formed Gennum reporting unit, and added $2.0 million to the Wireless and Sensing reporting unit.

Goodwill was tested for impairment as of November 30, 2012, the date of the Company’s annual impairment review. The Company concluded that the fair values of each of the Advanced Communications, the Wireless and Sensing, and Gennum reporting units exceeded their respective carrying values of goodwill and no impairment existed as of January 27, 2013. The Company estimated the fair values of its reporting units using the income approach, which utilizes estimates of discounted future cash flows. The discounted cash flows for each reporting unit were based on discrete financial forecasts developed by management for planning purposes. Cash flows beyond the discrete forecasts were estimated using a terminal value calculation, which incorporated historical and forecasted financial trends for each identified reporting unit and considered perpetual earnings growth rates for publicly traded peer companies. Future cash flows were discounted to present value by incorporating appropriate present value techniques. Specifically, the income approach valuations included the following assumptions:

Discount rate	10.0% - 13.0%
Perpetual growth rate	3.0%
Tax rate	14.7% - 20.0%
Risk-free rate	2.4%
Peer company beta	1.3 - 1.6

Purchased Intangibles - The following table sets forth the Company’s finite-lived intangible assets resulting from business acquisitions and technology licenses purchased, which continue to be amortized:

		January 27, 2013							January 29, 2012
(in thousands)	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Core technologies	2-10 years	$	173,724	$	(40,867	)	$	132,857	$	65,900	$	(21,031	)	$	44,869
Customer relationships	7-10 years	40,130		(7,736		)	32,394		12,130		(2,929		)	9,201
Technology licenses (1)	5-10 years	8,164		(1,056		)	7,108		3,000		(250		)	2,750
Other intangibles assets	1-5 years	6,600		(4,601		)	1,999		—		—			—
Total finite-lived intangible assets		$	228,618	$	(54,260	)	$	174,358	$	81,030	$	(24,210	)	$	56,820

(1) Technology licenses relate to licensing agreements entered into by the Company. Amortization expense related to technology licenses is reported as “Product development and engineering” in the consolidated statements of income.

During fiscal year 2013, acquired finite-lived intangible assets increased by approximately $147.6 million mainly due to $129.9 million due to the acquisition of Gennum, $6.1 million from the acquisition of Cycleo and $5.0 million from additional technology licenses purchased. In addition, acquired finite-lived intangible assets increased by $6.6 million due to the transfer from indefinite-lived intangible assets to core technologies upon the completion of one in-process research and development project from the acquisition of Sierra Monolithics, Inc. (“SMI”) in 2009.

Core technologies include $95.1 million and $6.1 million of finite-lived intangible assets from the acquisition of Gennum and the acquisition of Cycleo, respectively (see Note 3). The Company concluded that the intangible assets classified as core

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technologies were identifiable intangible assets, separate from goodwill, since they were capable of being separated from Gennum or Cycleo and sold, transferred or licensed, regardless of whether the Company intended to do so. Each product technology was valued separately since each was determined to have a different remaining useful life. The value for the underlying core IP technology from the acquisition of Gennum and Cycleo was assessed utilizing a discounted cash flow methodology and/or a relief from royalty method.

The nature of Gennum’s core technology was categorized as follows:

	January 27, 2013
(in thousands)	Fair Value		Estimated Useful Life
Underlying intellectual property - Clock and data recovery	$	31,000	8 years
Video broadcast and surveillance	39,000		7-8 years
Optical communication	21,000		6 years
Other	4,100		6-7 years
Total	$	95,100

For the fiscal years 2013, 2012 and 2011, amortization expense related to finite-lived intangible assets was $29.2 million, $8.4 million and $9.5 million, respectively. Amortization expense related to finite-lived intangible assets is reported as “Intangible amortization and impairments” in the consolidated statements of income.

The estimated annual amount of future amortization expense for finite-lived intangible assets will be as follows:

(in thousands)
To be recognized in:	Technology license		Sierra Monolithics		Gennum		Cycleo		Total
Fiscal year 2014	$	1,507	$	8,870	$	18,778	$	1,007	$	30,162
Fiscal year 2015	1,465		8,870		18,132		1,007		29,474
Fiscal year 2016	1,436		8,870		17,586		1,007		28,899
Fiscal year 2017	1,186		8,870		17,499		1,007		28,562
Fiscal year 2018	776		8,160		17,499		1,007		27,442
Thereafter	738		8,490		20,510		81		29,819
Total expected amortization expense	$	7,108	$	52,130	$	110,004	$	5,116	$	174,358

The following table sets forth the Company’s indefinite-lived intangible assets resulting from business acquisitions:

	January 27, 2013							January 29, 2012
(in thousands)	Gross Carrying Amount		Accumulated Impairment Loss			Net Carrying Amount		Gross Carrying Amount		Accumulated Impairment Loss			Net Carrying Amount
In-process research and development	$	34,870	$	(3,170	)	$	31,700	$	12,370	$	(2,470	)	$	9,900
Total indefinite-lived intangible assets	$	34,870	$	(3,170	)	$	31,700	$	12,370	$	(2,470	)	$	9,900

During fiscal year 2013, acquired indefinite-lived intangible assets increased by approximately $22.5 million mainly due to $29.1 million related to the acquisition of Gennum, partially offset by $6.6 million due to the transfer from indefinite-lived intangible assets to core technologies upon the completion of one in-process research and development project from SMI acquisition.

Acquired in-process research and development projects (“IPR&D”) was tested for impairment as of November 30, 2012, the date of the Company’s annual impairment review. With the exception of the impairment charge of $700,000 recorded to write-off acquired IPR&D from SMI acquisition, the Company concluded that the fair value of the acquired in-process research and developments exceeded the carrying value and no impairment existed as of January 27, 2013. The fair value of the IPR&D projects was determined using using an income approach or replacement cost approach as applicable. The replacement cost approach was used for IPR&D projects that were considered long-term core investments and were not anticipated to be profitable for a period of time. IPR&D projects which were valued using an income approach, measured the returns attributable

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to each specific IPR&D project, discounted to present value using a risk-adjusted rate of return, including as appropriate, any tax benefits derived from amortizing the intangible assets for tax purposes. Significant factors considered in the calculation of the rate of return are the weighted average cost of capital and return on assets, as well as the risk inherent in the development process, including the likelihood of achieving technology success and market acceptance. For IPR&D projects valued using a replacement cost approach, value was estimated by developing the cost to either replace or reproduce (replicate) the IPR&D to its current state. The key unobservable inputs utilized in the model include discount rates ranging from 12.0% to 18.0%, a market participant tax rate of 12.3% to 17.0%, and a probability adjusted level of future cash flows based on current product and market data.

During the third quarter of fiscal year 2012, the Company abandoned certain development efforts related to acquired intangible assets. As a result of these actions, the Company concluded that a portion of the net carrying amount of in-process research and development was not recoverable and therefore it recorded an impairment charge against the net carrying value in the three month period ended October 30, 2011, as summarized below:

(in thousands)	Net Carrying
In-process research and development impairment	Amount		Impairment
High-speed switching technology for power management applications (1)	$	2,070	$	(2,070	)
Integrated driver for telecommunications applications (2)	400		(400		)
Total	$	2,470	$	(2,470	)

(1) related to the February 2009 Leadis Technology Inc. acquisition.

(2) related to the December 2009 Sierra Monolithics, Inc. acquisition.

These impairment charges are included in “Intangible amortization and impairments” on the consolidated statements of income.

Note 9: Accrued Liabilities

The following is a summary of accrued liabilities for fiscal years 2013 and 2012:

(in thousands)	January 27, 2013		January 29, 2012
Compensation	$	23,140	$	14,330
Equity awards accounted for as a liability	3,241		3,988
Deferred compensation	1,410		901
Accrued sales and marketing expenses	3,202		1,742
Accrued professional fees	3,835		1,949
Accrued interest expense	1,177		—
Income taxes payable	4,113		4,260
Accrued taxes	266		437
Other	8,892		4,782
	$	49,276	$	32,389

Note 10: Credit Facilities

On March 20, 2012, the Company entered into a credit agreement with certain lenders (the “Lenders”) and Jefferies Finance LLC, as administrative and collateral agent (the “Credit Agreement”). Pursuant to the Credit Agreement, the Lenders provided the Company with senior secured first lien credit facilities in an aggregate principal amount of $350 million (the “Facilities”), consisting of term A loans in an aggregate principal amount of $100 million (the “Term A Loans”) and term B loans in an aggregate principal amount of $250 million (the “Term B Loans”). Both the Term A Loans and the Term B Loans mature on March 20, 2017. The initial carrying amounts totaled $99.5 million (net of original issue discount of $500,000) for the Term A Loans and $247.5 million (net of original issue discount of $2.5 million) for the Term B Loans. The respective amounts of original issue discount are being amortized using the effective interest method and are included in “Interest expense” in the consolidated statements of income. A portion of the proceeds of the loans was used to finance the acquisition of Gennum and fees, costs and expenses related thereto, and the remainder of the proceeds may be used by Semtech for working capital and general corporate purposes.

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Debt issuance costs incurred in connection with the Facilities totaled $8.9 million and are being amortized using the effective interest method over the terms of the loans, and are included in “Interest expense” in the consolidated statements of income.

The Company may request, at any time, subject to certain conditions, the establishment of one or more additional term loan facilities in an aggregate principal amount not to exceed $150 million, the proceeds of which may be used for working capital and general corporate purposes.

Interest on the Term A Loans and Term B Loans accrue at certain reference rates plus specified applicable margins. The reference rates are equivalent to, at the Company’s option, either: (i) LIBOR for interest periods of 1, 2, 3 or 6 months or, subject to certain conditions, 9 or 12 months (“LIBOR”) or (ii) the highest of (a) the prime rate, (b) the federal funds effective rate plus 1/2% or (c) one-month LIBOR plus 1.00% (“Base Rate”). For the Term B Loans, LIBOR is subject to a floor of 1.00% and Base Rate is subject to a floor of 2.00%. For the Term A Loans, the applicable margin for LIBOR loans ranges from 2.50% to 2.75% and the applicable margin for Base Rate loans ranges from 1.50% to 1.75%, in each case depending upon the total leverage ratio. For the Term B Loans, the applicable margin for LIBOR loans is 3.25% and the applicable margin for Base Rate loans is 2.25%. Interest is payable at least quarterly. As of January 27, 2013, the interest rates payable on the Term A Loans and Term B Loans were 2.96% and 4.25%, respectively.

In accordance with the Credit Agreement, and as described in Note 11, in June 2012, the Company entered into an interest rate hedging agreement protecting at least 50% of the variable interest rate exposure on the term loans.

Quarterly principal payments of $5.0 million and $0.6 million for the Term A Loans and Term B Loans, respectively, are due beginning on the last business day of the quarter ended July 29, 2012, with the final remaining payments due on the maturity date of March 20, 2017.

Scheduled maturities of current and long-term debt are as follows:

(in thousands)
Fiscal Year Ending:
2014	$	49,100
2015	22,500
2016	22,500
2017	22,500
2018	216,525
Total debt	$	333,125

Pursuant to the Credit Agreement, under certain circumstances, the Company is obligated to apply 50% of its excess cash flow (as defined in the Credit Agreement) for each fiscal year, as well as net cash proceeds from specified other sources, such as asset sales, debt issuances or insurance proceeds, to prepay the Term A Loans and Term B Loans. Excess cash flow may be primarily summarized as cash provided by operating activities less capital expenditures and loan principal payments. The first excess cash flow payment is estimated to be $26.6 million. The earliest date that any such payment may be due is 95 days after the last day of the fiscal year ending closest to January 31, 2013. The Company has classified the potential early payment of $26.6 million from “Long term debt” to “Current portion - long term debt” in the consolidated balance sheets as of January 27, 2013.

Subject to certain customary exceptions, all obligations of the Company under the Facilities are unconditionally guaranteed by each of Semtech’s existing and subsequently acquired or organized direct and indirect domestic subsidiaries (the “Guarantors”). The obligations of Semtech and the Guarantors in respect of the Facilities are secured by a first priority security interest in substantially all of the assets of Semtech and the Guarantors, subject to certain customary exceptions.

The Facilities are subject to customary affirmative and negative covenants, some of which require the maintenance of specified interest coverage and leverage ratios. The Company was subject to a minimum interest ratio of 5.00:1.00 for the fourth quarter ended January 27, 2013 and a maximum total leverage ratio of 2.65:1.00 as of the last day of the fourth quarter ended January 27, 2013. The Company was in compliance with such financial covenants as of January 27, 2013.

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Note 11: Interest Rate Derivative Agreement

In June 2012, the Company entered into an interest rate cap agreement with a $175 million notional amount and an upfront payment of $1.1 million. The agreement matures on February 22, 2016 and caps interest rates on one-month LIBOR at 1.00%.

The interest rate cap agreement has been designated as a cash flow hedge of interest rate risk and is recorded at estimated fair value as of January 27, 2013. 

The Company determined that the interest rate cap agreement is highly effective in offsetting future variable interest payments associated with the hedged portion of the Company’s term loans. No ineffectiveness was recorded during fiscal year 2013. The Company did not have any active interest contracts outstanding prior to June 2012.

The amount of unrealized losses on the interest rate cap recorded in other comprehensive loss at January 27, 2013 that is expected to be reclassified into interest expense in the next twelve months, if interest rates remain unchanged, is approximately $78,000.

The fair value of the interest rate cap at January 27, 2013 is determined based on assumptions that management believes market participants would use in pricing. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities. Based on the inputs used in the valuation, the Company has determined that the derivative valuation is classified in Level 2 of the fair value hierarchy.

Note 12: Stock-Based Compensation

Financial Statement Effects and Presentation. The following table shows total pre-tax, stock-based compensation expense included in the consolidated statements of income for fiscal years 2013, 2012 and 2011.

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Cost of sales	$	1,218		$	983		$	1,802
Selling, general and administrative	14,965			15,839			19,310
Product development and engineering	8,345			7,198			7,898
Stock-based compensation, pre-tax	$	24,528		$	24,020		$	29,010
Net change in stock-based compensation capitalized into inventory	$	(33	)	$	(83	)	$	(116	)

The below table summarizes the net impact of stock-based compensation, after tax, on net income for fiscal years 2013, 2012 and 2011.

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Stock-based compensation	$	24,528		$	24,020		$	29,010
Associated tax effect	(5,120		)	(5,693		)	(9,170		)
Net effect on net income	$	19,408		$	18,327		$	19,840

The tax benefit realized from option exercise activity for fiscal years 2013, 2012 and 2011 was $14.3 million, $12.9 million and $7.1 million, respectively.

Share-based Payment Arrangements

The Company has various equity award plans that provide for granting stock-based awards to employees and non-employee directors of the Company. The plans provide for the granting of several available forms of stock compensation. As of January 27, 2013, the Company has granted options and restricted stock under the plans and has also issued some stock-based compensation outside of the plans, including options and restricted stock issued as inducements to join the Company.

Grant Date Fair Values and Underlying Assumptions; Contractual Terms

The Company uses the Black-Scholes pricing model to value options. For awards classified as equity, stock-based compensation cost is measured at grant date, based on the fair value of the award, and is recognized as an expense over the

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employee’s or director’s requisite service period. For awards classified as liabilities, stock-based compensation cost is measured at fair value at the end of each reporting date until the date of settlement, and is recognized as an expense over the employee’s or director’s requisite service period. Expected volatilities are based on historical volatility using daily and monthly stock price observations.

The following table summarizes the assumptions used in the Black-Scholes model to determine the fair value of options granted in fiscal years 2013, 2012 and 2011:

	Fiscal Year Ended
	January 27, 2013	January 29, 2012	January 30, 2011
Expected lives, in years	4.4 - 4.6	4.4 - 4.7	4.3 - 5.1
Estimated volatility	38% - 41%	40% - 41%	39% - 40%
Dividend yield	—	—	—
Risk-free interest rate	0.66% - 0.73%	0.71% - 1.8%	1.2% - 2.3%
Weighted average fair value on grant date	$9.52	$8.43	$6.56

The estimated fair value of restricted stock awards was calculated based on the market price of the Company’s common stock on the date of grant. Some of the restricted stock units awarded in fiscal year 2013 and prior years are classified as liabilities rather than equity. For awards classified as liabilities, the value of these awards is re-measured at the end of each quarter.

Stock Option Awards. The Company has historically granted stock option awards to both employees and non-employee directors. The grant date for these awards is equal to the measurement date. These awards were valued as of the measurement date and are amortized over the requisite vesting period (typically 3-4 years). A summary of the activity for stock option awards for fiscal years 2013, 2012 and 2011 is presented below:

(in thousands, except for per share amounts)	Number of Shares		Weighted Average Exercise Price (per share)		Aggregate Intrinsic Value (1)		Aggregate Unrecognized Compensation		Number of Shares Exercisable	Weighted Average Contractual Term (years)
Balance at January 31, 2010	9,151		$	16.44	$	8,998	$	9,436	6,302
Options granted	403		17.61
Options exercised	(2,329	)	14.22		11,495
Options cancelled/forfeited	(603	)	21.35
Balance at January 30, 2011	6,622		16.84		35,492		7,067		5,160
Options granted	343		24.05
Options exercised	(2,781	)	16.64		22,537
Options cancelled/forfeited	(494	)	22.30
Balance at January 29, 2012	3,690		16.94		44,435		4,699		2,767
Options granted	258		28.21
Options exercised	(1,254	)	15.70		14,508
Options cancelled/forfeited	(115	)	25.30
Balance at January 27, 2013	2,579		$	18.29	$	29,789	$	3,817	1,937
Exercisable at January 27, 2013	1,937		$	16.51	$	25,822				2.1
Vested and expected to vest after January 27, 2013	2,495		$	18.10	$	29,293				2.6

(1) Represents the difference between the exercise price and the value of the Company’s stock at the time of exercise, for exercised grants. For outstanding awards, represents the difference between the exercise price and the value of the Company’s stock at fiscal year end.

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The following table summarizes information about stock options outstanding at January 27, 2013.

(number of shares in thousands)	Number of Shares	Weighted Average Exercise Price (per share)		Weighted Average Contractual Term (years)
Price Range Analysis - Outstanding
$1.15 - $4.53	9	$	2.52	4.3
$7.79 - $13.15	247	11.59		2.1
$13.76 - $20.90	1,671	16.58		2.1
$21.02 - $29.68	652	25.43		4.4
Total outstanding	2,579	$	18.29	2.7
Price Range Analysis - Exercisable
$1.15 - $4.53	9	$	2.52	4.3
$7.79 - $13.15	241	11.62		2.0
$13.76 - $20.90	1,494	16.52		2.0
$21.02 - $29.68	193	23.18		2.8
Total exercisable	1,937	$	16.51	2.1

The following table summarizes information regarding unvested stock option awards at January 27, 2013:

(in thousands, except for per share amounts)	Number of Shares		Weighted Average Exercise Price (per share)		Weighted Average Grant Date Fair Value (per share)		Weighted Average Remaining Expense Period (years)	Total Fair Value
Balance at January 31, 2010	2,849		$	13.31	$	7.48	1.9	$	21,311
Options granted	403		17.61		6.56			2,644
Options vested	(1,575	)	13.07		8.26			13,006
Options forfeited	(215	)	11.57		8.56			1,845
Balance at January 30, 2011	1,462		15.00		6.23		1.9	$	9,103
Options granted	343		24.05		8.43			2,893
Options vested	(650	)	14.30		6.33			4,115
Options forfeited	(231	)	16.59		6.39			1,479
Balance at January 29, 2012	924		18.47		6.99		1.8	$	6,452
Options granted	258		28.21		9.52			2,457
Options vested	(484	)	16.42		6.49			3,144
Options forfeited	(56	)	21.69		7.74			432
Balance at January 27, 2013	642		$	23.66	$	8.31	1.9	$	5,333

Restricted Stock. The Company has not granted any restricted stock to employees since fiscal year 2009. The grant date for these awards is equal to the measurement date. These awards are valued as of the measurement date and recognized as compensation expense over the requisite vesting period (typically 3-4 years).

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The following table summarizes the activity for restricted stock awards for fiscal years 2013, 2012 and 2011:

(in thousands, except for per share amounts)	Number of Shares		Weighted Average Grant Date Fair Value (per share)		Aggregate Intrinsic Value (1)		Aggregate Unrecognized Compensation		Weighted Average Period Over Which Expected to be Recognized (in years)
Balance at January 31, 2010	418		$	15.15			$	3,193	1.2
Restricted stocks granted	—
Restricted stocks vested	(270	)	17.33		$	4,678
Restricted stocks cancelled	(13	)	17.44
Balance at January 30, 2011	135		14.44				984		0.8
Restricted stocks granted	—
Restricted stocks vested	(91	)	14.29		2,201
Restricted stocks cancelled	(12	)	15.25
Balance at January 29, 2012	32		14.57				81		0.1
Restricted stocks granted	—
Restricted stocks vested	(32	)	14.57		$	902
Restricted stocks cancelled	—
Balance at January 27, 2013	—		$	—			$	—	—

(1) Represents the value of Semtech stock on the date that the restricted stock vested.

Performance Units. The Company grants performance-based vesting restricted stock units to select employees. These awards have a performance condition in addition to a service condition. The performance condition generally relates to the Company’s revenue and operating income measured against internal goals. Under the terms of these awards, assuming the highest level of performance with no cancellations due to forfeitures, the maximum number of shares that can be earned in the aggregate is 696,400. In this scenario, the maximum number of shares that could be issued thereunder would be 353,200 and the Company would have a liability accrued in the consolidated balance sheet equal to the value of 343,200 shares on the settlement date, which would be settled in cash. Only cash performance unit awards are classified as liabilities and the value of these awards is re-measured at each reporting date. At January 27, 2013, 85% of the units from the fiscal year 2009 grant vested and 200% of the units from the fiscal year 2010 grant are expected to vest. At January 27, 2013, the performance metrics associated with the outstanding awards issued in fiscal years 2013, 2012 and 2011 are expected to be met at a level which would result in a grant at 100%, 108%, and 200% of target, respectively.

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The following table summarizes the activity for performance units during fiscal years 2013, 2012 and 2011:

			Subject to Share Settlement		Subject to Cash Settlement					Weighted  Average Grant Date		Aggregate		Period Over Which Expected
(in thousands, except for per share amounts)	Total Units		Units		Units		Recorded Liability			Fair Value (per share)		Unrecognized Compensation		to be Recognized (in years)
Balance at January 31, 2010	593		363		230		$	259		$	14.29	$	580	1.3
Performance units granted	143		72		71					16.68
Performance units vested	—		—		—		—			—
Performance units cancelled/forfeited	(180	)	(109	)	(71	)				16.28
Change in liability							3,666			—
Balance at January 30, 2011	556		326		230		3,925			14.26		7,971		1.0
Performance units granted	117		59		58					23.33
Performance units vested	(218	)	(157	)	(61	)	(1,335		)	14.74
Performance units cancelled/forfeited	(95	)	(48	)	(47	)				15.26
Change in liability							3,444
Balance at January 29, 2012	360		180		180		6,034			16.65		4,829		1.0
Performance units granted	144		77		67					29.30
Performance units vested	(144	)	(72	)	(72	)	(4,172		)	11.92
Performance units cancelled/forfeited	(7	)	(4	)	(3	)				29.35
Change in liability							2,560
Balance at January 27, 2013	353		181		172		$	4,422		$	23.50	$	4,754	1.1

Stock Units, Employees. The Company issues stock unit awards to employees which are expected to be settled with stock. The grant date for these awards is equal to the measurement date. These awards are valued as of the measurement date and amortized over the requisite vesting period (typically 4 years). The following table summarizes the stock unit award activity for fiscal years 2013, 2012 and 2011:

(in thousands, except per share amount)	Number of Units		Weighted Average Grant Date Fair Value (per unit)		Aggregate Intrinsic Value (1)		Aggregate Unrecognized Compensation		Weighted Average Period Over Which Expected to be Recognized (in years)
Balance at January 31, 2010	1,410		$	15.72			$	17,713	3.4
Stock units granted	1,181		17.62
Stock units vested	(404	)	19.20		$	7,749
Stock units forfeited	(129	)	19.50
Balance at January 30, 2011	2,058		16.70				29,763		2.7
Stock units granted	810		22.74
Stock units vested	(627	)	16.61		14,333
Stock units forfeited	(259	)	17.75
Balance at January 29, 2012	1,982		19.06				31,472		2.4
Stock units granted	1,517		26.73
Stock units vested	(699	)	18.20		$	18,438
Stock units forfeited	(242	)	23.65
Balance at January 27, 2013	2,558		$	23.41			$	49,374	2.5

(1) Reflects the value of Semtech stock on the date that the stock unit vested.

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Stock Units, Non-Employee Directors. The Company grants stock unit awards to non-employee directors. These restricted stock units are accounted for as liabilities and accrued in the consolidated balance sheets because they are cash settled. These awards are vested after 1 year of service. However, because these awards are not typically settled until a non-employee director’s separation from service, the value of these awards is re-measured at the end of each reporting period until settlement. The following table summarizes the activity for stock unit awards for fiscal years 2013, 2012 and 2011:

(in thousands, except per share amount)	Number of Units		Recorded Liability		Weighted Average Grant Date Fair Value (per unit)		Aggregate Unrecognized Compensation		Period Over Which Expected to  be Recognized (in years)
Balance at January 31, 2010	35		$	1,389	$	16.18	$	232	0.4
Stock units granted	30				16.43
Stock units vested	(35	)			16.18
Stock units forfeited	—
Change in liability			1,025
Balance at January 30, 2011	30		2,414		16.43		269		0.4
Stock units granted	18				27.60
Stock units vested	(30	)			16.43
Stock units forfeited	—
Change in liability			1,459
Balance at January 29, 2012	18		3,873		27.60		216		0.4
Stock units granted	20				24.46
Stock units vested	(18	)			27.60
Stock units forfeited	—
Change in liability			684
Balance at January 27, 2013	20		$	4,557	$	24.46	$	253	0.4

As of January 27, 2013, the total number of vested but unsettled stock units for Non-Employee Directors is 141,155 units which are included in the recorded liability.

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Note 13: Interest Income and Other (Expense) Income, Net

Interest and other expense, net, consist of the following:

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Interest income	$	404		$	1,213		$	1,051
Non-recoverable VAT tax	(217		)	(156		)	(118		)
Foreign currency transaction loss	(354		)	(504		)	(428		)
Miscellaneous (expense) income	(810		)	40			69
Interest income and other (expense), net	$	(977	)	$	593		$	574

Note 14: Income Taxes

The (benefit) provision for taxes consists of the following:

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Current tax provision
Federal	$	7,100		$	2,336		$	3,178
State	784			569			444
Foreign	5,745			4,615			2,822
Subtotal	13,629			7,520			6,444
Deferred tax (benefit) provision
Federal	(15,812		)	(4,417		)	(1,631		)
State	(148		)	1,232			(5		)
Foreign	(39,359		)	757			1,952
Subtotal	(55,319		)	(2,428		)	316
(Benefit) provision for taxes	$	(41,690	)	$	5,092		$	6,760

The (benefit) provision for taxes reconciles to the amount computed by applying the statutory federal rate to income before taxes as follows:

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Federal income tax at statutory rate	$	86		$	32,963		$	27,766
State income taxes, net of federal benefit	(2,472		)	(263		)	581
Foreign taxes at rates less than federal rates	(9,655		)	(16,269		)	(16,367		)
Tax credits generated	(5,328		)	(2,222		)	(1,234		)
Changes in valuation allowance	2,703			1,814			(879		)
Changes in uncertain tax positions	132			(3,235		)	2,755
Deemed dividends	1,101			1,250			1,056
Equity compensation	793			(1,312		)	1,639
Permanent differences	1,571			1,592			1,652
Sales exclusion - foreign jurisdiction	(10,689		)	(11,017		)	(9,429		)
Dividend and U.S. tax on foreign earnings	(23,443		)	—			—
Revaluation of deferred taxes assets and liabilities	3,510			—			—
Other	1			1,791			(780		)
(Benefit) provision for taxes	$	(41,690	)	$	5,092		$	6,760

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During fiscal year 2013, the Company released $1.1 million of previously recorded reserves for uncertain tax positions as a result of statutes of limitations for the taxing authority to challenge the position expiring.

The deferred tax assets and deferred tax liabilities are classified in the consolidated balance sheets as follows:

(in thousands)	January 27, 2013			January 29, 2012
Deferred tax assets
Current	$	7,473		$	5,339
Non-current	33,563			—
Subtotal	41,036			5,339
Deferred tax liabilities
Current	(4,221		)	(4,041		)
Non-current	(2,042		)	(1,000		)
Subtotal	(6,263		)	(5,041		)
Net deferred tax assets	$	34,773		$	298

The Financial Accounting Standards Board’s (“FASB”) Accounting Standards Codification (“ASC”) Topic 740, Accounting for Income Taxes, requires that for a particular tax-paying component of an enterprise, and within a particular tax jurisdiction, (a) all current deferred tax liabilities and assets shall be offset and presented as a single amount and (b) all noncurrent deferred tax liabilities and assets shall be offset and presented as a single amount. Deferred tax liabilities and assets attributable to different tax-paying components of the enterprise or to different tax jurisdictions should not be offset.

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The components of the net deferred income tax assets at January 27, 2013 and January 29, 2012 are as follows:

(in thousands)	January 27, 2013			January 29, 2012
Current deferred tax asset:
Deferred revenue	$	1,889		$	2,346
Inventory reserve	567			347
Payroll and related accruals	2,444			1,926
Bad debt reserve	323			359
Accrued service fees	626			405
Other deferred assets	2,593			508
Valuation allowance	(969		)	(552		)
Total current deferred tax asset	7,473			5,339
Non-current deferred tax asset:
Research and development charges	2,900			3,708
Research credit carryforward	49,257			11,967
Acquired NOL carryforward	28,595			16,489
Payroll and related accruals	5,389			4,497
Stock-based compensation	8,456			10,248
Other deferred assets	3,395			772
Valuation allowance	(7,351		)	(5,065		)
Total non-current deferred tax asset	90,641			42,616
Current deferred tax liability:
Inventory reserve - foreign	(1,618		)	(2,115		)
Bad debt reserve - foreign	(773		)	(671		)
Depreciation - foreign	(1,744		)	(1,074		)
Other current deferred tax liability	(86		)	(181		)
Total current deferred tax liability	(4,221		)	(4,041		)
Non-current deferred tax liability:
Domestic tax on foreign earnings	—			(23,443		)
Purchase accounting deferred tax liability	(49,181		)	(14,159		)
Depreciation and amortization	(8,504		)	(5,760		)
Other non-current deferred tax liability	(1,435		)	(254		)
Total non-current deferred tax liability	(59,120		)	(43,616		)
Net deferred tax asset	$	34,773		$	298

The change in the net deferred tax asset differs from the deferred tax provision as a result of deferred tax assets that do not typically impact the provision. This includes the benefit related to tax deductions from the exercise of non-qualified stock options in excess of compensation cost recognized for financial reporting purposes (recorded as an increase to additional paid-in capital when realized).

As of January 27, 2013, the Company had federal and state net operating loss carryforwards of $73.7 million and $86.3 million, respectively, which, subject to certain limitations, are available to offset future taxable income through fiscal year 2032. A portion of these losses were generated by SMI prior to the Company’s purchase of SMI and therefore are subject to change of control provisions which limit the amount of acquired tax attributes that can be utilized in a given tax year. The Company does not expect these changes in control limitations to significantly impact its ability to utilize these attributes.

Included in the Company’s net operating loss carryforward deferred tax asset is approximately $8.3 million of deferred tax assets attributable to excess equity deductions related to stock awards that may not be included on the Company’s consolidated balance sheet. Due to a provision within ASC 740, concerning when tax benefits related to excess stock option deductions can be credited to paid-in capital, the portion of the Company’s deferred tax asset related to such excess tax benefits must be excluded from the deferred tax asset balance, even if the facts and circumstances indicate that it is more likely than not that the

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deferred tax asset can be realized. The deferred tax asset and the related credit to paid-in capital will only be included as the related deferred tax asset is applied to reduce taxes payable.

As of January 27, 2013, the Company had gross federal and state research credits available of approximately $6.0 million and $12.3 million, respectively, which are available to offset taxable income. These credits will expire between fiscal years 2022 through 2033. As of January 27, 2013, the Company had federal Alternative Minimum Tax credits available of approximately $1.3 million. The Company also had Canadian research credits available of approximately $34.7 million. These credits will expire between fiscal years 2025 and 2033.

The Company has established valuation allowances against certain U.S. state and foreign deferred tax assets to reflect its concerns regarding the ability of the Company to generate sufficient taxable income to utilize these attributes. The following table summarizes the changes in these allowances during fiscal years 2013, 2012 and 2011:

	Fiscal Year Ended
(in thousands)	January 27, 2013		January 29, 2012		January 30, 2011
Beginning balance	$	5,617	$	5,053	$	6,502
Additions	2,703		564		2,767
Releases	—		—		(4,216		)
Ending balance	$	8,320	$	5,617	$	5,053

Realization of the net deferred tax assets is dependent on generating sufficient taxable income during the periods in which temporary differences will reverse. Although realization is not assured, management believes it is more likely than not that the remaining net deferred tax assets will be realized. The amount of the net deferred tax assets considered realizable, however, could be adjusted in the near term if estimates of future taxable income during the reversal periods are revised.

As of January 27, 2013, the Company had approximately $383.7 million of unremitted earnings related to the Company’s wholly owned foreign subsidiaries.

In the fourth quarter of fiscal year 2010, in connection with the SMI acquisition, the Company modified its previous assertion that all of its earnings were permanently reinvested offshore and concluded that $120.0 million of foreign earnings were not permanently reinvested offshore. Of this amount, $50.0 million was actually repatriated to the U.S., leaving $70.0 million of unrepatriated foreign subsidiary earnings.

In the first quarter of fiscal year 2013, in connection with the acquisition of Gennum, the Company reviewed its assertion regarding the amount of foreign subsidiary earnings that were considered to be permanently reinvested offshore and concluded that due to post-acquisition foreign operating cash needs, all of its foreign subsidiary earnings, including the aforementioned $70.0 million, are considered to be permanently reinvested offshore. This change in assertion resulted in the recognition of a one-time tax benefit of $23.4 million in the first quarter of fiscal year 2013.

Uncertain Tax Positions

The Company uses a two-step approach to recognize and measure uncertain tax positions (“UTP”). The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon ultimate settlement.

A reconciliation of the beginning and ending amount of gross unrecognized tax benefits (before federal impact of state items) is as follows:

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Beginning balance	$	13,759		$	17,011		$	13,795
Additions based on tax positions related to the current year	695			835			449
Additions for tax positions of prior years	—			—			3,592
Reductions for tax positions of prior years	(647		)	(4,087		)	—
Reductions for settlements with tax authorities	(663		)	—			(825		)
Ending balance	$	13,144		$	13,759		$	17,011

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Reductions recorded in the current year related to a release of previously recorded reserves for uncertain tax positions as a result of statutes of limitations for the taxing authority to challenge the position expiring and effective settlement of the position through examination.

Included in the balance of unrecognized tax benefits at January 27, 2013 and January 29, 2012, are $11.1 million and $11.6 million, respectively, of net tax benefits (after federal impact of state items) that, if recognized, would impact the effective tax rate.

The liability for uncertain tax positions is reflected on the consolidated balance sheets as follows:

	Fiscal Year Ended
(in thousands)	January 27, 2013		January 29, 2012
Accrued liabilities	$	188	$	437
Other long-term liabilities	10,887		11,159
Total accrued taxes	$	11,075	$	11,596

The Company’s policy is to include net interest and penalties related to unrecognized tax benefits within the provision for taxes on the consolidated statements of income. During fiscal years 2013 and 2012, a net increase of $50,000 and $50,000 of interest and penalties was recognized in the consolidated statement of income, respectively. The Company had approximately $293,000 and $243,000 of net interest and penalties accrued at January 27, 2013 and January 29, 2012, respectively.

In the second quarter of fiscal year 2013, the overall statutory tax rate in Canada increased as a result of newly enacted tax legislation. The impact of this tax law change resulted in a $3.4 million discrete charge to the Canadian tax provision and a corresponding adjustment to the Company’s deferred tax liabilities.

As of January 27, 2013, it was reasonably possible that the total amounts of unrecognized tax benefits would decrease by up to $0.2 million within twelve months as a result of statutes of limitations for the taxing authority to challenge the position expiring. If recognized, this decrease will impact the effective tax rate.

Tax years prior to 2009 (the Company’s fiscal year 2010) are generally not subject to examination by the Internal Revenue Service (“IRS”) except for items involving tax attributes that have been carried forward to tax years whose statute of limitations remains open. The Company is currently under IRS audit for fiscal year 2010 and fiscal year 2011. For state returns, the Company is generally not subject to income tax examinations for years prior to 2008 (the Company’s fiscal year 2009). The Company has a primary significant tax presence in Switzerland for which Swiss tax filings have been examined through fiscal year 2010. The Company is also subject to routine examinations by various foreign tax jurisdictions in which it operates.

Note 15: Commitments and Contingencies

Leases

The Company leases facilities and certain equipment under operating lease arrangements expiring in various years through fiscal year 2020. The aggregate minimum annual lease payments under leases in effect on January 27, 2013 are as follows:

Minimum Annual Lease Payments

(in thousands)
Fiscal Year Ending:
2014	$	8,743
2015	5,644
2016	4,625
2017	3,321
2018	3,140
Thereafter	11,383
Total minimum lease commitments	$	36,856

Rent expense was $7.9 million, $4.4 million and $4.4 million for fiscal years 2013, 2012 and 2011, respectively. The Company received $133,000, $0 and $158,000 of sub-lease income in fiscal years 2013, 2012 and 2011, respectively.

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Vendor Commitments

The Company has entered into multiple technology development agreements with one of its key wafer suppliers. Under the terms of these agreements, the Company is required to pay $1.2 million and $0.3 million for fiscal years 2014 and 2015, respectively.

Legal Matters

From time to time in the ordinary course of its business, the Company is involved in various claims, litigation, and other legal actions that are normal to the nature of its business, including with respect to intellectual property, contract, product liability, employment, and environmental matters.

In accordance with accounting standards regarding loss contingencies, the Company accrues an undiscounted liability for those contingencies where the incurrence of a loss is probable and the amount can be reasonably estimated, and the Company discloses the amount accrued and the amount of a reasonably possible loss in excess of the amount accrued, if such disclosure is necessary for its financial statements not to be misleading. The Company does not record liabilities when the likelihood that the liability has been incurred is probable but the amount cannot be reasonably estimated, or when the liability is believed to be only reasonably possible or remote.

Because litigation outcomes are inherently unpredictable, the Company’s evaluation of legal proceedings often involves a series of complex assessments by management about future events and can rely heavily on estimates and assumptions. While the consequences of certain unresolved proceedings are not presently determinable, and an estimate of the probable and reasonably possible loss or range of loss in excess of amounts accrued for such proceedings cannot be reasonably made, an adverse outcome from such proceedings could have a material adverse effect on the Company’s earnings in any given reporting period. However, in the opinion of management, after consulting with legal counsel, and taking into account insurance coverage, any ultimate liability related to current outstanding claims and lawsuits, individually or in the aggregate, is not expected to have a material adverse effect on the Company’s financial statements, as a whole.

The Company’s currently pending legal matters of note are discussed below:

Environmental Matters. In 2001, the Company was notified by the California Department of Toxic Substances Control (“State”) that it may have liability associated with the clean-up of the one-third acre Davis Chemical Company site in Los Angeles, California. The Company has been included in the clean-up program because it was one of the companies that used the Davis Chemical Company site for waste recycling and/or disposal between 1949 and 1990. The Company joined with other potentially responsible parties and entered into a Consent Order with the State that required the group to perform a soils investigation at the site and submit a remediation plan. The State has approved the remediation plan, which completes the group’s obligations under the Consent Order. Although the Consent Order does not require the group to remediate the site and the State has indicated it intends to look to other parties for remediation, the State has not yet issued “no further action” letters to the group members. To date, the Company’s share of the group’s expenses has not been material and has been expensed as incurred.

The Company has used an environmental firm, specializing in hydrogeology, to perform monitoring of the groundwater at the Company’s former facility in Newbury Park, California that was leased for approximately forty years. The Company vacated the building in May 2002. Certain contaminants have been found in the local groundwater and site soils. Groundwater monitoring results to date over a number of years indicate that groundwater contaminants are, in full or in material part, from adjacent facilities. Responsibility for soil contamination remains under investigation. The location of key soil contamination is concentrated in an area of an underground storage tank that the Company believes to have been installed and used in the early 1960s by a former tenant at the site who preceded the Company’s tenancy. There are no claims pending with respect to environmental matters at the Newbury Park site. The applicable regulatory agency having authority over the site issued joint instructions in November 2008, ordering the Company and the current owner of the site to perform additional assessments and surveys, and to create ongoing groundwater monitoring plans before any final regulatory action for “no further action” may be approved. In September 2009, the regulatory agency issued supplemental instructions to the Company and the current site owner regarding previously ordered site assessments, surveys and groundwater monitoring. Most recently, in November 2012, the regulatory agency added two more potentially responsible parties to the matter, based on historical evidence of past occupancy or operations at the site dating to the 1960s. In addition, the regulatory agency has issued draft cleanup and abatement orders to all the parties. Responses to the draft orders were submitted in a timely manner by all the parties in January 2013. The parties are expected to work cooperatively in responding to and determining the appropriate scope and extent of additional site investigative and categorization work, as well as in relation to any ultimate proposed clean up and abatement work.

