10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

Form 10-K

(Mark One)

ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 28, 2013

or

¨ 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: 001-35623

__________________________________________

PEREGRINE SEMICONDUCTOR CORPORATION

(Exact Name of Registrant as Specified in its Charter)

__________________________________________

Delaware	86-0652659
(State or Other Jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification No.)
9380 Carroll Park Drive San Diego, California	92121
(Address of Principal Executive Offices)	(Zip Code)

(858) 731-9400

(Registrant’s Telephone Number, Including Area Code)

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 $0.001 per share	The NASDAQ Stock Market LLC

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

None

 __________________________________________

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

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

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  ý    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  ý    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 the 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.  ý

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 definitions of “large accelerated filer”, “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

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

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Securities Exchange Act of 1934).    Yes  ¨    No  ý

As of June 28, 2013, the last business day of the registrant’s most recently completed second quarter, the aggregate market value of the registrant’s common stock held by non-affiliates of the registrant was approximately $290.7 million based on the closing price of the registrant’s common stock as reported on the Nasdaq Global Market of $10.91 per share on June 28, 2013. Shares of common stock held by each executive officer and director and each person who beneficially owns 5% or more of the outstanding common stock have been excluded from this calculation. This determination of affiliate status may not be conclusive for other purposes.

The number of outstanding shares of the registrant’s common stock, par value $0.001 per share, as of February 12, 2014 was 33,055,714.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s proxy statement to be filed with the Securities and Exchange Commission pursuant to Regulation 14A in connection with the registrant’s 2014 Annual Meeting of Stockholders, which will be filed subsequent to the date hereof, are incorporated by reference into Part III of this Form 10-K. Such proxy statement will be filed with the Securities and Exchange Commission not later than 120 days following the end of the registrant’s fiscal year ended December 28, 2013.

Peregrine Semiconductor Corporation

ANNUAL REPORT ON FORM 10-K

FOR THE FISCAL YEAR ENDED DECEMBER 28, 2013

TABLE OF CONTENTS

		Page
PART I
Item 1.	Business	2
Item 1A.	Risk Factors	12
Item 1B.	Unresolved Staff Comments	31
Item 2.	Properties	31
Item 3.	Legal Proceedings	31
Item 4.	Mine Safety Disclosures	32
PART II
Item 5.	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchase of Equity Securities	33
Item 6.	Selected Financial Data	34
Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	36
Item 7A.	Quantitative and Qualitative Disclosures About Market Risk	47
Item 8.	Financial Statements and Supplementary Data	48
Item 9.	Changes in and Disagreements With Accountants on Accounting and Financial Disclosure	48
Item 9A.	Controls and Procedures	48
Item 9B.	Other Information	48
PART III
Item 10.	Directors, Executive Officers and Corporate Governance	49
Item 11.	Executive Compensation	49
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	49
Item 13.	Certain Relationships and Related Transactions, and Director Independence	49
Item 14.	Principal Accounting Fees and Services	49
PART IV
Item 15.	Exhibits, Financial Statement Schedules	50

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Cautionary Statement Regarding Forward-Looking Information

All statements included or incorporated by reference in this Annual Report on Form 10-K, other than statements or characterizations of historical fact, are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. These forward-looking statements are based on our current expectations, estimates and projections about our industry and business, management’s beliefs, and certain assumptions made by us, all of which are subject to change. Forward-looking statements can often be identified by words such as “anticipates,” “expects,” “intends,” “plans,” “predicts,” “believes,” “seeks,” “estimates,” “may,” “will,” “should,” “would,” “could,” “potential,” “continue,” “ongoing,” similar expressions, and variations or negatives of these words. These statements are not guarantees of future performance and are subject to risks, uncertainties and assumptions that are difficult to predict. Such risks and uncertainties include, but are not limited to, our dependence on a limited number of customers for a substantial portion of our revenues; intellectual property risks; intense competition in our industry; our ability to develop and introduce new and enhanced products on a timely basis and achieve market acceptance of those products; consumer acceptance of our customers’ products that incorporate our solutions; our lack of long-term supply contracts and dependence on limited sources of supply; and potential decreases in average selling prices for our products. Therefore, our actual results could differ materially and adversely from those expressed in any forward-looking statements as a result of various factors, some of which are listed under the section entitled “Risk Factors” in Part I, Item 1A of this Report. These forward-looking statements speak only as of the date of this Report. We undertake no obligation to revise or update publicly any forward-looking statement to reflect future events or circumstances.

Unless the context otherwise requires, we use the terms “Peregrine,” the “company,” “we,” “us,” and “our” in this Report refer to Peregrine Semiconductor Corporation and its subsidiaries.

“Peregrine Semiconductor Corporation,” “Peregrine Semiconductor,” “Peregrine,” “UltraCMOS,” “HaRP,” “DuNE,” “STeP,” and other trademarks or service marks of Peregrine appearing in this Report are the property of Peregrine. This Report contains additional trade names, trademarks, and service marks of ours and of other companies. We do not intend our use or display of other companies’ trade names, trademarks, or service marks to imply a relationship with, or endorsement or sponsorship of us by, these other companies.

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PART I

Item 1. Business

Our Company

We are a fabless provider of high performance radio frequency integrated circuits, or RFICs. Our solutions leverage our proprietary UltraCMOS^® technology which enables the design, manufacture, and integration of multiple radio frequency, or RF, mixed signal, and digital functions on a single chip. We believe our products deliver an industry leading combination of performance and monolithic integration. Our solutions target a broad range of applications in the space and military, automotive, broadband, industrial, mobile device, test and measurement equipment, and wireless infrastructure markets. We have shipped over two billion RFICs based on our UltraCMOS technology.

Our UltraCMOS technology combines the ability to achieve the high levels of performance of traditional specialty processes, with the fundamental benefits of standard complementary metal oxide semiconductor, or CMOS, the most widely used semiconductor process technology. UltraCMOS technology utilizes ultra thin silicon on insulating substrate, providing greatly reduced unwanted electrical interaction between the RFIC and the substrate (referred to as parasitic capacitance), which enables high signal isolation and excellent signal fidelity with low distortion over a broad frequency range (referred to as broadband linearity). These two technical attributes result in RF devices with excellent high-frequency performance and power handling performance, and reduced crosstalk between frequencies. In addition, increased broadband linearity provides for faster data throughput and greater subscriber capacity over a wireless network, resulting in enhanced network efficiency. UltraCMOS technology also provides the benefits of standard CMOS, such as high levels of integration, low power consumption, reusable circuit libraries, widely available design tools and outsourced manufacturing capacity, and the ability to scale to smaller geometries. We own fundamental intellectual property, or IP in the UltraCMOS technology consisting of more than 170 U.S. and international issued and pending patents, and over 300 documented trade secrets covering basic circuit elements, RF circuit designs, manufacturing processes, and design know-how.