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The Company has accrued liabilities where it is probable that a loss will be incurred and the cost or amount of loss can be reasonably estimated. Based upon, and in anticipation of the likely outcome associated with the November 2012 draft cleanup and abatement order, the Company engaged an environmental firm to assist in an assessment of this site consistent with the direction of the draft order. Based on the Company’s preliminary assessment, it has determined a likely range of probable loss between $2.5 million and $5.7 million. Given the early nature of the draft clean up and abatement order and uncertainties associated with environmental assessment and the remediation activities, the Company is unable to determine a best estimate within the range of loss. Therefore, the Company recorded the minimum amount of $2.5 million in the third quarter of fiscal year 2013 under “Other long-term liabilities” on the consolidated balance sheets, and included in the consolidated statement of income under “Selling, general and administrative.” These estimates could change as a result of changes in planned remedial actions, further actions from the regulatory agency, remediation technology, and other factors.

V SEMICONDUCTOR LITIGATION

Gennum Corporation v. V Semiconductor Inc., et al. In a lawsuit filed by Gennum Corporation against V Semiconductor and the directors of V Semiconductor in the Ontario (Canada) Superior Court of Justice on February 3, 2012, the Company alleged that the defendants (i) misappropriated confidential information, (ii) had created and sold products based on the misappropriated confidential information (the “infringing products”), and (iii) had infringed copyright under applicable Canadian law to specified integrated circuit design scripts and related software code and design files (the “technology”). The Company also alleged that the individual named directors of V Semiconductor were in breach of contract, had unlawfully interfered with the economic interests of the Company, and had breached common law duties owed by them to the Company. The Company sought confirmation that its copyright had been infringed, injunctive relief against further infringement and damages in connection with the alleged infringement and alleged breaches referenced above.

The allegations against the individual defendants arose from and relate to the named defendants’ prior involvement with Gennum as the principals in the sale to Gennum of the business from which the applicable technology at issue arose. Such defendants were also employees subsequent to their sale of the applicable company to Gennum prior to their resignation.

V Semiconductor Inc. v. Semtech Corporation et al.    A complaint was filed on April 27, 2012 in the U.S. District Court, Eastern District of Michigan, Southern Division, against the Company, certain current and former employees and one non-employee director (the “U.S. litigation”).

The Complaint alleged that the Company and the named individual defendants had, through acts leading up to and connected with the initiation and prosecution of the Gennum Corporation v. V Semiconductor Inc. et. al. litigation in Ontario, Canada discussed above (the “Canadian litigation”) acted in violation of U.S. and Michigan state law regarding restraint of trade by filing a “sham” lawsuit. The Complaint further alleged that the Company and the named individual defendants had conducted a malicious prosecution via the Canadian litigation, had tortiously interfered with prospective economic advantage and business expectations of V Semiconductor, had engaged in unfair competition, and, as for the non-employee director individually, breached non-disclosure and confidentiality obligations owed by the non-employee director to V Semiconductor.

The Complaint alleged that the defendants filed the Canadian litigation frivolously, without merit, without factual substance, and for the primary purposes of causing a pending acquisition of V Semiconductor to fail, causing current and prospective customers of V Semiconductor to cease or avoid doing business with V Semiconductor, and preventing competing and allegedly superior technology and products from entering the marketplace.

The Complaint sought permanent injunctive relief against the alleged anti-competitive and tortious conduct of the defendants, and sought economic and punitive damages from the defendants.

Settlement Status

The parties to the Canadian litigation and U.S. litigation entered into a Confidential Settlement Agreement and Mutual Release, under which all claims in all suits have now been dismissed. The settlement was subject to the satisfaction of certain conditions, and became effective on or about September 7, 2012 following completion of the applicable conditions and contingencies. Pursuant to the settlement having become effective, the parties to the Canadian litigation and U.S. litigation have secured the dismissal and termination with prejudice of the applicable legal proceedings. The Company has not accrued any amounts in connection with the settlement.

Commercial Disputes

The Company periodically is involved in disputes arising in the normal course of business regarding products or services provided to the Company by vendors or service providers. Historically, the cost of commercial disputes has been immaterial to the Company’s consolidated financial statements.

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Product Warranties

The Company’s general warranty policy provides for repair or replacement of defective parts. In some cases, a refund of the purchase price is offered. In certain instances the Company has agreed to other warranty terms, including some indemnification provisions.

The product warranty accrual reflects the Company’s best estimate of probable liability under its product warranties. The Company accrues for known warranty issues if a loss is probable and can be reasonably estimated, and accrues for estimated incurred but unidentified issues based on historical experience. Historically, warranty expense has been immaterial to the Company’s consolidated financial statements.

Retirement Plans

The Company contributed $1.2 million, $1.2 million and $1.0 million, respectively, in fiscal years 2013, 2012 and 2011 to the 401(k) retirement plan maintained for its domestic employees.

The Company contributes to the CSEM Pension fund, a Swiss multiemployer plan, that provides pension benefits (the “Plan”). The Plan is a foundation into which several employers are affiliated. Benefits payable from the pension plan include retirement pension, death, and disability benefits. The risk of participating in this multiemployer plan is different from a single-employer plan due to the comingling of assets and related investment returns and risks and aggregation of actuarial experience and related gains or losses for allocation amongst participating employers; contributions pursuant to prescribed formulae consistent for all participating employers; and, in the event of a participating employer’s withdrawal from the Plan, retirees receiving benefits from the Plan remain within the Plan and will continue to receive future benefit payments funded by the remaining participating employers thereafter.

The Plan is administered on behalf of a labor union, which is similar to common practices found in the United States involving collective bargaining agreements and labor unions. EIN/Pension plan number, Pension protection act zone status, FIP/RP status and Form 5500 are not applicable as the Plan is a Swiss plan governed by pension laws in Switzerland. The Company contributed $0.8 million, $0.8 million and $0.8 million, respectively, in fiscal years 2013, 2012 and 2011 to the Plan. At the date the Company’s financial statements were issued, the Plan’s audited financial statements were not available for the Plan year ending in 2012.

In addition, the Company also contributed $1.5 million in fiscal year 2013 to a defined contribution plan for its employees in Canada.

Deferred Compensation

The Company maintains a deferred compensation plan for certain officers and key executives that allow participants to defer a portion of their compensation for future distribution at various times permitted by the plan. This plan provides for a discretionary Company match up to a defined portion of the employee’s deferral, with any match subject to a vesting period.

The following table shows the compensation expense and forfeitures under this plan for fiscal years 2013, 2012 and 2011:

	Fiscal Year Ended
(in thousands)	January 27, 2013		January 29, 2012			January 30, 2011
Forfeitures	$	—	$	(194	)	$	(66	)
Compensation expense	1,839		885			2,166
Compensation expense, net of forfeitures	$	1,839	$	691		$	2,100

The Company’s liability for deferred compensation plan for certain officers and key executives is presented below:

(in thousands)	January 27, 2013		January 29, 2012
Accrued liabilities	$	530	$	901
Other long-term liabilities	13,396		10,222
Total deferred compensation liabilities under this plan	$	13,926	$	11,123

Additionally, pursuant to the earn-out arrangement with Cycleo stockholders, the Company potentially may make payments totaling up to approximately $16 million based on the achievement of a combination of certain revenue and operating income milestones by Cycleo over the period of 4 years beginning on April 30, 2012. For certain of the Cycleo stockholders, payment of the earn-out liability is contingent upon employment at the end of the 4-year period and is accounted for as post-acquisition compensation expense over the service period. The portion of the earn-out liability that is not dependent on continued

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employment is included in the purchase price allocation at March 7, 2012. During the fiscal year ended January 27, 2013, the Company recognized $1.8 million of compensation expense related to the deferred compensation liability.

The Company has purchased whole life insurance on the lives of certain current deferred compensation plan participants. This Company-owned life insurance is held in a grantor trust and is intended to cover a majority of the Company’s costs of the deferred compensation plan. The cash surrender value of the Company-owned life insurance was $10.0 million and $10.2 million as of January 27, 2013 and January 29, 2012, respectively, and is included in “Other assets” on the consolidated balance sheet.

Indemnification

The Company has entered into agreements with its current executive officers and directors indemnifying them against certain liabilities incurred in connection with the performance of their duties. The Company’s Certificate of Incorporation and Bylaws contain comparable indemnification obligations with respect to the Company’s current directors and employees.

Note 16: Geographic Information and Concentration of Risk

The Company operates exclusively in the semiconductor industry and primarily within the analog and mixed-signal sector.

The table below provides net sales activity by product line on a comparative basis for all periods. As a result of the acquisition of Gennum and Cycleo (see Note 3) in March 2012, the Company formed a separate Gennum product line while Cycleo is part of the Wireless and Sensing product line.

	Fiscal Year Ended
(in thousands, except percentages)	January 27, 2013				January 29, 2012				January 30, 2011
Advanced Communications	$	133,533	23	%	$	139,695	29	%	$	112,019	25	%
Wireless and Sensing	50,444		9	%	57,124		12	%	59,107		13	%
Power Management and High Reliability	66,427		12	%	74,056		15	%	87,693		19	%
Protection	198,866		34	%	209,726		44	%	195,683		43	%
Gennum	129,557		22	%	—		—	%	—		—	%
Total net sales	$	578,827	100	%	$	480,601	100	%	$	454,502	100	%

Net sales activity by geographic region is as follows:

	Fiscal Year Ended
(in thousands, except percentages)	January 27, 2013				January 29, 2012				January 30, 2011
North America	$	98,401	17	%	$	114,552	24	%	$	112,404	25	%
Asia-Pacific	405,179		70	%	298,477		62	%	272,079		60	%
Europe	75,247		13	%	67,572		14	%	70,019		15	%
Total net sales	$	578,827	100	%	$	480,601	100	%	$	454,502	100	%

The Company generally attributes sales to a country based on the ship-to address. The table below summarizes sales activity to countries that represented greater than 10% of total net sales for at least one of the periods indicated:

	Fiscal Year Ended
(percentage of total sales)	January 27, 2013		January 29, 2012		January 30, 2011
United States	17	%	20	%	23	%
China (including Hong Kong)	35	%	38	%	34	%
Japan	10	%	8	%	7	%
South Korea	7	%	8	%	10	%
Total net sales	69	%	74	%	74	%

The Company’s regional income (loss) from continuing operations before income taxes is as follows:

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Domestic	$	(19,867	)	$	(3,070	)	$	(12,540	)
Foreign	20,116			97,249			91,872
Total	$	249		$	94,179		$	79,332

Domestic (loss) from continuing operations includes amortization of acquired intangible assets, litigation related expenses and higher levels of stock-based compensation compared to foreign operations.

Long-lived Assets

Long-lived assets which consist of property, plant and equipment, net of accumulated depreciation are summarized as follows:

(in thousands)	January 27, 2013		January 29, 2012
Located within the United States	$	53,858	$	47,612
Located outside the United States	47,979		22,101
	$	101,837	$	69,713

Some of these assets are at locations owned or operated by the Company’s suppliers. The Company has consigned certain equipment to a foundry based in China to support its specialized processes run at the foundry. The Company has also installed its own equipment at some of its packaging and testing subcontractors in order to ensure a certain level of capacity, assuming the subcontractor has ample employees to operate the equipment.

The amount of equipment and machinery consigned to a foundry in China was $7.9 million and $9.4 million as of January 27, 2013 and January 29, 2012, respectively.

Significant Customers

Sales to the Company’s customers are generally made on open account, subject to credit limits the Company may impose, and the receivables are subject to the risk of being uncollectible.

Each of the following significant customers accounted for at least 10% of net sales for at least one of the periods indicated:

	Fiscal Year Ended
(percentage of net sales)	January 27, 2013		January 29, 2012		January 30, 2011
Samsung Electronics (and affiliates)	12	%	13	%	12	%
Huawei Technologies (and affiliates)	10	%	7	%	8	%
Frontek Technology Corp	6	%	10	%	11	%

The following table shows the list of customers that have an outstanding receivable balance that represents at least 10% of total net receivables for at least one of the periods indicated:

	Balance as of
(percentage of net accounts receivable)	January 27, 2013		January 29, 2012
Huawei Technologies (and affiliates)	14	%	11	%
Samsung Electronics (and affiliates)	12	%	14	%
Frontek Technology Corp	4	%	10	%
Dragon Technology	3	%	11	%

Outside Subcontractors and Suppliers

The Company relies on a limited number of outside subcontractors and suppliers for the production of silicon wafers, packaging and certain other tasks. Disruption or termination of supply sources or subcontractors, due to natural disasters such as an earthquake or other causes, could delay shipments and could have a material adverse effect on the Company. Although there are generally alternate sources for these materials and services, qualification of the alternate sources could cause delays sufficient to have a material adverse effect on the Company. Several of the Company’s outside subcontractors and suppliers, including third-party foundries that supply silicon wafers, are located in foreign countries, including China, Taiwan, Canada, Europe and Israel. The Company’s largest source of silicon wafers is an outside foundry located in China and a significant amount of the Company’s assembly and test operations are conducted by third-party contractors in China, Malaysia, Korea and the Philippines.

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Note 17: Reorganization Costs

During fiscal year 2013, reorganization costs mainly represent the severance costs associated with the integration of the acquired Gennum business with the Company’s pre-existing business and the consolidation of certain operations of the combined Company.

During the third quarter of fiscal year 2012, the Company initiated a reorganization plan which resulted in a consolidation of research and development activities and a reduction of its workforce.

There was no reorganization cost in fiscal year 2011.

The following table summarizes the reorganization charges incurred and liability balance included in “Accrued liabilities” on the consolidated balance sheet as of January 30, 2011, January 29, 2012 and January 27, 2013. The reorganization charges below were included in “Selling, general and administrative” on the consolidated statements of income for the respective periods.

(in thousands)	Severance and related costs
Balance at January 30, 2011	$	—
Reorganization charges	1,981
Cash payments	(1,965		)
Balance at January 29, 2012	16
Reorganization charges	13,387
Cash payments	(12,073		)
Balance at January 27, 2013	$	1,330

Note 18: Stock Repurchase Program and Shares Withheld from Vested Restricted Shares

On March 4, 2008, the Company announced that its Board of Directors authorized the repurchase of up to $50 million of the Company’s common stock from time to time through negotiated or open market transactions (the “2008 Program”). The 2008 Program does not have an expiration date. On August 24, 2011, the Company announced a $36 million expansion of the 2008 Program. On November 30, 2011, the Company announced an additional $50 million expansion of the 2008 Program.

In addition to repurchase activity under the 2008 Program, the Company typically withholds shares from vested restricted stock to pay employee payroll and income tax withholding liabilities.

The following table summarizes the stock repurchase activities and shares withheld from vested restricted shares during the periods indicated:

	Fiscal Year Ended
	January 27, 2013			January 29, 2012			January 30, 2011
(in thousands, except number of shares)	Shares	Value		Shares	Value		Shares	Value
Shares repurchased under the 2008 Program	263,443	$	7,500	2,252,099	$	50,000	74,702	$	1,258
Shares withheld from vested restricted shares	9,696	269		27,427	665		89,934	1,561
Total treasury shares acquired	273,139	$	7,769	2,279,526	$	50,665	164,636	$	2,819

The Company currently intends to hold the repurchased and withheld shares as treasury stock. The Company typically reissues treasury shares to settle stock option exercises and restricted share grants.

Note 19: Recent Accounting Pronouncements

In February 2013, the FASB issued an accounting standards update regarding the reporting of reclassifications out of accumulated other comprehensive income. This update, which will be effective prospectively for reporting periods beginning after December 15, 2012, requires disclosure of amounts reclassified out of accumulated other comprehensive income by component. In addition, an entity is required to present either on the face of the statement of operations or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income but only if the amount reclassified is required to be reclassified to net income in its entirety in the same reporting period. For amounts not reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures that provide additional detail about those amounts. The Company will adopt the disclosure requirements of this update for the quarter ending April 28, 2013.

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Note 20: Selected Quarterly Financial Data (Unaudited)

The following tables set forth the Company’s unaudited consolidated statements of income data for each of the eight quarterly periods ended January 27, 2013, as well as that data expressed as a percentage of the Company’s net sales for the quarters presented. The sum of quarterly per share amounts may differ from year to date amounts due to rounding.

Selected Quarterly Financial Data (Unaudited)

	Fiscal Year 2013												Fiscal Year 2012
	Quarters Ended												Quarters Ended
(in thousands, except per share amounts)	April 29, 2012			July 29, 2012			October 28, 2012			January 27, 2013			May 1, 2011			July 31, 2011			October 30, 2011			January 29, 2012
Net sales	$	116,642		$	150,704		$	160,878		$	150,603		$	122,371		$	130,254		$	123,944		$	104,032
Cost of sales	61,305			76,179			64,085			62,646			48,517			51,534			50,537			44,368
Gross profit	55,337			74,525			96,793			87,957			73,854			78,720			73,407			59,664
Operating costs and expenses:
Selling, general and administrative	44,818			31,220			35,646			37,386			26,705			22,481			25,110			26,333
Product development and engineering	24,083			32,613			33,354			29,959			18,525			22,228			20,489			19,335
Intangible amortization and impairments	5,578			7,977			8,212			8,177			2,102			2,103			4,573			2,075
Total operating costs and expenses	74,479			71,810			77,212			75,522			47,332			46,812			50,172			47,743
Operating (loss) income	(19,142		)	2,715			19,581			12,435			26,522			31,908			23,235			11,921
Interest expense	(1,843		)	(4,194		)	(4,172		)	(4,154		)	—			—			—			—
Interest income and other (expense) income, net	214			162			(1,071		)	(282		)	(440		)	(117		)	729			421
(Loss) income before taxes	(20,771		)	(1,317		)	14,338			7,999			26,082			31,791			23,964			12,342
(Benefit) provision for taxes	(22,980		)	(11,339		)	(2,252		)	(5,119		)	3,500			4,653			(3,015		)	(46		)
Net Income	$	2,209		$	10,022		$	16,590		$	13,118		$	22,582		$	27,138		$	26,979		$	12,388
Earnings per share:
Basic	$	0.03		$	0.15		$	0.25		$	0.20		$	0.35		$	0.41		$	0.41		$	0.19
Diluted	$	0.03		$	0.15		$	0.25		$	0.19		$	0.34		$	0.40		$	0.40		$	0.19
Weighted average number of shares used in computing earnings per share:
Basic	65,282			65,587			65,996			66,371			64,552			65,547			65,440			64,856
Diluted	67,233			67,165			67,465			67,984			67,123			68,186			67,314			66,776

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	Fiscal Year 2013								Fiscal Year 2012
	Quarters Ended								Quarters Ended
	April 29, 2012		July 29, 2012		October 28, 2012		January 27, 2013		May 1, 2011		July 31, 2011		October 30, 2011		January 29, 2012
Net sales	100	%	100	%	100	%	100	%	100	%	100	%	100	%	100	%
Cost of sales	53	%	50	%	40	%	42	%	40	%	40	%	41	%	43	%
Gross profit	47	%	50	%	60	%	58	%	60	%	60	%	59	%	57	%
Operating costs and expenses:
Selling, general and administrative	38	%	21	%	22	%	25	%	22	%	17	%	20	%	25	%
Product development and engineering	21	%	22	%	21	%	20	%	15	%	17	%	17	%	19	%
Intangible amortization and impairments	5	%	5	%	5	%	5	%	2	%	2	%	4	%	2	%
Total operating costs and expenses	64	%	48	%	48	%	50	%	39	%	36	%	41	%	46	%
Operating (loss) income	(17	)%	2	%	12	%	8	%	22	%	24	%	19	%	11	%
Interest expense	(2	)%	(3	)%	(3	)%	(3	)%	—	%	—	%	—	%	—	%
Interest income and other (expense) income, net	—	%	—	%	(1	)%	—	%	—	%	—	%	1	%	—	%
(Loss) income before taxes	(19	)%	(1	)%	8	%	5	%	22	%	24	%	20	%	11	%
(Benefit) provision for taxes	(20	)%	(8	)%	(1	)%	(3	)%	3	%	4	%	(2	)%	—	%
Net Income	1	%	7	%	9	%	8	%	19	%	20	%	22	%	11	%

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Item 9.         Changes in and Disagreements With Accountants on Accounting and Financial Disclosure

Not applicable.

Item 9A.     Controls and Procedures

Disclosure Controls and Procedures

The Company carried out an evaluation, under the supervision and with the participation of the Chief Executive Officer and Chief Financial Officer, of the effectiveness of the Company’s disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e)) as of January 27, 2013. Based on that evaluation, the Company’s Chief Executive Officer and Chief Financial Officer have concluded that such disclosure controls and procedures were effective as of such date.

Changes in Internal Controls

On March 20, 2012, the Company, through its wholly-owned subsidiary Semtech Canada Inc., completed the acquisition of all outstanding equity interests of Gennum, which operated under its own set of systems and internal controls. As of January 27, 2013, we completed transitioning Gennum’s processes to our internal control processes.

Other than with respect to our transition of Gennum to our systems and control environment as described above, during the quarter ended January 27, 2013, there was no change in our internal control over financial reporting identified in connection with the evaluation required by paragraph (d) of Rule 13a-15 or Rule 15d-15 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

Report of Management on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f) and 15d-15(f). Under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, we conducted an evaluation of the effectiveness of our internal control over financial reporting based on the framework set forth in Internal Control - Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on our evaluation under the framework in Internal Control – Integrated Framework, our management has concluded that as of January 27, 2013 the Company’s internal control over financial reporting was effective to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles.

Ernst & Young LLP, the independent registered public accounting firm that audited the consolidated financial statements included in this report, has issued an attestation report on our internal control over financial reporting as of January 27, 2013. Ernst & Young LLP’s attestation report is included below.

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Report of Independent Registered Public Accounting Firm

The Board of Directors and Stockholders of Semtech Corporation

We have audited Semtech Corporation and subsidiaries’ internal control over financial reporting as of January 27, 2013, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (the COSO criteria). Semtech Corporation and subsidiaries' management is responsible for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Report of Management on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the company's internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company's internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of the company's assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, Semtech Corporation and subsidiaries maintained, in all material respects, effective internal control over financial reporting as of January 27, 2013, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of Semtech Corporation and subsidiaries as of January 27, 2013 and January 29, 2012, and the related consolidated statements of income, comprehensive income, stockholders' equity, and cash flows for each of the three years in the period ended January 27, 2013 and the financial statement schedule listed in the Index at Item 15(a) of Semtech Corporation and subsidiaries and our report dated March 28, 2013, expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP

Los Angeles, California

March 28, 2013

Item 9B.     Other Information

We believe that all information that was required to be disclosed in a report on Form 8-K during the fourth quarter of fiscal year 2013 was reported on a Form 8-K during that period.

PART III

Item 10.     Directors, Executive Officers and Corporate Governance

We have adopted a written Code of Conduct that applies to everyone in the Company, including our Chief Executive Officer, Chief Financial Officer and Controller. Our Code of Conduct serves as our written code of ethics for those officers, and for persons performing similar functions. Our current Code of Conduct is incorporated in this Annual Report on Form 10-K for

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fiscal year 2013 as Exhibit 14. The Code of Conduct is also available at the Corporate Governance section of the Investors page on our website at www.semtech.com. Alternatively, you can request a copy of the Code of Conduct free of charge by sending a written request to the Company’s Secretary at 200 Flynn Road, Camarillo, CA 93012. If we make any substantive amendments to the Code of Conduct or grant any waiver, including an implicit waiver, from the Code of Conduct to our Chief Executive Officer, Chief Financial Officer or Controller, we will within four business days of the event disclose the nature of the amendment or waiver on our website or in a report on Form 8-K.

The information relating to our directors, our nominees for directors, and our executive officers pursuant to Items 401; and Item 407(c)(3), (d)(4) and (d)(5) of Regulation S-K required by this item will be contained under the caption “Proposal 1: Election of Directors” in our Definitive Proxy Statement relating to our annual meeting of stockholders to be held on June 20, 2013, to be filed with the SEC pursuant to Regulation 14A of the Exchange Act and is hereby specifically incorporated by reference thereto.

The information required pursuant to Item 405 of Regulation S-K will be contained under the caption “Section 16(a) Beneficial Ownership Reporting Compliance” in our Definitive Proxy Statement relating to our annual meeting of stockholders, to be held on June 20, 2013, to be filed with the SEC pursuant to Regulation 14A of the Exchange Act and is hereby specifically incorporated by reference thereto.

Item 11.        Executive Compensation

The information required under this item will appear under the captions “Director Compensation,” “Compensation Discussion and Analysis”, “Executive Compensation” and related discussion and disclosure thereto, in the Definitive Proxy Statement relating to our annual meeting of stockholders to be held on June 20, 2013, to be filed by us with the SEC pursuant to Regulation 14A of the Exchange Act, and is hereby specifically incorporated herein by reference thereto.

Item 12.     Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

The information required under this item will appear under the captions “Beneficial Ownership of Securities,” “Securities Authorized for Issuance under Equity Compensation Plans” and related discussion and disclosure thereto, in the Definitive Proxy Statement relating to our annual meeting of stockholders to be held on June 20, 2013, to be filed by us with the SEC pursuant to Regulation 14A of the Exchange Act, and is hereby specifically incorporated herein by reference thereto.

Item 13.     Certain Relationships and Related Transactions, and Director Independence

The information required under this item will appear under the captions “Election of Directors (Proposal Number 1)” “Corporate Governance, Transactions with Related Parties” and related discussion and disclosure thereto, in the Definitive Proxy Statement relating to our annual meeting of stockholders to be held on June 20, 2013, to be filed by us with the SEC pursuant to Regulation 14A of the Exchange Act, and is hereby specifically incorporated herein by reference thereto.

Item 14.        Principal Accounting Fees and Services

The information required under this item will appear under the captions “Independent Accountant Fees,” and “Policy on Audit Committee Pre-Approval of Audit and Permissible Non-Audit Services” and related discussion and disclosure thereto, in the Definitive Proxy Statement relating to our annual meeting of stockholders to be held on June 20, 2013, to be filed by us with the SEC pursuant to Regulation 14A of the Exchange Act, and is hereby specifically incorporated herein by reference thereto.

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PART IV

Item 15.        Exhibits, Financial Statement Schedules

(a)(1) The financial statements, schedules, and reports included in this Form 10-K are listed in the index under Item 8 in this report.

(a)(2) Schedules other than those listed in Item 8 are omitted since they are not applicable, not required, or the information required to be set forth herein is included in the consolidated financial statements or notes thereto.

SCHEDULE II

SEMTECH CORPORATION AND SUBSIDIARIES

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

THREE YEARS ENDED JANUARY 27, 2013

	Balance at Beginning of Year		Charged (Reversal) to Costs and Expenses		Deductions			Balance at End of Year
Year ended January 30, 2011
Allowance for doubtful accounts	$	1,302,000	$	53,924	$	(247,703	)	$	1,108,221
Year ended January 29, 2012
Allowance for doubtful accounts	$	1,108,221	$	332,154	$	(887,500	)	$	552,875
Year ended January 27, 2013
Allowance for doubtful accounts	$	552,875	$	40,820	$	—		$	593,695

(a)(3) Exhibits. These exhibits are available without charge upon written request directed to the Company’s Secretary at 200 Flynn Road, Camarillo, CA 93012. Documents that are not physically filed with this report are incorporated herein by reference to the location indicated.

Exhibit No.		Description	Location
2.1		Agreement and Plan of Merger, dated November 18, 2009, by and among Semtech Corporation, Sierra Monolithics, Inc., SMI Merger Corp. and Shareholder Representative Services	Exhibit 2.1 to the Company’s Current Report on Form 8-K filed December 15, 2009
2.2		First Amendment to Agreement and Plan of Merger, dated December 9, 2009, by and among Semtech Corporation, Sierra Monolithics, Inc., SMI Merger Corp. and Shareholder Representative Services	Exhibit 10.1 to the Company’s Current Report on Form 8-K filed December 15, 2009
2.3		Arrangement Agreement, dated as of January 23, 2012, among Semtech Corporation, Semtech Canada Inc. and Gennum Corporation	Exhibit 2.1 to the Company’s Amendment No. 1 to the Current Report on Form 8-K/A/ filed January 26, 2012
3.1		Restated Certificate of Incorporation of Semtech Corporation	Exhibit 3.1 to the Company’s Quarterly Report on Form 10-Q for the quarterly period ended October 26, 2003
3.2		Bylaws of Semtech Corporation	Exhibit 3.2 to the Company’s Annual Report on Form 10-K for the fiscal year ended January 27, 2008
10.1	*	The Company’s Long-Term Stock Incentive Plan, as amended and restated	Exhibit 10.6 to the Company’s Annual Report on Form 10-K for the fiscal year ended January 28, 2007
10.2	*	The Company’s Non-Director and Non-Executive Officer Long-Term Stock Incentive Plan, as amended and restated	Exhibit 10.4 to the Company’s Quarterly Report on Form 10-Q/A for the quarterly period ended October 29, 2006

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10.3	*	Form of Long Term Stock Incentive Plan Award Agreement for Options Awarded to Non-Employee Directors on December 5, 2002	Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q for the quarterly period ended October 27, 2002
10.4	*	Form of Long-Term Stock Incentive Plan Award Agreement (Non-Employee Directors)	Exhibit 10.1 to the Company’s Current Report on Form 8-K filed July 7, 2006
10.5	*	Form of Long-Term Stock Incentive Plan Award Agreement (Executive Officers)	Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q for the quarterly period ended July 25, 2004
10.6	*	Form of Non-Director and Non-Executive Officer Long-Term Stock Incentive Plan Award Agreement	Exhibit 10.3 to the Company’s Quarterly Report on Form 10-Q for the quarterly period ended July 25, 2004
10.7	*	Form of Long-Term Stock Incentive Plan Award Certificate	Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q/A for the quarterly period ended October 29, 2006
10.8	*	Form of Non-Director and Non-Executive Officer Long-Term Stock Incentive Plan Award Certificate	Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q/A for the quarterly period ended October 29, 2006
10.9	*	Adoption Agreement adopting The Executive Nonqualified “Excess” Plan (known as the Semtech Executive Compensation Plan) as amended and restated effective January 1, 2005	Exhibit 10.11 to the Company’s Quarterly Report on Form 10-Q for the quarterly period ended July 29, 2007
10.10	*	Amended and Restated Plan Document for The Executive Nonqualified “Excess” Plan (known as the Semtech Executive Compensation Plan), effective January 1, 2005	Exhibit 10.12 to the Company’s Quarterly Report on Form 10-Q for the quarterly period ended July 29, 2007
10.11		Trust Agreement dated as of January 1, 2004 between Semtech Corporation and Bankers Trust Company, as Trustee, related to the Semtech Executive Compensation Plan	Exhibit 10.14 to the Company’s Annual Report on Form 10-K for the fiscal year ended January 25, 2004
10.12		Form of Indemnification Agreement for Directors and Executive Officers	Exhibit 10.1 to the Company’s Current Report on Form 8-K filed November 24, 2010
10.13	*	Semtech Corporation Bonus Plan, amended and restated effective January 29, 2007 (also known as the “Executive Bonus Plan”)	Exhibit 10.1 to the Company’s Current Report on Form 8-K filed June 12, 2007
10.14	*	Employment Offer Letter to Mohan Maheswaran, accepted as of March 12, 2006	Exhibit 10.1 to the Company’s Current Report on Form 8-K filed March 14, 2006
10.15	*	Employment Offer Letter to Emeka Chukwu, accepted as of November 11, 2006	Exhibit 10.26 to the Company’s Annual Report on Form 10-K for the fiscal year ended January 28, 2007
10.16	*	Memo to Emeka Chukwu dated, April 5, 2007	Exhibit 10.27 to the Company’s Annual Report on Form 10-K for the fiscal year ended January 28, 2007
10.17	*	Form of Long-Term Stock Incentive Plan Option Award Certificate	Exhibit 10.2 to the Company’s Current Report on Form 8-K filed June 12, 2007
10.18	*	Form of Long-Term Stock Incentive Plan Restricted Stock Award Certificate	Exhibit 10.3 to the Company’s Current Report on Form 8-K filed June 12, 2007
10.19	*	Form of Long-Term Stock Incentive Plan Performance Unit Award Certificate	Exhibit 10.4 to the Company’s Current Report on Form 8-K filed June 12, 2007
10.20	*	Form of Long-Term Stock Incentive Plan Option Award Certificate (Non-Employee Directors)	Exhibit 10.5 to the Company’s Current Report on Form 8-K filed June 12, 2007
10.21	*	Form of Long-Term Stock Incentive Plan Non-Employee Director Stock Unit Award Certificate	Exhibit 10.1 to the Company’s Current Report on Form 8-K filed June 19, 2007

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10.22	*	Form of Long-Term Stock Incentive Plan Restricted Stock Unit Award Certificate	Exhibit 10.1 to the Company’s Current Report on Form 8-K filed March 20, 2008
10.23		Semtech Corporation Executive Stock Ownership Guidelines	Exhibit 10.39 to the Company’s Annual Report on Form 10-K for the fiscal year ended January 27, 2008
10.24		Semtech Corporation Director Stock Ownership Guidelines	Exhibit 10.7 to the Company’s Current Report on Form 8-K filed on July 1, 2008
10.25	*	Semtech Corporation 2008 Long-Term Equity Incentive Plan	Exhibit 10.40 to the Company’s Annual Report on Form 10-K for the fiscal year ended January 27, 2008
10.26	*	Restricted Stock Unit Award Agreement Cycleo Acquisition	Exhibit 10.26 to the Company's Annual Report on Form 10-K for the fiscal year ended January 29, 2012
10.27		Form of Semtech Corporation 2008 Long-Term Equity Incentive Plan Option Award Agreement for Non-Employee Directors	Exhibit 10.3 to the Company’s Current Report on Form 8-K filed July 1, 2008
10.28		Form of Semtech Corporation 2008 Long-Term Equity Incentive Plan Option Award Agreement for Non-Employee Directors	Exhibit 10.4 to the Company’s Current Report on Form 8-K filed July 1, 2008
10.29	*	Form of Semtech Corporation 2008 Long-Term Equity Incentive Plan Option Award Agreement for Non-Employee Directors	Exhibit 10.5 to the Company’s Current Report on Form 8-K filed July 1, 2008
10.30	*	Form of Semtech Corporation 2008 Long-Term Equity Incentive Plan Option Award Agreement for Non-Employee Directors	Exhibit 10.5 to the Company’s Quarterly Report on Form 10-Q for the quarter ended May 1, 2011
10.31	*	Semtech Corporation Chief Executive Officer Bonus Plan, as amended on February 28, 2012	Exhibit 10.31 to the Company's Annual Report on Form 10-K for the fiscal year ended January 29, 2012.
10.32	*	Semtech Corporation 2007 SMI Assumed Plan	Exhibit 4.3 to the Company’s Registration Statement on Form S-8, Registration No. 333-163780, filed on December 16, 2009
10.33	*	Semtech Corporation 2000 SMI Assumed Plan	Exhibit 4.2 to the Company’s Registration Statement on Form S-8, Registration No. 333-163780, filed on December 16, 2009
10.34	*	Semtech Corporation 2009 Long-Term Equity Inducement Plan	Exhibit 10.2 to the Company’s Current Report on Form 8-K filed December 15, 2009
10.35	*	Form of Semtech Corporation 2009 Long-Term Equity Inducement Plan Award Agreements (Performance-Based Vesting)	Exhibit 10.37 to the Company’s Annual Report on Form 10-K for the fiscal year ended January 31, 2010
10.36	*	Form of Semtech Corporation 2009 Long-Term Equity Inducement Plan Award Agreements (Time-Based Vesting)	Exhibit 10.38 to the Company’s Annual Report on Form 10-K for the fiscal year ended January 31, 2010
10.37	*	Restricted Stock Award Agreement dated March 29, 2010 with respect to time-based restricted stock award to Mohan Maheswaran	Exhibit 10.1 to the Company’s Current Report on Form 8-K filed March 31, 2011
10.38		Master Confirmation dated May 30, 2007 between Semtech Corporation and Goldman, Sachs & Co.	Exhibit 10.1 to the Company’s Current Report on Form 8-K filed June 1, 2007

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10.39		Supplemental Confirmation dated May 30, 2007 between Semtech Corporation and Goldman, Sachs & Co.	Exhibit 10.2 to the Company’s Current Report on Form 8-K filed June 1, 2007
10.40	*	Semtech Corporation Executive Change in Control Retention Plan	Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on October 1, 2010
10.41	*	Amended and Restated Semtech Corporation Executive Change in Control Retention Plan	Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q for the quarter ended May 1, 2011
10.42	*	Form of Participation Agreement under the Semtech Corporation Executive Change in Control Retention Plan for non-Swiss employees	Exhibit 10.2 to the Company’s Current Report on Form 8-K filed on October 1, 2010
10.43	*	Form of Participation Agreement under the Semtech Corporation Executive Change in Control Retention Plan for Swiss employees	Exhibit 10.3 to the Company’s Current Report on Form 8-K filed on October 1, 2010
10.44	*	Semtech Nonqualified Executive Compensation Plan Adoption Agreement and Plan Document, as amended and restated effective October 12, 2007	Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q for the quarter ended July 31, 2011
10.45		Credit Agreement dated March 20, 2012 entered into among Semtech Corporation, the lenders referred to therein and Jefferies Finance LLC. as administrative agent	Exhibit 10.1 to our Current Report on Form 8-K filed on March 23, 2012
10.46		Severance and Release Agreement, effective as of September 20, 2012, between Semtech Corporation and David Schie	Exhibit 10.1 to our Current Report on Form 8-K filed on September 21, 2012
10.47		Policy Regarding Director Compensation	Exhibit 10.45 to the Company’s Annual Report on Form 10-K for the fiscal year ended January 29, 2012
10.48	*	Semtech Corporation Chief Executive Officer Bonus Plan, effective January 28, 2013	Filed herewith
14		Semtech Corporation Code of Conduct	Exhibit 14.1 to the Company’s Current Report on Form 8-K filed June 25, 2010
21.1		Subsidiaries of the Company	Filed herewith
23.1		Consent of Independent Registered Public Accounting Firm	Filed herewith
31.1		Certification of the Chief Executive Officer Pursuant to Rule 13a-14(a) or Rule 15d-14(a) under the Securities Exchange Act of 1934 as amended.	Filed herewith
31.2		Certification of the Chief Financial Officer Pursuant to Rule 13a-14(a) or Rule 15d-14(a) under the Securities Exchange Act of 1934 as amended.	Filed herewith
32.1		Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350 as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act Of 2002 (As set forth in Exhibit 32.1 hereof, Exhibit 32.1 is being furnished and shall not be deemed “filed”.)	Filed herewith
32.2		Certification of the Chief Financial Officer Pursuant 18 U.S.C. §1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (Exhibit 32.2 is being furnished and shall not be deemed “filed”)	Filed herewith
101.INS		XBRL Instance Document **	Filed herewith
101.SCH		XBRL Taxonomy Extension Schema Document**	Filed herewith
101.CAL		XBRL Taxonomy Extension Calculation Linkbase Document**	Filed herewith
101.DEF		XBRL Taxonomy Extension Definition Linkbase Document**	Filed herewith

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101.LAB	XBRL Taxonomy Extension Label Linkbase Document**	Filed herewith
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document**	Filed herewith

* Management contract or compensatory plan or arrangement.

** Pursuant to Rule 406T of Regulation S-T, the Interactive Data Files on Exhibit 101 hereto are deemed not filed or part of a registration statement or prospectus for purposes of Sections 11 or 12 of the Securities Act of 1933, as amended, are deemed not filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and otherwise are not subject to liability under those sections.

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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	Semtech Corporation
Date: March 28, 2013	/s/ Mohan R. Maheswaran
	Mohan R. Maheswaran
	President and Chief Executive Officer

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

Date: March 28, 2013	/s/ Mohan R. Maheswaran
	Mohan R. Maheswaran
	President and Chief Executive Officer
	Director
Date: March 28, 2013	/s/ Emeka N. Chukwu
	Emeka N. Chukwu
	Senior Vice President and Chief Financial Officer
	(Principal Accounting and Financial Officer)
Date: March 28, 2013	/s/ Rockell N. Hankin
	Rockell N. Hankin
	Chairman of the Board
Date: March 28, 2013	/s/ Glen M. Antle
	Glen M. Antle
	Director
Date: March 28, 2013	/s/ W. Dean Baker
	W. Dean Baker
	Director
Date: March 28, 2013	/s/ James P. Burra
	James P. Burra
	Director
Date: March 28, 2013	/s/ Bruce C. Edwards
	Bruce C. Edwards
	Director
Date: March 28, 2013	/s/ James T. Lindstrom
	James T. Lindstrom
	Director
Date: March 28, 2013	/s/ John L. Piotrowski
	John L. Piotrowski
	Director

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EX-10.48

Exhibit 10.48

SEMTECH CORPORATION

CHIEF EXECUTIVE OFFICER BONUS PLAN

ARTICLE I

PURPOSE OF THE PLAN

This Plan is established to provide a further incentive to the Chief Executive Officer (the “CEO”) of Semtech Corporation (the “Company”) to promote the success of the Company by providing an opportunity to receive additional compensation for beyond normal expected performance measured against corporate goals. The Plan is intended to achieve the following:

1. Stimulate the CEO to work to meet objectives consistent with enhancing the Company’s shareholder value.

2. Facilitate the Company’s ability to attract, retain, and motivate the CEO.

3. Help ensure that the CEO is held accountable, and appropriately rewarded, for both organizational and individual performance.

ARTICLE II

DEFINITIONS

1. ANNUAL SALARY — The regular annualized rate of base salary of the CEO at the time of calculation of the incentive award payment, but excluding any incentive compensation, commissions, over-time payments, option exercise income, the value of restricted stock vesting, retroactive payments not affecting the base salary or applicable to the current year, and any other payments of compensation of any kind.

2. BOARD — The Board of Directors of the Company.

3. APPROVED BUSINESS PLAN — The Company’s Annual Business Plan.

4. COMMITTEE — The Compensation Committee of the Board of Directors as from time to time appointed or constituted by the Board of Directors.

5. COMPANY — Semtech Corporation and those subsidiaries of which it owns directly or indirectly 50% or more of the voting stock or other equity interests.

6. OPERATING INCOME – Operating income of the Company for the fiscal year as calculated under GAAP, with such adjustments (i) to take into account or disregard any items or events that the Committee determines in its discretion to be non-recurring or extraordinary and (ii) as the Committee determines to be necessary to best reflect the operating income from ordinary business operations.

7. PLAN — This Semtech Corporation CEO Bonus Plan.

8. PLAN YEAR — The Company’s fiscal year which ends on the last Sunday of January of each year.

ARTICLE III

ELIGIBILITY FOR PARTICIPATION

The Company’s Chief Executive Officer is the only person eligible to participate in this Plan.

ARTICLE IV

INCENTIVE COMPENSATION PAYMENTS

1. CALCULATION AND AUTHORIZATION OF AWARDS — Any incentive compensation award (an “Award”) under the Plan shall be calculated, under the supervision of the Chief Financial Officer, in accordance with the formula and procedures set forth in Exhibit A hereto and will be recommended to the Committee for its consideration. No Award is payable for any Plan Year unless and until the Committee authorizes the Award.

2. INCENTIVE COMPENSATION FACTORS – Awards under this Plan shall be based on the Company Performance Factors and the Individual Performance Factors that are set forth in the attached Exhibit A.

3. The Committee may change the method for calculating Plan payments at any time prior to the end of a Plan Year.

4. METHOD AND TIME OF PAYMENT

A. Awards authorized with respect to each Plan Year shall be paid to the CEO in cash following the close of the Plan Year and within two and one-half months after the close of the Plan Year. Awards generally shall be made only to the CEO if he/she is in the employ of the Company on the date of payment or to the estate of or beneficiaries designated by a CEO if the CEO has died at the time of the scheduled payment of any award.

B. In addition, in its sole discretion the Committee may authorize an award to the CEO if the CEO terminates employment after the close of the Plan Year but before awards are paid or a pro-rated award to the CEO if the CEO terminates employment during a Plan Year.

C. All Incentive compensation payments shall be made in cash and paid net of any taxes or other amounts required to be withheld.

5. CLAW-BACK RELATING TO FINANCIAL RESTATEMENT – Each Award to the CEO pursuant to the Plan shall be subject to the right of the Company to recover the payment (and reasonable interest thereon) in the event that the Committee determines in good faith that any fraud or misconduct by the CEO has caused or partially caused the need for a material restatement of the Company’s financial statements for the Plan Year to which the Plan payment relates. The Committee’s decision regarding whether the CEO has forfeited awards is final and binding in the absence of demonstrable fraud or bad faith on the part of the Committee in making such a decision.

6. RIGHTS OF PARTICIPANTS

A. All Awards are subject to the discretion of the Committee. The CEO shall have no right to require the Committee to authorize Award under the Plan. Even though the CEO’s performance may be assessed periodically during the Plan Year and/or the progress of Operating Income, Revenue performance or performance relative to peers may be tracked, all Awards are subject to calculation as set forth in Exhibit A and the discretion of the Committee. The mere existence of periodic assessments or tracking does not give the CEO any basis for claiming any incentive compensation under this Plan on a pro rata basis during the Plan Year or otherwise.

B. Payments properly made under the Plan and distributed to the CEO shall not be recoverable from the CEO by the Company, except as specifically provided under Section 5 of this Article V or as otherwise required by applicable law.

C.	Nothing in this Plan gives the CEO the right to remain in the employ of the Company. Except to the extent explicitly provided otherwise in a then effective writing executed by the CEO and the
	Company, the CEO is an at will employee whose employment may be terminated without liability at any time for any reason.

ARTICLE V

ADMINISTRATION

The Plan shall be administered under the direction of the Committee. The Committee shall have the right to construe the Plan, to interpret any provision of the Plan, to make rules and regulations relating to the Plan, and to determine any factual question arising in connection with the Plan’s operation after such investigation or hearing as the Committee may deem appropriate. Any decision made by the Committee under the provisions of this Article shall be conclusive and binding on all parties concerned. The Committee may delegate to the officers or employees of the Company the authority to execute and deliver those instruments and documents, to do all acts and things, and to take all other steps deemed necessary, advisable or convenient for the effective administration of this Plan in accordance with its terms and purpose.

ARTICLE VI

AMENDMENT OR TERMINATION OF PLAN

The Board or the Committee shall have the unilateral right to terminate or amend this Plan at any time.

ARTICLE VII

EFFECTIVE DATE

This Plan shall be effective beginning with the Company’s 2014 fiscal year.

EXHIBIT A

CALCULATION OF CASH BONUS INCENTIVE PROGRAM PAYMENTS

A. AWARD FORMULA

1. It is expected that the business objectives established for this Plan will be accomplished in accordance with the Company’s Core Values and Code of Conduct. The CEO’s commitment and adherence to the Company’s values and ethical standards will be considered in determining awards under this Plan.

2. The CEO’s “Target Award” for a Plan Year is determined by multiplying the Annual Salary by the applicable “Target Level” (as determined pursuant to Section B below). The actual amount of an Award payable with respect to a Plan Year shall be as determined in Section A.3 below. However, anything in the Plan to the contrary notwithstanding, in no event shall any Award exceed 200% of the Annual Salary for any given Plan Year.

3. Subject to any discretionary adjustments made pursuant to the Plan and to any limitations contained in the Plan and this Exhibit A, the actual Award amount payable to the CEO for any Plan Year pursuant to the terms of this Plan shall be calculated by multiplying the CEO’s Target Award by the sum of

a. 35% of the Operating Income Performance Factor determined in accordance with Section C and the table in the Operating Income Appendix adopted by the Committee for the applicable Plan Year (with pro rata adjustments being made for whole percentage increments between the levels stated in the table);

b. 25% of the Revenue Performance Factor determined in accordance with Section D below;

c. 20% of the Performance Relative to Peers Factor determined in accordance with Section E below; and

d. 20% of the Individual Performance Factor as defined in Section F below.

4. In the event the Target Level changes during the Plan Year, the Award recommended to the Committee will be based on the Target Level in effect when the calculation is made.

B. TARGET LEVEL

The Target Level shall be set by the Committee at its first regularly scheduled quarterly meeting for the Fiscal Year, subject to change during the Plan Year at the Committee’s discretion. The CEO’s Target Level for a Plan Year is set forth in the Target Level Appendix established by the Committee for that Plan Year.

C. OPERATING INCOME

After the end of the Plan Year, the Operating Income for the Plan Year, as determined by the Committee, shall be compared against the fiscal year plan targets, and used to determine the Operating Income Performance Factor level to be used pursuant to the table set forth in the Operating Income Appendix established for that Plan Year. Pro rata adjustments will be made for whole percentage increments between the levels stated in the table.

D. REVENUE PERFORMANCE FACTOR

The Revenue Performance Factor for the Plan Year shall be calculated as follows:

Revenue Performance Factor = 100% X (Net Revenue – Prior FY Net Revenue) / (ABP Net Revenue – Prior FY Net Revenue)

For purposes of the above equation, the following definitions apply:

“Net Revenue” means the Company’s Net Revenue for the applicable Plan Year, as determined by the Committee;

“Prior FY Net Revenue” means the Company’s Net Revenue for the fiscal year prior to the applicable Plan Year, as determined by the Committee; and

“ABP Net Revenue” means the Company’s projected Net Revenue for the applicable Plan Year as set forth in the Approved Business Plan for the applicable Plan Year.

However, the Revenue Performance Factor shall be subject to a maximum of 200%.

E. PERFORMANCE RELATIVE TO PEERS FACTOR

The Performance Relative to Peers Factor will be based on the Company’s Revenue Growth and Earnings Per Share Growth, each performance measure is calculated as a percentage growth ,each as determined by the Committee, relative to that of a pre-determined list of peer companies (the “Peer Group”), to be specified at the beginning of each Plan Year, and set forth in the Peer Group Appendix for the applicable Plan Year provided however, that the Committee shall not consider the performance of Peer Group members with negative earnings, even if they have positive Earnings Per Share.

The Performance Relative to Peers Factor will be determined according to the table provided in the Peer Group Appendix.

F. INDIVIDUAL PERFORMANCE FACTOR

After the end of each fiscal year, the CEO’s performance will be assessed by the Board (or the Committee to the extent the Board delegates such responsibility to the Committee), based on such factors as the Board (or Committee) may determine to be appropriate (which may include, without limitation, leadership and contribution to the Company). The performance assessment will be considered by the Committee in determining the Individual Performance Factor, which shall be subject to a maximum of 200%.

SEMTECH CORPORATION

CEO BONUS PLAN

APPENDICES

A. OPERATING INCOME APPENDIX FOR FISCAL YEAR 2014

Adopted by the Compensation Committee on February 26, 2013

FY 2014 Plan Achievement	Operating Income Performance Factor
85%	50%
95%	70%
100%	100%
120%	140%
130%	150%
150% or above	200%

For purposes of this Appendix, Operating Income for each fiscal year is as determined by the Committee in accordance with Exhibit A of the Plan.

B. TARGET LEVEL APPENDIX

For Fiscal Year 2014, the CEO’s Target Level is 125% of the CEO’s annual base salary.

C. PEER GROUP APPENDIX FOR FISCAL YEAR 2014

The Peer Group for Fiscal Year 2014 shall be the following companies:

Monolithic Power Systems. (MPWR)

Linear Technology Corp. (LLTC)

Intersil Corp. (ISIL)

Maxim Integrated Products Inc. (MXIM)

Ixys Corp (IXYS)

Microsemi Corp. (MSCC)

Fairchild. ( FCS )

On Semiconductor. ( ONNN)

Texas Instruments. (TXN)

Integrated Device Technology ( IDTI)

The Performance Relative to Peers Factor for Fiscal Year 2014 will be determined according to the following table:

Company Revenue Growth Ranking, Relative to Peer Group	Company Earnings Per Share Growth Ranking, Relative to Peer Group	Performance Relative to Peers Factor
Below 50th percentile	Below 50th percentile	0%
Below 50th percentile	At or above 50th percentile	50%
At or above 50th percentile	Below 50th percentile	50%
At or above 50th percentile, but less than 75th percentile	At or above 50th percentile, but less than  75th percentile	100%
At or above 75th percentile	At or above 50th percentile, but less than 75th percentile	150%
At or above 50th percentile, but less than 75th percentile	At or above 75th percentile	150%
At or above 75th percentile	At or above 75th percentile	200%

EX-21.1

Exhibit 21.1

Subsidiaries of Semtech Corporation

• Gennum US Holdings Limited (Delaware)

• Gennum US Limited (Delaware)

• Semtech Corpus Christi Corporation (Texas)

• Semtech New York Corporation (Delaware)

• Semtech San Diego Corporation (California)

• Sierra Monolithics, Inc. (California)

• Gennum Canada Limited (Ontario, Canada)

• Semtech Canada Corporation (Nova Scotia, Canada)

• Semtech Semiconductor (Chengdu) Co. Ltd. (China)

• Semtech Semiconductor (Shanghai) Co. Ltd. (China)

• Semtech Semiconductor (Shenzhen) Company Limited (China)

• Cycleo SAS (France)

• Nanoscale SAS (France)

• Semtech France SARL (France)

• Semtech Holdings France SAS (France)

• Semtech Germany GmbH (Germany)

• Semtech Semiconductor Holdings Limited (Hong Kong)

• Semtech Advanced Systems India Private Limited (India)

• Gennum Japan Kabushiki Kaisha (Japan)

• Semtech Semiconductor (Malaysia) Sdn Bhd

• Semtech Corpus Christi S.A. de CV (Mexico)

• Snowbush Mexico S.A.P.I. de C.V. – 99.9%

• Semtech Netherlands BV (Netherlands)

• Semtech (International) AG (Switzerland)

• Semtech Neuchatel SARL (Switzerland)

• Semtech Switzerland GmbH (Switzerland)

• Gennum UK Limited (United Kingdom)

• Nanotech Semiconductor Limited (United Kingdom)

• Semtech EMEA Ltd (United Kingdom)

• Semtech Limited (United Kingdom)

EX-23.1

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the following Registration Statements:

• Registration Statement (Form S-8 No. 333-44033) pertaining to the 1994 Long-Term Stock Incentive Plan of Semtech Corporation;

• Registration Statement (Form S-8 No. 333-80319) pertaining to the Long-Term Stock Incentive Plan of Semtech Corporation;

• Registration Statement (Form S-3 No. 333-95183) of Semtech Corporation;

• Registration Statement (Form S-8 No. 333-50448) pertaining to the Non-Director and Non-Executive Officer Long-Term Stock Incentive Plan of Semtech Corporation;

• Registration Statement (Form S-8 No. 333-118802) pertaining to non-qualified stock option grants under the Long-Term Incentive Plan of Semtech Corporation;

• Registration Statement (Form S-8 No. 333-142153) pertaining to non-qualified stock option grants and restricted stock awards;

• Registration Statement (Form S-8 No. 333-60396) pertaining to the Non-Director and Non-Executive Officer Long-Term Stock Incentive Plan of Semtech Corporation with respect to the registration of 4,000,000 shares of the Semtech Corporation's common stock (3,048,342 of which shares were subsequently deregistered pursuant to Post-Effective Amendment No. 1 to Form S-8 filed August 11, 2008);

• Registration Statement (Form S-8 No. 333-60396) pertaining to Semtech Corporation's Non-Qualified Stock Option Grants made to certain executive officers;

• Registration Statement (Form S-8 No. 333-118804) pertaining to the Long-Term Stock Incentive Plan of Semtech Corporation with respect to the registration of 4,902,200 shares of the Semtech Corporation's common stock (645,195 of which shares were subsequently deregistered pursuant to Post-Effective Amendment No. 1 to Form S-8 filed August 11, 2008);

• Registration Statement (Form S-8 No. 333-152939) pertaining to the 2008 Long-Term Equity Incentive Plan of Semtech Corporation; and

• Registration Statement (Form S-8 No. 333-163780) pertaining to the 2009 Long-Term Equity Inducement Plan of Semtech Corporation, the 2000 SMI Assumed Plan of Semtech Corporation, and the 2007 SMI Assumed Plan of Semtech Corporation.

of our reports dated March 28, 2013, with respect to the consolidated financial statements and financial statement schedule of Semtech Corporation and the effectiveness of internal control over financial reporting of Semtech Corporation included in this Annual Report (Form 10-K) of Semtech Corporation for the year ended January 27, 2013.

/s/ Ernst & Young LLP

Los Angeles, California

March 28, 2013

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Mohan R. Maheswaran, certify that:

1. I have reviewed this annual report on Form 10-K of Semtech Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: March 28, 2013

/s/ Mohan R. Maheswaran

Mohan R. Maheswaran

President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Emeka N. Chukwu, certify that:

1. I have reviewed this annual report on Form 10-K of Semtech Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: March 28, 2013

/s/ Emeka N. Chukwu

Emeka N. Chukwu

Senior Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Semtech Corporation (the “Company”) on Form 10-K for the fiscal year ended January 27, 2013 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Mohan R. Maheswaran, Chief Executive Officer of the Company, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: March 28, 2013

/s/ Mohan R. Maheswaran

Mohan R. Maheswaran

President and Chief Executive Officer

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to Semtech Corporation and will be retained by Semtech Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

The information contained in this Exhibit 32.1 is being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. The information in this Exhibit 32.1 shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Exchange Act of 1934, as amended, or the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference to this Exhibit 32.1 in such filing.

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Semtech Corporation (the “Company”) on Form 10-K for the fiscal year ended January 27, 2013 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Emeka N. Chukwu, Chief Financial Officer of the Company, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: March 28, 2013

/s/ Emeka N. Chukwu

Emeka N. Chukwu

Senior Vice President and Chief Financial Officer

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to Semtech Corporation and will be retained by Semtech Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

The information contained in this Exhibit 32.2 is being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. The information in this Exhibit 32.2 shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Exchange Act of 1934, as amended, or the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference to this Exhibit 32.2 in such filing.

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Credit Facilities (Tables)

12 Months Ended

Jan. 27, 2013

Debt Instruments [Abstract]

Schedule of maturities of current and long-term debt

Scheduled maturities of current and long-term debt are as follows:

(in thousands)
Fiscal Year Ending:
2014	$	49,100
2015	22,500
2016	22,500
2017	22,500
2018	216,525
Total debt	$	333,125

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Geographic Information and Concentration of Risk - Schedule of Long-lived Assets (Details) (USD $) In Thousands, unless otherwise specified	Jan. 27, 2013	Jan. 29, 2012
Geographic Information And Concentration Of Risk [Line Items]
Long-lived assets	$ 101,837	$ 69,713
Located within the United States
Geographic Information And Concentration Of Risk [Line Items]
Long-lived assets	53,858	47,612
Located outside the United States
Geographic Information And Concentration Of Risk [Line Items]
Long-lived assets	$ 47,979	$ 22,101

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Significant Accounting Policies - Computation of Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 27, 2013	Oct. 28, 2012	Jul. 29, 2012	Apr. 29, 2012	Jan. 29, 2012	Oct. 30, 2011	Jul. 31, 2011	May 01, 2011	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Earnings Per Share, Basic and Diluted [Abstract]
Net income	$ 13,118	$ 16,590	$ 10,022	$ 2,209	$ 12,388	$ 26,979	$ 27,138	$ 22,582	$ 41,939	$ 89,087	$ 72,572
Weighted average common shares outstanding - basic	66,371	65,996	65,587	65,282	64,856	65,440	65,547	64,552	65,809	65,099	62,339
Dilutive effect of employee equity incentive plans									1,663	2,251	2,184
Weighted average common shares outstanding - diluted	67,984	67,465	67,165	67,233	66,776	67,314	68,186	67,123	67,472	67,350	64,523
Basic earnings per common share (in dollars per share)	$ 0.20	$ 0.25	$ 0.15	$ 0.03	$ 0.19	$ 0.41	$ 0.41	$ 0.35	$ 0.64	$ 1.37	$ 1.16
Diluted earnings per common share (in dollars per share)	$ 0.19	$ 0.25	$ 0.15	$ 0.03	$ 0.19	$ 0.40	$ 0.40	$ 0.34	$ 0.62	$ 1.32	$ 1.12
Anti-dilutive shares not included in the above calculations									783	625	1,700

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Organization and Basis of Presentation (Fiscal Year) (Details)	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011	Jan. 31, 2010
Fiscal Year [Line Items]
Number of weeks in reporting period	52	52	52	53
Minimum
Fiscal Year [Line Items]
Number of weeks in reporting period	52
Maximum
Fiscal Year [Line Items]
Number of weeks in reporting period	53

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Property, Plant and Equipment - Depreciation and Amortization of Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Property, Plant and Equipment [Abstract]
Depreciation and amortization expense	$ 17,915	$ 9,908	$ 6,928

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Acquisitions - Narrative (Details)	12 Months Ended	0 Months Ended		3 Months Ended	12 Months Ended
	Jan. 27, 2013 USD ($)	Mar. 20, 2012 Gennum USD ($)	Mar. 20, 2012 Gennum CAD	Jan. 27, 2013 Gennum USD ($)	Jan. 27, 2013 Gennum USD ($)	Oct. 28, 2012 Gennum USD ($)	May 27, 2012 Gennum USD ($)	Mar. 07, 2012 Cycleo USD ($)
Percentage of outstanding shares acquired		100.00%	100.00%
Price paid per share			13.55
Total acquisition consideration		$ 506,546,000
Long-term debt		347,000,000
Secured term loans, maturity term		5 years	5 years
Original issue discount on debt		3,000,000
Post-acquisition compensation expense					9,600,000
Goodwill decrease, purchase accounting adjustments				900,000
Purchase price allocation, goodwill		261,891,000		261,900,000	261,900,000	262,800,000
Transaction and integration expenses					11,400,000
Severance costs associated with Gennum acquisition	13,400,000
Net sales attributable to acquiree					129,600,000
Net loss attributable to acquiree					(36,500,000)
Settled pre-acquisition contingencies related to legal matters							4,200,000
Cash paid for acquisition								5,000,000
Deferred compensation potential cash payment								$ 16,000,000

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Goodwill and Intangible Assets - Impairment Charges Against In-Process Research and Development (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 30, 2011
Acquired Indefinite-lived Intangible Assets [Line Items]
Net carrying amount of In-Process Research and Development before impairment	$ 2,470
Indefinite-lived intangible assets, impairment losses	(2,470)
High-speed switching technology for power management applications
Acquired Indefinite-lived Intangible Assets [Line Items]
Net carrying amount of In-Process Research and Development before impairment	2,070	[1]
Indefinite-lived intangible assets, impairment losses	(2,070)	[1]
Integrated driver for telecommunications applications
Acquired Indefinite-lived Intangible Assets [Line Items]
Net carrying amount of In-Process Research and Development before impairment	400	[2]
Indefinite-lived intangible assets, impairment losses	$ (400)	[2]

[1] related to the February 2009 Leadis Technology Inc. acquisition.

[2] related to the December 2009 Sierra Monolithics, Inc. acquisition.

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Commitments and Contingencies - Schedule of Aggregate Minimum Annual Lease Payments (Details) (USD $) In Thousands, unless otherwise specified	Jan. 27, 2013
Commitments and Contingencies Disclosure [Abstract]
2014	$ 8,743
2015	5,644
2016	4,625
2017	3,321
2018	3,140
Thereafter	11,383
Total minimum lease commitments	$ 36,856

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Stock Repurchase Program And Shares Withheld From Vested Restricted Shares (Tables)

12 Months Ended

Jan. 27, 2013

Equity [Abstract]

Schedule of summary of stock repurchase activities and shares withheld from vested restricted shares during period

The following table summarizes the stock repurchase activities and shares withheld from vested restricted shares during the periods indicated:

	Fiscal Year Ended
	January 27, 2013			January 29, 2012			January 30, 2011
(in thousands, except number of shares)	Shares	Value		Shares	Value		Shares	Value
Shares repurchased under the 2008 Program	263,443	$	7,500	2,252,099	$	50,000	74,702	$	1,258
Shares withheld from vested restricted shares	9,696	269		27,427	665		89,934	1,561
Total treasury shares acquired	273,139	$	7,769	2,279,526	$	50,665	164,636	$	2,819

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Investments (Tables)

12 Months Ended

Jan. 27, 2013

Investments [Abstract]

Summary of investments

The following table summarizes the Company’s available for sale investments:

	January 27, 2013						January 29, 2012
(in thousands)	Market Value		Adjusted Cost		Gross Unrealized Gain		Market Value		Adjusted Cost		Gross Unrealized Gain
Agency securities	$	7,907	$	7,900	$	7	$	26,132	$	26,110	$	22
Corporate issues	—		—		—		4,511		4,484		27
Bank time deposits	4,973		4,973		—		70,000		70,000		—
Total investments	$	12,880	$	12,873	$	7	$	100,643	$	100,594	$	49

Schedule of investments, classified by maturity period

The following table summarizes the maturities of the Company’s available for sale investments:

	January 27, 2013				January 29, 2012
(in thousands)	Market Value		Adjusted Cost		Market Value		Adjusted Cost
Within 1 year	$	4,973	$	4,973	$	83,121	$	83,085
After 1 year through 5 years	7,907		7,900		17,522		17,509
Total investments	$	12,880	$	12,873	$	100,643	$	100,594

Summary of unrealized gains (losses) on investments

The following table summarizes net unrealized losses arising in the periods presented in addition to the tax associated with these comprehensive income items:

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Unrealized loss, net of tax	$	(32	)	$	(204	)	$	(76	)
Decrease to deferred tax liability	$	(10	)	$	(58	)	$	(41	)

Schedule of interest income generated from investments

The following table summarizes interest income generated from investments and cash and cash equivalents:

	Fiscal Year Ended
(in thousands)	January 27, 2013		January 29, 2012		January 30, 2011
Interest income	$	404	$	1,213	$	1,051

During fiscal year 2013, the Company acquired an investment in a privately traded company for total cash consideration of $2.5 million. The Company accounts for the investment in equity interests under the cost method of accounting since it does not have the ability to exercise significant influence over the investee. The investment in equity interests is included in “Other assets” on the consolidated balance sheet as of January 27, 2013.

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Accrued Liabilities (Summary of Accrued Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Jan. 27, 2013	Jan. 29, 2012
Payables and Accruals [Abstract]
Compensation	$ 23,140	$ 14,330
Equity awards accounted for as a liability	3,241	3,988
Deferred compensation	1,410	901
Accrued sales and marketing expenses	3,202	1,742
Accrued professional fees	3,835	1,949
Accrued interest expense	1,177	0
Income taxes payable	4,113	4,260
Accrued taxes	266	437
Other	8,892	4,782
Total accrued liabilities, current	$ 49,276	$ 32,389

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Selected Quarterly Financial Data (Unaudited) - Quarterly Financial Data (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 27, 2013	Oct. 28, 2012	Jul. 29, 2012	Apr. 29, 2012	Jan. 29, 2012	Oct. 30, 2011	Jul. 31, 2011	May 01, 2011	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Selected Quarterly Financial Data (in Dollars) [Abstract]
Net sales	$ 150,603	$ 160,878	$ 150,704	$ 116,642	$ 104,032	$ 123,944	$ 130,254	$ 122,371	$ 578,827	$ 480,601	$ 454,502
Cost of sales	62,646	64,085	76,179	61,305	44,368	50,537	51,534	48,517	264,215	194,956	186,196
Gross profit	87,957	96,793	74,525	55,337	59,664	73,407	78,720	73,854	314,612	285,645	268,306
Operating costs and expenses:
Selling, general and administrative	37,386	35,646	31,220	44,818	26,333	25,110	22,481	26,705	149,070	100,629	110,404
Product development and engineering	29,959	33,354	32,613	24,083	19,335	20,489	22,228	18,525	120,009	80,577	69,624
Intangible amortization and impairments	8,177	8,212	7,977	5,578	2,075	4,573	2,103	2,102	29,944	10,853	9,520
Total operating costs and expenses	75,522	77,212	71,810	74,479	47,743	50,172	46,812	47,332	299,023	192,059	189,548
Operating (loss) income	12,435	19,581	2,715	(19,142)	11,921	23,235	31,908	26,522	15,589	93,586	78,758
Interest expense	(4,154)	(4,172)	(4,194)	(1,843)	0	0	0	0	(14,363)	0	0
Interest income and other (expense) income, net	(282)	(1,071)	162	214	421	729	(117)	(440)	(977)	593	574
Income before taxes	7,999	14,338	(1,317)	(20,771)	12,342	23,964	31,791	26,082	249	94,179	79,332
(Benefit) provision for taxes	(5,119)	(2,252)	(11,339)	(22,980)	(46)	(3,015)	4,653	3,500	(41,690)	5,092	6,760
Net income	$ 13,118	$ 16,590	$ 10,022	$ 2,209	$ 12,388	$ 26,979	$ 27,138	$ 22,582	$ 41,939	$ 89,087	$ 72,572
Basic (in dollars per share)	$ 0.20	$ 0.25	$ 0.15	$ 0.03	$ 0.19	$ 0.41	$ 0.41	$ 0.35	$ 0.64	$ 1.37	$ 1.16
Diluted (in dollars per share)	$ 0.19	$ 0.25	$ 0.15	$ 0.03	$ 0.19	$ 0.40	$ 0.40	$ 0.34	$ 0.62	$ 1.32	$ 1.12
Weighted average number of shares used in computing earnings per share:
Basic (in shares)	66,371	65,996	65,587	65,282	64,856	65,440	65,547	64,552	65,809	65,099	62,339
Diluted (in shares)	67,984	67,465	67,165	67,233	66,776	67,314	68,186	67,123	67,472	67,350	64,523
Selected Quarterly Financial Data (as a Percent of Revenue) [Abstract]
Net sales	100.00%	100.00%	100.00%	100.00%	100.00%	100.00%	100.00%	100.00%
Cost of sales	42.00%	40.00%	50.00%	53.00%	43.00%	41.00%	40.00%	40.00%
Gross profit	58.00%	60.00%	50.00%	47.00%	57.00%	59.00%	60.00%	60.00%
Operating Costs and Expenses [Abstract]
Selling, general and administrative	25.00%	22.00%	21.00%	38.00%	25.00%	20.00%	17.00%	22.00%
Product development and engineering	20.00%	21.00%	22.00%	21.00%	19.00%	17.00%	17.00%	15.00%
Intangible amortization and impairments	5.00%	5.00%	5.00%	5.00%	2.00%	4.00%	2.00%	2.00%
Total operating costs and expenses	50.00%	48.00%	48.00%	64.00%	46.00%	41.00%	36.00%	39.00%
Operating (loss) income	8.00%	12.00%	2.00%	(17.00%)	11.00%	19.00%	24.00%	22.00%
Interest expense	(3.00%)	(3.00%)	(3.00%)	(2.00%)	0.00%	0.00%	0.00%	0.00%
Interest income and other (expense) income, net	0.00%	(1.00%)	0.00%	0.00%	0.00%	1.00%	0.00%	0.00%
(Loss) income before taxes	5.00%	8.00%	(1.00%)	(19.00%)	11.00%	20.00%	24.00%	22.00%
(Benefit) provision for taxes	(3.00%)	(1.00%)	(8.00%)	(20.00%)	0.00%	(2.00%)	4.00%	3.00%
Net Income	8.00%	9.00%	7.00%	1.00%	11.00%	22.00%	20.00%	19.00%

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Goodwill and Intangible Assets - Estimated Fair Values of Reporting Units, Discounted Cash Flow Inputs (Details) (Goodwill [Member], Income approach)	12 Months Ended
	Jan. 27, 2013
Minimum
Discounted Cash Flow Inputs [Line Items]
Discount rate	10.00%
Tax rate	14.70%
Peer company beta	1.3
Maximum
Discounted Cash Flow Inputs [Line Items]
Discount rate	13.00%
Perpetual growth rate	3.00%
Tax rate	20.00%
Risk-free rate	2.40%
Peer company beta	1.6

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Stock-Based Compensation - Summarized Information Regarding Unvested Stock Option Awards (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011	Jan. 31, 2010
Weighted Average Grant Date Fair Value (per share)
Options granted (in dollars per share)	$ 9.52	$ 8.43	$ 6.56
Unvested Stock Options Award
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance (in shares)	924	1,462	2,849
Options granted (in shares)	258	343	403
Options vested (in shares)	(484)	(650)	(1,575)
Options forfeited (in shares)	(56)	(231)	(215)
Ending balance (in shares)	642	924	1,462	2,849
Weighted Average Exercise Price (per share)
Beginning balance (in dollars per share)	$ 18.47	$ 15.00	$ 13.31
Options granted (in dollars per share)	$ 28.21	$ 24.05	$ 17.61
Options vested (in dollars per share)	$ 16.42	$ 14.30	$ 13.07
Options forfeited (in dollars per share)	$ 21.69	$ 16.59	$ 11.57
Ending balance (in dollars per share)	$ 23.66	$ 18.47	$ 15.00	$ 13.31
Weighted Average Grant Date Fair Value (per share)
Beginning balance (in dollars per share)	$ 6.99	$ 6.23	$ 7.48
Options granted (in dollars per share)	$ 9.52	$ 8.43	$ 6.56
Options vested (in dollars per share)	$ 6.49	$ 6.33	$ 8.26
Options forfeited (in dollars per share)	$ 7.74	$ 6.39	$ 8.56
Ending balance (in dollars per share)	$ 8.31	$ 6.99	$ 6.23	$ 7.48
Weighted Average Remaining Expense Period (years)
Ending Balance	1 year 10 months 24 days	1 year 9 months 18 days	1 year 10 months 24 days	1 year 10 months 24 days
Total Fair Value
Beginning balance	$ 6,452	$ 9,103	$ 21,311
Options granted	2,457	2,893	2,644
Options vested	3,144	4,115	13,006
Options forfeited	432	1,479	1,845
Ending balance	$ 5,333	$ 6,452	$ 9,103	$ 21,311

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Acquisitions - Schedule of Purchase Price Allocation (Details) (Gennum, USD $) In Thousands, unless otherwise specified	Jan. 27, 2013	Oct. 28, 2012	Mar. 20, 2012
Cash			$ 19,664
Accounts receivable, less allowances			14,032
Inventories			62,941
Prepaid expenses			3,832
Income taxes receivable			1,467
Deferred tax assets - current			8,590
Other current assets			7,804
Property, plant and equipment			25,702
Amortizable intangible assets			129,863
In-process research and development			29,100
Goodwill	261,900	262,800	261,891
Deferred tax assets - non-current			31,235
Other non-current assets			8
Deferred tax liabilities			(47,077)
Accounts payable			(18,232)
Accrued liabilities			(24,274)
Total acquisition consideration			506,546
Developed technology
Amortizable intangible assets			95,100
Customer relationships
Amortizable intangible assets			28,000
Other intangible assets
Amortizable intangible assets			$ 6,763

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Geographic Information and Concentration of Risk - Net Sales Activity by Geographic Region (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 27, 2013	Oct. 28, 2012	Jul. 29, 2012	Apr. 29, 2012	Jan. 29, 2012	Oct. 30, 2011	Jul. 31, 2011	May 01, 2011	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Geographic Information And Concentration Of Risk [Line Items]
Net sales	$ 150,603	$ 160,878	$ 150,704	$ 116,642	$ 104,032	$ 123,944	$ 130,254	$ 122,371	$ 578,827	$ 480,601	$ 454,502
North America
Geographic Information And Concentration Of Risk [Line Items]
Net sales									98,401	114,552	112,404
Asia-Pacific
Geographic Information And Concentration Of Risk [Line Items]
Net sales									405,179	298,477	272,079
Europe
Geographic Information And Concentration Of Risk [Line Items]
Net sales									$ 75,247	$ 67,572	$ 70,019
Net sales revenue
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage									100.00%	100.00%	100.00%
Net sales revenue | North America
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage									17.00%	24.00%	25.00%
Net sales revenue | Asia-Pacific
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage									70.00%	62.00%	60.00%
Net sales revenue | Europe
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage									13.00%	14.00%	15.00%

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Goodwill and Intangible Assets - Future Amortization Expense for Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Jan. 27, 2013		Jan. 29, 2012
Fiscal year 2014	$ 30,162
Fiscal year 2015	29,474
Fiscal year 2016	28,899
Fiscal year 2017	28,562
Fiscal year 2018	27,442
Thereafter	29,819
Net Carrying Amount	174,358		56,820
Technology license
Fiscal year 2014	1,507
Fiscal year 2015	1,465
Fiscal year 2016	1,436
Fiscal year 2017	1,186
Fiscal year 2018	776
Thereafter	738
Net Carrying Amount	7,108	[1]	2,750	[1]
Sierra Monolithics
Fiscal year 2014	8,870
Fiscal year 2015	8,870
Fiscal year 2016	8,870
Fiscal year 2017	8,870
Fiscal year 2018	8,160
Thereafter	8,490
Net Carrying Amount	52,130
Gennum
Fiscal year 2014	18,778
Fiscal year 2015	18,132
Fiscal year 2016	17,586
Fiscal year 2017	17,499
Fiscal year 2018	17,499
Thereafter	20,510
Net Carrying Amount	110,004
Cycleo
Fiscal year 2014	1,007
Fiscal year 2015	1,007
Fiscal year 2016	1,007
Fiscal year 2017	1,007
Fiscal year 2018	1,007
Thereafter	81
Net Carrying Amount	$ 5,116

[1] Technology licenses relate to licensing agreements entered into by the Company. Amortization expense related to technology licenses is reported as “Product development and engineering” in the consolidated statements of income.

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Stock-Based Compensation - Summary of Fair Value Assumptions (Details) (USD $)	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated volatility rate, minimum	38.00%	40.00%	39.00%
Estimated volatility rate, maximum	41.00%	41.00%	40.00%
Dividend yield	0.00%	0.00%	0.00%
Risk-free interest rate, minimum	0.66%	0.71%	1.20%
Risk free interest rate, maximum	0.73%	1.80%	2.30%
Weighted average fair value on grant date (in dollars per share)	$ 9.52	$ 8.43	$ 6.56
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected lives, in years	4 years 4 months 24 days	4 years 4 months 24 days	4 years 3 months 18 days
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected lives, in years	4 years 7 months 6 days	4 years 8 months 9 days	5 years 1 month 6 days

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Credit Facilities - Scheduled Maturities of Long-term Debt (Details) (USD $) In Thousands, unless otherwise specified	Jan. 27, 2013
Long-term Debt, Fiscal Year Maturity [Abstract]
2014	$ 49,100
2015	22,500
2016	22,500
2017	22,500
2018	216,525
Total debt	$ 333,125

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Stock-Based Compensation - Summary of the Activity for Stock Option Awards (Details) (Stock options, USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 27, 2013		Jan. 29, 2012		Jan. 30, 2011
Stock options
Number of Shares
Beginning balance (in shares)	3,690		6,622		9,151
Options granted (in shares)	258		343		403
Options exercised (in shares)	(1,254)		(2,781)		(2,329)
Options cancelled/forfeited (in shares)	(115)		(494)		(603)
Ending balance (in shares)	2,579		3,690		6,622
Exercisable at end of the period (in shares)	1,937
Options vested and expected to vest after period (in shares)	2,495
Weighted Average Exercise Price (per share)
Beginning balance (in dollars per share)	$ 16.94		$ 16.84		$ 16.44
Options granted (in dollars per share)	$ 28.21		$ 24.05		$ 17.61
Options exercised (in dollars per share)	$ 15.70		$ 16.64		$ 14.22
Options forfeited (in dollars per share)	$ 25.30		$ 22.30		$ 21.35
Ending balance (in dollars per share)	$ 18.29		$ 16.94		$ 16.84
Exercisable at end of the period (in dollars per share)	$ 16.51
Options vested and expected to vest after January 27, 2013 (in dollars per share)	$ 18.10
Aggregate Intrinsic Value
Beginning balance	$ 44,435	[1]	$ 35,492	[1]	$ 8,998	[1]
Options exercised	14,508	[1]	22,537	[1]	11,495	[1]
Ending balance	29,789	[1]	44,435	[1]	35,492	[1]
Exercisable at end of the period	25,822	[1]
Vested and expected to vest after period end	29,293	[1]
Aggregate Unrecognized Compensation
Beginning balance	4,699		7,067		9,436
Ending balance	$ 3,817		$ 4,699		$ 7,067
Number of Shares Exercisable
Beginning balance	2,767		5,160		6,302
Ending balance	1,937		2,767		5,160
Weighted Average Contractual Term
Exercisable at end of the period	2 years 0 months 25 days
Vested and expected to vest after period end	2 years 7 months 6 days

[1] Represents the difference between the exercise price and the value of the Company’s stock at the time of exercise, for exercised grants. For outstanding awards, represents the difference between the exercise price and the value of the Company’s stock at fiscal year end.

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Goodwill and Intangible Assets - Schedule of Indefinite-lived Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Jan. 27, 2013	Jan. 29, 2012
Indefinite-lived Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	$ 34,870	$ 12,370
Accumulated Impairment Loss	(3,170)	(2,470)
Net Carrying Amount	31,700	9,900
In-process research and development
Indefinite-lived Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	34,870	12,370
Accumulated Impairment Loss	(3,170)	(2,470)
Net Carrying Amount	$ 31,700	$ 9,900

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Goodwill and Intangible Assets - Narrative (Details) (USD $)	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Goodwill and Intangible Assets [Line Items]
Goodwill increase due to acquisitions	$ 263,900,000
Increase in finite-lived intangible assets	147,600,000
Increase (decrease) in indefinite-lived intangible assets	22,500,000
Amortization expense related to finite-lived intangible assets	29,200,000	8,400,000	9,500,000
Impairment of indefinite-lived intangible asset	700,000
Technology license
Goodwill and Intangible Assets [Line Items]
Increase in finite-lived intangible assets	5,000,000
In-process research and development
Goodwill and Intangible Assets [Line Items]
Increase in finite-lived intangible assets	6,600,000
Increase (decrease) in indefinite-lived intangible assets	(6,600,000)
Gennum
Goodwill and Intangible Assets [Line Items]
Increase in finite-lived intangible assets	129,900,000
Increase (decrease) in indefinite-lived intangible assets	29,100,000
Gennum | Developed technology
Goodwill and Intangible Assets [Line Items]
Finite-lived intangible assets from acquisition	95,100,000
Cycleo
Goodwill and Intangible Assets [Line Items]
Increase in finite-lived intangible assets	6,100,000
Cycleo | Developed technology
Goodwill and Intangible Assets [Line Items]
Finite-lived intangible assets from acquisition	6,100,000
Gennum | Gennum
Goodwill and Intangible Assets [Line Items]
Goodwill acquired during period	261,891,000
Advanced Communications Reporting Unit [Member]
Goodwill and Intangible Assets [Line Items]
Allocation of goodwill percentage	90.00%
Wireless And Sensing Reporting Unit
Goodwill and Intangible Assets [Line Items]
Allocation of goodwill percentage	10.00%
Wireless And Sensing Reporting Unit | Cycleo
Goodwill and Intangible Assets [Line Items]
Goodwill acquired during period	$ 2,042,000
In-process research and development | Income approach | Minimum
Goodwill and Intangible Assets [Line Items]
Discount rate used to value IPR&D	12.00%
Market participant tax rate used to value IPR&D	12.30%
In-process research and development | Income approach | Maximum
Goodwill and Intangible Assets [Line Items]
Discount rate used to value IPR&D	18.00%
Market participant tax rate used to value IPR&D	17.00%

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Reorganization Costs

12 Months Ended

Jan. 27, 2013

Reorganizations [Abstract]

Reorganization Costs

Reorganization Costs

During fiscal year 2013, reorganization costs mainly represent the severance costs associated with the integration of the acquired Gennum business with the Company’s pre-existing business and the consolidation of certain operations of the combined Company.

During the third quarter of fiscal year 2012, the Company initiated a reorganization plan which resulted in a consolidation of research and development activities and a reduction of its workforce.

There was no reorganization cost in fiscal year 2011.