We leverage our extensive RF design expertise and systems knowledge to develop RFIC solutions that meet the stringent performance, integration, and reliability requirements of the rapidly evolving wireless markets. As of December 28, 2013, we offered a broad portfolio of more than 230 high performance RFICs including switches, digital attenuators, mixers / upconverters, prescalers, digitally tunable capacitors, or DTCs, phase-locked loops, or PLLs, and DC-DC converters, and we are developing power amplifiers, or PAs. During the year ended December 28, 2013, our products were sold to more than 1,700 module manufacturers, original equipment manufacturers, or OEMs, contract manufacturers, and other customers. We believe our RFICs are included in products sold by many of the leading mobile handset OEMs. Our net revenue was $202.3 million, $203.9 million, and $107.8 million for the year ended December 28, 2013, December 29, 2012, and December 31, 2011, respectively. We recorded a net loss of $4.1 million and $9.7 million for the years ended December 28, 2013 and December 31, 2011, respectively, and net income of $7.3 million for the year ended December 29, 2012. As of December 28, 2013, we had an accumulated deficit of $225.0 million.

Corporate Information

Peregrine Semiconductor Corporation (together with its subsidiaries, “Peregrine”, “the Company”, “our”, “we” or “us”) was incorporated in Delaware in February 1990 and founded by Mark Burgener, Rory Moore, and Ron Reedy. Our principal executive offices are located at 9380 Carroll Park Drive, San Diego, California 92121. Our telephone number is (858) 731-9400. Our website address is www.psemi.com. Information contained on our website is not incorporated by reference into this report, and you should not consider information contained on our website to be part of this report or in deciding whether to purchase shares of our common stock. Our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and amendments to reports filed or furnished pursuant to Sections 13(a) and 15(d) of the Securities Exchange Act of 1934, as amended, are available free of charge on the Investor Relations portion of our web site at www.psemi.com as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. We are an “emerging growth company” under the federal securities laws and will be subject to reduced public company reporting requirements.

Industry Overview

Wireless is Everywhere

Proliferation of wireless devices coupled with rapid advances in RF technologies have significantly enhanced wireless connectivity and revolutionized the mobile wireless, wireless infrastructure, broadband, and satellite communications markets. In addition, an array of other consumer, public safety, aerospace and defense and industrial markets are increasingly incorporating advanced RF functionality into a wide variety of applications.

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The following graphic shows the broad array of applications in which advanced, high performance RFICs are currently being deployed:

Growing worldwide demand for mobile wireless communications and mobile multimedia applications is driving the proliferation of mobile devices. The evolution of mobile wireless networks from predominantly voice-centric networks to advanced high-speed networks that deliver voice, video, and data, is enabling consumers to access bandwidth intensive rich media content on mobile devices through applications such as videoconferencing, streaming media, and interactive gaming. As a result, mobile devices have evolved from supporting only a single cellular standard, operating on two or three frequencies and utilizing a single antenna, to supporting multiple wireless protocols, supporting greater than 20 frequency bands and integrating multiple antennas.

The combination of an increasing global subscriber base, expansion of advanced wireless networks, and the proliferation of powerful devices offering high-speed wireless Internet access, has dramatically increased mobile data traffic. This increase in data traffic is straining the existing wireless network infrastructure. As a result, operators are expanding their network capacity by acquiring additional wireless spectrum, deploying more third generation, or 3G, base stations, extending coverage with small cell technologies to improve localized coverage, and introducing fourth generation, or 4G, technologies, such as Long Term Evolution, or LTE. The demand for global wireless connectivity is driving operators to deploy network infrastructure in new geographies.

In addition to the mobile wireless handset and infrastructure markets, high performance RFICs are increasingly being deployed in a variety of other wired and wireless market applications. The increasing data transfer requirements of broadband communications, satellite communications, and test and measurement equipment; the high reliability and radiation-hard performance requirements of aerospace and defense communications; and the ruggedness, high temperature, and electrostatic discharge, or ESD, tolerance of automotive and industrial applications have resulted in increased demand for high performance RFICs in these markets. Accordingly, advanced RF semiconductor solutions are evolving to deliver increased functionality, performance, and reliability across a broad array of markets while simultaneously achieving smaller form factors and lower cost per function.

Requirements of the RF Semiconductor Market

Significant market opportunities exist for RFIC suppliers that address the stringent requirements of wireless systems such as:

• Better Performance. Wireless systems require components that can consistently deliver better signal quality, higher data rates, lower noise and system interference, and less power consumption across a variety of operating conditions and applications. High performance RFICs must interoperate with other wireless system components to avoid performance issues such as dropped calls, slower than expected transfer rates and poor battery life.

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• Increasing Functionality. To enable higher data rates, compatibility with legacy networks, and simultaneous voice and data communications, wireless systems must support multiple protocols and frequency bands. This increases overall design complexity and can increase the number of components, size and power consumption of wireless systems. For example, smartphones often utilize as many as 10 frequency bands to support a variety of wireless protocols and require separate RF components for each band.

• Higher Reliability. Module manufacturers and OEMs demand that high performance RFICs perform reliably for long periods of time under a variety of conditions. In particular, manufacturers of wireless network infrastructure, and aerospace and defense products must meet stringent reliability standards that require specialized design, manufacturing, quality assurance, and testing processes.

• Smaller Form Factor and More Cost Effective Solutions. High performance RFICs must enable module manufacturers and OEMs to design wireless products with an increasingly smaller form factor while also reducing overall product cost, both of which require increasing levels of integration.

Challenges Facing RF Semiconductor Suppliers

The need for higher performance wireless solutions, combined with the increased demand for integrated components that reduce costs, overall power consumption and size, has put significant pressure on wireless component suppliers. A typical wireless device contains three primary subsystems – the digital baseband processor, the transceiver, and the RF front-end. Baseband processors, and more recently transceivers, are implemented in standard silicon-based CMOS. However, fundamental physical limitations of silicon have prevented standard silicon-based CMOS solutions from meeting the high frequency and power handling requirements of high performance RF front-ends. As a result, RF front-end semiconductor manufacturers have historically utilized specialty process technologies such as GaAs HBT, GaAs pHEMT, SiGe, or BiCMOS. While discrete RF components produced with these processes can attain sufficient levels of performance, these technologies face one or more of the following significant challenges:

• Inability to Monolithically Integrate. An RF front-end module consists of a number of discrete components, including PAs, low noise amplifiers, switches, filters, control interfaces, power regulators, diplexers and passive elements, most of which are manufactured using different specialty process technologies. As a result, traditional RFICs cannot monolithically integrate these discrete components, leading to RF front-end modules with higher component counts, greater system design complexity, larger overall form factor, and lower module yields. This inability to monolithically integrate also limits cost reduction opportunities.

• Lack of Digital Integration. As the digital content of the RF front-end increases and OEMs demand greater levels of configurability, the inability to monolithically integrate digital logic, memory, and other mixed-signal functions on an RFIC manufactured using specialty process technologies can limit performance improvements and reductions in device size, and result in a higher component count for the same functionality.

• Manufacturing Inefficiencies. These processes cannot take advantage of the existing high volume CMOS manufacturing infrastructure, which results in custom fabrication facilities limiting the ability to reduce cost and drive supply chain flexibility.