The following table summarizes the reorganization charges incurred and liability balance included in “Accrued liabilities” on the consolidated balance sheet as of January 30, 2011, January 29, 2012 and January 27, 2013. The reorganization charges below were included in “Selling, general and administrative” on the consolidated statements of income for the respective periods.

(in thousands)	Severance and related costs
Balance at January 30, 2011	$	—
Reorganization charges	1,981
Cash payments	(1,965		)
Balance at January 29, 2012	16
Reorganization charges	13,387
Cash payments	(12,073		)
Balance at January 27, 2013	$	1,330

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Significant Accounting Policies - Narrative (Details) (USD $)	3 Months Ended	12 Months Ended
	Oct. 28, 2012	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Other Intangible Assets and Long-lived Assets [Abstract]
Percent of realizable undiscounted cash flows used to determine useful life of acquired finite-lived intangible assets, minimum		90.00%
Licensing Revenue [Abstract]
License revenue from a single licensing arrangement	$ 7,500,000
Sales and Marketing [Abstract]
Advertising costs		119,000	285,000	232,000
Product Development and Engineering [Abstract]
Recoveries from nonrecurring engineering services		$ 12,500,000	$ 5,700,000	$ 11,700,000

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Income Taxes (Tables)

12 Months Ended

Jan. 27, 2013

Income Tax Disclosure [Abstract]

Schedule of components of income tax expense

The (benefit) provision for taxes consists of the following:

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Current tax provision
Federal	$	7,100		$	2,336		$	3,178
State	784			569			444
Foreign	5,745			4,615			2,822
Subtotal	13,629			7,520			6,444
Deferred tax (benefit) provision
Federal	(15,812		)	(4,417		)	(1,631		)
State	(148		)	1,232			(5		)
Foreign	(39,359		)	757			1,952
Subtotal	(55,319		)	(2,428		)	316
(Benefit) provision for taxes	$	(41,690	)	$	5,092		$	6,760

Schedule of income tax reconciliation

The (benefit) provision for taxes reconciles to the amount computed by applying the statutory federal rate to income before taxes as follows:

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Federal income tax at statutory rate	$	86		$	32,963		$	27,766
State income taxes, net of federal benefit	(2,472		)	(263		)	581
Foreign taxes at rates less than federal rates	(9,655		)	(16,269		)	(16,367		)
Tax credits generated	(5,328		)	(2,222		)	(1,234		)
Changes in valuation allowance	2,703			1,814			(879		)
Changes in uncertain tax positions	132			(3,235		)	2,755
Deemed dividends	1,101			1,250			1,056
Equity compensation	793			(1,312		)	1,639
Permanent differences	1,571			1,592			1,652
Sales exclusion - foreign jurisdiction	(10,689		)	(11,017		)	(9,429		)
Dividend and U.S. tax on foreign earnings	(23,443		)	—			—
Revaluation of deferred taxes assets and liabilities	3,510			—			—
Other	1			1,791			(780		)
(Benefit) provision for taxes	$	(41,690	)	$	5,092		$	6,760

Schedule of deferred tax assets and liabilities

The deferred tax assets and deferred tax liabilities are classified in the consolidated balance sheets as follows:

(in thousands)	January 27, 2013			January 29, 2012
Deferred tax assets
Current	$	7,473		$	5,339
Non-current	33,563			—
Subtotal	41,036			5,339
Deferred tax liabilities
Current	(4,221		)	(4,041		)
Non-current	(2,042		)	(1,000		)
Subtotal	(6,263		)	(5,041		)
Net deferred tax assets	$	34,773		$	298

Schedule of components of deferred tax assets and deferred tax liabilities

The components of the net deferred income tax assets at January 27, 2013 and January 29, 2012 are as follows:

(in thousands)	January 27, 2013			January 29, 2012
Current deferred tax asset:
Deferred revenue	$	1,889		$	2,346
Inventory reserve	567			347
Payroll and related accruals	2,444			1,926
Bad debt reserve	323			359
Accrued service fees	626			405
Other deferred assets	2,593			508
Valuation allowance	(969		)	(552		)
Total current deferred tax asset	7,473			5,339
Non-current deferred tax asset:
Research and development charges	2,900			3,708
Research credit carryforward	49,257			11,967
Acquired NOL carryforward	28,595			16,489
Payroll and related accruals	5,389			4,497
Stock-based compensation	8,456			10,248
Other deferred assets	3,395			772
Valuation allowance	(7,351		)	(5,065		)
Total non-current deferred tax asset	90,641			42,616
Current deferred tax liability:
Inventory reserve - foreign	(1,618		)	(2,115		)
Bad debt reserve - foreign	(773		)	(671		)
Depreciation - foreign	(1,744		)	(1,074		)
Other current deferred tax liability	(86		)	(181		)
Total current deferred tax liability	(4,221		)	(4,041		)
Non-current deferred tax liability:
Domestic tax on foreign earnings	—			(23,443		)
Purchase accounting deferred tax liability	(49,181		)	(14,159		)
Depreciation and amortization	(8,504		)	(5,760		)
Other non-current deferred tax liability	(1,435		)	(254		)
Total non-current deferred tax liability	(59,120		)	(43,616		)
Net deferred tax asset	$	34,773		$	298

Schedule of valuation of allowances

The following table summarizes the changes in these allowances during fiscal years 2013, 2012 and 2011:

	Fiscal Year Ended
(in thousands)	January 27, 2013		January 29, 2012		January 30, 2011
Beginning balance	$	5,617	$	5,053	$	6,502
Additions	2,703		564		2,767
Releases	—		—		(4,216		)
Ending balance	$	8,320	$	5,617	$	5,053

Schedule of gross unrecognized tax benefits

A reconciliation of the beginning and ending amount of gross unrecognized tax benefits (before federal impact of state items) is as follows:

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Beginning balance	$	13,759		$	17,011		$	13,795
Additions based on tax positions related to the current year	695			835			449
Additions for tax positions of prior years	—			—			3,592
Reductions for tax positions of prior years	(647		)	(4,087		)	—
Reductions for settlements with tax authorities	(663		)	—			(825		)
Ending balance	$	13,144		$	13,759		$	17,011

Schedule of liability for uncertain tax positions

The liability for uncertain tax positions is reflected on the consolidated balance sheets as follows:

	Fiscal Year Ended
(in thousands)	January 27, 2013		January 29, 2012
Accrued liabilities	$	188	$	437
Other long-term liabilities	10,887		11,159
Total accrued taxes	$	11,075	$	11,596

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Goodwill and Intangible Assets - Schedule of Fair Value of Core Technologies (Details) (Developed technology, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 27, 2013
Gennum
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, fair value	$ 95,100
Gennum | Underlying intellectual property - Clock and data recovery
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, fair value	31,000
Estimated useful life	8 years
Gennum | Video broadcast and surveillance
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, fair value	39,000
Gennum | Optical communication
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, fair value	21,000
Estimated useful life	6 years
Gennum | Other
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, fair value	$ 4,100
Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life	2 years
Minimum | Gennum | Video broadcast and surveillance
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life	7 years
Minimum | Gennum | Other
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life	6 years
Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life	10 years
Maximum | Gennum | Video broadcast and surveillance
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life	8 years
Maximum | Gennum | Other
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful life	7 years

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Income Taxes - Income Tax Reconciliation (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Federal income tax at statutory rate	$ 86	$ 32,963	$ 27,766
State income taxes, net of federal benefit	(2,472)	(263)	581
Foreign taxes at rates less than federal rates	(9,655)	(16,269)	(16,367)
Tax credits generated	(5,328)	(2,222)	(1,234)
Changes in valuation allowance	2,703	1,814	(879)
Changes in uncertain tax positions	132	(3,235)	2,755
Deemed dividends	1,101	1,250	1,056
Equity compensation	793	(1,312)	1,639
Income Tax Reconciliation, Nondeductible Expense	1,571	1,592	1,652
Sales exclusion - foreign jurisdiction	(10,689)	(11,017)	(9,429)
Dividend and U.S. tax on foreign earnings	(23,443)	0	0
Revaluation of deferred taxes assets and liabilities	3,510	0	0
Other	1	1,791	(780)
(Benefit) provision for taxes	$ (41,690)	$ 5,092	$ 6,760

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Goodwill and Intangible Assets (Tables)

12 Months Ended

Jan. 27, 2013

Schedule of Goodwill and Intangible Assets [Line Items]

Goodwill balances

Goodwill balances as of January 27, 2013 and January 29, 2012 are presented below:

(in thousands)	Carrying Amount
Balance as of January 29, 2012	$	129,651
Acquisition of Gennum Corporation	261,891
Acquisition of Cycleo SAS	2,042
Balance as of January 27, 2013	$	393,584

Schedule of discounted cash flow inputs

Specifically, the income approach valuations included the following assumptions:

Discount rate	10.0% - 13.0%
Perpetual growth rate	3.0%
Tax rate	14.7% - 20.0%
Risk-free rate	2.4%
Peer company beta	1.3 - 1.6

Schedule of finite-lived intangible assets

The following table sets forth the Company’s finite-lived intangible assets resulting from business acquisitions and technology licenses purchased, which continue to be amortized:

		January 27, 2013							January 29, 2012
(in thousands)	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Core technologies	2-10 years	$	173,724	$	(40,867	)	$	132,857	$	65,900	$	(21,031	)	$	44,869
Customer relationships	7-10 years	40,130		(7,736		)	32,394		12,130		(2,929		)	9,201
Technology licenses (1)	5-10 years	8,164		(1,056		)	7,108		3,000		(250		)	2,750
Other intangibles assets	1-5 years	6,600		(4,601		)	1,999		—		—			—
Total finite-lived intangible assets		$	228,618	$	(54,260	)	$	174,358	$	81,030	$	(24,210	)	$	56,820

(1) Technology licenses relate to licensing agreements entered into by the Company. Amortization expense related to technology licenses is reported as “Product development and engineering” in the consolidated statements of income.

Future amortization expense for intangible assets

The estimated annual amount of future amortization expense for finite-lived intangible assets will be as follows:

(in thousands)
To be recognized in:	Technology license		Sierra Monolithics		Gennum		Cycleo		Total
Fiscal year 2014	$	1,507	$	8,870	$	18,778	$	1,007	$	30,162
Fiscal year 2015	1,465		8,870		18,132		1,007		29,474
Fiscal year 2016	1,436		8,870		17,586		1,007		28,899
Fiscal year 2017	1,186		8,870		17,499		1,007		28,562
Fiscal year 2018	776		8,160		17,499		1,007		27,442
Thereafter	738		8,490		20,510		81		29,819
Total expected amortization expense	$	7,108	$	52,130	$	110,004	$	5,116	$	174,358

Schedule of indefinite-lived intangible assets

The following table sets forth the Company’s indefinite-lived intangible assets resulting from business acquisitions:

	January 27, 2013							January 29, 2012
(in thousands)	Gross Carrying Amount		Accumulated Impairment Loss			Net Carrying Amount		Gross Carrying Amount		Accumulated Impairment Loss			Net Carrying Amount
In-process research and development	$	34,870	$	(3,170	)	$	31,700	$	12,370	$	(2,470	)	$	9,900
Total indefinite-lived intangible assets	$	34,870	$	(3,170	)	$	31,700	$	12,370	$	(2,470	)	$	9,900

Schedule of in-process research and development impairment

(in thousands)	Net Carrying
In-process research and development impairment	Amount		Impairment
High-speed switching technology for power management applications (1)	$	2,070	$	(2,070	)
Integrated driver for telecommunications applications (2)	400		(400		)
Total	$	2,470	$	(2,470	)

(1) related to the February 2009 Leadis Technology Inc. acquisition.

(2) related to the December 2009 Sierra Monolithics, Inc. acquisition.

Gennum

Schedule of Goodwill and Intangible Assets [Line Items]

Schedule of fair value of core technologies

The nature of Gennum’s core technology was categorized as follows:

	January 27, 2013
(in thousands)	Fair Value		Estimated Useful Life
Underlying intellectual property - Clock and data recovery	$	31,000	8 years
Video broadcast and surveillance	39,000		7-8 years
Optical communication	21,000		6 years
Other	4,100		6-7 years
Total	$	95,100

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Significant Accounting Policies - Deferred Revenue (Details) (USD $) In Thousands, unless otherwise specified	Jan. 27, 2013	Jan. 29, 2012
Deferred Revenue [Abstract]
Deferred revenues	$ 4,467	$ 4,964
Deferred cost of revenues	1,099	1,243
Deferred revenue, net	3,368	3,721
Deferred product design and engineering recoveries	377	132
Total deferred revenue	$ 3,745	$ 3,853

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Inventories - Summary of Inventories (Details) (USD $) In Thousands, unless otherwise specified	Jan. 27, 2013	Jan. 29, 2012
Inventory Disclosure [Abstract]
Raw materials	$ 1,970	$ 4,871
Work in progress	52,669	30,884
Finished goods	20,239	11,240
Inventories	$ 74,878	$ 46,995

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Geographic Information and Concentration of Risk - Schedule of Income (Loss) from Continuing Operations before Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 27, 2013	Oct. 28, 2012	Jul. 29, 2012	Apr. 29, 2012	Jan. 29, 2012	Oct. 30, 2011	Jul. 31, 2011	May 01, 2011	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Risks and Uncertainties [Abstract]
Domestic									$ (19,867)	$ (3,070)	$ (12,540)
Foreign									20,116	97,249	91,872
Income before taxes	$ 7,999	$ 14,338	$ (1,317)	$ (20,771)	$ 12,342	$ 23,964	$ 31,791	$ 26,082	$ 249	$ 94,179	$ 79,332

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Investments - Schedule of Investments, Classified by Maturity Period (Details) (USD $) In Thousands, unless otherwise specified	Jan. 27, 2013	Jan. 29, 2012
Investment [Line Items]
Market Value	$ 12,880	$ 100,643
Adjusted Cost	12,873	100,594
Within 1 year
Investment [Line Items]
Market Value	4,973	83,121
Adjusted Cost	4,973	83,085
After 1 year through 5 years
Investment [Line Items]
Market Value	7,907	17,522
Adjusted Cost	$ 7,900	$ 17,509

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Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Jan. 27, 2013

Statement of Financial Position [Abstract]

Schedule of Quarterly Financial Information

The following tables set forth the Company’s unaudited consolidated statements of income data for each of the eight quarterly periods ended January 27, 2013, as well as that data expressed as a percentage of the Company’s net sales for the quarters presented. The sum of quarterly per share amounts may differ from year to date amounts due to rounding.

Selected Quarterly Financial Data (Unaudited)

	Fiscal Year 2013												Fiscal Year 2012
	Quarters Ended												Quarters Ended
(in thousands, except per share amounts)	April 29, 2012			July 29, 2012			October 28, 2012			January 27, 2013			May 1, 2011			July 31, 2011			October 30, 2011			January 29, 2012
Net sales	$	116,642		$	150,704		$	160,878		$	150,603		$	122,371		$	130,254		$	123,944		$	104,032
Cost of sales	61,305			76,179			64,085			62,646			48,517			51,534			50,537			44,368
Gross profit	55,337			74,525			96,793			87,957			73,854			78,720			73,407			59,664
Operating costs and expenses:
Selling, general and administrative	44,818			31,220			35,646			37,386			26,705			22,481			25,110			26,333
Product development and engineering	24,083			32,613			33,354			29,959			18,525			22,228			20,489			19,335
Intangible amortization and impairments	5,578			7,977			8,212			8,177			2,102			2,103			4,573			2,075
Total operating costs and expenses	74,479			71,810			77,212			75,522			47,332			46,812			50,172			47,743
Operating (loss) income	(19,142		)	2,715			19,581			12,435			26,522			31,908			23,235			11,921
Interest expense	(1,843		)	(4,194		)	(4,172		)	(4,154		)	—			—			—			—
Interest income and other (expense) income, net	214			162			(1,071		)	(282		)	(440		)	(117		)	729			421
(Loss) income before taxes	(20,771		)	(1,317		)	14,338			7,999			26,082			31,791			23,964			12,342
(Benefit) provision for taxes	(22,980		)	(11,339		)	(2,252		)	(5,119		)	3,500			4,653			(3,015		)	(46		)
Net Income	$	2,209		$	10,022		$	16,590		$	13,118		$	22,582		$	27,138		$	26,979		$	12,388
Earnings per share:
Basic	$	0.03		$	0.15		$	0.25		$	0.20		$	0.35		$	0.41		$	0.41		$	0.19
Diluted	$	0.03		$	0.15		$	0.25		$	0.19		$	0.34		$	0.40		$	0.40		$	0.19
Weighted average number of shares used in computing earnings per share:
Basic	65,282			65,587			65,996			66,371			64,552			65,547			65,440			64,856
Diluted	67,233			67,165			67,465			67,984			67,123			68,186			67,314			66,776

	Fiscal Year 2013								Fiscal Year 2012
	Quarters Ended								Quarters Ended
	April 29, 2012		July 29, 2012		October 28, 2012		January 27, 2013		May 1, 2011		July 31, 2011		October 30, 2011		January 29, 2012
Net sales	100	%	100	%	100	%	100	%	100	%	100	%	100	%	100	%
Cost of sales	53	%	50	%	40	%	42	%	40	%	40	%	41	%	43	%
Gross profit	47	%	50	%	60	%	58	%	60	%	60	%	59	%	57	%
Operating costs and expenses:
Selling, general and administrative	38	%	21	%	22	%	25	%	22	%	17	%	20	%	25	%
Product development and engineering	21	%	22	%	21	%	20	%	15	%	17	%	17	%	19	%
Intangible amortization and impairments	5	%	5	%	5	%	5	%	2	%	2	%	4	%	2	%
Total operating costs and expenses	64	%	48	%	48	%	50	%	39	%	36	%	41	%	46	%
Operating (loss) income	(17	)%	2	%	12	%	8	%	22	%	24	%	19	%	11	%
Interest expense	(2	)%	(3	)%	(3	)%	(3	)%	—	%	—	%	—	%	—	%
Interest income and other (expense) income, net	—	%	—	%	(1	)%	—	%	—	%	—	%	1	%	—	%
(Loss) income before taxes	(19	)%	(1	)%	8	%	5	%	22	%	24	%	20	%	11	%
(Benefit) provision for taxes	(20	)%	(8	)%	(1	)%	(3	)%	3	%	4	%	(2	)%	—	%
Net Income	1	%	7	%	9	%	8	%	19	%	20	%	22	%	11	%

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Organization and Basis of Presentation

12 Months Ended

Jan. 27, 2013

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Basis of Presentation

Organization and Basis of Presentation

Semtech Corporation (together with its subsidiaries, the “Company” or “Semtech”) is a global supplier of analog and mixed-signal semiconductor products. The end-customers for the Company’s products are primarily original equipment manufacturers (“OEM’s”) that produce and sell electronics.

The Company designs, develops and markets a wide range of products for commercial applications, the majority of which are sold into the enterprise computing, communications, high-end consumer and industrial end-markets.

Enterprise Computing: datacenters, passive optical networks, optical receiver and transceiver, desktops, notebooks, servers, graphic boards, monitors, printers and other computer peripherals.

Communications: base stations, backplane, optical networks, carrier networks, switches and routers, servers, cable modems, signal conditioners, wireless LAN and other communication infrastructure equipment.

High-End Consumer: handheld products, set-top boxes, digital televisions, tablet computers, digital video recorders, thunderbolt and fiberless high-speed interfaces and other consumer equipment.

Industrial: broadcast studio equipment, automated meter reading, military and aerospace, medical, security systems, automotive, industrial and home automation, video security and surveillance and other industrial equipment.

Fiscal Year

The Company reports results on the basis of 52 and 53 week periods and ends its fiscal year on the last Sunday in January. The fiscal years ended January 27, 2013, January 29, 2012 and January 30, 2011 each consisted of 52 weeks.

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of Semtech Corporation and its wholly owned subsidiaries. All inter-company transactions and accounts have been eliminated.

In March 2012, the Company completed the acquisitions of Gennum Corporation (“Gennum”) and Cycleo SAS (“Cycleo”). The consolidated financial statements include the results of operations of Gennum and Cycleo commencing as of the acquisition dates. See Note 3 for further discussion.

Segment Information

The Company operates and accounts for its results in one reportable segment. The Company identified five operating segments which aggregate into one reportable segment.The Company designs, develops, manufactures and markets high performance analog and mixed signal integrated circuits. The Chief Executive Officer has been identified as the Chief Operating Decision Maker as defined by guidance regarding segment disclosures. The Company has evaluated its reportable segments subsequent to its acquisition of Gennum and concluded that it continues to operate and account for its results in one reportable segment.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Reclassification

Certain prior period immaterial amounts have been reclassified to conform with current period presentation.

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Stock Repurchase Program And Shares Withheld From Vested Restricted Shares - Narrative (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended
	Mar. 04, 2008 2008 share repurchase program	Nov. 30, 2011 2008 repurchase program expansion	Aug. 24, 2011 2008 repurchase program expansion
Equity, Class of Treasury Stock [Line Items]
Share repurchase program, authorized amount	$ 50	$ 50	$ 36

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Investments - Summary of Unrealized Gains (Losses) on Investments (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Investments [Abstract]
Unrealized loss, net of tax	$ (32)	$ (204)	$ (76)
Decrease to deferred tax liability	$ (10)	$ (58)	$ (41)

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Commitments and Contingencies (Tables)

12 Months Ended

Jan. 27, 2013

Commitments and Contingencies Disclosure [Abstract]

Schedule aggregate minimum operating lease payments

The aggregate minimum annual lease payments under leases in effect on January 27, 2013 are as follows:

Minimum Annual Lease Payments

(in thousands)
Fiscal Year Ending:
2014	$	8,743
2015	5,644
2016	4,625
2017	3,321
2018	3,140
Thereafter	11,383
Total minimum lease commitments	$	36,856

Schedule of compensation expense and forfeitures under deferred compensation plan

The following table shows the compensation expense and forfeitures under this plan for fiscal years 2013, 2012 and 2011:

	Fiscal Year Ended
(in thousands)	January 27, 2013		January 29, 2012			January 30, 2011
Forfeitures	$	—	$	(194	)	$	(66	)
Compensation expense	1,839		885			2,166
Compensation expense, net of forfeitures	$	1,839	$	691		$	2,100

Schedule of Liability for deferred compensation

The Company’s liability for deferred compensation plan for certain officers and key executives is presented below:

(in thousands)	January 27, 2013		January 29, 2012
Accrued liabilities	$	530	$	901
Other long-term liabilities	13,396		10,222
Total deferred compensation liabilities under this plan	$	13,926	$	11,123

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Schedule II - Valuation And Qualifying Accounts

12 Months Ended

Jan. 27, 2013

Valuation and Qualifying Accounts [Abstract]

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

THREE YEARS ENDED JANUARY 27, 2013

	Balance at Beginning of Year		Charged (Reversal) to Costs and Expenses		Deductions			Balance at End of Year
Year ended January 30, 2011
Allowance for doubtful accounts	$	1,302,000	$	53,924	$	(247,703	)	$	1,108,221
Year ended January 29, 2012
Allowance for doubtful accounts	$	1,108,221	$	332,154	$	(887,500	)	$	552,875
Year ended January 27, 2013
Allowance for doubtful accounts	$	552,875	$	40,820	$	—		$	593,695

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Selected Quarterly Financial Data (Unaudited)

12 Months Ended

Jan. 27, 2013

Statement of Financial Position [Abstract]

Selected Quarterly Financial Data (Unaudited)

Selected Quarterly Financial Data (Unaudited)

The following tables set forth the Company’s unaudited consolidated statements of income data for each of the eight quarterly periods ended January 27, 2013, as well as that data expressed as a percentage of the Company’s net sales for the quarters presented. The sum of quarterly per share amounts may differ from year to date amounts due to rounding.

Selected Quarterly Financial Data (Unaudited)

	Fiscal Year 2013												Fiscal Year 2012
	Quarters Ended												Quarters Ended
(in thousands, except per share amounts)	April 29, 2012			July 29, 2012			October 28, 2012			January 27, 2013			May 1, 2011			July 31, 2011			October 30, 2011			January 29, 2012
Net sales	$	116,642		$	150,704		$	160,878		$	150,603		$	122,371		$	130,254		$	123,944		$	104,032
Cost of sales	61,305			76,179			64,085			62,646			48,517			51,534			50,537			44,368
Gross profit	55,337			74,525			96,793			87,957			73,854			78,720			73,407			59,664
Operating costs and expenses:
Selling, general and administrative	44,818			31,220			35,646			37,386			26,705			22,481			25,110			26,333
Product development and engineering	24,083			32,613			33,354			29,959			18,525			22,228			20,489			19,335
Intangible amortization and impairments	5,578			7,977			8,212			8,177			2,102			2,103			4,573			2,075
Total operating costs and expenses	74,479			71,810			77,212			75,522			47,332			46,812			50,172			47,743
Operating (loss) income	(19,142		)	2,715			19,581			12,435			26,522			31,908			23,235			11,921
Interest expense	(1,843		)	(4,194		)	(4,172		)	(4,154		)	—			—			—			—
Interest income and other (expense) income, net	214			162			(1,071		)	(282		)	(440		)	(117		)	729			421
(Loss) income before taxes	(20,771		)	(1,317		)	14,338			7,999			26,082			31,791			23,964			12,342
(Benefit) provision for taxes	(22,980		)	(11,339		)	(2,252		)	(5,119		)	3,500			4,653			(3,015		)	(46		)
Net Income	$	2,209		$	10,022		$	16,590		$	13,118		$	22,582		$	27,138		$	26,979		$	12,388
Earnings per share:
Basic	$	0.03		$	0.15		$	0.25		$	0.20		$	0.35		$	0.41		$	0.41		$	0.19
Diluted	$	0.03		$	0.15		$	0.25		$	0.19		$	0.34		$	0.40		$	0.40		$	0.19
Weighted average number of shares used in computing earnings per share:
Basic	65,282			65,587			65,996			66,371			64,552			65,547			65,440			64,856
Diluted	67,233			67,165			67,465			67,984			67,123			68,186			67,314			66,776

	Fiscal Year 2013								Fiscal Year 2012
	Quarters Ended								Quarters Ended
	April 29, 2012		July 29, 2012		October 28, 2012		January 27, 2013		May 1, 2011		July 31, 2011		October 30, 2011		January 29, 2012
Net sales	100	%	100	%	100	%	100	%	100	%	100	%	100	%	100	%
Cost of sales	53	%	50	%	40	%	42	%	40	%	40	%	41	%	43	%
Gross profit	47	%	50	%	60	%	58	%	60	%	60	%	59	%	57	%
Operating costs and expenses:
Selling, general and administrative	38	%	21	%	22	%	25	%	22	%	17	%	20	%	25	%
Product development and engineering	21	%	22	%	21	%	20	%	15	%	17	%	17	%	19	%
Intangible amortization and impairments	5	%	5	%	5	%	5	%	2	%	2	%	4	%	2	%
Total operating costs and expenses	64	%	48	%	48	%	50	%	39	%	36	%	41	%	46	%
Operating (loss) income	(17	)%	2	%	12	%	8	%	22	%	24	%	19	%	11	%
Interest expense	(2	)%	(3	)%	(3	)%	(3	)%	—	%	—	%	—	%	—	%
Interest income and other (expense) income, net	—	%	—	%	(1	)%	—	%	—	%	—	%	1	%	—	%
(Loss) income before taxes	(19	)%	(1	)%	8	%	5	%	22	%	24	%	20	%	11	%
(Benefit) provision for taxes	(20	)%	(8	)%	(1	)%	(3	)%	3	%	4	%	(2	)%	—	%
Net Income	1	%	7	%	9	%	8	%	19	%	20	%	22	%	11	%

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Income Taxes - Change in Valuation Allowance (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Change in Deferred Tax Asset Valuation Allowance [Abstract]
Beginning balance	$ 5,617	$ 5,053	$ 6,502
Additions	2,703	564	2,767
Releases	0	0	(4,216)
Ending balance	$ 8,320	$ 5,617	$ 5,053

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Acquisitions - Narrative (Pro forma Information) (Details) (USD $)		12 Months Ended
	Mar. 20, 2012	Jan. 27, 2013 Gennum contingency	Jan. 29, 2012 Gennum
Business Acquisition [Line Items]
Pro forma adjustment, increase (decrease) in cost of goods sold		$ (39,400,000)	$ 41,800,000
Pro forma adjustment, decrease in operating expense			(12,900,000)
Pro forma adjustment, number of pre-acquisition contingencies settled		2
Pro forma adjustment, increase in operating expense due to settlement		4,200,000
Pro forma adjustment, increase (decrease) in amortization expense		(1,600,000)	22,800,000
Pro forma adjustment, increase (decrease) in income tax benefit		(23,400,000)	23,400,000
Pro forma adjustment, increase in interest expense		1,700,000	16,600,000
Debt instrument, face amount	$ 350,000,000

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Geographic Information and Concentration of Risk (Tables)

12 Months Ended

Jan. 27, 2013

Risks and Uncertainties [Abstract]

Schedule of net sales by product line

The table below provides net sales activity by product line on a comparative basis for all periods. As a result of the acquisition of Gennum and Cycleo (see Note 3) in March 2012, the Company formed a separate Gennum product line while Cycleo is part of the Wireless and Sensing product line.

	Fiscal Year Ended
(in thousands, except percentages)	January 27, 2013				January 29, 2012				January 30, 2011
Advanced Communications	$	133,533	23	%	$	139,695	29	%	$	112,019	25	%
Wireless and Sensing	50,444		9	%	57,124		12	%	59,107		13	%
Power Management and High Reliability	66,427		12	%	74,056		15	%	87,693		19	%
Protection	198,866		34	%	209,726		44	%	195,683		43	%
Gennum	129,557		22	%	—		—	%	—		—	%
Total net sales	$	578,827	100	%	$	480,601	100	%	$	454,502	100	%

Schedule of net sales by geographic region

Net sales activity by geographic region is as follows:

	Fiscal Year Ended
(in thousands, except percentages)	January 27, 2013				January 29, 2012				January 30, 2011
North America	$	98,401	17	%	$	114,552	24	%	$	112,404	25	%
Asia-Pacific	405,179		70	%	298,477		62	%	272,079		60	%
Europe	75,247		13	%	67,572		14	%	70,019		15	%
Total net sales	$	578,827	100	%	$	480,601	100	%	$	454,502	100	%

Schedule of sales activity to countries representing greater than 10% of total sales

The table below summarizes sales activity to countries that represented greater than 10% of total net sales for at least one of the periods indicated:

	Fiscal Year Ended
(percentage of total sales)	January 27, 2013		January 29, 2012		January 30, 2011
United States	17	%	20	%	23	%
China (including Hong Kong)	35	%	38	%	34	%
Japan	10	%	8	%	7	%
South Korea	7	%	8	%	10	%
Total net sales	69	%	74	%	74	%

Schedule of income (loss) from continuing operations before income taxes

The Company’s regional income (loss) from continuing operations before income taxes is as follows:

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Domestic	$	(19,867	)	$	(3,070	)	$	(12,540	)
Foreign	20,116			97,249			91,872
Total	$	249		$	94,179		$	79,332

Schedule of long-lived assets

Long-lived assets which consist of property, plant and equipment, net of accumulated depreciation are summarized as follows:

(in thousands)	January 27, 2013		January 29, 2012
Located within the United States	$	53,858	$	47,612
Located outside the United States	47,979		22,101
	$	101,837	$	69,713

Schedule of concentration risk of net sales

Each of the following significant customers accounted for at least 10% of net sales for at least one of the periods indicated:

	Fiscal Year Ended
(percentage of net sales)	January 27, 2013		January 29, 2012		January 30, 2011
Samsung Electronics (and affiliates)	12	%	13	%	12	%
Huawei Technologies (and affiliates)	10	%	7	%	8	%
Frontek Technology Corp	6	%	10	%	11	%

Schedule of concentration risk of accounts receivable

The following table shows the list of customers that have an outstanding receivable balance that represents at least 10% of total net receivables for at least one of the periods indicated:

	Balance as of
(percentage of net accounts receivable)	January 27, 2013		January 29, 2012
Huawei Technologies (and affiliates)	14	%	11	%
Samsung Electronics (and affiliates)	12	%	14	%
Frontek Technology Corp	4	%	10	%
Dragon Technology	3	%	11	%

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Significant Accounting Policies (Policies)

12 Months Ended

Jan. 27, 2013

Accounting Policies [Abstract]

Fiscal Year

Fiscal Year

The Company reports results on the basis of 52 and 53 week periods and ends its fiscal year on the last Sunday in January.

Principles of Consolidation

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of Semtech Corporation and its wholly owned subsidiaries. All inter-company transactions and accounts have been eliminated.

Segment Information

Segment Information

The Company operates and accounts for its results in one reportable segment. The Company identified five operating segments which aggregate into one reportable segment.The Company designs, develops, manufactures and markets high performance analog and mixed signal integrated circuits. The Chief Executive Officer has been identified as the Chief Operating Decision Maker as defined by guidance regarding segment disclosures. The Company has evaluated its reportable segments subsequent to its acquisition of Gennum and concluded that it continues to operate and account for its results in one reportable segment.

Use of Estimates

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Reclassification

Reclassification

Certain prior period immaterial amounts have been reclassified to conform with current period presentation.

Cash, Cash Equivalents, and Investments

Cash, Cash Equivalents and Investments

The Company considers all highly liquid investments with an original maturity of 90 days or less to be cash equivalents. The Company maintains cash balances and investments in highly qualified financial institutions. At various times such amounts are in excess of insured limits. Investments consist of government and corporate obligations and bank time deposits. The Company’s investment policy restricts investments to high credit quality investments with limits on the length to maturity and the amount invested with any one issuer. These investments, especially corporate obligations, are subject to default risk. The Company designates its investments as available for sale (“AFS”). Investments designated as AFS are reported at fair value. The Company records the unrealized gains and losses, net of tax, in stockholders’ equity as a component of comprehensive income. Realized gains or losses are recorded in “Interest income and other expense, net” in the consolidated statements of income.

Accounts Receivable and Allowance for Doubtful Accounts

Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable are recorded at net realizable value or the amount that the Company expects to collect on gross customer trade receivables. The Company evaluates the collectability of its accounts receivable based on a combination of factors. The Company generally does not require collateral on accounts receivable as the majority of the Company’s customers are large, well-established companies. Historically, bad debt provisions have been consistent with management’s expectations. If the Company becomes aware of a customer’s inability to meet its financial obligations after a sale has occurred, it records an allowance to reduce the net receivable to the amount it reasonably believes it will be able to collect from the customer. For all other customers, the Company recognizes allowances for doubtful accounts based on the length of time the receivables are past due, the current business environment and historical experience. If the financial condition of the Company’s customers were to deteriorate or if economic conditions worsen, additional allowances may be required in the future. All of the Company’s accounts receivables are trade-related receivables. See Note 16 for a discussion of concentration risks.

Inventories

Inventories

Inventories are stated at lower of cost or market and consist of materials, labor and overhead. The Company determines the cost of inventory by the first-in, first-out method. The Company evaluates inventories for excess quantities and obsolescence. This evaluation includes analyses of sales levels by product and projections of future demand. In order to state the inventory at lower of cost or market, the Company maintains reserves against its inventory. If future demand or market conditions are less favorable than the Company’s projections, a write-down of inventory may be required, and would be reflected in cost of goods sold in the period the revision is made.

Business Combinations

Business Combinations

The Company accounts for business combinations at fair value. Goodwill is measured as the excess of consideration transferred over the acquisition date net fair values of the assets acquired and the liabilities assumed. All changes that do not qualify as measurement period adjustments are included in current period earnings. Significant judgment is required to determine the estimated fair value for assets and liabilities acquired and to assigning their respective useful lives. The fair values assigned to tangible and intangible assets acquired and liabilities assumed, including contingent consideration, are based on management’s estimates and assumptions, as well as other information compiled by management, including available historical information and valuations that utilize customary valuation procedures and techniques.

The Company employs the income approach to estimate the fair value of intangible assets, which is based on forecasts of the expected future cash flows attributable to the respective assets. The fair value of acquired in-process research and development projects (“IPR&D”) was determined using an income approach or replacement cost approach as applicable. The replacement cost approach was used for IPR&D projects that were considered long-term core investments and were not anticipated to be profitable for a period of time. IPR&D projects which were valued using an income approach, measured the returns attributable to each specific IPR&D project, discounted to present value using a risk-adjusted rate of return, including as appropriate, any tax benefits derived from amortizing the intangible assets for tax purposes. Significant estimates and assumptions inherent in the valuations reflect consideration of other marketplace participants, and include the amount and timing of future cash flows (including expected growth rates and profitability), the underlying product life cycles, economic barriers to entry, a brand’s relative market position and the discount rate applied to the cash flows, among others.

If actual results differ from the estimates and judgments used in these estimates, the amounts recorded in the financial statements could result in a possible impairment of the intangible assets and goodwill, or require acceleration of the amortization expense of finite-lived intangible assets.

Property, Plant and Equipment

Property, Plant and Equipment

Property, plant and equipment are stated at cost. The Company’s cost basis includes certain assets acquired in business combinations that were initially recorded at fair value as of the date of acquisition. Depreciation is computed over the estimated useful lives of the related asset type or term of the operating lease using the straight-line method for financial statement purposes. Maintenance and repairs are charged to expense as incurred and the costs of additions and betterments that increase the useful lives of the assets are capitalized.

Impairment of Goodwill, Other Intangible and Long-Lived Assets

Impairment of Goodwill, Other Intangible and Long-Lived Assets

Goodwill

Goodwill is the excess of the purchase price over the fair value of identifiable net assets acquired in business combinations accounted for under the purchase method. Goodwill is not amortized but is tested for impairment using a two-step method on an annual basis in the fourth quarter or whenever events or changes in circumstances indicate that the carrying value may not be recoverable. These indicators would include a significant change in operating performance, the business climate, legal factors, competition, or a planned sale or disposition of a significant portion of the business among other factors.

The recoverability of goodwill is measured at the reporting unit level by comparing the reporting unit’s carrying amount, including goodwill, to the fair market value of the reporting unit. A reporting unit is an operating segment or a business unit one level below that operating segment, and it is the level at which management regularly reviews operating results and makes resource allocation decisions.

Step one is the identification of potential impairment. This involves comparing the fair value of each reporting unit with its carrying amount, including goodwill. If the fair value of a reporting unit exceeds the carrying amount, the goodwill of the reporting unit is considered not impaired and the second step of the impairment test is unnecessary. If the carrying amount of a reporting unit exceeds its fair value, the second step of the impairment test is performed to measure the amount of impairment loss, if any.

Step two is the measurement of the amount of impairment loss. This involves comparison of the implied fair value of the reporting unit goodwill with the carrying amount of that goodwill. If the carrying amount of the reporting unit goodwill exceeds the implied fair value of that goodwill, an impairment loss would be recognized in an amount equal to that excess. The loss recognized cannot exceed the carrying amount of the goodwill. Once a goodwill impairment loss is recognized, the adjusted carrying amount becomes the accounting basis.

The fair value of goodwill is tested for impairment on a non-recurring basis in the accompanying consolidated financial statements using Level 3 inputs. The Company’s estimate of fair value was primarily determined using the income approach methodology of valuation that includes the discounted cash flow method as well as other generally accepted valuation methodologies to determine the fair value of the assets. Changes in economic and operating conditions that occur after the annual impairment analysis or an interim impairment analysis that impact these assumptions may result in a future goodwill impairment charge.

Other Intangibles and Long-lived Assets

Finite-lived intangible assets resulting from business acquisitions or technology licenses purchased are amortized on a straight-line basis over their estimated useful lives. The useful lives of acquisition-related intangible assets represent the point where over 90% of realizable undiscounted cash flows for each intangible asset are recognized. The assigned useful lives are consistent with the Company’s historical experience with similar technology and other intangible assets owned by the Company. The useful life of technology licenses is usually based on the term of the agreement.

In-process research and development is recorded at fair value as of the date of acquisition as an indefinite-lived intangible asset until the completion or abandonment of the associated research and development efforts or impairment. Upon completion of development, acquired in-process research and development assets are transferred to finite-lived intangible assets and amortized over their useful lives.

The Company reviews indefinite-lived intangible assets for impairment on an annual basis in conjunction with goodwill or whenever events or changes in circumstances indicate the carrying value may not be recoverable. Recoverability of indefinite-lived intangible assets is measured by comparing the carrying amount of the asset to the future discounted cash flows the asset is expected to generate.

Investments

Investments that have original maturities of three months or less are accounted for as cash equivalents. This includes money market funds, time deposits and U.S. government obligations. Temporary and long-term investments consist of government, bank and corporate obligations, and bank time deposits with original maturity dates in excess of three months. Temporary investments have original maturities in excess of three months, but mature within twelve months of the balance sheet date. Long-term investments have original maturities in excess of twelve months. The Company determines the cost of securities sold based on the specific identification method. Realized gains or losses are reported in “Interest income and other expense, net” on the consolidated statements of income.

The Company classifies its investments as “available for sale” because it may sell some securities prior to maturity. The Company’s investments are subject to market risk, primarily interest rate and credit risks. The Company’s investments are managed by a limited number of outside professional managers that operate within investment guidelines set by the Company. These guidelines include specified permissible investments, minimum credit quality ratings and maximum average duration restrictions and are intended to limit market risk by restricting the Company’s investments to high quality debt instruments with relatively short-term maturities.

Fair Value Measurement

Fair Value Measurements

When determining the fair value measurements for assets and liabilities required or permitted to be recorded at fair value, the Company considers the principal or most advantageous market in which it would transact and considers assumptions that market participants would use when pricing the asset or liability, such as inherent risk, transfer restrictions, and risk of nonperformance. The Company uses the following three levels of inputs in determining the fair value of the Company’s assets and liabilities, focusing on the most observable inputs when available:

Level 1 - Quoted prices in active markets for identical assets or liabilities.

Level 2 - Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets with insufficient volume or infrequent transactions (less active markets); or model-derived valuations in which all significant inputs are observable or can be derived principally from or corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3 - Unobservable inputs to the valuation methodology that are significant to the measurement of fair value of assets or liabilities.

To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes, the level in the fair value hierarchy within which the fair value measurement is disclosed is determined based on the lowest level input that is significant to the fair value measurement.

Fair Value of Financial Instruments

Assets and Liabilities Recorded at Fair Value on a Non-Recurring Basis

The Company reduces the carrying amounts of its goodwill, intangible assets, long-lived assets and non-marketable equity security to fair value when held for sale or determined to be impaired.

For its investment in equity interests, the Company has not identified events or changes in circumstances that may have a significant adverse effect on the fair value of its cost method investment during the last three months of fiscal year 2013.

Available-for-sale securities included in Level 2 are valued utilizing inputs obtained from an independent service (the “Service”), which uses quoted market prices for identical or comparable instruments rather than direct observations of quoted prices in active markets. The Service gathers observable inputs for all of our fixed income securities from a variety of industry data providers, for example, large custodial institutions and other third-party sources. Once the observable inputs are gathered by the Service, all data points are considered and an average price is determined. The Service’s providers utilize a variety of inputs to determine their quoted prices. The Company reviews and evaluates the values provided by the Service and agrees with the valuation methods and assumptions used in determining the fair value of investments. The Company believes this method provides a reasonable estimate for fair value.

The fair value of the interest rate cap at January 27, 2013 is estimated as described in Note 11 and is included in “Other assets” on the consolidated balance sheet.

Instruments Not Recorded at Fair Value on a Recurring Basis

Some of the Company’s financial instruments are not measured at fair value on a recurring basis but are recorded at amounts that approximate fair value due to their liquid or short-term nature. Such financial assets and financial liabilities include: cash and cash equivalents, receivables, net, certain other assets, accounts payable and accrued expenses, accrued personnel costs, and other current liabilities.

The Company’s long-term debt is not recorded at fair value on a recurring basis, but is measured at fair value for disclosure purposes. The fair value of the Company’s debt is estimated primarily based on quotes (“ask prices”) provided by pricing services generated in a market with insufficient volume to comprise an active market (Level 2 inputs) based on the Company’s debt obligations. The fair value of the Company’s debt was $336.7 million at January 27, 2013.

Interest Rate Derivative

Interest Rate Derivative

The Company incurs interest expense through its variable rate debt. To manage its interest rate risk, the Company occasionally hedges the future cash flows of its variable rate debt, principally through interest rate contracts with major financial institutions. Interest rate contracts that meet specific criteria are accounted for as cash flow hedges.

The Company’s objective in using interest rate contracts is to add stability to interest expense and to manage its exposure to interest rate movements. To accomplish this objective, the Company uses interest rate contracts as part of its interest rate risk management strategy. Interest rate cap contracts involve the receipts of variable amounts from a counterparty when one-month LIBOR exceeds the capped interest rate in exchange for an upfront payment from the Company, capping the Company’s one-month LIBOR floating interest payments at the strike rate on its interest rate cap contract.

The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive income and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. The upfront payment the Company paid for the interest rate cap agreement will be amortized out of accumulated other comprehensive income and recorded as interest expense according to the amortization schedule created at inception of the hedging relationship. The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings. The Company records derivative instruments in the statements of cash flows to operating, investing, or financing activities consistent with the cash flows of the hedged item.

Revenue Recognition

Revenue Recognition

The Company recognizes product revenue when persuasive evidence of an arrangement exists, delivery has occurred, the fee is fixed or determinable and collectability is probable. Recovery of costs associated with product design and engineering services are recognized during the period in which services are performed. The product design and engineering recovery, when recognized, will be reported as a reduction to product development and engineering expense. Historically, these recoveries have not exceeded the cost of the related development efforts.

The Company includes revenue related to granted technology licenses as part of “Net sales.” Historically, revenue from these arrangements has not been significant though it is part of its recurring ordinary business. In the third quarter of fiscal year 2013, the Company entered into a single licensing arrangement that resulted in the recognition of $7.5 million of revenue.

The Company defers revenue recognition on shipment of products to certain customers, principally distributors, under agreements which provide for limited pricing credits or return privileges, until these products are sold through to end-users or the return privileges lapse. For sales subject to certain pricing credits or return privileges, the amount of future pricing credits or inventory returns cannot be reasonably estimated given the relatively long period in which a particular product may be held by the customer. Therefore, the Company has concluded that sales to customers under these agreements are not fixed and determinable at the date of the sale and revenue recognition has been deferred. The Company estimates the deferred gross margin on these sales by applying an average gross profit margin to the actual gross sales. The average gross profit margin is calculated for each category of material using standard costs which is expected to approximate actual costs at the date of sale. The estimated deferred gross margins on these sales, where there are no outstanding receivables, are recorded on the consolidated balance sheets under the heading of “Deferred revenue.”

The Company records a provision for estimated sales returns in the same period as the related revenues are recorded. The Company bases these estimates on historical sales returns and other known factors. Actual returns could be different from Company estimates and current provisions for sales returns and allowances, resulting in future charges to earnings.

Cost of Sales

Cost of Sales

Cost of sales includes materials, depreciation on fixed assets used in the manufacturing process, shipping costs, direct labor and overhead.

Sales and Marketing

Sales and Marketing

The Company expenses sales and marketing costs, which include advertising costs, as they are incurred.

Product Development and Engineering

Product Development and Engineering

Product development and engineering costs are charged to expense as incurred. Recoveries from nonrecurring engineering services are recorded as an offset to product development expense incurred in support of this effort since these activities do not represent an earnings process core to the Company’s business and serve as a mechanism to partially recover development expenditures.

Income Taxes

Income Taxes

The Company accounts for income taxes using the asset and liability method. Under this method, deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts and their respective tax bases. The consolidated balance sheets include current and long term prepaid taxes under “Prepaid taxes” and “Other assets” and current and long term liabilities for uncertain tax positions under “Accrued liabilities” and “Other long-term liabilities.”

As part of the process of preparing the Company’s consolidated financial statements, the Company estimates income taxes in each of the jurisdictions in which it operates. This process involves estimating the current tax liability together with assessing temporary differences resulting from differing treatment of items for tax and accounting purposes. These differences result in deferred tax assets and liabilities. The Company must assess the likelihood that its deferred tax assets will be recovered from future taxable income and, to the extent the Company believes that recovery is not likely, it must establish a valuation allowance. To the extent the Company changes its valuation allowance in a period; the change is generally recorded through the tax provision on the consolidated statements of income.

The income tax effects of share-based payments are recognized for financial reporting purposes only if such awards are expected to result in a tax deduction. The Company does not recognize a deferred tax asset for an excess tax benefit (that is, a tax benefit that exceeds the tax benefit for the amount of compensation cost recognized for the award for financial reporting purposes) that has not been realized. In determining when an excess tax benefit is realized, the Company has elected to follow the ordering provision of the tax law.

For intra-entity differences between the tax basis of an asset in the buyer’s tax jurisdiction and their cost as reported in the consolidated financial statements, the Company does not recognize a deferred tax asset. Income taxes paid on intra-entity profits on assets remaining within the group are accounted for as prepaid taxes.

Accumulated Other Comprehensive Income

Accumulated Other Comprehensive Income

Other comprehensive income includes unrealized gains and losses on available-for-sale investments, unrealized loss on interest rate hedging activities and foreign currency translation adjustments, net of tax. This information is provided in our consolidated statements of comprehensive Income.

Translation

Translation

The assets and liabilities of the Company’s foreign subsidiaries that operate in a local currency environment, where that local currency is the functional currency, are translated to the U.S. dollar using exchange rates in effect at the balance sheet date. Income statement items are translated at average exchange rates prevailing during the period. The translation gains or losses are included as a component of accumulated other comprehensive income in the accompanying consolidated financial statements.

Transaction gains and losses resulting from the re-measurement or settlement of assets and liabilities denominated in foreign currencies are included in the determination of net income and have not been significant.

Share-Based Compensation

Stock-Based Compensation

The Company has various equity award plans (“Plans”) that provide for granting stock based awards to employees and non-employee directors of the Company. The Plans provide for the granting of several available forms of stock compensation. As of January 27, 2013, the Company has granted stock option awards (“Options”) and restricted stock unit awards (“RSU”) under the Plans and has also issued some stock-based compensation outside of any plan, including options and restricted stock awards issued as inducements to join the Company.

Share-based Payment Arrangements

The Company has various equity award plans that provide for granting stock-based awards to employees and non-employee directors of the Company. The plans provide for the granting of several available forms of stock compensation. As of January 27, 2013, the Company has granted options and restricted stock under the plans and has also issued some stock-based compensation outside of the plans, including options and restricted stock issued as inducements to join the Company.

Grant Date Fair Values and Underlying Assumptions; Contractual Terms

The Company uses the Black-Scholes pricing model to value options. For awards classified as equity, stock-based compensation cost is measured at grant date, based on the fair value of the award, and is recognized as an expense over the employee’s or director’s requisite service period. For awards classified as liabilities, stock-based compensation cost is measured at fair value at the end of each reporting date until the date of settlement, and is recognized as an expense over the employee’s or director’s requisite service period. Expected volatilities are based on historical volatility using daily and monthly stock price observations.

Earnings per Share

Basic earnings per common share is computed by dividing income available to common shareholders by the weighted-average number of shares of common stock outstanding during the reporting period. Diluted earnings per common share incorporates the incremental shares issuable, calculated using the treasury stock method, upon the assumed exercise of stock options and the vesting of restricted stock.

Contingencies

Contingencies

The Company accrues an undiscounted liability for contingencies where the incurrence of a loss is probable and the amount can be reasonably estimated, and the Company discloses the amount accrued and the amount of a reasonably possible loss in excess of the amount accrued, if such disclosure is necessary for our financial statements not to be misleading. The Company does not record liabilities when the likelihood that the liability has been incurred is probable but the amount cannot be reasonably estimated, or when the liability is believed to be only reasonably possible or remote.

Because litigation outcomes are inherently unpredictable, the Company’s evaluation of legal proceedings often involves a series of complex assessments by management about future events and can rely heavily on estimates and assumptions. If the assessments indicate that loss contingencies that could be material to any one of our financial statements are not probable, but are reasonably possible, or are probable, but cannot be estimated, then the Company discloses the nature of the loss contingencies, together with an estimate of the range of possible loss or a statement that such loss is not reasonably estimable.

Subsequent Events

Subsequent Events

The Company evaluates all events through the issuance date of the consolidated financial statements to determine whether any subsequent events have occurred that require recognition or disclosure.

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Significant Accounting Policies (Tables)

12 Months Ended

Jan. 27, 2013

Accounting Policies [Abstract]

Schedule of property, plant and equipment

The estimated service lives for property and equipment is as follows:

	Estimated
	Useful Lives
Buildings and leasehold improvements	7 to 39 years
Machinery and equipment	5 to 8 years
Transportation vehicles	5 years
Furniture and fixtures	7 years
Computers and computer software	3 years

Schedule of deferred revenue

The following table summarizes the deferred revenue balance:

(in thousands)	January 27, 2013		January 29, 2012
Deferred revenues	$	4,467	$	4,964
Deferred cost of revenues	1,099		1,243
Deferred revenue, net	3,368		3,721
Deferred product design and engineering recoveries	377		132
Total deferred revenue	$	3,745	$	3,853

Schedule of accumulated other comprehensive income (loss)

Accumulated other comprehensive income balances were as follows:

(in thousands)	Unrealized holding gain (loss) on available-for-sale investments (1)			Unrealized loss on interest rate hedge			Cumulative translation adjustment			Accumulated other comprehensive income
Balance at January 31, 2010	$	317		$	—		$	501		$	818
Current-period other comprehensive (loss) income	(76		)	—			1			(75		)
Balance at January 30, 2011	241			—			502			743
Current-period other comprehensive loss	(204		)	—			(4		)	(208		)
Balance as of January 29, 2012	37			—			498			535
Current-period other comprehensive (loss) income	(32		)	(353		)	203			(182		)
Balance as of January 27, 2013	$	5		$	(353	)	$	701		$	353

(1) Net of reclassification adjustments for gains realized, net of tax from other comprehensive income to net income $1 and $5 for the fiscal years 2013 and 2012, respectively. There were no reclassification adjustments for gains realized in fiscal year 2011.

Schedule of earnings per share calculation, basic and diluted

The computation of basic and diluted earnings per common share was as follows:

	Fiscal Year Ended
(in thousands, except per share amounts)	January 27, 2013		January 29, 2012		January 30, 2011
Net income	$	41,939	$	89,087	$	72,572
Weighted average common shares outstanding - basic	65,809		65,099		62,339
Dilutive effect of employee equity incentive plans	1,663		2,251		2,184
Weighted average common shares outstanding - diluted	67,472		67,350		64,523
Basic earnings per common share	$	0.64	$	1.37	$	1.16
Diluted earnings per common share	$	0.62	$	1.32	$	1.12
Anti-dilutive shares not included in the above calculations	783		625		1,700

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Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Cash flows from operating activities:
Net income	$ 41,939	$ 89,087	$ 72,572
Adjustments to reconcile net income to net cash provided by operating activities, net of effects of acquisitions:
Depreciation, amortization and impairments	49,192	21,013	16,448
Effect of acquisition fair value adjustments	37,693	0	0
Accretion of deferred financing costs and debt discount	2,545	0	0
Deferred income taxes	(47,623)	(2,023)	3,184
Stock-based compensation	24,528	24,020	29,010
Excess tax benefits on stock based compensation	0	(2,279)	(891)
Loss on disposition of property, plant and equipment	85	1,022	69
Changes in assets and liabilities:
Accounts receivable, net	(5,002)	966	(19,447)
Inventories	(4,251)	676	(14,016)
Prepaid expenses and other assets	5,971	(7,068)	(540)
Accounts payable	4,453	(3,354)	5,986
Accrued liabilities	(10,410)	(26,017)	13,434
Deferred revenue	(1,112)	(1,167)	1,744
Income taxes payable and prepaid taxes	(1,120)	4,962	(16,702)
Other liabilities	5,080	(6)	2,950
Net cash provided by operating activities	101,968	99,832	93,801
Cash flows from investing activities:
Purchases of available-for-sale investments	(24,744)	(93,330)	(168,802)
Proceeds from sales and maturities of available-for-sale investments	112,466	131,748	110,987
Proceeds from sales of property, plant and equipment	0	46	76
Purchase of property, plant and equipment	(23,266)	(21,564)	(25,537)
Purchase of intangible assets	(1,251)	(3,000)	0
Purchase of cost method investment	(2,500)	0	0
Acquisitions, net of cash acquired	(491,717)	0	0
Net cash (used in) provided by investing activities	(431,012)	13,900	(83,276)
Cash flows from financing activities:
Proceeds from debt issuance, net of discount	347,000	0	0
Deferred financing cost	(8,962)	0	0
Payment for interest rate cap	(1,100)	0	0
Excess tax benefits on stock based compensation	0	2,279	891
Proceeds from exercises of stock options	12,855	42,661	29,823
Repurchase of outstanding common stock	(7,769)	(50,665)	(2,819)
Payment of long term debt	(16,875)	0	0
Net cash provided by (used in) financing activities	325,149	(5,725)	27,895
Effect of exchange rate increase (decrease) on cash and cash equivalents	65	(4)	1
Net (decrease) increase in cash and cash equivalents	(3,830)	108,003	38,421
Cash and cash equivalents at beginning of period	227,022	119,019	80,598
Cash and cash equivalents at end of period	223,192	227,022	119,019
Supplemental disclosure of cash flow information
Income taxes paid	5,029	4,059	20,566
Interest paid	$ 10,556	$ 0	$ 0

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Acquisitions (Tables)

12 Months Ended

Jan. 27, 2013

Schedule of Pro forma Information

Unaudited Consolidated Pro forma Information:

	Fiscal Year Ended
	January 27, 2013		January 29, 2012
(in thousands)	(unaudited)		(unaudited)
Revenue	$	603,067	$	604,906
Net income	$	56,980	$	66,377

Gennum

Schedule of purchase price allocation

The Company’s allocation of the total purchase price as of March 20, 2012 is summarized below:

(in thousands)	At March 20, 2012
Cash	$	19,664
Accounts receivable, less allowances	14,032
Inventories	62,941
Prepaid expenses	3,832
Income taxes receivable	1,467
Deferred tax assets - current	8,590
Other current assets	7,804
Property, plant and equipment	25,702
Amortizable intangible assets	129,863
In-process research and development	29,100
Goodwill	261,891
Deferred tax assets - non-current	31,235
Other non-current assets	8
Deferred tax liabilities	(47,077		)
Accounts payable	(18,232		)
Accrued liabilities	(24,274		)
Total acquisition consideration	$	506,546
(in thousands)	At March 20, 2012
Amortizable intangible assets:
Developed technology	$	95,100
Customer relationships	28,000
Other intangible assets	6,763
	$	129,863

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Stock-Based Compensation - Narrative (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax benefit realized from option exercise	$ 14.3	$ 12.9	$ 7.1
Performance unit awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
The maximum number of shares earned for performance unit awards	696,400
The maximum number of shares issued for performance unit awards	353,200
Remaining value of shares which would be settled in cash	343,200
Percentage of units granted in fiscal year 2009 vested	85.00%
Percentage of units granted in fiscal year 2010 expected to vest	200.00%
Target performance metrics for performance unit awards, fiscal year 2013	100.00%
Target performance metrics for performance unit awards, fiscal year 2012	108.00%
Target performance metrics for performance unit awards, fiscal year 2011	200.00%
Employee stock unit awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Non-employee director stock unit awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Vested but unsettled stock units	141,155
Minimum | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Minimum | Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Maximum | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Maximum | Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years

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Geographic Information and Concentration of Risk - Schedule of Significant Customers Having an Outstanding Receivable Balance that Represents at Least 10% of Total Net Receivables (Details) (Accounts receivable)	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012
Geographic Information And Concentration Of Risk [Line Items]
Minimum concentration risk threshold	10.00%
Samsung Electronics (and affiliates)
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	12.00%	14.00%
Huawei Technologies (and affiliates)
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	14.00%	11.00%
Frontek Technology Corp
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	4.00%	10.00%
Dragon Technology
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	3.00%	11.00%

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Stock-Based Compensation (Tables)

12 Months Ended

Jan. 27, 2013

Share-based Compensation [Abstract]

Schedule of allocation of stock-based compensation

The following table shows total pre-tax, stock-based compensation expense included in the consolidated statements of income for fiscal years 2013, 2012 and 2011.

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Cost of sales	$	1,218		$	983		$	1,802
Selling, general and administrative	14,965			15,839			19,310
Product development and engineering	8,345			7,198			7,898
Stock-based compensation, pre-tax	$	24,528		$	24,020		$	29,010
Net change in stock-based compensation capitalized into inventory	$	(33	)	$	(83	)	$	(116	)

Schedule of net impact of stock based compensation after tax on net income

The below table summarizes the net impact of stock-based compensation, after tax, on net income for fiscal years 2013, 2012 and 2011.

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Stock-based compensation	$	24,528		$	24,020		$	29,010
Associated tax effect	(5,120		)	(5,693		)	(9,170		)
Net effect on net income	$	19,408		$	18,327		$	19,840

Schedule of fair value assumptions

The following table summarizes the assumptions used in the Black-Scholes model to determine the fair value of options granted in fiscal years 2013, 2012 and 2011:

	Fiscal Year Ended
	January 27, 2013	January 29, 2012	January 30, 2011
Expected lives, in years	4.4 - 4.6	4.4 - 4.7	4.3 - 5.1
Estimated volatility	38% - 41%	40% - 41%	39% - 40%
Dividend yield	—	—	—
Risk-free interest rate	0.66% - 0.73%	0.71% - 1.8%	1.2% - 2.3%
Weighted average fair value on grant date	$9.52	$8.43	$6.56

Schedule of summary of the activity for stock option awards

A summary of the activity for stock option awards for fiscal years 2013, 2012 and 2011 is presented below:

(in thousands, except for per share amounts)	Number of Shares		Weighted Average Exercise Price (per share)		Aggregate Intrinsic Value (1)		Aggregate Unrecognized Compensation		Number of Shares Exercisable	Weighted Average Contractual Term (years)
Balance at January 31, 2010	9,151		$	16.44	$	8,998	$	9,436	6,302
Options granted	403		17.61
Options exercised	(2,329	)	14.22		11,495
Options cancelled/forfeited	(603	)	21.35
Balance at January 30, 2011	6,622		16.84		35,492		7,067		5,160
Options granted	343		24.05
Options exercised	(2,781	)	16.64		22,537
Options cancelled/forfeited	(494	)	22.30
Balance at January 29, 2012	3,690		16.94		44,435		4,699		2,767
Options granted	258		28.21
Options exercised	(1,254	)	15.70		14,508
Options cancelled/forfeited	(115	)	25.30
Balance at January 27, 2013	2,579		$	18.29	$	29,789	$	3,817	1,937
Exercisable at January 27, 2013	1,937		$	16.51	$	25,822				2.1
Vested and expected to vest after January 27, 2013	2,495		$	18.10	$	29,293				2.6

(1) Represents the difference between the exercise price and the value of the Company’s stock at the time of exercise, for exercised grants. For outstanding awards, represents the difference between the exercise price and the value of the Company’s stock at fiscal year end.

Schedule of stock option exercise price range

The following table summarizes information about stock options outstanding at January 27, 2013.

(number of shares in thousands)	Number of Shares	Weighted Average Exercise Price (per share)		Weighted Average Contractual Term (years)
Price Range Analysis - Outstanding
$1.15 - $4.53	9	$	2.52	4.3
$7.79 - $13.15	247	11.59		2.1
$13.76 - $20.90	1,671	16.58		2.1
$21.02 - $29.68	652	25.43		4.4
Total outstanding	2,579	$	18.29	2.7
Price Range Analysis - Exercisable
$1.15 - $4.53	9	$	2.52	4.3
$7.79 - $13.15	241	11.62		2.0
$13.76 - $20.90	1,494	16.52		2.0
$21.02 - $29.68	193	23.18		2.8
Total exercisable	1,937	$	16.51	2.1

Schedule of unrecognized compensation cost, nonvested awards

The following table summarizes information regarding unvested stock option awards at January 27, 2013:

(in thousands, except for per share amounts)	Number of Shares		Weighted Average Exercise Price (per share)		Weighted Average Grant Date Fair Value (per share)		Weighted Average Remaining Expense Period (years)	Total Fair Value
Balance at January 31, 2010	2,849		$	13.31	$	7.48	1.9	$	21,311
Options granted	403		17.61		6.56			2,644
Options vested	(1,575	)	13.07		8.26			13,006
Options forfeited	(215	)	11.57		8.56			1,845
Balance at January 30, 2011	1,462		15.00		6.23		1.9	$	9,103
Options granted	343		24.05		8.43			2,893
Options vested	(650	)	14.30		6.33			4,115
Options forfeited	(231	)	16.59		6.39			1,479
Balance at January 29, 2012	924		18.47		6.99		1.8	$	6,452
Options granted	258		28.21		9.52			2,457
Options vested	(484	)	16.42		6.49			3,144
Options forfeited	(56	)	21.69		7.74			432
Balance at January 27, 2013	642		$	23.66	$	8.31	1.9	$	5,333

Schedule of summary of the activity for restricted stock awards

The following table summarizes the activity for restricted stock awards for fiscal years 2013, 2012 and 2011:

(in thousands, except for per share amounts)	Number of Shares		Weighted Average Grant Date Fair Value (per share)		Aggregate Intrinsic Value (1)		Aggregate Unrecognized Compensation		Weighted Average Period Over Which Expected to be Recognized (in years)
Balance at January 31, 2010	418		$	15.15			$	3,193	1.2
Restricted stocks granted	—
Restricted stocks vested	(270	)	17.33		$	4,678
Restricted stocks cancelled	(13	)	17.44
Balance at January 30, 2011	135		14.44				984		0.8
Restricted stocks granted	—
Restricted stocks vested	(91	)	14.29		2,201
Restricted stocks cancelled	(12	)	15.25
Balance at January 29, 2012	32		14.57				81		0.1
Restricted stocks granted	—
Restricted stocks vested	(32	)	14.57		$	902
Restricted stocks cancelled	—
Balance at January 27, 2013	—		$	—			$	—	—

(1) Represents the value of Semtech stock on the date that the restricted stock vested.

Schedule of summary of the activity for performance unit awards

The following table summarizes the activity for performance units during fiscal years 2013, 2012 and 2011:

			Subject to Share Settlement		Subject to Cash Settlement					Weighted  Average Grant Date		Aggregate		Period Over Which Expected
(in thousands, except for per share amounts)	Total Units		Units		Units		Recorded Liability			Fair Value (per share)		Unrecognized Compensation		to be Recognized (in years)
Balance at January 31, 2010	593		363		230		$	259		$	14.29	$	580	1.3
Performance units granted	143		72		71					16.68
Performance units vested	—		—		—		—			—
Performance units cancelled/forfeited	(180	)	(109	)	(71	)				16.28
Change in liability							3,666			—
Balance at January 30, 2011	556		326		230		3,925			14.26		7,971		1.0
Performance units granted	117		59		58					23.33
Performance units vested	(218	)	(157	)	(61	)	(1,335		)	14.74
Performance units cancelled/forfeited	(95	)	(48	)	(47	)				15.26
Change in liability							3,444
Balance at January 29, 2012	360		180		180		6,034			16.65		4,829		1.0
Performance units granted	144		77		67					29.30
Performance units vested	(144	)	(72	)	(72	)	(4,172		)	11.92
Performance units cancelled/forfeited	(7	)	(4	)	(3	)				29.35
Change in liability							2,560
Balance at January 27, 2013	353		181		172		$	4,422		$	23.50	$	4,754	1.1

Schedule of summary of the activity for employee stock unit awards

The following table summarizes the stock unit award activity for fiscal years 2013, 2012 and 2011:

(in thousands, except per share amount)	Number of Units		Weighted Average Grant Date Fair Value (per unit)		Aggregate Intrinsic Value (1)		Aggregate Unrecognized Compensation		Weighted Average Period Over Which Expected to be Recognized (in years)
Balance at January 31, 2010	1,410		$	15.72			$	17,713	3.4
Stock units granted	1,181		17.62
Stock units vested	(404	)	19.20		$	7,749
Stock units forfeited	(129	)	19.50
Balance at January 30, 2011	2,058		16.70				29,763		2.7
Stock units granted	810		22.74
Stock units vested	(627	)	16.61		14,333
Stock units forfeited	(259	)	17.75
Balance at January 29, 2012	1,982		19.06				31,472		2.4
Stock units granted	1,517		26.73
Stock units vested	(699	)	18.20		$	18,438
Stock units forfeited	(242	)	23.65
Balance at January 27, 2013	2,558		$	23.41			$	49,374	2.5

(1) Reflects the value of Semtech stock on the date that the stock unit vested.

Schedule of summary of the activity for non-employee directors stock unit awards

The following table summarizes the activity for stock unit awards for fiscal years 2013, 2012 and 2011:

(in thousands, except per share amount)	Number of Units		Recorded Liability		Weighted Average Grant Date Fair Value (per unit)		Aggregate Unrecognized Compensation		Period Over Which Expected to  be Recognized (in years)
Balance at January 31, 2010	35		$	1,389	$	16.18	$	232	0.4
Stock units granted	30				16.43
Stock units vested	(35	)			16.18
Stock units forfeited	—
Change in liability			1,025
Balance at January 30, 2011	30		2,414		16.43		269		0.4
Stock units granted	18				27.60
Stock units vested	(30	)			16.43
Stock units forfeited	—
Change in liability			1,459
Balance at January 29, 2012	18		3,873		27.60		216		0.4
Stock units granted	20				24.46
Stock units vested	(18	)			27.60
Stock units forfeited	—
Change in liability			684
Balance at January 27, 2013	20		$	4,557	$	24.46	$	253	0.4

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Significant Accounting Policies - Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 27, 2013		Jan. 29, 2012		Jan. 30, 2011
Unrealized holding gain (loss) on available-for-sale investments
Beginning balance	$ 37	[1]	$ 241	[1]	$ 317	[1]
Current-period other comprehensive (loss) income	(32)	[1]	(204)	[1]	(76)	[1]
Ending balance	5	[1]	37	[1]	241	[1]
Unrealized loss on interest rate hedge
Beginning balance	0		0		0
Current-period other comprehensive (loss) income	(353)		0		0
Ending balance	(353)		0		0
Cumulative translation adjustment
Beginning balance	498		502		501
Current-period other comprehensive (loss) income	203		(4)		1
Ending balance	701		498		502
Accumulated other comprehensive income
Beginning balance	535		743		818
Other comprehensive loss, net of tax	(182)		(208)		(75)
Ending balance	353		535		743
Net of reclassification adjustments for gains realized, net of tax from other comprehensive income to net income	$ 1		$ 5		$ 0

[1] Net of reclassification adjustments for gains realized, net of tax from other comprehensive income to net income $1 and $5 for the fiscal years 2013 and 2012, respectively. There were no reclassification adjustments for gains realized in fiscal year 2011.

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Goodwill and Intangible Assets - Goodwill Balances (Details) (USD $) In Thousands, unless otherwise specified			12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 27, 2013 Gennum	Jan. 27, 2013 Wireless And Sensing Reporting Unit Cycleo
Goodwill [Roll Forward]
Beginning balance	$ 393,584	$ 129,651
Goodwill acquired during period			261,891	2,042
Ending balance	$ 393,584	$ 129,651

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Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 27, 2013	Oct. 28, 2012	Jul. 29, 2012	Apr. 29, 2012	Jan. 29, 2012	Oct. 30, 2011	Jul. 31, 2011	May 01, 2011	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Net sales	$ 150,603	$ 160,878	$ 150,704	$ 116,642	$ 104,032	$ 123,944	$ 130,254	$ 122,371	$ 578,827	$ 480,601	$ 454,502
Cost of sales	62,646	64,085	76,179	61,305	44,368	50,537	51,534	48,517	264,215	194,956	186,196
Gross profit	87,957	96,793	74,525	55,337	59,664	73,407	78,720	73,854	314,612	285,645	268,306
Operating costs and expenses:
Selling, general and administrative	37,386	35,646	31,220	44,818	26,333	25,110	22,481	26,705	149,070	100,629	110,404
Product development and engineering	29,959	33,354	32,613	24,083	19,335	20,489	22,228	18,525	120,009	80,577	69,624
Intangible amortization and impairments	8,177	8,212	7,977	5,578	2,075	4,573	2,103	2,102	29,944	10,853	9,520
Total operating costs and expenses	75,522	77,212	71,810	74,479	47,743	50,172	46,812	47,332	299,023	192,059	189,548
Operating income	12,435	19,581	2,715	(19,142)	11,921	23,235	31,908	26,522	15,589	93,586	78,758
Interest expense	(4,154)	(4,172)	(4,194)	(1,843)	0	0	0	0	(14,363)	0	0
Interest income and other (expense) income, net	(282)	(1,071)	162	214	421	729	(117)	(440)	(977)	593	574
Income before taxes	7,999	14,338	(1,317)	(20,771)	12,342	23,964	31,791	26,082	249	94,179	79,332
(Benefit) provision for taxes	(5,119)	(2,252)	(11,339)	(22,980)	(46)	(3,015)	4,653	3,500	(41,690)	5,092	6,760
Net income	$ 13,118	$ 16,590	$ 10,022	$ 2,209	$ 12,388	$ 26,979	$ 27,138	$ 22,582	$ 41,939	$ 89,087	$ 72,572
Earnings per share:
Basic (in dollars per share)	$ 0.20	$ 0.25	$ 0.15	$ 0.03	$ 0.19	$ 0.41	$ 0.41	$ 0.35	$ 0.64	$ 1.37	$ 1.16
Diluted (in dollars per share)	$ 0.19	$ 0.25	$ 0.15	$ 0.03	$ 0.19	$ 0.40	$ 0.40	$ 0.34	$ 0.62	$ 1.32	$ 1.12
Weighted average number of shares used in computing earnings per share:
Basic (in shares)	66,371	65,996	65,587	65,282	64,856	65,440	65,547	64,552	65,809	65,099	62,339
Diluted (in shares)	67,984	67,465	67,165	67,233	66,776	67,314	68,186	67,123	67,472	67,350	64,523

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Reorganization Costs (Tables)

12 Months Ended

Jan. 27, 2013

Reorganizations [Abstract]

Schedule of summary of reorganization costs

The reorganization charges below were included in “Selling, general and administrative” on the consolidated statements of income for the respective periods.

(in thousands)	Severance and related costs
Balance at January 30, 2011	$	—
Reorganization charges	1,981
Cash payments	(1,965		)
Balance at January 29, 2012	16
Reorganization charges	13,387
Cash payments	(12,073		)
Balance at January 27, 2013	$	1,330

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Income Taxes - Components of Income Tax Expense (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Current tax provision
Federal	$ 7,100	$ 2,336	$ 3,178
State	784	569	444
Foreign	5,745	4,615	2,822
Subtotal	13,629	7,520	6,444
Deferred tax (benefit) provision
Federal	(15,812)	(4,417)	(1,631)
State	(148)	1,232	(5)
Foreign	(39,359)	757	1,952
Subtotal	(55,319)	(2,428)	316
(Benefit) provision for taxes	$ (41,690)	$ 5,092	$ 6,760

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Geographic Information and Concentration of Risk - Schedule of Significant Customers Accounting for at Least 10% of Net Sales (Details) (Net sales revenue)	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%
Minimum concentration risk threshold	10.00%
Samsung Electronics (and affiliates)
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	12.00%	13.00%	12.00%
Huawei Technologies (and affiliates)
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	10.00%	7.00%	8.00%
Frontek Technology Corp
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	6.00%	10.00%	11.00%

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Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock, at Cost	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Jan. 31, 2010	$ 405,741	$ 784	$ 348,741	$ 334,704	$ (279,306)	$ 818
Beginning balance (in shares) at Jan. 31, 2010	61,261,015	61,261,015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	72,572			72,572
Other comprehensive (loss)	(75)					(75)
Stock-based compensation	24,204		24,204
Repurchase of outstanding common stock	(2,819)				(2,819)
Repurchase of outstanding common stock (in shares)	(164,636)	(164,636)
Treasury stock reissued	30,689		(19,169)		49,858
Treasury stock reissued (in shares)	2,825,111	2,825,111
Shares issued under equity award plans	1	1
Shares issued under equity award plans	6,250	6,250
Tax shortfall from stock based compensation	(1,698)		(1,698)
Ending balance at Jan. 30, 2011	528,615	785	352,078	407,276	(232,267)	743
Ending balance (in shares) at Jan. 30, 2011	63,927,740	63,927,740
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	89,087			89,087
Other comprehensive (loss)	(208)					(208)
Stock-based compensation	19,068		19,068
Repurchase of outstanding common stock	(50,665)				(50,665)
Repurchase of outstanding common stock (in shares)	(2,279,526)	(2,279,526)
Treasury stock reissued	41,846		(15,264)		57,110
Treasury stock reissued (in shares)	3,316,566	3,316,566
Shares issued under equity award plans	0
Shares issued under equity award plans		0
Tax shortfall from stock based compensation	2,445		2,445
Ending balance at Jan. 29, 2012	630,188	785	358,327	496,363	(225,822)	535
Ending balance (in shares) at Jan. 29, 2012	64,964,780	64,964,780
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	41,939			41,939
Other comprehensive (loss)	(182)					(182)
Stock-based compensation	21,382		21,382
Repurchase of outstanding common stock	(7,769)				(7,769)
Repurchase of outstanding common stock (in shares)	(273,139)	(273,139)
Treasury stock reissued	12,803		(20,184)		32,987
Treasury stock reissued (in shares)	1,915,706	1,915,706
Shares issued under equity award plans	0
Shares issued under equity award plans		0
Tax shortfall from stock based compensation	(3,535)		(3,535)
Ending balance at Jan. 27, 2013	$ 694,826	$ 785	$ 355,990	$ 538,302	$ (200,604)	$ 353
Ending balance (in shares) at Jan. 27, 2013	66,607,347	66,607,347

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Interest Income and Other (Expense) Income, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 27, 2013	Oct. 28, 2012	Jul. 29, 2012	Apr. 29, 2012	Jan. 29, 2012	Oct. 30, 2011	Jul. 31, 2011	May 01, 2011	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Interest Income and Other Expense Disclosure [Abstract]
Interest income									$ 404	$ 1,213	$ 1,051
Non-recoverable VAT tax									(217)	(156)	(118)
Foreign currency transaction loss									(354)	(504)	(428)
Miscellaneous (expense) income									(810)	40	69
Interest income and other (expense), net	$ (282)	$ (1,071)	$ 162	$ 214	$ 421	$ 729	$ (117)	$ (440)	$ (977)	$ 593	$ 574

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Investments - Narrative (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Investment [Line Items]
Purchase of cost method investment	$ 2,500	$ 0	$ 0
Minimum
Investment [Line Items]
Investment maturity period	3 months
Temporary investments | Minimum
Investment [Line Items]
Investment maturity period	3 months
Temporary investments | Maximum
Investment [Line Items]
Investment maturity period	12 months
Long-term investments | Minimum
Investment [Line Items]
Investment maturity period	12 months
Long-term investments | Maximum
Investment [Line Items]
Investment maturity date	1/25/2015

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Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Jan. 27, 2013	Jan. 29, 2012
Components of Deferred Tax Assets and Liabilities [Abstract]
Total current deferred tax liability	$ (4,221)	$ (4,041)
Net deferred tax asset	34,773	298
Current Deferred Tax Asset [Member]
Components of Deferred Tax Assets and Liabilities [Abstract]
Deferred revenue	1,889	2,346
Inventory reserve	567	347
Payroll and related accruals	2,444	1,926
Bad debt reserve	323	359
Accrued service fees	626	405
Other deferred assets	2,593	508
Valuation allowance	(969)	(552)
Total current deferred tax asset	7,473	5,339
Noncurrent Deferred Tax Asset [Member]
Components of Deferred Tax Assets and Liabilities [Abstract]
Payroll and related accruals	5,389	4,497
Other deferred assets	3,395	772
Research and development charges	2,900	3,708
Research credit carryforward	49,257	11,967
Acquired NOL carryforward	28,595	16,489
Stock-based compensation	8,456	10,248
Valuation allowance	(7,351)	(5,065)
Total non-current deferred tax asset	90,641	42,616
Current Deferred Tax Liability [Member]
Components of Deferred Tax Assets and Liabilities [Abstract]
Inventory reserve - foreign	(1,618)	(2,115)
Bad debt reserve - foreign	(773)	(671)
Depreciation - foreign	(1,744)	(1,074)
Other deferred tax liability	(86)	(181)
Total current deferred tax liability	(4,221)	(4,041)
Noncurrent Deferred Tax Liability [Member]
Components of Deferred Tax Assets and Liabilities [Abstract]
Other deferred tax liability	(1,435)	(254)
Domestic tax on foreign earnings	0	(23,443)
Purchase accounting deferred tax liability	(49,181)	(14,159)
Depreciation and amortization	(8,504)	(5,760)
Total non-current deferred tax liability	$ (59,120)	$ (43,616)

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Inventories (Tables)

12 Months Ended

Jan. 27, 2013

Inventory Disclosure [Abstract]

Summary of inventories

Inventories, consisting of material, material overhead, labor, and manufacturing overhead, are stated at the lower of cost (first-in, first-out) or market and consist of the following:

(in thousands)	January 27, 2013		January 29, 2012
Raw materials	$	1,970	$	4,871
Work in progress	52,669		30,884
Finished goods	20,239		11,240
Inventories	$	74,878	$	46,995

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Fair Value Measurements - Financial Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis (Details) (USD $) In Thousands, unless otherwise specified	Jan. 27, 2013	Jan. 29, 2012
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Available-for-sale securities	$ 12,880	$ 100,643
Interest rate cap	544	0
Total financial assets	13,424	100,643
Level 2
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Available-for-sale securities	12,880	100,643
Interest rate cap	544	0
Total financial assets	13,424	100,643
Agency securities
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Available-for-sale securities	7,907	26,132
Agency securities | Level 2
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Available-for-sale securities	7,907	26,132
Corporate issues
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Available-for-sale securities	0	4,511
Corporate issues | Level 2
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Available-for-sale securities	0	4,511
Bank time deposits
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Available-for-sale securities	4,973	70,000
Bank time deposits | Level 2
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Available-for-sale securities	4,973	70,000
Interest rate cap | Level 2
Fair Value, Assets Measured On A Recurring Basis [Line Items]
Interest rate cap	$ 544	$ 0

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Income Taxes

12 Months Ended

Jan. 27, 2013

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The (benefit) provision for taxes consists of the following:

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Current tax provision
Federal	$	7,100		$	2,336		$	3,178
State	784			569			444
Foreign	5,745			4,615			2,822
Subtotal	13,629			7,520			6,444
Deferred tax (benefit) provision
Federal	(15,812		)	(4,417		)	(1,631		)
State	(148		)	1,232			(5		)
Foreign	(39,359		)	757			1,952
Subtotal	(55,319		)	(2,428		)	316
(Benefit) provision for taxes	$	(41,690	)	$	5,092		$	6,760

The (benefit) provision for taxes reconciles to the amount computed by applying the statutory federal rate to income before taxes as follows:

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Federal income tax at statutory rate	$	86		$	32,963		$	27,766
State income taxes, net of federal benefit	(2,472		)	(263		)	581
Foreign taxes at rates less than federal rates	(9,655		)	(16,269		)	(16,367		)
Tax credits generated	(5,328		)	(2,222		)	(1,234		)
Changes in valuation allowance	2,703			1,814			(879		)
Changes in uncertain tax positions	132			(3,235		)	2,755
Deemed dividends	1,101			1,250			1,056
Equity compensation	793			(1,312		)	1,639
Permanent differences	1,571			1,592			1,652
Sales exclusion - foreign jurisdiction	(10,689		)	(11,017		)	(9,429		)
Dividend and U.S. tax on foreign earnings	(23,443		)	—			—
Revaluation of deferred taxes assets and liabilities	3,510			—			—
Other	1			1,791			(780		)
(Benefit) provision for taxes	$	(41,690	)	$	5,092		$	6,760

During fiscal year 2013, the Company released $1.1 million of previously recorded reserves for uncertain tax positions as a result of statutes of limitations for the taxing authority to challenge the position expiring.