• Lack of Scalability. Manufacturing inefficiencies inherently limited the ability of these processes to scale to smaller geometries as compared to standard CMOS and therefore IC suppliers utilizing these process technologies are increasingly unable to achieve reductions in manufacturing costs and form factors, lower power consumption, or higher performance.

Advanced wireless system module manufacturers and OEMs continue to implement more complex system architectures to achieve higher levels of performance, which in turn requires them to seek out more integrated solutions that are beyond the capabilities of RFICs produced using specialty process technologies.

Our Solution

We design, develop, market, and sell high performance RFICs based on our proprietary UltraCMOS technology. Our UltraCMOS technology enables us to monolithically integrate multiple RF and mixed signal components and digital circuitry into high performance RFICs. Our UltraCMOS technology provides the fundamental benefits of standard CMOS including high levels of integration, low power consumption, reusable circuit libraries, widely available design tools and outsourced manufacturing capacity, and the ability to scale to smaller geometries. Furthermore, our UltraCMOS technology utilizes an insulating substrate, which enables the low parasitic capacitance, high signal isolation, and excellent broadband linearity required for high frequency and high power RF devices. As of December 28, 2013, we offered a broad portfolio of

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more than 230 high performance RFICs including switches, digital attenuators, mixers / upconverters, PLLs, prescalers, DTCs, and DC-DC converters, and we are developing PAs.

We leverage our extensive design and process expertise and systems knowledge to develop RFICs that meet the stringent performance, integration, and reliability requirements of the rapidly evolving wireless markets. For example, our monolithic RFICs enable smaller and more power efficient mobile devices. In the wireless base station market, our RFICs enable the management of multiple bands which are driven by growth in 3G and 4G wireless networking protocols.

The following graphic illustrates how a 3G antenna switch built using our UltraCMOS technology (shown on the left) is much smaller, eliminates the complexity of wirebonding, and integrates all functionality on a single chip, compared with a similar switch built using a typical GaAs based approach (shown on the right).

Products

Our broad product portfolio includes both highly integrated monolithic RFICs as well as discrete components. Our proprietary UltraCMOS technology enables us to integrate most RF functions as well as analog and digital circuits and high quality factor, or high Q, passive elements on a single chip. We believe we are able to deliver a unique combination of best-in-class RFIC performance, power consumption, monolithic integration, and size required by increasingly advanced wireless communications applications. Our ICs address a broad range of advanced product requirements in the aerospace and defense, broadband, industrial, mobile device, test and measurement equipment, and wireless infrastructure markets. The table below summarizes our product portfolio and target end markets.

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		End Market
Product families	Automotive	Space and Military	Broadband	Industrial	Mobile Devices	Test and Measurement	Wireless Infrastructure
RF Switches – Antenna					x
RF Switches – Broadband and General Purpose	x	x	x	x		x	x
Digital Attenuators		x	x	x		x	x
Phase-locked loop		x	x	x			x
Mixers / Upconverters			x	x		x	x
Prescalers		x	x	x			x
Digitally Tunable Capacitors			x	x	x	x	x
DC-DC Converters		x
Power Amplifiers					o

x = Product in production

o = Product sampling or in development

The following is a brief description of our product families:

• RF Switches – Antenna. RF Switches are utilized in the RF section of mobile devices to route RF signals between the antenna and the handset core, through one or more signal paths. As the design of the mobile device becomes more complex, more signal paths are required. Our portfolio of RF switches includes products that vary in complexity and performance depending on the design of the application. For mobile handsets, our existing switch products offer up to 16 RF signal paths with integrated digital bus support and onboard voltage regulation.

• RF Switches–Broadband and General Purpose. Our broadband and general purpose RF switches deliver an industry leading combination of broadband linearity, settling time, and isolation while routing RF signals to their respective transmit or receive paths. We believe these attributes are being used by the OEMs of LED and plasma digital televisions, or DTVs, set top box, cable infrastructure, test and measurement devices, and high performance wireless applications to replace legacy mechanical relays and GaAs-based designs.

• Digital Attenuators. We provide digital step attenuators that are used to control the amplitude of an RF or analog signal. These products include digital control circuitry integrated with an RF attenuator core and are used in 3G and 4G cellular base stations, repeaters, and point-to-point nodes. Our highly linear and configurable digital attenuators reduce design complexity by maintaining excellent performance in both intermediate frequency, or IF, and RF applications and over a range of supply voltages.

• Phase-locked loop (PLL). Our frequency PLLs provide an electronic system for generating any of a range of frequencies from a single fixed timebase or oscillator. Our PLLs provide low-power, ultra-low phase noise, programmable frequency PLLs for defense, broadband, industrial, and wireless infrastructure markets.

• Mixers / Upconverters. Our mixers / upconverters are used to translate encoded voice/data signals from one frequency to another to enable radio transmission. Our mixers / upconverters are incorporated into leading mixer modules and provide industry leading linearity, which is a key metric to maximizing wireless data transmission rates. These attributes are critical in 3G and 4G cellular base station designs.

• Prescalers. Our prescalers operate in the C, X, and Ku bands to divide the frequency of a wireless signal in order to extend the operating range of a PLL beyond its base capability. Our prescalers complement our frequency PLL line, providing our customers with a comprehensive design solution while significantly lowering power consumption.

• Digitally Tunable Capacitors. Our DTCs are designed to enable RF circuits to perform optimally at many different frequencies. Our products support a wide range of applications in a variety of end markets, including antenna and filter tuning, and impedance matching between circuits. We believe our DTC products are designed to offer an industry leading combination of power handling, performance, manufacturability, and small form factor.

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• DC-DC Converters. Our frequency-configurable DC-DC converters efficiently perform voltage conversion using a high frequency switching technique that minimizes system noise. Our DC-DC converters are designed to enable a distributed power management architecture designed for satellite applications, replacing inefficient drop out regulators and large central converters. This increases efficiency, reduces weight and form factor, and provides redundant power management.

• Power Amplifiers. Our PAs amplify RF signals in order to generate the necessary power required to establish a radio link between a base station and a mobile device. These products are designed to be reconfigurable to optimize efficiency under different load conditions and modulations. We believe this attribute is highly valued by 3G and 4G handset OEMs to address battery life under high data usage conditions. With our UltraCMOS technology we have the ability to integrate our PAs on a single chip with other RF, mixed signal, and digital components. We are currently developing PAs.

Technology

We have successfully developed and optimized UltraCMOS technology, a proprietary process technology for manufacturing silicon CMOS circuits on insulating substrates. We believe that our fundamental competitive advantage lies in the design and manufacturing of high performance RFIC products using our UltraCMOS technology and have secured broad patent rights covering the significant aspects of our manufacturing processes and circuit designs based on this material system.

Our UltraCMOS Process Technology

The processes that we utilize are all based on SOI substrate materials that provide near perfect electrical insulation. These substrates are then used to build CMOS -based circuit elements using industry standard semiconductor fabrication equipment, while the electrically-insulating substrate results in a broad set of unique physical and electrical properties with particular applicability in RF as well as other areas.