The deferred tax assets and deferred tax liabilities are classified in the consolidated balance sheets as follows:

(in thousands)	January 27, 2013			January 29, 2012
Deferred tax assets
Current	$	7,473		$	5,339
Non-current	33,563			—
Subtotal	41,036			5,339
Deferred tax liabilities
Current	(4,221		)	(4,041		)
Non-current	(2,042		)	(1,000		)
Subtotal	(6,263		)	(5,041		)
Net deferred tax assets	$	34,773		$	298

The Financial Accounting Standards Board’s (“FASB”) Accounting Standards Codification (“ASC”) Topic 740, Accounting for Income Taxes, requires that for a particular tax-paying component of an enterprise, and within a particular tax jurisdiction, (a) all current deferred tax liabilities and assets shall be offset and presented as a single amount and (b) all noncurrent deferred tax liabilities and assets shall be offset and presented as a single amount. Deferred tax liabilities and assets attributable to different tax-paying components of the enterprise or to different tax jurisdictions should not be offset.

The components of the net deferred income tax assets at January 27, 2013 and January 29, 2012 are as follows:

(in thousands)	January 27, 2013			January 29, 2012
Current deferred tax asset:
Deferred revenue	$	1,889		$	2,346
Inventory reserve	567			347
Payroll and related accruals	2,444			1,926
Bad debt reserve	323			359
Accrued service fees	626			405
Other deferred assets	2,593			508
Valuation allowance	(969		)	(552		)
Total current deferred tax asset	7,473			5,339
Non-current deferred tax asset:
Research and development charges	2,900			3,708
Research credit carryforward	49,257			11,967
Acquired NOL carryforward	28,595			16,489
Payroll and related accruals	5,389			4,497
Stock-based compensation	8,456			10,248
Other deferred assets	3,395			772
Valuation allowance	(7,351		)	(5,065		)
Total non-current deferred tax asset	90,641			42,616
Current deferred tax liability:
Inventory reserve - foreign	(1,618		)	(2,115		)
Bad debt reserve - foreign	(773		)	(671		)
Depreciation - foreign	(1,744		)	(1,074		)
Other current deferred tax liability	(86		)	(181		)
Total current deferred tax liability	(4,221		)	(4,041		)
Non-current deferred tax liability:
Domestic tax on foreign earnings	—			(23,443		)
Purchase accounting deferred tax liability	(49,181		)	(14,159		)
Depreciation and amortization	(8,504		)	(5,760		)
Other non-current deferred tax liability	(1,435		)	(254		)
Total non-current deferred tax liability	(59,120		)	(43,616		)
Net deferred tax asset	$	34,773		$	298

The change in the net deferred tax asset differs from the deferred tax provision as a result of deferred tax assets that do not typically impact the provision. This includes the benefit related to tax deductions from the exercise of non-qualified stock options in excess of compensation cost recognized for financial reporting purposes (recorded as an increase to additional paid-in capital when realized).

As of January 27, 2013, the Company had federal and state net operating loss carryforwards of $73.7 million and $86.3 million, respectively, which, subject to certain limitations, are available to offset future taxable income through fiscal year 2032. A portion of these losses were generated by SMI prior to the Company’s purchase of SMI and therefore are subject to change of control provisions which limit the amount of acquired tax attributes that can be utilized in a given tax year. The Company does not expect these changes in control limitations to significantly impact its ability to utilize these attributes.

Included in the Company’s net operating loss carryforward deferred tax asset is approximately $8.3 million of deferred tax assets attributable to excess equity deductions related to stock awards that may not be included on the Company’s consolidated balance sheet. Due to a provision within ASC 740, concerning when tax benefits related to excess stock option deductions can be credited to paid-in capital, the portion of the Company’s deferred tax asset related to such excess tax benefits must be excluded from the deferred tax asset balance, even if the facts and circumstances indicate that it is more likely than not that the deferred tax asset can be realized. The deferred tax asset and the related credit to paid-in capital will only be included as the related deferred tax asset is applied to reduce taxes payable.

As of January 27, 2013, the Company had gross federal and state research credits available of approximately $6.0 million and $12.3 million, respectively, which are available to offset taxable income. These credits will expire between fiscal years 2022 through 2033. As of January 27, 2013, the Company had federal Alternative Minimum Tax credits available of approximately $1.3 million. The Company also had Canadian research credits available of approximately $34.7 million. These credits will expire between fiscal years 2025 and 2033.

The Company has established valuation allowances against certain U.S. state and foreign deferred tax assets to reflect its concerns regarding the ability of the Company to generate sufficient taxable income to utilize these attributes. The following table summarizes the changes in these allowances during fiscal years 2013, 2012 and 2011:

	Fiscal Year Ended
(in thousands)	January 27, 2013		January 29, 2012		January 30, 2011
Beginning balance	$	5,617	$	5,053	$	6,502
Additions	2,703		564		2,767
Releases	—		—		(4,216		)
Ending balance	$	8,320	$	5,617	$	5,053

Realization of the net deferred tax assets is dependent on generating sufficient taxable income during the periods in which temporary differences will reverse. Although realization is not assured, management believes it is more likely than not that the remaining net deferred tax assets will be realized. The amount of the net deferred tax assets considered realizable, however, could be adjusted in the near term if estimates of future taxable income during the reversal periods are revised.

As of January 27, 2013, the Company had approximately $383.7 million of unremitted earnings related to the Company’s wholly owned foreign subsidiaries.

In the fourth quarter of fiscal year 2010, in connection with the SMI acquisition, the Company modified its previous assertion that all of its earnings were permanently reinvested offshore and concluded that $120.0 million of foreign earnings were not permanently reinvested offshore. Of this amount, $50.0 million was actually repatriated to the U.S., leaving $70.0 million of unrepatriated foreign subsidiary earnings.

In the first quarter of fiscal year 2013, in connection with the acquisition of Gennum, the Company reviewed its assertion regarding the amount of foreign subsidiary earnings that were considered to be permanently reinvested offshore and concluded that due to post-acquisition foreign operating cash needs, all of its foreign subsidiary earnings, including the aforementioned $70.0 million, are considered to be permanently reinvested offshore. This change in assertion resulted in the recognition of a one-time tax benefit of $23.4 million in the first quarter of fiscal year 2013.

Uncertain Tax Positions

The Company uses a two-step approach to recognize and measure uncertain tax positions (“UTP”). The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon ultimate settlement.

A reconciliation of the beginning and ending amount of gross unrecognized tax benefits (before federal impact of state items) is as follows:

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Beginning balance	$	13,759		$	17,011		$	13,795
Additions based on tax positions related to the current year	695			835			449
Additions for tax positions of prior years	—			—			3,592
Reductions for tax positions of prior years	(647		)	(4,087		)	—
Reductions for settlements with tax authorities	(663		)	—			(825		)
Ending balance	$	13,144		$	13,759		$	17,011

Reductions recorded in the current year related to a release of previously recorded reserves for uncertain tax positions as a result of statutes of limitations for the taxing authority to challenge the position expiring and effective settlement of the position through examination.

Included in the balance of unrecognized tax benefits at January 27, 2013 and January 29, 2012, are $11.1 million and $11.6 million, respectively, of net tax benefits (after federal impact of state items) that, if recognized, would impact the effective tax rate.

The liability for uncertain tax positions is reflected on the consolidated balance sheets as follows:

	Fiscal Year Ended
(in thousands)	January 27, 2013		January 29, 2012
Accrued liabilities	$	188	$	437
Other long-term liabilities	10,887		11,159
Total accrued taxes	$	11,075	$	11,596

The Company’s policy is to include net interest and penalties related to unrecognized tax benefits within the provision for taxes on the consolidated statements of income. During fiscal years 2013 and 2012, a net increase of $50,000 and $50,000 of interest and penalties was recognized in the consolidated statement of income, respectively. The Company had approximately $293,000 and $243,000 of net interest and penalties accrued at January 27, 2013 and January 29, 2012, respectively.

In the second quarter of fiscal year 2013, the overall statutory tax rate in Canada increased as a result of newly enacted tax legislation. The impact of this tax law change resulted in a $3.4 million discrete charge to the Canadian tax provision and a corresponding adjustment to the Company’s deferred tax liabilities.

As of January 27, 2013, it was reasonably possible that the total amounts of unrecognized tax benefits would decrease by up to $0.2 million within twelve months as a result of statutes of limitations for the taxing authority to challenge the position expiring. If recognized, this decrease will impact the effective tax rate.

Tax years prior to 2009 (the Company’s fiscal year 2010) are generally not subject to examination by the Internal Revenue Service (“IRS”) except for items involving tax attributes that have been carried forward to tax years whose statute of limitations remains open. The Company is currently under IRS audit for fiscal year 2010 and fiscal year 2011. For state returns, the Company is generally not subject to income tax examinations for years prior to 2008 (the Company’s fiscal year 2009). The Company has a primary significant tax presence in Switzerland for which Swiss tax filings have been examined through fiscal year 2010. The Company is also subject to routine examinations by various foreign tax jurisdictions in which it operates.

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Property, Plant and Equipment (Tables)

12 Months Ended

Jan. 27, 2013

Property, Plant and Equipment [Abstract]

Schedule of property, plant and equipment

The following is a summary of property and equipment, at cost less accumulated depreciation:

(in thousands)	January 27, 2013			January 29, 2012
Property	$	9,050		$	5,991
Buildings	18,627			18,580
Leasehold improvements	8,881			5,768
Machinery and equipment	130,595			98,895
Furniture and office equipment	30,120			23,428
Construction in progress	6,330			2,444
Property, plant and equipment, gross	203,603			155,106
Less accumulated depreciation and amortization	(101,766		)	(85,393		)
Property, plant and equipment, net	$	101,837		$	69,713

Schedule of depreciation on property plant and equipment

The following table summarizes depreciation and amortization expense for property, plant and equipment:

	Fiscal Year Ended
(in thousands)	January 27, 2013		January 29, 2012		January 30, 2011
Depreciation and amortization expense	$	17,915	$	9,908	$	6,928

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Income Taxes - Net Deferred Tax Assets and Deferred Tax Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Jan. 27, 2013	Jan. 29, 2012
Deferred tax assets
Current	$ 7,473	$ 5,339
Non-current	33,563	0
Subtotal	41,036	5,339
Deferred tax liabilities
Current	(4,221)	(4,041)
Non-current	(2,042)	(1,000)
Subtotal	(6,263)	(5,041)
Net deferred tax asset	$ 34,773	$ 298

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Geographic Information and Concentration of Risk

12 Months Ended

Jan. 27, 2013

Risks and Uncertainties [Abstract]

Geographic Information and Concentration of Risk

Geographic Information and Concentration of Risk

The Company operates exclusively in the semiconductor industry and primarily within the analog and mixed-signal sector.

The table below provides net sales activity by product line on a comparative basis for all periods. As a result of the acquisition of Gennum and Cycleo (see Note 3) in March 2012, the Company formed a separate Gennum product line while Cycleo is part of the Wireless and Sensing product line.

	Fiscal Year Ended
(in thousands, except percentages)	January 27, 2013				January 29, 2012				January 30, 2011
Advanced Communications	$	133,533	23	%	$	139,695	29	%	$	112,019	25	%
Wireless and Sensing	50,444		9	%	57,124		12	%	59,107		13	%
Power Management and High Reliability	66,427		12	%	74,056		15	%	87,693		19	%
Protection	198,866		34	%	209,726		44	%	195,683		43	%
Gennum	129,557		22	%	—		—	%	—		—	%
Total net sales	$	578,827	100	%	$	480,601	100	%	$	454,502	100	%

Net sales activity by geographic region is as follows:

	Fiscal Year Ended
(in thousands, except percentages)	January 27, 2013				January 29, 2012				January 30, 2011
North America	$	98,401	17	%	$	114,552	24	%	$	112,404	25	%
Asia-Pacific	405,179		70	%	298,477		62	%	272,079		60	%
Europe	75,247		13	%	67,572		14	%	70,019		15	%
Total net sales	$	578,827	100	%	$	480,601	100	%	$	454,502	100	%

The Company generally attributes sales to a country based on the ship-to address. The table below summarizes sales activity to countries that represented greater than 10% of total net sales for at least one of the periods indicated:

	Fiscal Year Ended
(percentage of total sales)	January 27, 2013		January 29, 2012		January 30, 2011
United States	17	%	20	%	23	%
China (including Hong Kong)	35	%	38	%	34	%
Japan	10	%	8	%	7	%
South Korea	7	%	8	%	10	%
Total net sales	69	%	74	%	74	%

The Company’s regional income (loss) from continuing operations before income taxes is as follows:

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Domestic	$	(19,867	)	$	(3,070	)	$	(12,540	)
Foreign	20,116			97,249			91,872
Total	$	249		$	94,179		$	79,332

Domestic (loss) from continuing operations includes amortization of acquired intangible assets, litigation related expenses and higher levels of stock-based compensation compared to foreign operations.

Long-lived Assets

Long-lived assets which consist of property, plant and equipment, net of accumulated depreciation are summarized as follows:

(in thousands)	January 27, 2013		January 29, 2012
Located within the United States	$	53,858	$	47,612
Located outside the United States	47,979		22,101
	$	101,837	$	69,713

Some of these assets are at locations owned or operated by the Company’s suppliers. The Company has consigned certain equipment to a foundry based in China to support its specialized processes run at the foundry. The Company has also installed its own equipment at some of its packaging and testing subcontractors in order to ensure a certain level of capacity, assuming the subcontractor has ample employees to operate the equipment.

The amount of equipment and machinery consigned to a foundry in China was $7.9 million and $9.4 million as of January 27, 2013 and January 29, 2012, respectively.

Significant Customers

Sales to the Company’s customers are generally made on open account, subject to credit limits the Company may impose, and the receivables are subject to the risk of being uncollectible.

Each of the following significant customers accounted for at least 10% of net sales for at least one of the periods indicated:

	Fiscal Year Ended
(percentage of net sales)	January 27, 2013		January 29, 2012		January 30, 2011
Samsung Electronics (and affiliates)	12	%	13	%	12	%
Huawei Technologies (and affiliates)	10	%	7	%	8	%
Frontek Technology Corp	6	%	10	%	11	%

The following table shows the list of customers that have an outstanding receivable balance that represents at least 10% of total net receivables for at least one of the periods indicated:

	Balance as of
(percentage of net accounts receivable)	January 27, 2013		January 29, 2012
Huawei Technologies (and affiliates)	14	%	11	%
Samsung Electronics (and affiliates)	12	%	14	%
Frontek Technology Corp	4	%	10	%
Dragon Technology	3	%	11	%

Outside Subcontractors and Suppliers

The Company relies on a limited number of outside subcontractors and suppliers for the production of silicon wafers, packaging and certain other tasks. Disruption or termination of supply sources or subcontractors, due to natural disasters such as an earthquake or other causes, could delay shipments and could have a material adverse effect on the Company. Although there are generally alternate sources for these materials and services, qualification of the alternate sources could cause delays sufficient to have a material adverse effect on the Company. Several of the Company’s outside subcontractors and suppliers, including third-party foundries that supply silicon wafers, are located in foreign countries, including China, Taiwan, Canada, Europe and Israel. The Company’s largest source of silicon wafers is an outside foundry located in China and a significant amount of the Company’s assembly and test operations are conducted by third-party contractors in China, Malaysia, Korea and the Philippines.

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Property, Plant and Equipment - Narrative (Details) (Foundry in China, USD $) In Millions, unless otherwise specified	Jan. 27, 2013	Jan. 29, 2012
Foundry in China
Property, Plant and Equipment [Line Items]
Consigned property, plant and equipment	$ 7.9	$ 9.4

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Geographic Information and Concentration of Risk - Net Sales Activity by Product Line (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 27, 2013	Oct. 28, 2012	Jul. 29, 2012	Apr. 29, 2012	Jan. 29, 2012	Oct. 30, 2011	Jul. 31, 2011	May 01, 2011	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Product Information [Line Items]
Net sales	$ 150,603	$ 160,878	$ 150,704	$ 116,642	$ 104,032	$ 123,944	$ 130,254	$ 122,371	$ 578,827	$ 480,601	$ 454,502
Advanced Communications
Product Information [Line Items]
Net sales									133,533	139,695	112,019
Concentration risk, percentage									23.00%	29.00%	25.00%
Wireless and Sensing
Product Information [Line Items]
Net sales									50,444	57,124	59,107
Concentration risk, percentage									9.00%	12.00%	13.00%
Power Management and High Reliability
Product Information [Line Items]
Net sales									66,427	74,056	87,693
Concentration risk, percentage									12.00%	15.00%	19.00%
Protection
Product Information [Line Items]
Net sales									198,866	209,726	195,683
Concentration risk, percentage									34.00%	44.00%	43.00%
Gennum
Product Information [Line Items]
Net sales									$ 129,557	$ 0	$ 0
Concentration risk, percentage									22.00%	0.00%	0.00%

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Consolidated Statements of Stockholders' Equity (Parenthetical)	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011	Jan. 31, 2010
Common stock, shares outstanding	66,607,347	64,964,780	63,927,740	61,261,015
Treasury stock reissued (in shares)	1,915,706	3,316,566	2,825,111
Shares issued under equity award plans			6,250
Common Stock
Common stock, shares outstanding	66,607,347	64,964,780	63,927,740	61,261,015
Treasury stock reissued (in shares)	1,915,706	3,316,566	2,825,111
Shares issued under equity award plans	0	0	6,250

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Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Net income	$ 41,939	$ 89,087	$ 72,572
Other comprehensive (loss) income, before tax:
Change in net unrealized holding loss on available-for-sale investments	(42)	(262)	(117)
Change in unrealized loss on interest rate cap	(556)	0	0
Change in cumulative translation adjustment	203	(4)	1
Other comprehensive loss, before tax	(395)	(266)	(116)
Benefit for taxes related to items of other comprehensive (loss) income	213	58	41
Other comprehensive loss, net of tax	(182)	(208)	(75)
Total comprehensive income, net of tax	$ 41,757	$ 88,879	$ 72,497

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Accrued Liabilities

12 Months Ended

Jan. 27, 2013

Payables and Accruals [Abstract]

Accrued Liabilities

Accrued Liabilities

The following is a summary of accrued liabilities for fiscal years 2013 and 2012:

(in thousands)	January 27, 2013		January 29, 2012
Compensation	$	23,140	$	14,330
Equity awards accounted for as a liability	3,241		3,988
Deferred compensation	1,410		901
Accrued sales and marketing expenses	3,202		1,742
Accrued professional fees	3,835		1,949
Accrued interest expense	1,177		—
Income taxes payable	4,113		4,260
Accrued taxes	266		437
Other	8,892		4,782
	$	49,276	$	32,389

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Commitments and Contingencies - Narrative (Details) (USD $)	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011	Jan. 25, 2015	Jan. 26, 2014
Commitments And Contingencies [Line Items]
Rent expense	$ 7,900,000	$ 4,400,000	$ 4,400,000
Sublease income	133,000	0	158,000
Vendor commitments				300,000	1,200,000
Lease duration	40 years
Range of possible loss, minimum	2,500,000
Range of possible loss, maximum	5,700,000
Environmental reserve accrual	2,500,000
Maximum potential payment under earn-out arrangement	16,000,000
Earn-out period (years)	4
Cash surrender value of life insurance	10,000,000	10,200,000
Canada
Commitments And Contingencies [Line Items]
Employer contribution to defined contribution plan	1,500,000
United States
Commitments And Contingencies [Line Items]
Employer contribution to retirement plan	1,200,000	1,200,000	1,000,000
CSEM Pension Fund
Commitments And Contingencies [Line Items]
Employer contribution to retirement plan	800,000	800,000	800,000
Cycleo Earn-out Arrangement [Member]
Commitments And Contingencies [Line Items]
Requisite service period for certain Cycleo stockholders (years)	4
Compensation expense related to deferred compensation liability	$ 1,800,000

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Stock-Based Compensation - Summary of the Activity for Non-Employee Directors Stock Unit Awards (Details) (Non-employee director stock unit awards, USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011	Jan. 31, 2010
Non-employee director stock unit awards
Number of Units
Beginning balance (in shares)	18	30	35
Stock units granted (in shares)	20	18	30
Stock units vested (in shares)	(18)	(30)	(35)
Stock units forfeited (in shares)	0	0	0
Ending balance (in shares)	20	18	30	35
Recorded Liability
Beginning balance	$ 3,873	$ 2,414	$ 1,389
Change in liability	684	1,459	1,025
Ending balance	4,557	3,873	2,414	1,389
Weighted Averaged Grant Date Fair Value (per unit)
Beginning balance (in dollars per share)	$ 27.60	$ 16.43	$ 16.18
Stock units granted (in dollars per share)	$ 24.46	$ 27.60	$ 16.43
Stock units vested (in dollars per share)	$ 27.60	$ 16.43	$ 16.18
Ending balance (in dollars per share)	$ 24.46	$ 27.60	$ 16.43	$ 16.18
Aggregate Unrecognized Compensation
Beginning balance	216	269	232
Ending balance	$ 253	$ 216	$ 269	$ 232
Period Over Which Expected to be Recognized (in years)
Ending Balance	0 years 4 months 24 days	0 years 4 months 24 days	0 years 4 months 24 days	0 years 4 months 24 days

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Stock-Based Compensation - Summary of the Activity for Performance Unit Awards (Details) (Performance unit awards, USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011	Jan. 31, 2010
Units
Beginning balance (in shares)	360	556	593
Performance units granted (in shares)	144	117	143
Performance units vested (in shares)	(144)	(218)	0
Performance units cancelled/forfeited (in shares)	(7)	(95)	(180)
Ending balance (in shares)	353	360	556	593
Weighted Average Grant Date Fair Value (per share)
Beginning balance (in dollars per share)	$ 16.65	$ 14.26	$ 14.29
Performance units granted (in dollars per share)	$ 29.30	$ 23.33	$ 16.68
Performance units vested (in dollars per share)	$ 11.92	$ 14.74	$ 0.00
Performance units forfeited (in dollars per share)	$ 29.35	$ 15.26	$ 16.28
Ending balance (in dollars per share)	$ 23.50	$ 16.65	$ 14.26	$ 14.29
Aggregate Unrecognized Compensation
Beginning balance	$ 4,829	$ 7,971	$ 580
Ending balance	4,754	4,829	7,971	580
Weighted Average Period Over Which Expected to be Recognized (in years)
Ending Balance	1 year 1 month 6 days	1 year	1 year	1 year 3 months 18 days
Subject to Share Settlement
Units
Beginning balance (in shares)	180	326	363
Performance units granted (in shares)	77	59	72
Performance units vested (in shares)	(72)	(157)	0
Performance units cancelled/forfeited (in shares)	(4)	(48)	(109)
Ending balance (in shares)	181	180	326
Subject to Cash Settlement
Units
Beginning balance (in shares)	180	230	230
Performance units granted (in shares)	67	58	71
Performance units vested (in shares)	(72)	(61)	0
Performance units cancelled/forfeited (in shares)	(3)	(47)	(71)
Ending balance (in shares)	172	180	230
Recorded Liability
Beginning balance	6,034	3,925	259
Performance units vested	(4,172)	(1,335)	0
Change in liability	2,560	3,444	3,666
Ending balance	$ 4,422	$ 6,034	$ 3,925

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Schedule II - Valuation And Qualifying Accounts (Details) (Allowance for doubtful accounts, USD $)	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Allowance for doubtful accounts
Change in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 552,875	$ 1,108,221	$ 1,302,000
Charged (Reversal) to Costs and Expenses	40,820	332,154	53,924
Deductions	0	(887,500)	(247,703)
Balance at End of Year	$ 593,695	$ 552,875	$ 1,108,221

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Document And Entity Information (USD $) In Billions, except Share data, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Mar. 22, 2013	Jul. 29, 2012
Entity Information [Line Items]
Document Type	10-K
Document Period End Date	Jan. 27, 2013
Amendment Flag	false
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	FY
Entity Registrant Name	SEMTECH CORP
Entity Central Index Key	0000088941
Current Fiscal Year End Date	--01-27
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		67,090,054
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Well-known Seasoned Issuer	Yes
Entity Public Float			$ 1.37

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Credit Facilities

12 Months Ended

Jan. 27, 2013

Debt Instruments [Abstract]

Credit Facilities

Credit Facilities

On March 20, 2012, the Company entered into a credit agreement with certain lenders (the “Lenders”) and Jefferies Finance LLC, as administrative and collateral agent (the “Credit Agreement”). Pursuant to the Credit Agreement, the Lenders provided the Company with senior secured first lien credit facilities in an aggregate principal amount of $350 million (the “Facilities”), consisting of term A loans in an aggregate principal amount of $100 million (the “Term A Loans”) and term B loans in an aggregate principal amount of $250 million (the “Term B Loans”). Both the Term A Loans and the Term B Loans mature on March 20, 2017. The initial carrying amounts totaled $99.5 million (net of original issue discount of $500,000) for the Term A Loans and $247.5 million (net of original issue discount of $2.5 million) for the Term B Loans. The respective amounts of original issue discount are being amortized using the effective interest method and are included in “Interest expense” in the consolidated statements of income. A portion of the proceeds of the loans was used to finance the acquisition of Gennum and fees, costs and expenses related thereto, and the remainder of the proceeds may be used by Semtech for working capital and general corporate purposes.

Debt issuance costs incurred in connection with the Facilities totaled $8.9 million and are being amortized using the effective interest method over the terms of the loans, and are included in “Interest expense” in the consolidated statements of income.

The Company may request, at any time, subject to certain conditions, the establishment of one or more additional term loan facilities in an aggregate principal amount not to exceed $150 million, the proceeds of which may be used for working capital and general corporate purposes.

Interest on the Term A Loans and Term B Loans accrue at certain reference rates plus specified applicable margins. The reference rates are equivalent to, at the Company’s option, either: (i) LIBOR for interest periods of 1, 2, 3 or 6 months or, subject to certain conditions, 9 or 12 months (“LIBOR”) or (ii) the highest of (a) the prime rate, (b) the federal funds effective rate plus 1/2% or (c) one-month LIBOR plus 1.00% (“Base Rate”). For the Term B Loans, LIBOR is subject to a floor of 1.00% and Base Rate is subject to a floor of 2.00%. For the Term A Loans, the applicable margin for LIBOR loans ranges from 2.50% to 2.75% and the applicable margin for Base Rate loans ranges from 1.50% to 1.75%, in each case depending upon the total leverage ratio. For the Term B Loans, the applicable margin for LIBOR loans is 3.25% and the applicable margin for Base Rate loans is 2.25%. Interest is payable at least quarterly. As of January 27, 2013, the interest rates payable on the Term A Loans and Term B Loans were 2.96% and 4.25%, respectively.

In accordance with the Credit Agreement, and as described in Note 11, in June 2012, the Company entered into an interest rate hedging agreement protecting at least 50% of the variable interest rate exposure on the term loans.

Quarterly principal payments of $5.0 million and $0.6 million for the Term A Loans and Term B Loans, respectively, are due beginning on the last business day of the quarter ended July 29, 2012, with the final remaining payments due on the maturity date of March 20, 2017.

Scheduled maturities of current and long-term debt are as follows:

(in thousands)
Fiscal Year Ending:
2014	$	49,100
2015	22,500
2016	22,500
2017	22,500
2018	216,525
Total debt	$	333,125

Pursuant to the Credit Agreement, under certain circumstances, the Company is obligated to apply 50% of its excess cash flow (as defined in the Credit Agreement) for each fiscal year, as well as net cash proceeds from specified other sources, such as asset sales, debt issuances or insurance proceeds, to prepay the Term A Loans and Term B Loans. Excess cash flow may be primarily summarized as cash provided by operating activities less capital expenditures and loan principal payments. The first excess cash flow payment is estimated to be $26.6 million. The earliest date that any such payment may be due is 95 days after the last day of the fiscal year ending closest to January 31, 2013. The Company has classified the potential early payment of $26.6 million from “Long term debt” to “Current portion - long term debt” in the consolidated balance sheets as of January 27, 2013.

Subject to certain customary exceptions, all obligations of the Company under the Facilities are unconditionally guaranteed by each of Semtech’s existing and subsequently acquired or organized direct and indirect domestic subsidiaries (the “Guarantors”). The obligations of Semtech and the Guarantors in respect of the Facilities are secured by a first priority security interest in substantially all of the assets of Semtech and the Guarantors, subject to certain customary exceptions.

The Facilities are subject to customary affirmative and negative covenants, some of which require the maintenance of specified interest coverage and leverage ratios. The Company was subject to a minimum interest ratio of 5.00:1.00 for the fourth quarter ended January 27, 2013 and a maximum total leverage ratio of 2.65:1.00 as of the last day of the fourth quarter ended January 27, 2013. The Company was in compliance with such financial covenants as of January 27, 2013.

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Credit Facilities - Narrative (Details) (USD $)	0 Months Ended		0 Months Ended		0 Months Ended		12 Months Ended
	Mar. 20, 2012	May 02, 2013	Mar. 20, 2012 Term A loans	Jan. 27, 2013 Term A loans	Mar. 20, 2012 Term B loans	Jan. 27, 2013 Term B loans	Jan. 27, 2013 Minimum	Jan. 27, 2013 Maximum	Mar. 20, 2012 Maximum Additional term loan facilities	Mar. 20, 2012 Federal funds	Mar. 20, 2012 LIBOR	Jan. 27, 2013 LIBOR Term B loans	Mar. 20, 2012 LIBOR Term B loans	Mar. 20, 2012 LIBOR Minimum Term A loans	Mar. 20, 2012 LIBOR Maximum Term A loans	Jan. 27, 2013 Base rate Term B loans	Mar. 20, 2012 Base rate Term B loans	Mar. 20, 2012 Base rate Minimum Term A loans	Mar. 20, 2012 Base rate Maximum Term A loans
Debt instrument, face amount	$ 350,000,000		$ 100,000,000		$ 250,000,000				$ 150,000,000
Long-term debt (net of original issuance discount)			99,500,000		247,500,000
Original issue discount on debt			500,000		2,500,000
Debt issuance cost	8,900,000
Description of variable rate basis	(i) LIBOR for interest periods of 1, 2, 3 or 6 months or, subject to certain conditions, 9 or 12 months (“LIBOR”) or (ii) the highest of (a) the prime rate, (b) the federal funds effective rate plus 1/2% and (c) one-month LIBOR plus 1.00% ("Base Rate")
Basis spread on variable rate										0.50%	1.00%	3.25%		2.50%	2.75%	2.25%		1.50%	1.75%
Basis spread on variable rate floor													1.00%				2.00%
Interest rate at period end				2.96%		4.25%
Minimum percentage of debt protected by hedging agreement	50.00%
Periodic principal payment			5,000,000		600,000
Percent of excess cash flow	50.00%
Potential early debt payment, first excess cash flow payment		$ 26,600,000
Period after last day of fiscal year 2013 to make earliest payment	95 days
Interest coverage ratio							5.00
Total leverage ratio								2.65

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Stock-Based Compensation - Summary of the Activity for Restricted Stock Awards (Details) (Restricted stock, USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 27, 2013		Jan. 29, 2012		Jan. 30, 2011		Jan. 31, 2010
Restricted stock
Number of Shares
Beginning balance (in shares)	32		135		418
Restricted stocks granted (in shares)	0		0		0
Restricted stocks vested (in shares)	(32)		(91)		(270)
Restricted stocks cancelled (in shares)	0		(12)		(13)
Ending balance (in shares)	0		32		135		418
Weighted Average Grant Date Fair Value (per share)
Beginning balance (in dollars per share)	$ 14.57		$ 14.44		$ 15.15
Restricted stocks vested (in dollars per share)	$ 14.57		$ 14.29		$ 17.33
Restricted stocks cancelled (in dollars per share)			$ 15.25		$ 17.44
Ending balance (in dollars per share)	$ 0.00		$ 14.57		$ 14.44		$ 15.15
Aggregate Intrinsic Value
Restricted stocks vested	$ 902	[1]	$ 2,201	[1]	$ 4,678	[1]
Aggregate Unrecognized Compensation
Beginning balance	81		984		3,193
Ending balance	$ 0		$ 81		$ 984		$ 3,193
Weighted Average Period Over Which Expected to be Recognized (in years)
Ending Balance	0 years		0 years 1 month 6 days		0 years 9 months 18 days		1 year 2 months 12 days

[1] Represents the value of Semtech stock on the date that the restricted stock vested.

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Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jan. 27, 2013	Jan. 29, 2012
Current assets:
Cash and cash equivalents	$ 223,192	$ 227,022
Temporary investments	4,973	83,121
Accounts receivable, less allowances of $4,917 at January 27, 2013 and $3,594 at January 29, 2012	69,160	49,644
Inventories	74,878	46,995
Deferred tax assets	7,473	5,339
Prepaid taxes	7,794	9,580
Other current assets	18,523	5,611
Total current assets	405,993	427,312
Non-current assets:
Property, plant and equipment, net of accumulated depreciation of $101,766 at January 27, 2013 and $85,393 at January 29, 2012	101,837	69,713
Long-term investments	7,907	17,522
Deferred income taxes	33,563	0
Goodwill	393,584	129,651
Other intangible assets, net	206,058	66,720
Other assets	22,071	15,403
TOTAL ASSETS	1,171,013	726,321
Current liabilities:
Accounts payable	51,991	26,699
Accrued liabilities	49,276	32,389
Deferred revenue	3,745	3,853
Current portion - long term debt	48,449	0
Deferred tax liabilities	4,221	4,041
Total current liabilities	157,682	66,982
Non-current liabilities:
Deferred tax liabilities	2,042	1,000
Long term debt, less current	282,286	0
Other long-term liabilities	34,177	28,151
Stockholders’ equity:
Common stock, $0.01 par value, 250,000,000 shares authorized, 78,136,144 issued and 66,607,347 outstanding on January 27, 2013 and 78,136,144 issued and 64,964,780 outstanding on January 29, 2012	785	785
Treasury stock, at cost, 11,528,797 shares as of January 27, 2013 and 13,171,364 shares as of January 29, 2012	(200,604)	(225,822)
Additional paid-in capital	355,990	358,327
Retained earnings	538,302	496,363
Accumulated other comprehensive income	353	535
Total stockholders’ equity	694,826	630,188
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,171,013	$ 726,321

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Investments

12 Months Ended

Jan. 27, 2013

Investments [Abstract]

Investments

Investments

Investments that have original maturities of three months or less are accounted for as cash equivalents. This includes money market funds, time deposits and U.S. government obligations. Temporary and long-term investments consist of government, bank and corporate obligations, and bank time deposits with original maturity dates in excess of three months. Temporary investments have original maturities in excess of three months, but mature within twelve months of the balance sheet date. Long-term investments have original maturities in excess of twelve months. The Company determines the cost of securities sold based on the specific identification method. Realized gains or losses are reported in “Interest income and other expense, net” on the consolidated statements of income.

The Company classifies its investments as “available for sale” because it may sell some securities prior to maturity. The Company’s investments are subject to market risk, primarily interest rate and credit risks. The Company’s investments are managed by a limited number of outside professional managers that operate within investment guidelines set by the Company. These guidelines include specified permissible investments, minimum credit quality ratings and maximum average duration restrictions and are intended to limit market risk by restricting the Company’s investments to high quality debt instruments with relatively short-term maturities.

As of January 27, 2013, all of the Company’s long-term investments mature on various dates through fiscal year 2015.

The following table summarizes the Company’s available for sale investments:

	January 27, 2013						January 29, 2012
(in thousands)	Market Value		Adjusted Cost		Gross Unrealized Gain		Market Value		Adjusted Cost		Gross Unrealized Gain
Agency securities	$	7,907	$	7,900	$	7	$	26,132	$	26,110	$	22
Corporate issues	—		—		—		4,511		4,484		27
Bank time deposits	4,973		4,973		—		70,000		70,000		—
Total investments	$	12,880	$	12,873	$	7	$	100,643	$	100,594	$	49

Agency securities are specific securities that are issued by United States government agencies such as Ginnie Mae, Fannie Mae, Freddie Mac or the Federal Home Loan Banks. Due to the expectation of federal backing, these securities usually hold the highest credit rating possible.

The following table summarizes the maturities of the Company’s available for sale investments:

	January 27, 2013				January 29, 2012
(in thousands)	Market Value		Adjusted Cost		Market Value		Adjusted Cost
Within 1 year	$	4,973	$	4,973	$	83,121	$	83,085
After 1 year through 5 years	7,907		7,900		17,522		17,509
Total investments	$	12,880	$	12,873	$	100,643	$	100,594

Unrealized gains and losses are the result of fluctuations in the market value of the Company’s available for sale investments and are included in “Accumulated other comprehensive income” on the consolidated balance sheets. The following table summarizes net unrealized losses arising in the periods presented in addition to the tax associated with these comprehensive income items:

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Unrealized loss, net of tax	$	(32	)	$	(204	)	$	(76	)
Decrease to deferred tax liability	$	(10	)	$	(58	)	$	(41	)

The following table summarizes interest income generated from investments and cash and cash equivalents:

	Fiscal Year Ended
(in thousands)	January 27, 2013		January 29, 2012		January 30, 2011
Interest income	$	404	$	1,213	$	1,051

During fiscal year 2013, the Company acquired an investment in a privately traded company for total cash consideration of $2.5 million. The Company accounts for the investment in equity interests under the cost method of accounting since it does not have the ability to exercise significant influence over the investee. The investment in equity interests is included in “Other assets” on the consolidated balance sheet as of January 27, 2013.

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Acquisitions

12 Months Ended

Jan. 27, 2013

Business Combinations [Abstract]

Acquisitions

Acquisitions

Gennum Corporation (“Gennum”)

On March 20, 2012, the Company, through its wholly-owned subsidiary Semtech Canada Inc., completed the acquisition of all outstanding equity interests of Gennum (TSX: GND), a leading supplier of high speed analog and mixed-signal semiconductors for the optical communications and video broadcast markets.

Upon consummation of the business acquisition, which constituted a change in control of Gennum, Gennum’s stock option awards and restricted shares became fully vested. Semtech acquired 100% of the outstanding shares and vested stock options, restricted shares, and deferred share units of Gennum for CDN $13.55 per share for a total purchase price of $506.5 million. The acquisition was financed with a combination of cash from Semtech’s international cash reserves and $347 million of five-year secured term loans, net of original issuance debt discount of $3 million (see Note 10).

The Gennum assets acquired and liabilities assumed are recorded at their acquisition-date fair values. Acquisition-related transaction costs are not included as a component of consideration transferred, but are accounted for as an expense in the period in which the costs are incurred. Any excess of the acquisition consideration over the fair value of assets acquired and liabilities assumed is allocated to goodwill. The goodwill resulted from expected synergies from the transaction, including complementary products that will enhance the Company’s overall product portfolio, and opportunities within new markets, and is not deductible for tax purposes. The acquired in-process research and development is recorded at fair value as an indefinite-lived intangible asset at the acquisition date until the completion or abandonment of the associated research and development efforts.

In connection with the acquisition, certain Gennum employees became entitled to payments upon a change in control and their subsequent termination. These payments, which totaled approximately $9.6 million, have been recognized as a post-acquisition compensation expense and included in the consolidated statements of income for fiscal year 2013 under “Selling, general and administrative.”

The Company’s allocation of the total purchase price as of March 20, 2012 is summarized below:

(in thousands)	At March 20, 2012
Cash	$	19,664
Accounts receivable, less allowances	14,032
Inventories	62,941
Prepaid expenses	3,832
Income taxes receivable	1,467
Deferred tax assets - current	8,590
Other current assets	7,804
Property, plant and equipment	25,702
Amortizable intangible assets	129,863
In-process research and development	29,100
Goodwill	261,891
Deferred tax assets - non-current	31,235
Other non-current assets	8
Deferred tax liabilities	(47,077		)
Accounts payable	(18,232		)
Accrued liabilities	(24,274		)
Total acquisition consideration	$	506,546
(in thousands)	At March 20, 2012
Amortizable intangible assets:
Developed technology	$	95,100
Customer relationships	28,000
Other intangible assets	6,763
	$	129,863

Primarily due to a change in the preliminary allocation of fair value with regard to deferred tax assets and liabilities, the preliminary goodwill allocation related to Gennum decreased by $0.9 million from $262.8 million as of October 28, 2012 to $261.9 million as of January 27, 2013. There was no impact to the Company’s consolidated statements of income for fiscal year 2013.

As of January 27, 2013, the Company has completed the purchase price allocation for its acquisition of Gennum.

The Company recognized approximately $11.4 million of transaction and integration expenses and $13.4 million severance costs associated with the Gennum acquisition in fiscal year 2013. These costs are included in the consolidated statements of income under “Selling, general and administrative.”

Net revenues attributable to Gennum since the acquisition date were $129.6 million, with a corresponding net loss of $36.5 million in fiscal year 2013.

In May 2012, the Company settled two pre-acquisition contingencies related to legal matters that were included in the purchase price allocation for a total cash payment of $4.2 million.