Due to the unique physical characteristics of the UltraCMOS material system, our products are able to overcome the inherent limitations of standard CMOS devices manufactured on bulk silicon substrates, as well as products manufactured using specialty process technologies, while exhibiting the best characteristics of both sets of technologies. Products manufactured using our UltraCMOS technology have advantages in high frequency and high power performance, and can include significantly higher quality passive elements than is possible with bulk silicon CMOS or bipolar devices. In addition, our UltraCMOS technology allows higher levels of monolithic integration, more aggressive technology scaling, and lower power operation than can be achieved with specialty GaAs processes.

The unique combination of performance, integration, and scaling characteristics of our UltraCMOS technology results in numerous key attributes for use in RFICs:

• extremely low parasitic capacitance, resulting in excellent high-frequency performance, high power handling capability, and low power consumption characteristics;

• extremely high signal isolation, leading to minimal crosstalk between different frequencies and the ability to reduce the physical size of the device;

• excellent broadband linearity, which results in improved network efficiency, subscriber carrying capacity, and enhanced communication data rates;

• ability to integrate multiple analog RF devices and high quality passive devices, such as inductors, along with digital logic, memory, and other mixed-signal functions with a single manufacturing process, which enables monolithically-integrated RFICs with improved performance characteristics and dramatically smaller device size;

• ability to scale to advanced process geometries, per Moore’s Law, resulting in further improvements in performance, cost, and reduced product footprint;

• excellent tolerance to high-voltage ESD effects, thereby reducing the external protective circuitry required and improving manufacturing yields of module manufacturers, OEMs, and contract manufacturers;

• ability to support advanced chip-scale packaging, or CSP, offering dramatically smaller device size and the elimination of undesirable package-related electrical effects; and

• high radiation resistance, making our UltraCMOS technology ideal for products used in satellite communications and certain medical applications subjected to single-event and total dose radiation effects.

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Comprehensive UltraCMOS RFIC Design Capability

The many unique attributes offered by UltraCMOS technology have provided our product designers with an unmatched level of flexibility to solve many long-standing high performance RFIC design challenges inadequately addressed by prevailing semiconductor technologies. Through our pioneering work in silicon-on-insulator (SOI) based products, we have developed many innovative circuit designs and techniques for which we have secured broad patent rights.

For example, through a patented technique involving the stacking of multiple transistors, we have developed circuits able to handle high power levels not possible using standard CMOS technology. We also have patented design advancements, enabled by our UltraCMOS process, including HaRP^TM technology, which significantly improves the harmonic and linearity performance of RF switches, as well as DuNE technology, a patent pending circuit design technique that we have used to develop our advanced DTC products.

We have gained extensive experience and know-how in developing optimized circuit block design techniques and computer-aided design, or CAD, tools that take full advantage of the unique physical and electrical properties of the SOI material system. We have also leveraged the sophisticated CAD tools available to support the standard CMOS design environment, to gain substantial expertise in the use of these tools for the automated design, simulation and design validation of high performance UltraCMOS-based RFICs. As we have grown our portfolio of RFICs over time, we have amassed a significant library of RF circuit “building blocks” that were developed utilizing our CAD tools. Unlike most other RF product suppliers, since all of our products are based on UltraCMOS technology platforms, our library of proven building blocks can quickly be assembled into more complex monolithically integrated RFICs to meet our customers’ expanding system requirements. In addition, we have utilized our extensive system-level expertise to design our RFIC products to work seamlessly in our OEM customers’ system environment.

Research and Development

We view our technology as a competitive advantage, and invest heavily in research and development to ensure our products meet the requirements of module manufacturers and OEMs. Our research and development expense was $42.2 million, $34.1 million, and $22.7 million in 2013, 2012, and 2011, respectively. At December 28, 2013, there were 158 people in our research and development organization, located at our facilities in California, Illinois, and United Kingdom.

We focus our research and development efforts on designing and introducing new products and enhancing our UltraCMOS process technology. Our circuit design efforts are focused on developing products that provide high levels of performance together with integration of RF functions as well as analog, digital, and passive elements on a single chip. Our core team of experienced engineers works closely with a number of our customers to develop and introduce custom products that address the specific requirements of those customers.

We also engage in customer and government sponsored research and development activities. We believe these activities help support the continued development of our core technologies and enhance our relationships with customers and other partners. Our policy is to accept sponsored research and development where it aligns with our other strategies, as well as our technology and product roadmaps, for the enhancement of our UltraCMOS technology and RFICs. We also undertake such activities where we are able to retain proprietary rights with respect to our technology developed in the course of such sponsored research and development activities.

Sales and Marketing

We sell our products worldwide through our direct sales force and field applications engineering staff, our network of domestic and international independent sales representatives, and both worldwide and regional distribution partners. Each of these channels is supported by our customer service and marketing organizations. We have sales and customer support personnel in the U.S., France, China, United Kingdom, Finland, Denmark, South Korea, Taiwan, and Japan.

Our design cycle from initial engagement to volume shipment can be from six months to two years, with product life cycles in the markets we serve ranging from one to five years or more. For many of our products, early engagement with the module manufacturers’ and OEMs’ technical staff is necessary for success. To ensure an adequate level of early engagement, our application and development engineers work closely with the module manufacturers, OEMs, and contract manufacturers to identify and propose solutions to their system challenges.

Our direct sales force and field applications engineers provide our customers technical assistance with the selection and use of our products. Our network of sales representatives and distributors have been selected based on their focus on and knowledge of RFICs, their ability to provide a high level of field application engineering support or their regional logistical support capabilities. We provide ongoing technical training for new products to our sales representatives and distributors to keep them informed of product enhancements and new product releases. We plan to expand our direct sales and support

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capabilities and our network of independent sales representatives in key regions domestically and internationally. We share product information and technical specifications with our customers using web-based tools.

We maintain an internal marketing organization responsible for the production and distribution of sales and marketing materials, including press releases, product announcements, product brochures, advertisements, and featured articles in trade publications. We also participate in industry tradeshows and conferences to enhance our visibility.

Customers

Our products are sold directly and indirectly to leading companies in each of our target markets, including space and military, broadband, industrial, mobile device, test and measurement equipment, and wireless infrastructure markets. We sell our products through our direct sales force, our network of sales representatives and distributors, as well as to contract manufacturers and module manufacturers who incorporate our products into their modules which are then sold to OEMs. Macnica, Inc. and Richardson Electronics, Ltd. are our primary distributors, and represented 69% and 11%, respectively, of our revenue for the year ended December 28, 2013, 72% and 11%, respectively, of our net revenue for the year ended December 29, 2012, and 48% and 16%, respectively, of our net revenue for the year ended December 31, 2011.

We currently rely, and expect to continue to rely, on a limited number of customers for a significant portion of our net revenue. Sales through our distributor Macnica to module manufacturer Murata Manufacturing Company, Ltd. represented 69%, 69%, and 39% of our net revenue for the year ended December 28, 2013, December 29, 2012, and December 31, 2011, respectively, and we believe substantially all of the products sold by Murata are to a limited number of mobile handset manufacturers. The majority of our business from our largest customers, including sales to Murata through our distributor Macnica, is conducted through standard purchase orders, which provide no contractual guarantees beyond the purchase order itself. No other direct or indirect customer accounted for more than 10% of our total net revenue for the year ended December 28, 2013.

Based on our direct customer sales, and records from our distributors of shipments to their customers, the top 10 end customers of our products represented 82%, 82%, and 66% of our net revenue for the year ended December 28, 2013, December 29, 2012, and December 31, 2011, respectively. For the year ended December 28, 2013, our products were sold to more than 1,700 module manufacturers, OEMs, contract manufacturers, and other customers. We believe our RFICs are included in products sold by many of the leading mobile handset OEMs.

A substantial portion of our net revenue is generated from customers outside of North America, and we anticipate that such net revenue will continue to comprise a significant portion of our net revenue. For the year ended December 28, 2013, 17%, 79%, and 4% of our net revenue was attributable to customers based in North America, Asia, and Europe, respectively. For the year ended December 29, 2012, 17%, 79%, and 4% of our net revenue was attributed to customers based in North America, Asia, and Europe, respectively. For the year ended December 31, 2011, 30%, 61%, and 9% of our net revenue was attributed to customers based in North America, Asia, and Europe, respectively. A summary of our financial information by geographic location is found in Note 11, “Concentrations and Geographic Information,” in the Notes to Consolidated Financial Statements. Our distributor and customer concentration, as well as our international operations and sales, subject us to a variety of risks; see Item 1A, “Risk Factors,” for further discussion.

Competition

The design, development, marketing and sale of high performance RFICs to the space and military, broadband, industrial, mobile device, test and measurement equipment, and wireless infrastructure markets are intensely competitive and characterized by rapid technological change, evolving standards, varying product life cycles, and pricing pressures. We expect competition to intensify as competitors expand their product offerings and as new competitors enter the market. We believe that high performance RFIC providers compete principally on product capabilities, levels of integration, innovation, reliability, price, time-to-market, overall system cost, intellectual property, customer support, reliability of supply, and reputation. We believe we compete favorably with respect to these factors.

We compete with a number of large domestic and international suppliers of RFICs in our target markets. We currently compete in the mobile device and wireless infrastructure markets with Avago Technologies Limited, Hittite Microwave Corporation, Infineon Technologies AG, M/A-COM Technology Solutions Inc., NEC Corporation, Renesas Electronics Corporation, RF Micro Devices, Inc., Skyworks Solutions, Inc., Sony Corporation, Texas Instruments Incorporated, Toshiba Corporation, TriQuint Semiconductor, Inc., and others. In the broadband, test and measurement equipment, and industrial markets, we principally compete with Hittite, Intersil Corporation, M/A-COM, Renesas, Skyworks, and others. Our principal competitors in the space and military markets include Analog Devices, Inc., Hittite, M/A-COM, and others. We also expect that in the future we may face competition from suppliers of RFICs based on new or emerging technologies.

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Although we have a long operating history, many of our current and potential competitors may have better name recognition, access to a larger customer base and significantly greater financial, sales and marketing, manufacturing, distribution, technical, and other resources than us. As a result, those companies may be able to respond more quickly to changing customer demands or devote greater resources to the development, promotion, and sale of their RFICs than we can. See Item 1A, “Risk Factors,” for further discussion of risks regarding competition.

Manufacturing

We are a fabless semiconductor company and we utilize third-party foundries, wafer preparation suppliers, and packaging contractors, along with a combination of internal and external testing, to manufacture our RFICs. We have accumulated significant materials and we work closely with each of our manufacturing partners to implement our proprietary technologies in order to meet the extremely high quality and reliability standards of our end customers. Our outsourced manufacturing approach allows us to minimize our capital expenditures, scale our business rapidly, and leverage the high volume manufacturing expertise of others. The following is an overview of our manufacturing process:

• Wafer Procurement. Silicon wafers are a key raw material used in our manufacturing processes. We use both silicon-on-sapphire (SOS) and silicon-on-insulator (SOI) wafers for our products. Worldwide production and availability of synthetic sapphire has risen dramatically in recent years as a number of new producers have entered the market given the widespread use of sapphire as a substrate for blue and white light-emitting diodes, or LEDs. We currently rely on Kyocera Corporation, Rubicon Technology Inc., and Namiki Precision Jewel Co., Ltd. for the supply of our sapphire substrates and are not dependent on any single source. For our SOI wafers we have established a supply relationship with Soitec. In some circumstances we may be required to qualify new sources of sapphire supplies if we, or our third-party foundries, are unable to obtain adequate supplies from our current suppliers.

• Wafer Preparation. Our fundamental manufacturing processes for SOS wafers involve the placement of a thin monocrystalline silicon layer onto substrate. The thin silicon layer is either epitaxially grown or bonded onto the substrate. We carefully qualify each of our epitaxial and bonded outside suppliers for wafer preparation. Our principal outside suppliers for epitaxial services are LAPIS Semiconductor Co., Ltd. and Hermes Epitek Corp. Our principal outside supplier for bonded wafers and SOI wafers is Soitec USA, Inc.

• Wafer Fabrication. Our RFICs are currently manufactured by third-party CMOS foundries located in Japan, Singapore, South Korea, and Australia. We carefully qualify each of our foundries to ensure their ability to implement our proprietary UltraCMOS technology within their wafer fabrication facilities. Our principal foundries are currently LAPIS Semiconductor, MagnaChip Semiconductor Ltd., and Silanna Semiconductor Pty Ltd for SOS wafers and Global Foundries, Inc. for SOI wafers.

• Test and Packaging. Our products are shipped as known-good-die, or KGD, or as packaged products. We test KGD both internally and at third-party subcontractors prior to finishing the product for shipment to customers, while our packaged products are assembled by third-party contractors utilizing industry standard packages prior to testing. We design and control our own test processes, utilizing a combination of both internal and outsourced testing. Our in-house testing provides us with additional insight into the performance of our products and enables faster time-to-market for our new products, while our use of third-party test service providers enables us to balance demand with our internal capacity. We believe our extensive experience in the testing of RFICs, and particularly as required for UltraCMOS technology, is a significant barrier-to-entry.

The majority of our relationships with our suppliers and manufacturing partners is on a basis which provides limited contractual guarantees of long term supply commitment. It is possible that any of our suppliers could terminate their supplier relationship with us, and in such event, we are typically provided reasonable notice of termination and a last time buy opportunity. See Item 1A, “Risk Factors,” for further discussion of manufacturing risks.