Pro Forma Financial Information

The results of operations of Gennum have been included in the Company’s consolidated statements of income since the acquisition date of March 20, 2012. The following table reflects the unaudited consolidated pro forma information as if the acquisition had taken place at the beginning of each period presented, after giving effect to certain adjustments including the following for fiscal years 2013 and 2012:

• increase in cost of goods sold associated with the fair value adjustment related to acquired inventory of $41.8 million for fiscal year 2012 and subsequent decrease of $39.4 million for fiscal year 2013;

• decrease in operating expense as a result of classifying recoveries of cost associated with product design and engineering services as a reduction to product development and engineering expense of $12.9 million for fiscal year 2012;

• increase in operating expense as a result of the settlement of two pre-acquisition contingencies related to legal matters of $4.2 million for fiscal year 2013;

• increase in amortization expense as a result of acquired intangible assets of $22.8 million for fiscal year 2012 and a subsequent decrease of $1.6 million for fiscal year 2013;

• increase in benefit for taxes of $23.4 million associated with the releasing of prior accrued taxes on foreign earnings for fiscal year 2012 and subsequent decrease for fiscal year 2013;

• increase in interest expense of $16.6 million associated with the $350 million term loans entered into to finance the acquisition for fiscal year 2012 and $1.7 million for fiscal year 2013; and

• the related tax effects.

Unaudited Consolidated Pro forma Information:

	Fiscal Year Ended
	January 27, 2013		January 29, 2012
(in thousands)	(unaudited)		(unaudited)
Revenue	$	603,067	$	604,906
Net income	$	56,980	$	66,377

The unaudited pro forma information presented does not purport to be indicative of the results that would have been achieved had the acquisition been consummated at the beginning of each period presented nor of the results which may occur in the future. The pro forma adjustments are based upon available information and certain assumptions that the Company believes are reasonable. The unaudited pro forma information does not include any adjustments for any restructuring activities, operating efficiencies or cost savings.

Cycleo SAS

On March 7, 2012, the Company completed the acquisition of Cycleo, a privately held company based in France that develops intellectual property (“IP”) for wireless long-range semiconductor products used in smart metering and other industrial and consumer markets. Under the terms of the agreement, Semtech paid the stockholders of Cycleo $5 million in cash at closing.

Total acquisition consideration is allocated to the acquired tangible and intangible assets and assumed liabilities of Cycleo based on their respective estimated fair values as of the acquisition date. Any excess of the acquisition consideration over the fair value of assets acquired and liabilities assumed is allocated to goodwill. The Company expects that all such goodwill will not be deductible for tax purposes.

As of January 27, 2013, the Company completed the purchase price allocation for its acquisition of Cycleo.

Additionally, pursuant to the earn-out arrangement with Cycleo stockholders, the Company potentially may make payments totaling up to approximately $16 million based on the achievement of a combination of certain revenue and operating income milestones by Cycleo over the period of four years beginning on April 30, 2012. For certain of the Cycleo stockholders, payment of the earn-out liability is contingent upon employment on the payout date and is accounted for as post-acquisition compensation expense over the service period. The portion of the earn-out liability that is not dependent on continued employment is included in the purchase price allocation at March 7, 2012.

Net revenues and earnings attributable to Cycleo since the acquisition date were not material. Pro forma results of operations have not been presented as the acquisition was not material to the Company’s consolidated financial statements.

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Commitments and Contingencies

12 Months Ended

Jan. 27, 2013

Commitments and Contingencies Disclosure [Abstract]

Commitments And Contingencies

Commitments and Contingencies

Leases

The Company leases facilities and certain equipment under operating lease arrangements expiring in various years through fiscal year 2020. The aggregate minimum annual lease payments under leases in effect on January 27, 2013 are as follows:

Minimum Annual Lease Payments

(in thousands)
Fiscal Year Ending:
2014	$	8,743
2015	5,644
2016	4,625
2017	3,321
2018	3,140
Thereafter	11,383
Total minimum lease commitments	$	36,856

Rent expense was $7.9 million, $4.4 million and $4.4 million for fiscal years 2013, 2012 and 2011, respectively. The Company received $133,000, $0 and $158,000 of sub-lease income in fiscal years 2013, 2012 and 2011, respectively.

Vendor Commitments

The Company has entered into multiple technology development agreements with one of its key wafer suppliers. Under the terms of these agreements, the Company is required to pay $1.2 million and $0.3 million for fiscal years 2014 and 2015, respectively.

Legal Matters

From time to time in the ordinary course of its business, the Company is involved in various claims, litigation, and other legal actions that are normal to the nature of its business, including with respect to intellectual property, contract, product liability, employment, and environmental matters.

In accordance with accounting standards regarding loss contingencies, the Company accrues an undiscounted liability for those contingencies where the incurrence of a loss is probable and the amount can be reasonably estimated, and the Company discloses the amount accrued and the amount of a reasonably possible loss in excess of the amount accrued, if such disclosure is necessary for its financial statements not to be misleading. The Company does not record liabilities when the likelihood that the liability has been incurred is probable but the amount cannot be reasonably estimated, or when the liability is believed to be only reasonably possible or remote.

Because litigation outcomes are inherently unpredictable, the Company’s evaluation of legal proceedings often involves a series of complex assessments by management about future events and can rely heavily on estimates and assumptions. While the consequences of certain unresolved proceedings are not presently determinable, and an estimate of the probable and reasonably possible loss or range of loss in excess of amounts accrued for such proceedings cannot be reasonably made, an adverse outcome from such proceedings could have a material adverse effect on the Company’s earnings in any given reporting period. However, in the opinion of management, after consulting with legal counsel, and taking into account insurance coverage, any ultimate liability related to current outstanding claims and lawsuits, individually or in the aggregate, is not expected to have a material adverse effect on the Company’s financial statements, as a whole.

The Company’s currently pending legal matters of note are discussed below:

Environmental Matters. In 2001, the Company was notified by the California Department of Toxic Substances Control (“State”) that it may have liability associated with the clean-up of the one-third acre Davis Chemical Company site in Los Angeles, California. The Company has been included in the clean-up program because it was one of the companies that used the Davis Chemical Company site for waste recycling and/or disposal between 1949 and 1990. The Company joined with other potentially responsible parties and entered into a Consent Order with the State that required the group to perform a soils investigation at the site and submit a remediation plan. The State has approved the remediation plan, which completes the group’s obligations under the Consent Order. Although the Consent Order does not require the group to remediate the site and the State has indicated it intends to look to other parties for remediation, the State has not yet issued “no further action” letters to the group members. To date, the Company’s share of the group’s expenses has not been material and has been expensed as incurred.

The Company has used an environmental firm, specializing in hydrogeology, to perform monitoring of the groundwater at the Company’s former facility in Newbury Park, California that was leased for approximately forty years. The Company vacated the building in May 2002. Certain contaminants have been found in the local groundwater and site soils. Groundwater monitoring results to date over a number of years indicate that groundwater contaminants are, in full or in material part, from adjacent facilities. Responsibility for soil contamination remains under investigation. The location of key soil contamination is concentrated in an area of an underground storage tank that the Company believes to have been installed and used in the early 1960s by a former tenant at the site who preceded the Company’s tenancy. There are no claims pending with respect to environmental matters at the Newbury Park site. The applicable regulatory agency having authority over the site issued joint instructions in November 2008, ordering the Company and the current owner of the site to perform additional assessments and surveys, and to create ongoing groundwater monitoring plans before any final regulatory action for “no further action” may be approved. In September 2009, the regulatory agency issued supplemental instructions to the Company and the current site owner regarding previously ordered site assessments, surveys and groundwater monitoring. Most recently, in November 2012, the regulatory agency added two more potentially responsible parties to the matter, based on historical evidence of past occupancy or operations at the site dating to the 1960s. In addition, the regulatory agency has issued draft cleanup and abatement orders to all the parties. Responses to the draft orders were submitted in a timely manner by all the parties in January 2013. The parties are expected to work cooperatively in responding to and determining the appropriate scope and extent of additional site investigative and categorization work, as well as in relation to any ultimate proposed clean up and abatement work.

The Company has accrued liabilities where it is probable that a loss will be incurred and the cost or amount of loss can be reasonably estimated. Based upon, and in anticipation of the likely outcome associated with the November 2012 draft cleanup and abatement order, the Company engaged an environmental firm to assist in an assessment of this site consistent with the direction of the draft order. Based on the Company’s preliminary assessment, it has determined a likely range of probable loss between $2.5 million and $5.7 million. Given the early nature of the draft clean up and abatement order and uncertainties associated with environmental assessment and the remediation activities, the Company is unable to determine a best estimate within the range of loss. Therefore, the Company recorded the minimum amount of $2.5 million in the third quarter of fiscal year 2013 under “Other long-term liabilities” on the consolidated balance sheets, and included in the consolidated statement of income under “Selling, general and administrative.” These estimates could change as a result of changes in planned remedial actions, further actions from the regulatory agency, remediation technology, and other factors.

V SEMICONDUCTOR LITIGATION

Gennum Corporation v. V Semiconductor Inc., et al. In a lawsuit filed by Gennum Corporation against V Semiconductor and the directors of V Semiconductor in the Ontario (Canada) Superior Court of Justice on February 3, 2012, the Company alleged that the defendants (i) misappropriated confidential information, (ii) had created and sold products based on the misappropriated confidential information (the “infringing products”), and (iii) had infringed copyright under applicable Canadian law to specified integrated circuit design scripts and related software code and design files (the “technology”). The Company also alleged that the individual named directors of V Semiconductor were in breach of contract, had unlawfully interfered with the economic interests of the Company, and had breached common law duties owed by them to the Company. The Company sought confirmation that its copyright had been infringed, injunctive relief against further infringement and damages in connection with the alleged infringement and alleged breaches referenced above.

The allegations against the individual defendants arose from and relate to the named defendants’ prior involvement with Gennum as the principals in the sale to Gennum of the business from which the applicable technology at issue arose. Such defendants were also employees subsequent to their sale of the applicable company to Gennum prior to their resignation.

V Semiconductor Inc. v. Semtech Corporation et al.    A complaint was filed on April 27, 2012 in the U.S. District Court, Eastern District of Michigan, Southern Division, against the Company, certain current and former employees and one non-employee director (the “U.S. litigation”).

The Complaint alleged that the Company and the named individual defendants had, through acts leading up to and connected with the initiation and prosecution of the Gennum Corporation v. V Semiconductor Inc. et. al. litigation in Ontario, Canada discussed above (the “Canadian litigation”) acted in violation of U.S. and Michigan state law regarding restraint of trade by filing a “sham” lawsuit. The Complaint further alleged that the Company and the named individual defendants had conducted a malicious prosecution via the Canadian litigation, had tortiously interfered with prospective economic advantage and business expectations of V Semiconductor, had engaged in unfair competition, and, as for the non-employee director individually, breached non-disclosure and confidentiality obligations owed by the non-employee director to V Semiconductor.

The Complaint alleged that the defendants filed the Canadian litigation frivolously, without merit, without factual substance, and for the primary purposes of causing a pending acquisition of V Semiconductor to fail, causing current and prospective customers of V Semiconductor to cease or avoid doing business with V Semiconductor, and preventing competing and allegedly superior technology and products from entering the marketplace.

The Complaint sought permanent injunctive relief against the alleged anti-competitive and tortious conduct of the defendants, and sought economic and punitive damages from the defendants.

Settlement Status

The parties to the Canadian litigation and U.S. litigation entered into a Confidential Settlement Agreement and Mutual Release, under which all claims in all suits have now been dismissed. The settlement was subject to the satisfaction of certain conditions, and became effective on or about September 7, 2012 following completion of the applicable conditions and contingencies. Pursuant to the settlement having become effective, the parties to the Canadian litigation and U.S. litigation have secured the dismissal and termination with prejudice of the applicable legal proceedings. The Company has not accrued any amounts in connection with the settlement.

Commercial Disputes

The Company periodically is involved in disputes arising in the normal course of business regarding products or services provided to the Company by vendors or service providers. Historically, the cost of commercial disputes has been immaterial to the Company’s consolidated financial statements.

Product Warranties

The Company’s general warranty policy provides for repair or replacement of defective parts. In some cases, a refund of the purchase price is offered. In certain instances the Company has agreed to other warranty terms, including some indemnification provisions.

The product warranty accrual reflects the Company’s best estimate of probable liability under its product warranties. The Company accrues for known warranty issues if a loss is probable and can be reasonably estimated, and accrues for estimated incurred but unidentified issues based on historical experience. Historically, warranty expense has been immaterial to the Company’s consolidated financial statements.

Retirement Plans

The Company contributed $1.2 million, $1.2 million and $1.0 million, respectively, in fiscal years 2013, 2012 and 2011 to the 401(k) retirement plan maintained for its domestic employees.

The Company contributes to the CSEM Pension fund, a Swiss multiemployer plan, that provides pension benefits (the “Plan”). The Plan is a foundation into which several employers are affiliated. Benefits payable from the pension plan include retirement pension, death, and disability benefits. The risk of participating in this multiemployer plan is different from a single-employer plan due to the comingling of assets and related investment returns and risks and aggregation of actuarial experience and related gains or losses for allocation amongst participating employers; contributions pursuant to prescribed formulae consistent for all participating employers; and, in the event of a participating employer’s withdrawal from the Plan, retirees receiving benefits from the Plan remain within the Plan and will continue to receive future benefit payments funded by the remaining participating employers thereafter.

The Plan is administered on behalf of a labor union, which is similar to common practices found in the United States involving collective bargaining agreements and labor unions. EIN/Pension plan number, Pension protection act zone status, FIP/RP status and Form 5500 are not applicable as the Plan is a Swiss plan governed by pension laws in Switzerland. The Company contributed $0.8 million, $0.8 million and $0.8 million, respectively, in fiscal years 2013, 2012 and 2011 to the Plan. At the date the Company’s financial statements were issued, the Plan’s audited financial statements were not available for the Plan year ending in 2012.

In addition, the Company also contributed $1.5 million in fiscal year 2013 to a defined contribution plan for its employees in Canada.

Deferred Compensation

The Company maintains a deferred compensation plan for certain officers and key executives that allow participants to defer a portion of their compensation for future distribution at various times permitted by the plan. This plan provides for a discretionary Company match up to a defined portion of the employee’s deferral, with any match subject to a vesting period.

The following table shows the compensation expense and forfeitures under this plan for fiscal years 2013, 2012 and 2011:

	Fiscal Year Ended
(in thousands)	January 27, 2013		January 29, 2012			January 30, 2011
Forfeitures	$	—	$	(194	)	$	(66	)
Compensation expense	1,839		885			2,166
Compensation expense, net of forfeitures	$	1,839	$	691		$	2,100

The Company’s liability for deferred compensation plan for certain officers and key executives is presented below:

(in thousands)	January 27, 2013		January 29, 2012
Accrued liabilities	$	530	$	901
Other long-term liabilities	13,396		10,222
Total deferred compensation liabilities under this plan	$	13,926	$	11,123

Additionally, pursuant to the earn-out arrangement with Cycleo stockholders, the Company potentially may make payments totaling up to approximately $16 million based on the achievement of a combination of certain revenue and operating income milestones by Cycleo over the period of 4 years beginning on April 30, 2012. For certain of the Cycleo stockholders, payment of the earn-out liability is contingent upon employment at the end of the 4-year period and is accounted for as post-acquisition compensation expense over the service period. The portion of the earn-out liability that is not dependent on continued employment is included in the purchase price allocation at March 7, 2012. During the fiscal year ended January 27, 2013, the Company recognized $1.8 million of compensation expense related to the deferred compensation liability.

The Company has purchased whole life insurance on the lives of certain current deferred compensation plan participants. This Company-owned life insurance is held in a grantor trust and is intended to cover a majority of the Company’s costs of the deferred compensation plan. The cash surrender value of the Company-owned life insurance was $10.0 million and $10.2 million as of January 27, 2013 and January 29, 2012, respectively, and is included in “Other assets” on the consolidated balance sheet.

Indemnification

The Company has entered into agreements with its current executive officers and directors indemnifying them against certain liabilities incurred in connection with the performance of their duties. The Company’s Certificate of Incorporation and Bylaws contain comparable indemnification obligations with respect to the Company’s current directors and employees.

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Interest Rate Derivative Agreement

12 Months Ended

Jan. 27, 2013

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Interest Rate Derivative Agreement

Interest Rate Derivative Agreement

In June 2012, the Company entered into an interest rate cap agreement with a $175 million notional amount and an upfront payment of $1.1 million. The agreement matures on February 22, 2016 and caps interest rates on one-month LIBOR at 1.00%.

The interest rate cap agreement has been designated as a cash flow hedge of interest rate risk and is recorded at estimated fair value as of January 27, 2013. 

The Company determined that the interest rate cap agreement is highly effective in offsetting future variable interest payments associated with the hedged portion of the Company’s term loans. No ineffectiveness was recorded during fiscal year 2013. The Company did not have any active interest contracts outstanding prior to June 2012.

The amount of unrealized losses on the interest rate cap recorded in other comprehensive loss at January 27, 2013 that is expected to be reclassified into interest expense in the next twelve months, if interest rates remain unchanged, is approximately $78,000.

The fair value of the interest rate cap at January 27, 2013 is determined based on assumptions that management believes market participants would use in pricing. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities. Based on the inputs used in the valuation, the Company has determined that the derivative valuation is classified in Level 2 of the fair value hierarchy.

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Stock-Based Compensation - Allocation of Stock-based Compensation (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, pre-tax	$ 24,528	$ 24,020	$ 29,010
Net change in stock-based compensation capitalized into inventory	(33)	(83)	(116)
Cost of sales
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, pre-tax	1,218	983	1,802
Selling, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, pre-tax	14,965	15,839	19,310
Product development and engineering
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, pre-tax	$ 8,345	$ 7,198	$ 7,898

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Property, Plant and Equipment

12 Months Ended

Jan. 27, 2013

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

The following is a summary of property and equipment, at cost less accumulated depreciation:

(in thousands)	January 27, 2013			January 29, 2012
Property	$	9,050		$	5,991
Buildings	18,627			18,580
Leasehold improvements	8,881			5,768
Machinery and equipment	130,595			98,895
Furniture and office equipment	30,120			23,428
Construction in progress	6,330			2,444
Property, plant and equipment, gross	203,603			155,106
Less accumulated depreciation and amortization	(101,766		)	(85,393		)
Property, plant and equipment, net	$	101,837		$	69,713

The net book value of equipment and machinery that are consigned to a foundry in China is $7.9 million and $9.4 million as of January 27, 2013 and January 29, 2012, respectively.

The following table summarizes depreciation and amortization expense for property, plant and equipment:

	Fiscal Year Ended
(in thousands)	January 27, 2013		January 29, 2012		January 30, 2011
Depreciation and amortization expense	$	17,915	$	9,908	$	6,928

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Investments - Summary of Investments (Details) (USD $) In Thousands, unless otherwise specified	Jan. 27, 2013	Jan. 29, 2012
Investment [Line Items]
Market Value	$ 12,880	$ 100,643
Adjusted Cost	12,873	100,594
Gross Unrealized Gain	7	49
Agency securities
Investment [Line Items]
Market Value	7,907	26,132
Adjusted Cost	7,900	26,110
Gross Unrealized Gain	7	22
Corporate issues
Investment [Line Items]
Market Value	0	4,511
Adjusted Cost	0	4,484
Gross Unrealized Gain	0	27
Bank time deposits
Investment [Line Items]
Market Value	4,973	70,000
Adjusted Cost	4,973	70,000
Gross Unrealized Gain	$ 0	$ 0

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Geographic Information and Concentration of Risk - Summary of Sales Activity to Countries that Represent Greater than 10% of Total Net Sales (Details) (Net sales revenue)	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%
Minimum concentration risk threshold	10.00%
Geographic concentration risk
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	69.00%	74.00%	74.00%
Geographic concentration risk | United States
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	17.00%	20.00%	23.00%
Geographic concentration risk | China (including Hong Kong)
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	35.00%	38.00%	34.00%
Geographic concentration risk | Japan
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	10.00%	8.00%	7.00%
Geographic concentration risk | South Korea
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	7.00%	8.00%	10.00%

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Fair Value Measurements

12 Months Ended

Jan. 27, 2013

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

Instruments Measured at Fair Value on a Recurring Basis

Financial assets measured and recorded at fair value on a recurring basis consisted of the following types of instruments:

(in thousands)	Fair Value as of January 27, 2013								Fair Value as of January 29, 2012
	Total		(Level 1)		(Level 2)		(Level 3)		Total		(Level 1)		(Level 2)		(Level 3)
Agency securities	$	7,907	$	—	$	7,907	$	—	$	26,132	$	—	$	26,132	$	—
Corporate issues	—		—		—		—		4,511		—		4,511		—
Bank time deposits	4,973		—		4,973		—		70,000		—		70,000		—
Total available-for-sale securities	12,880		—		12,880		—		100,643		—		100,643		$	—
Interest rate cap	544		—		544		—		—		—		—		—
Total financial assets	$	13,424	$	—	$	13,424	$	—	$	100,643	$	—	$	100,643	$	—

Available-for-sale securities included in Level 2 are valued utilizing inputs obtained from an independent service (the “Service”), which uses quoted market prices for identical or comparable instruments rather than direct observations of quoted prices in active markets. The Service gathers observable inputs for all of our fixed income securities from a variety of industry data providers, for example, large custodial institutions and other third-party sources. Once the observable inputs are gathered by the Service, all data points are considered and an average price is determined. The Service’s providers utilize a variety of inputs to determine their quoted prices. The Company reviews and evaluates the values provided by the Service and agrees with the valuation methods and assumptions used in determining the fair value of investments. The Company believes this method provides a reasonable estimate for fair value.

The fair value of the interest rate cap at January 27, 2013 is estimated as described in Note 11 and is included in “Other assets” on the consolidated balance sheet.

Financial assets measured and recorded at fair value on a recurring basis were presented on the Company’s consolidated balance sheets as follows:

	Fair Value as of January 27, 2013								Fair Value as of January 29, 2012
(in thousands)	Total		(Level 1)		(Level 2)		(Level 3)		Total		(Level 1)		(Level 2)		(Level 3)
Temporary investments	$	4,973	$	—	$	4,973	$	—	$	83,121	$	—	$	83,121	$	—
Long-term investments	7,907		—		7,907		—		17,522		—		17,522		—
Other assets	544		—		544		—		—		—		—		—
Total financial assets	$	13,424	$	—	$	13,424	$	—	$	100,643	$	—	$	100,643	$	—

During fiscal years 2013 and 2012, the Company had no transfers of financial assets or liabilities between Level 1, Level 2 or Level 3. As of January 27, 2013 and January 29, 2012, the Company had not elected the fair value option for any financial assets and liabilities for which such an election would have been permitted.

Instruments Not Recorded at Fair Value on a Recurring Basis

Some of the Company’s financial instruments are not measured at fair value on a recurring basis but are recorded at amounts that approximate fair value due to their liquid or short-term nature. Such financial assets and financial liabilities include: cash and cash equivalents, receivables, net, certain other assets, accounts payable and accrued expenses, accrued personnel costs, and other current liabilities.

The Company’s long-term debt is not recorded at fair value on a recurring basis, but is measured at fair value for disclosure purposes. The fair value of the Company’s debt is estimated primarily based on quotes (“ask prices”) provided by pricing services generated in a market with insufficient volume to comprise an active market (Level 2 inputs) based on the Company’s debt obligations. The fair value of the Company’s debt was $336.7 million at January 27, 2013.

Assets and Liabilities Recorded at Fair Value on a Non-Recurring Basis

The Company reduces the carrying amounts of its goodwill, intangible assets, long-lived assets and non-marketable equity security to fair value when held for sale or determined to be impaired.

For its investment in equity interests, the Company has not identified events or changes in circumstances that may have a significant adverse effect on the fair value of its cost method investment during the last three months of fiscal year 2013.

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Inventories

12 Months Ended

Jan. 27, 2013

Inventory Disclosure [Abstract]

Inventories

Inventories

Inventories, consisting of material, material overhead, labor, and manufacturing overhead, are stated at the lower of cost (first-in, first-out) or market and consist of the following:

(in thousands)	January 27, 2013		January 29, 2012
Raw materials	$	1,970	$	4,871
Work in progress	52,669		30,884
Finished goods	20,239		11,240
Inventories	$	74,878	$	46,995

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Goodwill and Intangible Assets

12 Months Ended

Jan. 27, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Goodwill and Intangible Assets

Goodwill – Goodwill balances as of January 27, 2013 and January 29, 2012 are presented below:

(in thousands)	Carrying Amount
Balance as of January 29, 2012	$	129,651
Acquisition of Gennum Corporation	261,891
Acquisition of Cycleo SAS	2,042
Balance as of January 27, 2013	$	393,584

During fiscal year 2013, goodwill increased by approximately $263.9 million due to the Company’s acquisitions of Gennum and Cycleo (see Note 3).

In fiscal year 2012, the Company reorganized its reporting structure in a manner that changed the composition of its product lines within its reporting units. The components of the Advanced Communications and Sensing reporting unit were split into two reporting units consisting of the Advanced Communications and the Wireless and Sensing reporting units. As a result of the change, in fiscal year 2012, goodwill was reassigned to the reporting units affected using a relative fair value allocation approach. Subsequent to the reorganization in the third quarter of fiscal year 2012, the goodwill associated with the Advanced Communications and Sensing reporting unit was reassigned (as of November 2011) such that 10% of goodwill is allocated to the Wireless and Sensing reporting unit and 90% of the goodwill is allocated to the Advanced Communications reporting unit. In connection with the reorganization, the Company assessed whether an indicator of impairment existed prior to the reorganizations and concluded that no such indicators were present in fiscal year 2012.

As a result of the acquisition of Gennum and Cycleo (see Note 3), the Company acquired $261.9 million of goodwill, associated with the newly formed Gennum reporting unit, and added $2.0 million to the Wireless and Sensing reporting unit.

Goodwill was tested for impairment as of November 30, 2012, the date of the Company’s annual impairment review. The Company concluded that the fair values of each of the Advanced Communications, the Wireless and Sensing, and Gennum reporting units exceeded their respective carrying values of goodwill and no impairment existed as of January 27, 2013. The Company estimated the fair values of its reporting units using the income approach, which utilizes estimates of discounted future cash flows. The discounted cash flows for each reporting unit were based on discrete financial forecasts developed by management for planning purposes. Cash flows beyond the discrete forecasts were estimated using a terminal value calculation, which incorporated historical and forecasted financial trends for each identified reporting unit and considered perpetual earnings growth rates for publicly traded peer companies. Future cash flows were discounted to present value by incorporating appropriate present value techniques. Specifically, the income approach valuations included the following assumptions:

Discount rate	10.0% - 13.0%
Perpetual growth rate	3.0%
Tax rate	14.7% - 20.0%
Risk-free rate	2.4%
Peer company beta	1.3 - 1.6

Purchased Intangibles - The following table sets forth the Company’s finite-lived intangible assets resulting from business acquisitions and technology licenses purchased, which continue to be amortized:

		January 27, 2013							January 29, 2012
(in thousands)	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Core technologies	2-10 years	$	173,724	$	(40,867	)	$	132,857	$	65,900	$	(21,031	)	$	44,869
Customer relationships	7-10 years	40,130		(7,736		)	32,394		12,130		(2,929		)	9,201
Technology licenses (1)	5-10 years	8,164		(1,056		)	7,108		3,000		(250		)	2,750
Other intangibles assets	1-5 years	6,600		(4,601		)	1,999		—		—			—
Total finite-lived intangible assets		$	228,618	$	(54,260	)	$	174,358	$	81,030	$	(24,210	)	$	56,820

(1) Technology licenses relate to licensing agreements entered into by the Company. Amortization expense related to technology licenses is reported as “Product development and engineering” in the consolidated statements of income.

During fiscal year 2013, acquired finite-lived intangible assets increased by approximately $147.6 million mainly due to $129.9 million due to the acquisition of Gennum, $6.1 million from the acquisition of Cycleo and $5.0 million from additional technology licenses purchased. In addition, acquired finite-lived intangible assets increased by $6.6 million due to the transfer from indefinite-lived intangible assets to core technologies upon the completion of one in-process research and development project from the acquisition of Sierra Monolithics, Inc. (“SMI”) in 2009.

Core technologies include $95.1 million and $6.1 million of finite-lived intangible assets from the acquisition of Gennum and the acquisition of Cycleo, respectively (see Note 3). The Company concluded that the intangible assets classified as core technologies were identifiable intangible assets, separate from goodwill, since they were capable of being separated from Gennum or Cycleo and sold, transferred or licensed, regardless of whether the Company intended to do so. Each product technology was valued separately since each was determined to have a different remaining useful life. The value for the underlying core IP technology from the acquisition of Gennum and Cycleo was assessed utilizing a discounted cash flow methodology and/or a relief from royalty method.

The nature of Gennum’s core technology was categorized as follows:

	January 27, 2013
(in thousands)	Fair Value		Estimated Useful Life
Underlying intellectual property - Clock and data recovery	$	31,000	8 years
Video broadcast and surveillance	39,000		7-8 years
Optical communication	21,000		6 years
Other	4,100		6-7 years
Total	$	95,100

For the fiscal years 2013, 2012 and 2011, amortization expense related to finite-lived intangible assets was $29.2 million, $8.4 million and $9.5 million, respectively. Amortization expense related to finite-lived intangible assets is reported as “Intangible amortization and impairments” in the consolidated statements of income.

The estimated annual amount of future amortization expense for finite-lived intangible assets will be as follows:

(in thousands)
To be recognized in:	Technology license		Sierra Monolithics		Gennum		Cycleo		Total
Fiscal year 2014	$	1,507	$	8,870	$	18,778	$	1,007	$	30,162
Fiscal year 2015	1,465		8,870		18,132		1,007		29,474
Fiscal year 2016	1,436		8,870		17,586		1,007		28,899
Fiscal year 2017	1,186		8,870		17,499		1,007		28,562
Fiscal year 2018	776		8,160		17,499		1,007		27,442
Thereafter	738		8,490		20,510		81		29,819
Total expected amortization expense	$	7,108	$	52,130	$	110,004	$	5,116	$	174,358

The following table sets forth the Company’s indefinite-lived intangible assets resulting from business acquisitions:

	January 27, 2013							January 29, 2012
(in thousands)	Gross Carrying Amount		Accumulated Impairment Loss			Net Carrying Amount		Gross Carrying Amount		Accumulated Impairment Loss			Net Carrying Amount
In-process research and development	$	34,870	$	(3,170	)	$	31,700	$	12,370	$	(2,470	)	$	9,900
Total indefinite-lived intangible assets	$	34,870	$	(3,170	)	$	31,700	$	12,370	$	(2,470	)	$	9,900

During fiscal year 2013, acquired indefinite-lived intangible assets increased by approximately $22.5 million mainly due to $29.1 million related to the acquisition of Gennum, partially offset by $6.6 million due to the transfer from indefinite-lived intangible assets to core technologies upon the completion of one in-process research and development project from SMI acquisition.

Acquired in-process research and development projects (“IPR&D”) was tested for impairment as of November 30, 2012, the date of the Company’s annual impairment review. With the exception of the impairment charge of $700,000 recorded to write-off acquired IPR&D from SMI acquisition, the Company concluded that the fair value of the acquired in-process research and developments exceeded the carrying value and no impairment existed as of January 27, 2013. The fair value of the IPR&D projects was determined using using an income approach or replacement cost approach as applicable. The replacement cost approach was used for IPR&D projects that were considered long-term core investments and were not anticipated to be profitable for a period of time. IPR&D projects which were valued using an income approach, measured the returns attributable to each specific IPR&D project, discounted to present value using a risk-adjusted rate of return, including as appropriate, any tax benefits derived from amortizing the intangible assets for tax purposes. Significant factors considered in the calculation of the rate of return are the weighted average cost of capital and return on assets, as well as the risk inherent in the development process, including the likelihood of achieving technology success and market acceptance. For IPR&D projects valued using a replacement cost approach, value was estimated by developing the cost to either replace or reproduce (replicate) the IPR&D to its current state. The key unobservable inputs utilized in the model include discount rates ranging from 12.0% to 18.0%, a market participant tax rate of 12.3% to 17.0%, and a probability adjusted level of future cash flows based on current product and market data.

During the third quarter of fiscal year 2012, the Company abandoned certain development efforts related to acquired intangible assets. As a result of these actions, the Company concluded that a portion of the net carrying amount of in-process research and development was not recoverable and therefore it recorded an impairment charge against the net carrying value in the three month period ended October 30, 2011, as summarized below:

(in thousands)	Net Carrying
In-process research and development impairment	Amount		Impairment
High-speed switching technology for power management applications (1)	$	2,070	$	(2,070	)
Integrated driver for telecommunications applications (2)	400		(400		)
Total	$	2,470	$	(2,470	)

(1) related to the February 2009 Leadis Technology Inc. acquisition.

(2) related to the December 2009 Sierra Monolithics, Inc. acquisition.

These impairment charges are included in “Intangible amortization and impairments” on the consolidated statements of income.

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Fair Value Measurements - Narrative (Details) (Nonrecurring, USD $) In Millions, unless otherwise specified	Jan. 27, 2013
Nonrecurring
Fair Value Measurements, Financial Instruments not Measured at Fair Value on a Recurring Basis [Abstract]
Fair value of debt	$ 336.7

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Stock-Based Compensation - Net Impact of Stock-based Compensation, After Tax on Net Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Share-based Compensation [Abstract]
Stock-based compensation	$ 24,528	$ 24,020	$ 29,010
Associated tax effect	(5,120)	(5,693)	(9,170)
Net effect on net income	$ 19,408	$ 18,327	$ 19,840

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Fair Value Measurements - Financial Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis by Balance Sheet Line (Details) (USD $) In Thousands, unless otherwise specified	Jan. 27, 2013	Jan. 29, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Temporary investments	$ 4,973	$ 83,121
Long-term investments	7,907	17,522
Other assets	544	0
Total financial assets	13,424	100,643
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Temporary investments	4,973	83,121
Long-term investments	7,907	17,522
Other assets	544	0
Total financial assets	$ 13,424	$ 100,643

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Income Taxes - Liability for Uncertain Tax Positions (Details) (USD $) In Thousands, unless otherwise specified	Jan. 27, 2013	Jan. 29, 2012
Income Tax Uncertainties [Abstract]
Accrued liabilities	$ 188	$ 437
Other long-term liabilities	10,887	11,159
Total accrued taxes	$ 11,075	$ 11,596

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Investments - Schedule of Interest Income Generated from Investments (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Investments [Abstract]
Interest income	$ 404	$ 1,213	$ 1,051

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Stock-Based Compensation - Summary of the Activity for Employee Stock Unit Awards (Details) (Employee stock unit awards, USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 27, 2013		Jan. 29, 2012		Jan. 30, 2011		Jan. 31, 2010
Employee stock unit awards
Number of Units
Beginning balance (in shares)	1,982		2,058		1,410
Stock units granted (in shares)	1,517		810		1,181
Stock units vested (in shares)	(699)		(627)		(404)
Stock units forfeited (in shares)	(242)		(259)		(129)
Ending balance (in shares)	2,558		1,982		2,058		1,410
Weighted Averaged Grant Date Fair Value (per unit)
Beginning balance (in dollars per share)	$ 19.06		$ 16.70		$ 15.72
Stock units granted (in dollars per share)	$ 26.73		$ 22.74		$ 17.62
Stock units vested (in dollars per share)	$ 18.20		$ 16.61		$ 19.20
Stock units forfeited (in dollars per share)	$ 23.65		$ 17.75		$ 19.50
Ending balance (in dollars per share)	$ 23.41		$ 19.06		$ 16.70		$ 15.72
Aggregate Intrinsic Value
Aggregate intrinsic value of stock units vested	$ 18,438	[1]	$ 14,333	[1]	$ 7,749	[1]
Aggregate Unrecognized Compensation
Beginning balance	31,472		29,763		17,713
Ending balance	$ 49,374		$ 31,472		$ 29,763		$ 17,713
Weighted Average Period Over Which Expected to be Recognized (in years)
Ending Balance	2 years 6 months		2 years 4 months 24 days		2 years 8 months 12 days		3 years 4 months 24 days

[1] Reflects the value of Semtech stock on the date that the stock unit vested.

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Fair Value Measurements (Tables)

12 Months Ended

Jan. 27, 2013

Fair Value Disclosures [Abstract]

Financial assets and liabilities measured and recorded at fair value on a recurring basis

Financial assets measured and recorded at fair value on a recurring basis consisted of the following types of instruments:

(in thousands)	Fair Value as of January 27, 2013								Fair Value as of January 29, 2012
	Total		(Level 1)		(Level 2)		(Level 3)		Total		(Level 1)		(Level 2)		(Level 3)
Agency securities	$	7,907	$	—	$	7,907	$	—	$	26,132	$	—	$	26,132	$	—
Corporate issues	—		—		—		—		4,511		—		4,511		—
Bank time deposits	4,973		—		4,973		—		70,000		—		70,000		—
Total available-for-sale securities	12,880		—		12,880		—		100,643		—		100,643		$	—
Interest rate cap	544		—		544		—		—		—		—		—
Total financial assets	$	13,424	$	—	$	13,424	$	—	$	100,643	$	—	$	100,643	$	—

Financial assets and liabilities measured and recorded at fair value on a recurring basis, presented on the consolidated condensed balance sheets

Financial assets measured and recorded at fair value on a recurring basis were presented on the Company’s consolidated balance sheets as follows:

	Fair Value as of January 27, 2013								Fair Value as of January 29, 2012
(in thousands)	Total		(Level 1)		(Level 2)		(Level 3)		Total		(Level 1)		(Level 2)		(Level 3)
Temporary investments	$	4,973	$	—	$	4,973	$	—	$	83,121	$	—	$	83,121	$	—
Long-term investments	7,907		—		7,907		—		17,522		—		17,522		—
Other assets	544		—		544		—		—		—		—		—
Total financial assets	$	13,424	$	—	$	13,424	$	—	$	100,643	$	—	$	100,643	$	—

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Significant Accounting Policies - Estimated Useful Lives of Property, Plant, and Equipment (Details)	12 Months Ended
	Jan. 27, 2013
Buildings and leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	7 years
Buildings and leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	39 years
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	8 years
Transportation vehicles
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Estimated useful life	7 years
Computers and computer software
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years

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Interest Income and Other (Expense) Income, Net (Notes)

12 Months Ended

Jan. 27, 2013

Interest Income and Other Expense Disclosure [Abstract]

Interest Income and Other (Expense) Income, Net

Interest Income and Other (Expense) Income, Net

Interest and other expense, net, consist of the following:

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Interest income	$	404		$	1,213		$	1,051
Non-recoverable VAT tax	(217		)	(156		)	(118		)
Foreign currency transaction loss	(354		)	(504		)	(428		)
Miscellaneous (expense) income	(810		)	40			69
Interest income and other (expense), net	$	(977	)	$	593		$	574

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Reorganization Costs (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012
Reorganizations [Abstract]
Beginning balance	$ 16	$ 0
Reorganization costs	(13,387)	(1,981)
Cash payments	12,073	1,965
Ending balance	$ 1,330	$ 16

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Stock Repurchase Program And Shares Withheld From Vested Restricted Shares

12 Months Ended

Jan. 27, 2013

Equity [Abstract]

Stock Repurchase Program And Shares Withheld From Vested Restricted Shares

Stock Repurchase Program and Shares Withheld from Vested Restricted Shares

On March 4, 2008, the Company announced that its Board of Directors authorized the repurchase of up to $50 million of the Company’s common stock from time to time through negotiated or open market transactions (the “2008 Program”). The 2008 Program does not have an expiration date. On August 24, 2011, the Company announced a $36 million expansion of the 2008 Program. On November 30, 2011, the Company announced an additional $50 million expansion of the 2008 Program.

In addition to repurchase activity under the 2008 Program, the Company typically withholds shares from vested restricted stock to pay employee payroll and income tax withholding liabilities.

The following table summarizes the stock repurchase activities and shares withheld from vested restricted shares during the periods indicated:

	Fiscal Year Ended
	January 27, 2013			January 29, 2012			January 30, 2011
(in thousands, except number of shares)	Shares	Value		Shares	Value		Shares	Value
Shares repurchased under the 2008 Program	263,443	$	7,500	2,252,099	$	50,000	74,702	$	1,258
Shares withheld from vested restricted shares	9,696	269		27,427	665		89,934	1,561
Total treasury shares acquired	273,139	$	7,769	2,279,526	$	50,665	164,636	$	2,819

The Company currently intends to hold the repurchased and withheld shares as treasury stock. The Company typically reissues treasury shares to settle stock option exercises and restricted share grants.