Quality Assurance

We are committed to providing high quality products and services that meet or exceed our customers’ expectations. We have developed and implemented a quality management system to create an organizational environment designed to meet the highest level of quality and reliability standards. Our quality management system has been certified and maintained to ISO 9001 standards since 2001. We achieved AS9100 Quality Management System Standards certification in 2003 to address the strict quality system requirements of the space industry. In early 2012, we further improved the robustness of our quality management system by receiving our ISO/TS 16949:2009 Quality Management System certification by the automotive industry, and during 2013, achieving AEC-Q100 qualification by passing a series of stress tests designed to ensure the quality, reliability, and endurance of semiconductors in automotive applications.

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Intellectual Property

Our success depends upon our ability to protect our core technology and intellectual property. To accomplish this, we rely on a combination of intellectual property rights, including patents, trade secrets, copyrights and trademarks, as well as customary contractual protections. We plan to pursue and maintain broad intellectual property protection in the U.S. and in our relevant markets worldwide. As of December 28, 2013, we had 71 issued and allowed U.S. patents and 12 issued and allowed international patents. In addition, as of the same date we had 62 pending U.S. patent applications and 30 pending international patent applications. Together, our patents and patent applications protect key aspects of our UltraCMOS technologies. We also rely on copyrights, trade secrets, technical know-how, and continuing innovation to develop and maintain our competitive position. Our 83 issued and allowed patents as of December 28, 2013 have expiration dates ranging from 2014 to 2033 with an average remaining patent life of approximately ten years.

We seek to protect our proprietary information and other intellectual property by generally requiring our employees, consultants, contractors, outside scientific collaborators, and other advisors to execute non-disclosure agreements on commencement of their employment or engagement as well as by documenting and maintaining the confidentiality of our trade secrets and other proprietary and confidential information. See Item 1A, “Risk Factors,” for further discussion of intellectual property risks and Item 3, "Legal Proceedings," for a discussion related to our lawsuit against RFMD alleging infringement of certain of our patents.

Employees

As of December 28, 2013, we had 423 employees, of which 390 were located in the U.S., 17 were located in Asia, and 16 were located in Europe. Of these employees, 158 were in research and development, 140 were in operations and manufacturing operations, 71 were in sales, applications, and marketing, and 54 were in general and administrative functions. Our employees are not covered by any collective bargaining arrangement. We have never had a work stoppage and we consider our employee relations to be good. Subsequent to December 28, 2013, we had a reduction in force of approximately 16% of our total employees.

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Item 1A. Risk Factors

You should carefully consider the following risk factors, as well as the other information in this report, before deciding whether to purchase, hold or sell shares of our common stock. The occurrence of any of the following risks could harm our business, financial condition, results of operations and/or growth prospects or cause our actual results to differ materially from those contained in forward-looking statements we have made in this report and those we may make from time to time. Any of these events could cause the trading price of our common stock to decline. You should consider all of the factors described when evaluating our business.

Risks Related to Our Business and Industry

Our operating results may fluctuate significantly and our future results are difficult to predict, which may cause us to fail to meet the expectations of investors.

We operate in a highly dynamic industry and our future results could be subject to significant fluctuations, particularly on a quarterly basis. Our quarterly net revenue and operating results have fluctuated significantly in the past and may continue to vary from quarter-to-quarter due to a number of factors, many of which are not within our control. As a result, comparing our operating results on a period-to-period basis may not be meaningful. A significant percentage of our net revenue in each quarter is dependent on sales that are booked and shipped during that quarter, typically attributable to a large number of orders placed through our distributors for diverse end users and markets. As a result, accurately forecasting our operating results, including our total net revenue and gross margins, in any quarter is difficult. For example, it is difficult for us to forecast the demand for our products, in part because of the complex supply chain between us and the end users of our products. We have limited visibility into future module manufacturer, OEM, distributor, and contract manufacturer demand and the product mix that they will require, which could adversely affect our net revenue forecasts and operating margins.

In addition, our failure to accurately forecast demand can lead to product shortages that can impede production by the module manufacturers and OEMs, and harm our relationships with them and the distributors of our products. Conversely, our failure to forecast declining demand or shifts in product mix can result in excess or obsolete inventory. The rapid pace of innovation in our industry could also render significant portions of our inventory obsolete. Excess or obsolete inventory levels could result in unexpected expenses or increases in our reserves that could adversely affect our business, operating results, and financial condition. In contrast, if we were to underestimate demand or if sufficient manufacturing capacity were unavailable, we could forego net revenue opportunities, potentially lose market share, and damage our relationships with parties that use or distribute our products.

In addition to the other factors described in this Part I, Item 1A, factors that can contribute to fluctuations in our operating results include:

• the timing and success of the introduction of new products and technologies by us and our competitors, and the acceptance of our new products by module manufacturers, OEMs, and end users;

• our gain or loss of a key module manufacturer, OEM, distributor, or contract manufacturer customers;

• the rescheduling, increase, reduction, or cancellation of significant orders or forecasted orders from module manufacturers, OEMs, distributors, or contract manufacturers;

• our ability to develop, introduce, and ship in a timely manner new products and product enhancements that meet the requirements of module manufacturers, OEMs, or end users of our products, including performance, functionality, reliability, form factor, and cost requirements;

• the rate at which module manufacturers, OEMs, and end users adopt our technologies in our target end markets;

• the availability, cost, and quality of materials and components that we purchase from third-party foundries and any problems or delays in the fabrication, wafer preparation, assembly, testing, or delivery of our products;

• fluctuations in manufacturing yields associated with new product introductions or changes in process technologies;

• the quality of our products and any remediation costs, including costs associated with the return of previously sold products due to manufacturing defects; and

• general economic conditions in our domestic and foreign markets.

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Due to these and other factors, quarter-to-quarter comparisons of our historical operating results should not be relied upon as accurate indicators of our future performance.

We may be unable to sustain our historical net revenue growth rate and if net revenue growth falls short of our expectations, we may not be able to immediately reduce our operating expenses proportionately, which could eliminate our profitability.

Over our history, we have experienced periods of relatively flat period-over-period growth, as well as periods of more rapid growth. From 2009 through 2013, our annual net revenue has increased at a CAGR of 30%. Our net revenue in the year ended December 29, 2012 increased by 89% over the corresponding period in 2011. However, our net revenue for the year

ended December 28, 2013 decreased by 0.8%, compared to the corresponding period in 2012. We believe that in planning our growth, it is prudent to take into account the cyclical nature of some of the end markets that we serve, as well as the longer term historical patterns in the development of our business. Although we base our planned operating expenses in large part on our expectations of future net revenue, a substantial portion of our expenses is relatively fixed, and cannot immediately be eliminated if our net revenue falls short of our expectations. Thus, if the rate in growth of our net revenue in any quarter is substantially less than we had anticipated, we may be unable to reduce our operating expenses commensurately in that quarter, which could negatively affect our results of operations for that quarter. For instance, for the quarter ended December 28, 2013, our net revenue declined to $43.3 million from $60.0 million for the quarter ended September 28, 2013. In addition, we experienced net losses of $6.8 million, $0.4 million and $1.2 million for the quarters ended December 28, 2013, June 29, 2013, and March 30, 2013, respectively, compared to net income of $5.6 million and $4.4 million for the quarters ended December 29, 2012 and September 28, 2013, respectively.

We rely on a small number of customers for a significant percentage of our net revenue, and the loss of, or a reduction in, orders from these customers could result in a significant decline in net revenue.

Although we have shipped our products to a large number of customers, we have historically depended on a small number of customers for a significant percentage of our annual net revenue. The composition of this group can change from year to year. Net revenue derived from our three largest direct customers as a percentage of our net revenue was 80% and 87% for the three months ended December 28, 2013 and December 29, 2012, respectively, and 83% and 85% for the years ended December 28, 2013 and December 29, 2012, respectively. Included in these percentages for our three largest direct customers are sales to two of our distributors. Based on records from our distributors of shipments to their customers, net revenue derived from our three largest end customers as a percentage of net revenue was 74% and 78% for the three months ended December 28, 2013 and December 29, 2012, respectively, and 73% and 73% for the years ended December 28, 2013 and December 29, 2012, respectively. Sales through our distributor Macnica to module manufacturer Murata represented 64% of our net revenue for the three months ended December 28, 2013 and 69% of our net revenue for the year ended December 28, 2013, and we believe substantially all of the products sold by Murata are to a limited number of mobile handset manufacturers. Any decrease in mobile handset sales by such manufacturers could have a material negative impact on our business, financial condition and results of operations. While the composition of our top customers varies from year to year, we expect that shipments to a limited number of customers will continue to account for a significant percentage of our net revenue for the foreseeable future. As a result of our customer concentration, our financial performance may fluctuate significantly from period to period based on the device release cycles and seasonal sales patterns of the mobile handset manufacturers and the success of their products.

With the exception of a supply and prepayment agreement with Murata, substantially all of our business, including that from our largest customers, is conducted through standard purchase orders, which provide no contractual guarantees beyond the purchase order itself. It is possible that any of our major customers could terminate its purchasing relationship with us or significantly reduce or delay the amount of our products that it orders, purchase products from our competitors, or develop its own products internally. The loss of, or a reduction in, orders from any major customer could cause a decline in net revenue and adversely affect our results of operations. To date, we have not experienced significant risk with respect to customer credit risk, but this could change as we expand our business in size and into new geographies in the future. In addition, during the year ended December 28, 2013, we entered into a royalty agreement with Murata.

We have incurred significant losses in the past and may incur losses in the future.

As of December 28, 2013, we had an accumulated deficit of $225.0 million, and we generated a net loss of $4.1 million for the year ended December 28, 2013. We expect to continue to make significant expenditures related to the development of our business. These include expenditures to hire additional personnel related to the sales, marketing, and development of our products, and to maintain and expand our research and development facilities. We may not have sufficient net revenue growth to offset increased expenses or to achieve or maintain profitability in future periods.

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The average selling prices of RFICs in our markets have historically decreased over time and will likely do so in the future, which could adversely impact our net revenue and gross profits.

Average selling prices of RFICs in the markets we serve have historically decreased over time and we expect such declines to continue to occur. Our gross profits and financial results will suffer if we are unable to offset reductions in our average selling prices by reducing our costs, developing new or enhanced RFICs on a timely basis with higher selling prices or gross profits, or increasing our sales volumes. Additionally, because we do not operate our own manufacturing or assembly foundries, we may not be able to reduce our costs as rapidly as companies that operate their own facilities, and our costs may even increase, which could also reduce our margins. In the past, we have reduced the prices of our RFICs in anticipation of future competitive pricing pressures, new product introductions by us or our competitors, and other factors. We expect that we will have to continue to do so in the future.

Changes in our product mix and in our manufacturing operations utilization may adversely affect our gross margins and operating results.

Our products have a wide range of gross margins, and our overall gross margin in any period is highly dependent on the percentage of our net revenue attributable to higher or lower margin products in that period. The product mix that module manufacturers, OEMs, distributors, and contract manufacturers will require varies greatly from period-to-period and is difficult for us to predict, and a shift in product mix in any given period to a greater percentage of lower margin products would adversely affect our gross margins and operating results. For example, for the three month period ended December 25, 2010 our gross margin was 48% compared to the three month period ended September 24, 2011 in which our gross margin was 27%. As a result of changes in product mix, our operating results will vary from period-to-period and could be adversely affected. For the quarter ended December 28, 2013 our gross margin was 36%.

In addition, we are generally faced with a decline in the utilization of our manufacturing operations during periods of reduced demand, as a certain portion of our manufacturing costs are relatively fixed. During periods of reduced demand, these overhead costs are allocated over a smaller number of units, which will result in increased product cost. Reduced market demand in the future may adversely affect our utilization and consequently result in lower gross margins for our products. Fluctuations in our gross margins for our products could have a material negative impact on our business, financial condition and results of operations.

The lead time to produce our product is generally longer than the end-customer’s commitment time; therefore, our sales

and operating results in any quarter are difficult to forecast.

We base our production volume on our lead time and forecasts from our customers. Because our typical lead time is longer than customers commitments, they may cancel or reschedule certain orders after we have begun production. Therefore, cancellations, reductions, or delays of orders from any significant customer could have a material adverse effect on our business, financial condition, and results of operations. For instance, during the fourth quarter of fiscal 2013 we wrote off $3.1 million of excess inventory.

If we fail to penetrate key players in our existing markets or fail to penetrate new markets, our net revenue, net revenue growth rate, if any, and financial condition could be materially and adversely affected.

We currently sell most of our products into the space and defense, broadband, industrial, mobile device, test and measurement equipment, and wireless infrastructure markets. Our net revenue growth, if any, will depend in part on our ability to penetrate key customers in these target markets and to continue to develop and broaden our relationships with key players in the wireless ecosystem including wireless network operators, leading device and equipment OEMs, and reference design partners. Each of the markets we serve presents distinct and substantial risks. If any of these markets does not develop as we currently anticipate or if we are unable to penetrate them successfully, it could materially and adversely affect our net revenue and net revenue growth rate, if any.

In addition, the markets for certain of our products, such as DC-DC converters and DTCs, are new, still developing and relatively small. We have sold or provided samples of limited quantities of our products into these markets and cannot predict how or to what extent demand for our products in these markets will develop. If we fail to penetrate these or other new markets upon which we target our resources, our net revenue and net revenue growth rate, if any, likely will decrease over time and our financial condition could suffer.

We recently announced a new product offering referred to as UltraCMOS Global 1 (Global 1) that targets the handset marketplace with products that integrate much of the functionality of the RF portion of the handset.  The development of Global 1 requires the monolithic integration of functionality that is currently addressed through discrete components.  If we

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are unsuccessful in integrating the required functionality, or our products take longer to develop than competitive offerings, the Global 1 products may not be successful in the marketplace, and our net revenue and net revenue growth rate, may decrease over time, and our financial condition could suffer. If the market  for an integrated RF front end develops, it may make it more difficult for us to sell RF switches and other discrete components that do not integrate the functionality of the RF front end.  In addition, if this market does develop it may require us to compete against modem vendors that have the ability to bundle products competitive with our offering, limiting our success in the market. For instance, Qualcomm Incorporated recently announced RF 360, an integrated RF front-end product, which could be bundled exclusively with its transceiver and modem and make it very difficult for us to sell our integrated Global 1 products as well as our other front end discrete products such as RF switches.