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Income Taxes - Narrative (Details) (USD $)	3 Months Ended		12 Months Ended				3 Months Ended
	Apr. 29, 2012	Jan. 31, 2010	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011	Jan. 27, 2013 Internal Revenue Service (IRS)	Jul. 29, 2012 Canada Tax Authority	Jan. 27, 2013 Canada Tax Authority	Jan. 27, 2013 State and local jurisdiction
Income Tax [Line Items]
Interest and penalties expense related to unrecognized tax benefits			$ 50,000	$ 50,000
Release in reserves for uncertain tax positions			1,100,000
Operating loss carryforwards						73,700,000			86,300,000
Net operating loss carryforward deferred tax asset attributed to excess equity deductions			8,300,000
Research credits available to offset taxable income						6,000,000		34,700,000	12,300,000
Alternative minimum tax credits available						1,300,000
Unremitted earnings related to foreign subsidiaries			383,700,000
Foreign earnings no longer permanently reinvested offshore		120,000,000
Repatriated foreign subsidiary earnings		50,000,000
Unrepatriated foreign subsidiary earnings		70,000,000
Foreign earnings permanently reinvested offshore	70,000,000
One-time tax benefit	23,400,000
Percentage of uncertain tax positions evaluating criteria			50.00%
Net tax benefits, if recognized, would impact the effective tax rate			11,100,000	11,600,000
Unrecognized tax benefits, interest and penalties			293,000	243,000
Discrete charge to the Canadian tax provision as a result of newly enacted tax legislation			(39,359,000)	757,000	1,952,000		3,400,000
Reasonably possible decrease in unrecognized tax benefits within twelve months			$ 200,000

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Organization and Basis of Presentation (Segment Information) (Details)	12 Months Ended
	Jan. 27, 2013 operating_segment reportable_segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of Reportable Segments	1
Number of Operating Segments	5

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Commitments and Contingencies - Schedule of Compensation Expense and Forfeitures Under Deferred Compensation Plan (Details) (Deferred Compensation Plan For Officers And Executives [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Deferred Compensation Plan For Officers And Executives [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Forfeitures	$ 0	$ (194)	$ (66)
Compensation expense, excluding forfeitures	1,839	885	2,166
Compensation expense, net of forfeitures	$ 1,839	$ 691	$ 2,100

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Interest Income and Other (Expense) Income, Net (Tables)

12 Months Ended

Jan. 27, 2013

Interest Income and Other Expense Disclosure [Abstract]

Schedule of interest income and other expense, net

Interest and other expense, net, consist of the following:

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Interest income	$	404		$	1,213		$	1,051
Non-recoverable VAT tax	(217		)	(156		)	(118		)
Foreign currency transaction loss	(354		)	(504		)	(428		)
Miscellaneous (expense) income	(810		)	40			69
Interest income and other (expense), net	$	(977	)	$	593		$	574

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Geographic Information and Concentration of Risk - Narrative (Details) (Foundry in China, USD $) In Millions, unless otherwise specified	Jan. 27, 2013	Jan. 29, 2012
Foundry in China
Consigned property, plant and equipment	$ 7.9	$ 9.4

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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jan. 27, 2013	Jan. 29, 2012
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 4,917	$ 3,594
Accumulated depreciation	$ 101,766	$ 85,393
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	78,136,144	78,136,144
Common stock, shares outstanding	66,607,347	64,964,780
Treasury stock, at cost, shares	11,528,797	13,171,364

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Stock-Based Compensation - Summarized Information of Stock Options Outstanding (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 27, 2013
Stock Options Price Range Analysis-Outstanding
Price Range Analysis - Outstanding
Number of Shares	2,579
Weighted Average Exercise Price (in dollars per share)	$ 18.29
Weighted Average Contractual Term	2 years 8 months 16 days
Stock Options Price Range Analysis-Outstanding | $1.15 - $4.53
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range - lower range limit (in dollars per share)	$ 1.15
Exercise price range - upper range limit (in dollars per share)	$ 4.53
Price Range Analysis - Outstanding
Number of Shares	9
Weighted Average Exercise Price (in dollars per share)	$ 2.52
Weighted Average Contractual Term	4 years 3 months 7 days
Stock Options Price Range Analysis-Outstanding | $7.79 - $13.15
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range - lower range limit (in dollars per share)	$ 7.79
Exercise price range - upper range limit (in dollars per share)	$ 13.15
Price Range Analysis - Outstanding
Number of Shares	247
Weighted Average Exercise Price (in dollars per share)	$ 11.59
Weighted Average Contractual Term	2 years 1 month 6 days
Stock Options Price Range Analysis-Outstanding | $13.76 - $20.90
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range - lower range limit (in dollars per share)	$ 13.76
Exercise price range - upper range limit (in dollars per share)	$ 20.90
Price Range Analysis - Outstanding
Number of Shares	1,671
Weighted Average Exercise Price (in dollars per share)	$ 16.58
Weighted Average Contractual Term	2 years 1 month 17 days
Stock Options Price Range Analysis-Outstanding | $21.02 - $29.68
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range - lower range limit (in dollars per share)	$ 21.02
Exercise price range - upper range limit (in dollars per share)	$ 29.68
Price Range Analysis - Outstanding
Number of Shares	652
Weighted Average Exercise Price (in dollars per share)	$ 25.43
Weighted Average Contractual Term	4 years 5 months 1 day
Stock Options Price Range Analysis-Exercisable
Price Range Analysis - Exercisable
Number of Shares	1,937
Weighted Average Exercise Price (in dollars per share)	$ 16.51
Weighted Average Contractual Term	2 years 0 months 25 days
Stock Options Price Range Analysis-Exercisable | $1.15 - $4.53
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range - lower range limit (in dollars per share)	$ 1.15
Exercise price range - upper range limit (in dollars per share)	$ 4.53
Price Range Analysis - Exercisable
Number of Shares	9
Weighted Average Exercise Price (in dollars per share)	$ 2.52
Weighted Average Contractual Term	4 years 3 months 7 days
Stock Options Price Range Analysis-Exercisable | $7.79 - $13.15
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range - lower range limit (in dollars per share)	$ 7.79
Exercise price range - upper range limit (in dollars per share)	$ 13.15
Price Range Analysis - Exercisable
Number of Shares	241
Weighted Average Exercise Price (in dollars per share)	$ 11.62
Weighted Average Contractual Term	2 years 0 months 14 days
Stock Options Price Range Analysis-Exercisable | $13.76 - $20.90
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range - lower range limit (in dollars per share)	$ 13.76
Exercise price range - upper range limit (in dollars per share)	$ 20.90
Price Range Analysis - Exercisable
Number of Shares	1,494
Weighted Average Exercise Price (in dollars per share)	$ 16.52
Weighted Average Contractual Term	1 year 11 months 16 days
Stock Options Price Range Analysis-Exercisable | $21.02 - $29.68
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range - lower range limit (in dollars per share)	$ 21.02
Exercise price range - upper range limit (in dollars per share)	$ 29.68
Price Range Analysis - Exercisable
Number of Shares	193
Weighted Average Exercise Price (in dollars per share)	$ 23.18
Weighted Average Contractual Term	2 years 9 months 25 days

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Significant Accounting Policies

12 Months Ended

Jan. 27, 2013

Accounting Policies [Abstract]

Significant Accounting Policies

Significant Accounting Policies

Cash, Cash Equivalents and Investments

The Company considers all highly liquid investments with an original maturity of 90 days or less to be cash equivalents. The Company maintains cash balances and investments in highly qualified financial institutions. At various times such amounts are in excess of insured limits. Investments consist of government and corporate obligations and bank time deposits. The Company’s investment policy restricts investments to high credit quality investments with limits on the length to maturity and the amount invested with any one issuer. These investments, especially corporate obligations, are subject to default risk. The Company designates its investments as available for sale (“AFS”). Investments designated as AFS are reported at fair value. The Company records the unrealized gains and losses, net of tax, in stockholders’ equity as a component of comprehensive income. Realized gains or losses are recorded in “Interest income and other expense, net” in the consolidated statements of income.

Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable are recorded at net realizable value or the amount that the Company expects to collect on gross customer trade receivables. The Company evaluates the collectability of its accounts receivable based on a combination of factors. The Company generally does not require collateral on accounts receivable as the majority of the Company’s customers are large, well-established companies. Historically, bad debt provisions have been consistent with management’s expectations. If the Company becomes aware of a customer’s inability to meet its financial obligations after a sale has occurred, it records an allowance to reduce the net receivable to the amount it reasonably believes it will be able to collect from the customer. For all other customers, the Company recognizes allowances for doubtful accounts based on the length of time the receivables are past due, the current business environment and historical experience. If the financial condition of the Company’s customers were to deteriorate or if economic conditions worsen, additional allowances may be required in the future. All of the Company’s accounts receivables are trade-related receivables. See Note 16 for a discussion of concentration risks.

Inventories

Inventories are stated at lower of cost or market and consist of materials, labor and overhead. The Company determines the cost of inventory by the first-in, first-out method. The Company evaluates inventories for excess quantities and obsolescence. This evaluation includes analyses of sales levels by product and projections of future demand. In order to state the inventory at lower of cost or market, the Company maintains reserves against its inventory. If future demand or market conditions are less favorable than the Company’s projections, a write-down of inventory may be required, and would be reflected in cost of goods sold in the period the revision is made.

Business Combinations

The Company accounts for business combinations at fair value. Goodwill is measured as the excess of consideration transferred over the acquisition date net fair values of the assets acquired and the liabilities assumed. All changes that do not qualify as measurement period adjustments are included in current period earnings. Significant judgment is required to determine the estimated fair value for assets and liabilities acquired and to assigning their respective useful lives. The fair values assigned to tangible and intangible assets acquired and liabilities assumed, including contingent consideration, are based on management’s estimates and assumptions, as well as other information compiled by management, including available historical information and valuations that utilize customary valuation procedures and techniques.

The Company employs the income approach to estimate the fair value of intangible assets, which is based on forecasts of the expected future cash flows attributable to the respective assets. The fair value of acquired in-process research and development projects (“IPR&D”) was determined using an income approach or replacement cost approach as applicable. The replacement cost approach was used for IPR&D projects that were considered long-term core investments and were not anticipated to be profitable for a period of time. IPR&D projects which were valued using an income approach, measured the returns attributable to each specific IPR&D project, discounted to present value using a risk-adjusted rate of return, including as appropriate, any tax benefits derived from amortizing the intangible assets for tax purposes. Significant estimates and assumptions inherent in the valuations reflect consideration of other marketplace participants, and include the amount and timing of future cash flows (including expected growth rates and profitability), the underlying product life cycles, economic barriers to entry, a brand’s relative market position and the discount rate applied to the cash flows, among others.

If actual results differ from the estimates and judgments used in these estimates, the amounts recorded in the financial statements could result in a possible impairment of the intangible assets and goodwill, or require acceleration of the amortization expense of finite-lived intangible assets.

Property, Plant and Equipment

Property, plant and equipment are stated at cost. The Company’s cost basis includes certain assets acquired in business combinations that were initially recorded at fair value as of the date of acquisition. Depreciation is computed over the estimated useful lives of the related asset type or term of the operating lease using the straight-line method for financial statement purposes. Maintenance and repairs are charged to expense as incurred and the costs of additions and betterments that increase the useful lives of the assets are capitalized.

The estimated service lives for property and equipment is as follows:

	Estimated
	Useful Lives
Buildings and leasehold improvements	7 to 39 years
Machinery and equipment	5 to 8 years
Transportation vehicles	5 years
Furniture and fixtures	7 years
Computers and computer software	3 years

Impairment of Goodwill, Other Intangible and Long-Lived Assets

Goodwill

Goodwill is the excess of the purchase price over the fair value of identifiable net assets acquired in business combinations accounted for under the purchase method. Goodwill is not amortized but is tested for impairment using a two-step method on an annual basis in the fourth quarter or whenever events or changes in circumstances indicate that the carrying value may not be recoverable. These indicators would include a significant change in operating performance, the business climate, legal factors, competition, or a planned sale or disposition of a significant portion of the business among other factors.

The recoverability of goodwill is measured at the reporting unit level by comparing the reporting unit’s carrying amount, including goodwill, to the fair market value of the reporting unit. A reporting unit is an operating segment or a business unit one level below that operating segment, and it is the level at which management regularly reviews operating results and makes resource allocation decisions.

Step one is the identification of potential impairment. This involves comparing the fair value of each reporting unit with its carrying amount, including goodwill. If the fair value of a reporting unit exceeds the carrying amount, the goodwill of the reporting unit is considered not impaired and the second step of the impairment test is unnecessary. If the carrying amount of a reporting unit exceeds its fair value, the second step of the impairment test is performed to measure the amount of impairment loss, if any.

Step two is the measurement of the amount of impairment loss. This involves comparison of the implied fair value of the reporting unit goodwill with the carrying amount of that goodwill. If the carrying amount of the reporting unit goodwill exceeds the implied fair value of that goodwill, an impairment loss would be recognized in an amount equal to that excess. The loss recognized cannot exceed the carrying amount of the goodwill. Once a goodwill impairment loss is recognized, the adjusted carrying amount becomes the accounting basis.

The fair value of goodwill is tested for impairment on a non-recurring basis in the accompanying consolidated financial statements using Level 3 inputs. The Company’s estimate of fair value was primarily determined using the income approach methodology of valuation that includes the discounted cash flow method as well as other generally accepted valuation methodologies to determine the fair value of the assets. Changes in economic and operating conditions that occur after the annual impairment analysis or an interim impairment analysis that impact these assumptions may result in a future goodwill impairment charge.

Other Intangibles and Long-lived Assets

Finite-lived intangible assets resulting from business acquisitions or technology licenses purchased are amortized on a straight-line basis over their estimated useful lives. The useful lives of acquisition-related intangible assets represent the point where over 90% of realizable undiscounted cash flows for each intangible asset are recognized. The assigned useful lives are consistent with the Company’s historical experience with similar technology and other intangible assets owned by the Company. The useful life of technology licenses is usually based on the term of the agreement.

In-process research and development is recorded at fair value as of the date of acquisition as an indefinite-lived intangible asset until the completion or abandonment of the associated research and development efforts or impairment. Upon completion of development, acquired in-process research and development assets are transferred to finite-lived intangible assets and amortized over their useful lives.

The Company reviews indefinite-lived intangible assets for impairment on an annual basis in conjunction with goodwill or whenever events or changes in circumstances indicate the carrying value may not be recoverable. Recoverability of indefinite-lived intangible assets is measured by comparing the carrying amount of the asset to the future discounted cash flows the asset is expected to generate.

Fair Value Measurements

When determining the fair value measurements for assets and liabilities required or permitted to be recorded at fair value, the Company considers the principal or most advantageous market in which it would transact and considers assumptions that market participants would use when pricing the asset or liability, such as inherent risk, transfer restrictions, and risk of nonperformance. The Company uses the following three levels of inputs in determining the fair value of the Company’s assets and liabilities, focusing on the most observable inputs when available:

Level 1 - Quoted prices in active markets for identical assets or liabilities.

Level 2 - Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets with insufficient volume or infrequent transactions (less active markets); or model-derived valuations in which all significant inputs are observable or can be derived principally from or corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3 - Unobservable inputs to the valuation methodology that are significant to the measurement of fair value of assets or liabilities.

To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes, the level in the fair value hierarchy within which the fair value measurement is disclosed is determined based on the lowest level input that is significant to the fair value measurement.

Interest Rate Derivative

The Company incurs interest expense through its variable rate debt. To manage its interest rate risk, the Company occasionally hedges the future cash flows of its variable rate debt, principally through interest rate contracts with major financial institutions. Interest rate contracts that meet specific criteria are accounted for as cash flow hedges.

The Company’s objective in using interest rate contracts is to add stability to interest expense and to manage its exposure to interest rate movements. To accomplish this objective, the Company uses interest rate contracts as part of its interest rate risk management strategy. Interest rate cap contracts involve the receipts of variable amounts from a counterparty when one-month LIBOR exceeds the capped interest rate in exchange for an upfront payment from the Company, capping the Company’s one-month LIBOR floating interest payments at the strike rate on its interest rate cap contract.

The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive income and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. The upfront payment the Company paid for the interest rate cap agreement will be amortized out of accumulated other comprehensive income and recorded as interest expense according to the amortization schedule created at inception of the hedging relationship. The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings. The Company records derivative instruments in the statements of cash flows to operating, investing, or financing activities consistent with the cash flows of the hedged item.

The assessment of effectiveness is based on the total changes in an option’s cash flows such that the assessment will include the interest rate caps entire change in fair value. The interest rate cap is considered a highly effective hedge since the key features and terms match with the hedged item at inception. Key features and terms are notional amount, cap effective date, rate threshold, index, repricing dates, payments dates, and maturity dates.

Revenue Recognition

The Company recognizes product revenue when persuasive evidence of an arrangement exists, delivery has occurred, the fee is fixed or determinable and collectability is probable. Recovery of costs associated with product design and engineering services are recognized during the period in which services are performed. The product design and engineering recovery, when recognized, will be reported as a reduction to product development and engineering expense. Historically, these recoveries have not exceeded the cost of the related development efforts.

The Company includes revenue related to granted technology licenses as part of “Net sales.” Historically, revenue from these arrangements has not been significant though it is part of its recurring ordinary business. In the third quarter of fiscal year 2013, the Company entered into a single licensing arrangement that resulted in the recognition of $7.5 million of revenue.

The Company defers revenue recognition on shipment of products to certain customers, principally distributors, under agreements which provide for limited pricing credits or return privileges, until these products are sold through to end-users or the return privileges lapse. For sales subject to certain pricing credits or return privileges, the amount of future pricing credits or inventory returns cannot be reasonably estimated given the relatively long period in which a particular product may be held by the customer. Therefore, the Company has concluded that sales to customers under these agreements are not fixed and determinable at the date of the sale and revenue recognition has been deferred. The Company estimates the deferred gross margin on these sales by applying an average gross profit margin to the actual gross sales. The average gross profit margin is calculated for each category of material using standard costs which is expected to approximate actual costs at the date of sale. The estimated deferred gross margins on these sales, where there are no outstanding receivables, are recorded on the consolidated balance sheets under the heading of “Deferred revenue.”

The Company records a provision for estimated sales returns in the same period as the related revenues are recorded. The Company bases these estimates on historical sales returns and other known factors. Actual returns could be different from Company estimates and current provisions for sales returns and allowances, resulting in future charges to earnings. There were no significant impairments of deferred cost of sales in fiscal year 2013 or fiscal year 2012.

The following table summarizes the deferred revenue balance:

(in thousands)	January 27, 2013		January 29, 2012
Deferred revenues	$	4,467	$	4,964
Deferred cost of revenues	1,099		1,243
Deferred revenue, net	3,368		3,721
Deferred product design and engineering recoveries	377		132
Total deferred revenue	$	3,745	$	3,853

Cost of Sales

Cost of sales includes materials, depreciation on fixed assets used in the manufacturing process, shipping costs, direct labor and overhead.

Sales and Marketing

The Company expenses sales and marketing costs, which include advertising costs, as they are incurred. Advertising costs were $119,000, $285,000 and $232,000 for fiscal years 2013, 2012 and 2011, respectively.

Product Development and Engineering

Product development and engineering costs are charged to expense as incurred. Recoveries from nonrecurring engineering services are recorded as an offset to product development expense incurred in support of this effort since these activities do not represent an earnings process core to the Company’s business and serve as a mechanism to partially recover development expenditures.

The Company received approximately $12.5 million, $5.7 million and $11.7 million in fiscal years 2013, 2012 and 2011, respectively for nonrecurring engineering services.

Income Taxes

The Company accounts for income taxes using the asset and liability method. Under this method, deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts and their respective tax bases. The consolidated balance sheets include current and long term prepaid taxes under “Prepaid taxes” and “Other assets” and current and long term liabilities for uncertain tax positions under “Accrued liabilities” and “Other long-term liabilities.”

As part of the process of preparing the Company’s consolidated financial statements, the Company estimates income taxes in each of the jurisdictions in which it operates. This process involves estimating the current tax liability together with assessing temporary differences resulting from differing treatment of items for tax and accounting purposes. These differences result in deferred tax assets and liabilities. The Company must assess the likelihood that its deferred tax assets will be recovered from future taxable income and, to the extent the Company believes that recovery is not likely, it must establish a valuation allowance. To the extent the Company changes its valuation allowance in a period; the change is generally recorded through the tax provision on the consolidated statements of income.

The income tax effects of share-based payments are recognized for financial reporting purposes only if such awards are expected to result in a tax deduction. The Company does not recognize a deferred tax asset for an excess tax benefit (that is, a tax benefit that exceeds the tax benefit for the amount of compensation cost recognized for the award for financial reporting purposes) that has not been realized. In determining when an excess tax benefit is realized, the Company has elected to follow the ordering provision of the tax law.

For intra-entity differences between the tax basis of an asset in the buyer’s tax jurisdiction and their cost as reported in the consolidated financial statements, the Company does not recognize a deferred tax asset. Income taxes paid on intra-entity profits on assets remaining within the group are accounted for as prepaid taxes. See Note 14 for further discussion of income taxes.

Accumulated Other Comprehensive Income

Other comprehensive income includes unrealized gains and losses on available-for-sale investments, unrealized loss on interest rate hedging activities and foreign currency translation adjustments, net of tax. This information is provided in our consolidated statements of comprehensive Income. Accumulated other comprehensive income balances were as follows:

(in thousands)	Unrealized holding gain (loss) on available-for-sale investments (1)			Unrealized loss on interest rate hedge			Cumulative translation adjustment			Accumulated other comprehensive income
Balance at January 31, 2010	$	317		$	—		$	501		$	818
Current-period other comprehensive (loss) income	(76		)	—			1			(75		)
Balance at January 30, 2011	241			—			502			743
Current-period other comprehensive loss	(204		)	—			(4		)	(208		)
Balance as of January 29, 2012	37			—			498			535
Current-period other comprehensive (loss) income	(32		)	(353		)	203			(182		)
Balance as of January 27, 2013	$	5		$	(353	)	$	701		$	353

(1) Net of reclassification adjustments for gains realized, net of tax from other comprehensive income to net income $1 and $5 for the fiscal years 2013 and 2012, respectively. There were no reclassification adjustments for gains realized in fiscal year 2011.

Translation

The assets and liabilities of the Company’s foreign subsidiaries that operate in a local currency environment, where that local currency is the functional currency, are translated to the U.S. dollar using exchange rates in effect at the balance sheet date. Income statement items are translated at average exchange rates prevailing during the period. The translation gains or losses are included as a component of accumulated other comprehensive income in the accompanying consolidated financial statements.

Transaction gains and losses resulting from the re-measurement or settlement of assets and liabilities denominated in foreign currencies are included in the determination of net income and have not been significant.

Stock-Based Compensation

The Company has various equity award plans (“Plans”) that provide for granting stock based awards to employees and non-employee directors of the Company. The Plans provide for the granting of several available forms of stock compensation. As of January 27, 2013, the Company has granted stock option awards (“Options”) and restricted stock unit awards (“RSU”) under the Plans and has also issued some stock-based compensation outside of any plan, including options and restricted stock awards issued as inducements to join the Company.

Earnings per Share

The computation of basic and diluted earnings per common share was as follows:

	Fiscal Year Ended
(in thousands, except per share amounts)	January 27, 2013		January 29, 2012		January 30, 2011
Net income	$	41,939	$	89,087	$	72,572
Weighted average common shares outstanding - basic	65,809		65,099		62,339
Dilutive effect of employee equity incentive plans	1,663		2,251		2,184
Weighted average common shares outstanding - diluted	67,472		67,350		64,523
Basic earnings per common share	$	0.64	$	1.37	$	1.16
Diluted earnings per common share	$	0.62	$	1.32	$	1.12
Anti-dilutive shares not included in the above calculations	783		625		1,700

Basic earnings per common share is computed by dividing income available to common shareholders by the weighted-average number of shares of common stock outstanding during the reporting period. Diluted earnings per common share incorporates the incremental shares issuable, calculated using the treasury stock method, upon the assumed exercise of stock options and the vesting of restricted stock.

Contingencies

The Company accrues an undiscounted liability for contingencies where the incurrence of a loss is probable and the amount can be reasonably estimated, and the Company discloses the amount accrued and the amount of a reasonably possible loss in excess of the amount accrued, if such disclosure is necessary for our financial statements not to be misleading. The Company does not record liabilities when the likelihood that the liability has been incurred is probable but the amount cannot be reasonably estimated, or when the liability is believed to be only reasonably possible or remote.

Because litigation outcomes are inherently unpredictable, the Company’s evaluation of legal proceedings often involves a series of complex assessments by management about future events and can rely heavily on estimates and assumptions. If the assessments indicate that loss contingencies that could be material to any one of our financial statements are not probable, but are reasonably possible, or are probable, but cannot be estimated, then the Company discloses the nature of the loss contingencies, together with an estimate of the range of possible loss or a statement that such loss is not reasonably estimable.

Subsequent Events

The Company evaluates all events through the issuance date of the consolidated financial statements to determine whether any subsequent events have occurred that require recognition or disclosure.

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Acquisitions - Business Acquisition, Pro Forma Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012
Revenue	$ 603,067	$ 604,906
Net income	$ 56,980	$ 66,377

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Interest Rate Derivative Agreement - Narrative (Details) (USD $)	0 Months Ended	12 Months Ended
	Jun. 20, 2012	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Interest rate cap, notional amount	$ 175,000,000
Payment of interest rate cap	1,100,000	1,100,000	0	0
Description of variable rate basis		one-month LIBOR
Interest rate cap, rate	1.00%
Interest rate cash flow hedge loss expected to be reclassified during next 12 months		$ 78,000

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Commitments and Contingencies - Schedule of Liability for Deferred Compensation (Details) (USD $) In Thousands, unless otherwise specified	Jan. 27, 2013	Jan. 29, 2012
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Accrued liabilities	$ 1,410	$ 901
Deferred Compensation Plan For Officers And Executives [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Accrued liabilities	530	901
Other long-term liabilities	13,396	10,222
Total deferred compensation liabilities under this plan	$ 13,926	$ 11,123

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Property, Plant and Equipment - Summary of Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	Jan. 27, 2013	Jan. 29, 2012
Property, Plant and Equipment [Abstract]
Property, gross	$ 9,050	$ 5,991
Buildings and improvements, gross	18,627	18,580
Leasehold improvements, gross	8,881	5,768
Machinery and equipment, gross	130,595	98,895
Furniture and fixtures, gross	30,120	23,428
Construction in progress, gross	6,330	2,444
Property, plant and equipment, gross	203,603	155,106
Less accumulated depreciation and amortization	(101,766)	(85,393)
Property, plant and equipment, net	$ 101,837	$ 69,713

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Recent Accounting Pronouncements

12 Months Ended

Jan. 27, 2013

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

Recent Accounting Pronouncements

Recent Accounting Pronouncements

In February 2013, the FASB issued an accounting standards update regarding the reporting of reclassifications out of accumulated other comprehensive income. This update, which will be effective prospectively for reporting periods beginning after December 15, 2012, requires disclosure of amounts reclassified out of accumulated other comprehensive income by component. In addition, an entity is required to present either on the face of the statement of operations or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income but only if the amount reclassified is required to be reclassified to net income in its entirety in the same reporting period. For amounts not reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures that provide additional detail about those amounts. The Company will adopt the disclosure requirements of this update for the quarter ending April 28, 2013.

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Stock Repurchase Program And Shares Withheld From Vested Restricted Shares - Summary of Stock Repurchase Activities and Shares Withheld from Vested Restricted Shares during Period (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Equity, Class of Treasury Stock [Line Items]
Repurchases, shares	273,139	2,279,526	164,636
Repurchases, value	$ 7,769	$ 50,665	$ 2,819
Shares repurchased under the 2008 program
Equity, Class of Treasury Stock [Line Items]
Repurchases, shares	263,443	2,252,099	74,702
Repurchases, value	7,500	50,000	1,258
Shares withheld from vested restricted shares
Equity, Class of Treasury Stock [Line Items]
Repurchases, shares	9,696	27,427	89,934
Repurchases, value	$ 269	$ 665	$ 1,561

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Goodwill and Intangible Assets - Schedule of Finite-lived Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified													12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 27, 2013 Developed technology	Jan. 29, 2012 Developed technology	Jan. 27, 2013 Customer relationships	Jan. 29, 2012 Customer relationships	Jan. 27, 2013 Technology license		Jan. 29, 2012 Technology license		Jan. 27, 2013 Other intangible assets	Jan. 29, 2012 Other intangible assets	Jan. 27, 2013 Minimum Developed technology	Jan. 27, 2013 Minimum Customer relationships	Jan. 27, 2013 Minimum Technology license	Jan. 27, 2013 Minimum Other intangible assets	Jan. 27, 2013 Maximum Developed technology	Jan. 27, 2013 Maximum Customer relationships	Jan. 27, 2013 Maximum Technology license	Jan. 27, 2013 Maximum Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Estimated useful life													2 years	7 years	5 years	1 year	10 years	10 years	10 years	5 years
Gross Carrying Amount	$ 228,618	$ 81,030	$ 173,724	$ 65,900	$ 40,130	$ 12,130	$ 8,164	[1]	$ 3,000	[1]	$ 6,600	$ 0
Accumulated Amortization	(54,260)	(24,210)	(40,867)	(21,031)	(7,736)	(2,929)	(1,056)	[1]	(250)	[1]	(4,601)	0
Net Carrying Amount	$ 174,358	$ 56,820	$ 132,857	$ 44,869	$ 32,394	$ 9,201	$ 7,108	[1]	$ 2,750	[1]	$ 1,999	$ 0

[1] Technology licenses relate to licensing agreements entered into by the Company. Amortization expense related to technology licenses is reported as “Product development and engineering” in the consolidated statements of income.

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Accrued Liabilities (Tables)

12 Months Ended

Jan. 27, 2013

Payables and Accruals [Abstract]

Summary of accrued liabilities

The following is a summary of accrued liabilities for fiscal years 2013 and 2012:

(in thousands)	January 27, 2013		January 29, 2012
Compensation	$	23,140	$	14,330
Equity awards accounted for as a liability	3,241		3,988
Deferred compensation	1,410		901
Accrued sales and marketing expenses	3,202		1,742
Accrued professional fees	3,835		1,949
Accrued interest expense	1,177		—
Income taxes payable	4,113		4,260
Accrued taxes	266		437
Other	8,892		4,782
	$	49,276	$	32,389

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Stock-Based Compensation

12 Months Ended

Jan. 27, 2013

Share-based Compensation [Abstract]

Stock-Based Compensation

Stock-Based Compensation

Financial Statement Effects and Presentation. The following table shows total pre-tax, stock-based compensation expense included in the consolidated statements of income for fiscal years 2013, 2012 and 2011.

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Cost of sales	$	1,218		$	983		$	1,802
Selling, general and administrative	14,965			15,839			19,310
Product development and engineering	8,345			7,198			7,898
Stock-based compensation, pre-tax	$	24,528		$	24,020		$	29,010
Net change in stock-based compensation capitalized into inventory	$	(33	)	$	(83	)	$	(116	)

The below table summarizes the net impact of stock-based compensation, after tax, on net income for fiscal years 2013, 2012 and 2011.

	Fiscal Year Ended
(in thousands)	January 27, 2013			January 29, 2012			January 30, 2011
Stock-based compensation	$	24,528		$	24,020		$	29,010
Associated tax effect	(5,120		)	(5,693		)	(9,170		)
Net effect on net income	$	19,408		$	18,327		$	19,840

The tax benefit realized from option exercise activity for fiscal years 2013, 2012 and 2011 was $14.3 million, $12.9 million and $7.1 million, respectively.

Share-based Payment Arrangements

The Company has various equity award plans that provide for granting stock-based awards to employees and non-employee directors of the Company. The plans provide for the granting of several available forms of stock compensation. As of January 27, 2013, the Company has granted options and restricted stock under the plans and has also issued some stock-based compensation outside of the plans, including options and restricted stock issued as inducements to join the Company.

Grant Date Fair Values and Underlying Assumptions; Contractual Terms

The Company uses the Black-Scholes pricing model to value options. For awards classified as equity, stock-based compensation cost is measured at grant date, based on the fair value of the award, and is recognized as an expense over the employee’s or director’s requisite service period. For awards classified as liabilities, stock-based compensation cost is measured at fair value at the end of each reporting date until the date of settlement, and is recognized as an expense over the employee’s or director’s requisite service period. Expected volatilities are based on historical volatility using daily and monthly stock price observations.

The following table summarizes the assumptions used in the Black-Scholes model to determine the fair value of options granted in fiscal years 2013, 2012 and 2011:

	Fiscal Year Ended
	January 27, 2013	January 29, 2012	January 30, 2011
Expected lives, in years	4.4 - 4.6	4.4 - 4.7	4.3 - 5.1
Estimated volatility	38% - 41%	40% - 41%	39% - 40%
Dividend yield	—	—	—
Risk-free interest rate	0.66% - 0.73%	0.71% - 1.8%	1.2% - 2.3%
Weighted average fair value on grant date	$9.52	$8.43	$6.56

The estimated fair value of restricted stock awards was calculated based on the market price of the Company’s common stock on the date of grant. Some of the restricted stock units awarded in fiscal year 2013 and prior years are classified as liabilities rather than equity. For awards classified as liabilities, the value of these awards is re-measured at the end of each quarter.

Stock Option Awards. The Company has historically granted stock option awards to both employees and non-employee directors. The grant date for these awards is equal to the measurement date. These awards were valued as of the measurement date and are amortized over the requisite vesting period (typically 3-4 years). A summary of the activity for stock option awards for fiscal years 2013, 2012 and 2011 is presented below:

(in thousands, except for per share amounts)	Number of Shares		Weighted Average Exercise Price (per share)		Aggregate Intrinsic Value (1)		Aggregate Unrecognized Compensation		Number of Shares Exercisable	Weighted Average Contractual Term (years)
Balance at January 31, 2010	9,151		$	16.44	$	8,998	$	9,436	6,302
Options granted	403		17.61
Options exercised	(2,329	)	14.22		11,495
Options cancelled/forfeited	(603	)	21.35
Balance at January 30, 2011	6,622		16.84		35,492		7,067		5,160
Options granted	343		24.05
Options exercised	(2,781	)	16.64		22,537
Options cancelled/forfeited	(494	)	22.30
Balance at January 29, 2012	3,690		16.94		44,435		4,699		2,767
Options granted	258		28.21
Options exercised	(1,254	)	15.70		14,508
Options cancelled/forfeited	(115	)	25.30
Balance at January 27, 2013	2,579		$	18.29	$	29,789	$	3,817	1,937
Exercisable at January 27, 2013	1,937		$	16.51	$	25,822				2.1
Vested and expected to vest after January 27, 2013	2,495		$	18.10	$	29,293				2.6

(1) Represents the difference between the exercise price and the value of the Company’s stock at the time of exercise, for exercised grants. For outstanding awards, represents the difference between the exercise price and the value of the Company’s stock at fiscal year end.

The following table summarizes information about stock options outstanding at January 27, 2013.

(number of shares in thousands)	Number of Shares	Weighted Average Exercise Price (per share)		Weighted Average Contractual Term (years)
Price Range Analysis - Outstanding
$1.15 - $4.53	9	$	2.52	4.3
$7.79 - $13.15	247	11.59		2.1
$13.76 - $20.90	1,671	16.58		2.1
$21.02 - $29.68	652	25.43		4.4
Total outstanding	2,579	$	18.29	2.7
Price Range Analysis - Exercisable
$1.15 - $4.53	9	$	2.52	4.3
$7.79 - $13.15	241	11.62		2.0
$13.76 - $20.90	1,494	16.52		2.0
$21.02 - $29.68	193	23.18		2.8
Total exercisable	1,937	$	16.51	2.1

The following table summarizes information regarding unvested stock option awards at January 27, 2013:

(in thousands, except for per share amounts)	Number of Shares		Weighted Average Exercise Price (per share)		Weighted Average Grant Date Fair Value (per share)		Weighted Average Remaining Expense Period (years)	Total Fair Value
Balance at January 31, 2010	2,849		$	13.31	$	7.48	1.9	$	21,311
Options granted	403		17.61		6.56			2,644
Options vested	(1,575	)	13.07		8.26			13,006
Options forfeited	(215	)	11.57		8.56			1,845
Balance at January 30, 2011	1,462		15.00		6.23		1.9	$	9,103
Options granted	343		24.05		8.43			2,893
Options vested	(650	)	14.30		6.33			4,115
Options forfeited	(231	)	16.59		6.39			1,479
Balance at January 29, 2012	924		18.47		6.99		1.8	$	6,452
Options granted	258		28.21		9.52			2,457
Options vested	(484	)	16.42		6.49			3,144
Options forfeited	(56	)	21.69		7.74			432
Balance at January 27, 2013	642		$	23.66	$	8.31	1.9	$	5,333

Restricted Stock. The Company has not granted any restricted stock to employees since fiscal year 2009. The grant date for these awards is equal to the measurement date. These awards are valued as of the measurement date and recognized as compensation expense over the requisite vesting period (typically 3-4 years).

The following table summarizes the activity for restricted stock awards for fiscal years 2013, 2012 and 2011:

(in thousands, except for per share amounts)	Number of Shares		Weighted Average Grant Date Fair Value (per share)		Aggregate Intrinsic Value (1)		Aggregate Unrecognized Compensation		Weighted Average Period Over Which Expected to be Recognized (in years)
Balance at January 31, 2010	418		$	15.15			$	3,193	1.2
Restricted stocks granted	—
Restricted stocks vested	(270	)	17.33		$	4,678
Restricted stocks cancelled	(13	)	17.44
Balance at January 30, 2011	135		14.44				984		0.8
Restricted stocks granted	—
Restricted stocks vested	(91	)	14.29		2,201
Restricted stocks cancelled	(12	)	15.25
Balance at January 29, 2012	32		14.57				81		0.1
Restricted stocks granted	—
Restricted stocks vested	(32	)	14.57		$	902
Restricted stocks cancelled	—
Balance at January 27, 2013	—		$	—			$	—	—

(1) Represents the value of Semtech stock on the date that the restricted stock vested.

Performance Units. The Company grants performance-based vesting restricted stock units to select employees. These awards have a performance condition in addition to a service condition. The performance condition generally relates to the Company’s revenue and operating income measured against internal goals. Under the terms of these awards, assuming the highest level of performance with no cancellations due to forfeitures, the maximum number of shares that can be earned in the aggregate is 696,400. In this scenario, the maximum number of shares that could be issued thereunder would be 353,200 and the Company would have a liability accrued in the consolidated balance sheet equal to the value of 343,200 shares on the settlement date, which would be settled in cash. Only cash performance unit awards are classified as liabilities and the value of these awards is re-measured at each reporting date. At January 27, 2013, 85% of the units from the fiscal year 2009 grant vested and 200% of the units from the fiscal year 2010 grant are expected to vest. At January 27, 2013, the performance metrics associated with the outstanding awards issued in fiscal years 2013, 2012 and 2011 are expected to be met at a level which would result in a grant at 100%, 108%, and 200% of target, respectively.

The following table summarizes the activity for performance units during fiscal years 2013, 2012 and 2011:

			Subject to Share Settlement		Subject to Cash Settlement					Weighted  Average Grant Date		Aggregate		Period Over Which Expected
(in thousands, except for per share amounts)	Total Units		Units		Units		Recorded Liability			Fair Value (per share)		Unrecognized Compensation		to be Recognized (in years)
Balance at January 31, 2010	593		363		230		$	259		$	14.29	$	580	1.3
Performance units granted	143		72		71					16.68
Performance units vested	—		—		—		—			—
Performance units cancelled/forfeited	(180	)	(109	)	(71	)				16.28
Change in liability							3,666			—
Balance at January 30, 2011	556		326		230		3,925			14.26		7,971		1.0
Performance units granted	117		59		58					23.33
Performance units vested	(218	)	(157	)	(61	)	(1,335		)	14.74
Performance units cancelled/forfeited	(95	)	(48	)	(47	)				15.26
Change in liability							3,444
Balance at January 29, 2012	360		180		180		6,034			16.65		4,829		1.0
Performance units granted	144		77		67					29.30
Performance units vested	(144	)	(72	)	(72	)	(4,172		)	11.92
Performance units cancelled/forfeited	(7	)	(4	)	(3	)				29.35
Change in liability							2,560
Balance at January 27, 2013	353		181		172		$	4,422		$	23.50	$	4,754	1.1

Stock Units, Employees. The Company issues stock unit awards to employees which are expected to be settled with stock. The grant date for these awards is equal to the measurement date. These awards are valued as of the measurement date and amortized over the requisite vesting period (typically 4 years). The following table summarizes the stock unit award activity for fiscal years 2013, 2012 and 2011:

(in thousands, except per share amount)	Number of Units		Weighted Average Grant Date Fair Value (per unit)		Aggregate Intrinsic Value (1)		Aggregate Unrecognized Compensation		Weighted Average Period Over Which Expected to be Recognized (in years)
Balance at January 31, 2010	1,410		$	15.72			$	17,713	3.4
Stock units granted	1,181		17.62
Stock units vested	(404	)	19.20		$	7,749
Stock units forfeited	(129	)	19.50
Balance at January 30, 2011	2,058		16.70				29,763		2.7
Stock units granted	810		22.74
Stock units vested	(627	)	16.61		14,333
Stock units forfeited	(259	)	17.75
Balance at January 29, 2012	1,982		19.06				31,472		2.4
Stock units granted	1,517		26.73
Stock units vested	(699	)	18.20		$	18,438
Stock units forfeited	(242	)	23.65
Balance at January 27, 2013	2,558		$	23.41			$	49,374	2.5

(1) Reflects the value of Semtech stock on the date that the stock unit vested.

Stock Units, Non-Employee Directors. The Company grants stock unit awards to non-employee directors. These restricted stock units are accounted for as liabilities and accrued in the consolidated balance sheets because they are cash settled. These awards are vested after 1 year of service. However, because these awards are not typically settled until a non-employee director’s separation from service, the value of these awards is re-measured at the end of each reporting period until settlement. The following table summarizes the activity for stock unit awards for fiscal years 2013, 2012 and 2011:

(in thousands, except per share amount)	Number of Units		Recorded Liability		Weighted Average Grant Date Fair Value (per unit)		Aggregate Unrecognized Compensation		Period Over Which Expected to  be Recognized (in years)
Balance at January 31, 2010	35		$	1,389	$	16.18	$	232	0.4
Stock units granted	30				16.43
Stock units vested	(35	)			16.18
Stock units forfeited	—
Change in liability			1,025
Balance at January 30, 2011	30		2,414		16.43		269		0.4
Stock units granted	18				27.60
Stock units vested	(30	)			16.43
Stock units forfeited	—
Change in liability			1,459
Balance at January 29, 2012	18		3,873		27.60		216		0.4
Stock units granted	20				24.46
Stock units vested	(18	)			27.60
Stock units forfeited	—
Change in liability			684
Balance at January 27, 2013	20		$	4,557	$	24.46	$	253	0.4

As of January 27, 2013, the total number of vested but unsettled stock units for Non-Employee Directors is 141,155 units which are included in the recorded liability.

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Income Taxes - Reconciliation of Gross Unrecognized Tax Benefits (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Beginning balance	$ 13,759	$ 17,011	$ 13,795
Additions based on tax positions related to the current year	695	835	449
Additions for tax positions of prior years	0	0	3,592
Reductions for tax positions of prior years	(647)	(4,087)	0
Reductions for settlements with tax authorities	(663)	0	(825)
Ending balance	$ 13,144	$ 13,759	$ 17,011