If module manufacturers or OEMs do not design our RFICs into their product offerings, or if such module manufacturers’ or OEMs’ product offerings are not commercially successful, we would have difficulty selling our RFICs and our business could be adversely affected.

Our products are sold directly and through our distributors and contract manufacturers to module manufacturers who include one or more of our RFICs in the products they supply to OEMs, and to OEMs who include our RFICs in their products. Our RFICs are generally incorporated into the module manufacturers’ and OEMs’ products at the design stage. As a result, we rely on module manufacturers and OEMs to design our RFICs into the products they sell. Without these design wins or reductions of our RFICs incorporated into module manufacturers’ and OEMs’ products, our business could be materially and adversely affected. We often incur significant expenditures on the development of a new RFIC without any assurance that a module manufacturer or OEM will select our RFIC for design into its own product. Once a module manufacturer or OEM designs a competitor’s semiconductor into its product offering, it becomes significantly more difficult for us to sell our RFICs directly or indirectly to that module manufacturer or OEM because changing suppliers involves significant cost, time, effort, and risk for the module manufacturer or OEM. Furthermore, even if a module manufacturer or OEM designs one or more of our RFICs into its product offering, we cannot be assured that its product will be commercially successful and that we will receive any net revenue from that product. If the module manufacturers’ or OEMs’ products incorporating our RFICs fail to meet the demands of their customers or otherwise fail to achieve market acceptance, we will be unable to achieve broad adoption of our UltraCMOS technology. As a result, our net revenue and business would be adversely affected.

Our failure to comply with U.S. laws and regulations relating to the export and import of goods, technology, and software could subject us to penalties and other sanctions and restrict our ability to sell and develop our products.

We are obligated by law to comply with all U.S. laws and regulations governing the export and import of goods, technology, and services, including International Traffic In Arms Regulations (ITAR), Export Administration Regulation (EAR), regulations administered by the Department of Treasury’s Office of Foreign Assets Control, and regulations administered by the Bureau of Alcohol Tobacco Firearms and Explosives governing the importation of items on the U.S. Munitions Import List. Pursuant to these regulations, we are responsible for determining the proper licensing jurisdiction and export classification of our products, and obtaining all necessary licenses or other approvals, if required, for exports and imports of hardware, technical data, and software, or for the provision of technical assistance or other defense services to or on behalf of foreign persons. We are also required to obtain export licenses, if required, before employing or otherwise utilizing foreign persons in the performance of our contracts if the foreign person will have access to export-controlled technical data or software. The violation of any of the applicable laws and regulations could subject us to administrative, civil, and criminal penalties. In addition, we would also incur substantial legal fees, and our management’s attention and resources would be diverted from operating our business to respond to violations, which could harm our business. For example, during the quarter ended December 28, 2013, we incurred $0.7 million in legal fees for ITAR related matters.

These regulations could restrict our ability to sell existing products and develop new product lines. For example, as a result of ITAR requirements, we are unable to supply certain products to China satellite companies or end users, which comprise a significant part of the overall satellite market. Changes in our products or changes in export and import regulations may create delays in the introduction of our products in international markets, prevent our customers with international operations from deploying our products throughout their global systems or, in some cases, prevent the export or import of our products to certain countries altogether. Any change in export or import regulations or related legislation, shift in approach to the enforcement or scope of existing regulations, or change in the countries, persons, or technologies targeted by such regulations, could result in decreased use of our products by, or our ability to export or sell our products to, existing or potential customers with international operations and decreased revenue. Additionally, failure to comply with these laws could result in sanctions by the U.S. government, including substantial monetary penalties, denial of export privileges, and debarment from government contracts.

Additionally, on November 14, 2013, representatives of the U.S. Department of Homeland Security (DHS), in collaboration with the United States Attorney’s Office for the Southern District of California (USAO), executed a federal search

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warrant at our San Diego facilities in connection with an investigation into exports and temporary imports of certain products sold in the aerospace market. We are cooperating fully with the USAO and DHS officials.

  The U.S. Department of State, Office of Defense Trade Controls Compliance, is conducting a review of our compliance with the Arms Export Control Act (AECA) and the AECA’s implementation of ITAR. Based on this review we could be subject to continued investigation and potential regulatory consequences related to these violations ranging from a no-action letter, government oversight of facilities and export transactions, monetary penalties of up to $0.5 million per violation, and in certain cases, debarment from government contracting, denial of export privileges, and criminal penalties.

The segment of the semiconductor industry in which we participate is intensely competitive, and our inability to compete effectively could adversely affect our business.

The markets for our products are extremely competitive, and are characterized by rapid technological advances, frequent new product introductions, evolving industry standards, price erosion, and the continuously evolving requirements of module manufacturers and OEMs. This competition could result in increased pricing pressure, reduced profit margins, increased sales and marketing expenses, and failure to increase, or the loss of, market share, any of which could adversely affect our business. We compete primarily with other suppliers of high performance RFICs. We currently compete in the mobile device and wireless infrastructure markets with Avago, Hittite, Infineon, M/A-COM, NEC, Renesas, RF Micro Devices, Inc. (RFMD), Skyworks, Sony, Texas Instruments, Toshiba, TriQuint Semiconductor, and others. In the broadband, test and measurement equipment, and industrial markets, we principally compete with Hittite, M/A-COM, Renesas, Skyworks, and others. Our principal competitors in the space and military markets include Analog Devices, Hittite, Intersil, M/A-COM, and others. We expect increased competition from other established and emerging companies if our market continues to develop and expand. For example, a number of competitors now also offer competitive products based on SOI technologies and we expect that this could increase in the future because of the benefits of using SOI. Current or potential competitors have also established or may establish financial and strategic relationships with each other or with existing or potential customers or other third parties to increase the ability of their products to address the needs of our prospective customers. Accordingly, it is possible that new competitors or alliances among competitors could emerge and rapidly acquire significant market share, which would adversely affect our business. In addition, a competitor could acquire a partner to which we have licensed certain rights to sell products using our technology. In addition, we expect increased competition from companies using technologies or competitors using technologies based on standard CMOS. There can be no assurance that we will be able to compete successfully against current or potential competitors, or that competition will not have a material adverse effect on our business, financial condition, and results of operations.

In addition, we may face competition because of the potential risks customers associate with purchasing products from sole sources. Because our products are manufactured using a proprietary technology, customers may be reluctant to purchase some our products because they may view us as a sole source supplier for certain of their component parts. Customers generally prefer to incorporate components into their products that can be sourced from multiple suppliers.

We depend on limited sources of supply for some of the key components and materials in our products, and a limited number of suppliers for wafer preparation, which makes us susceptible to shortages, price fluctuations, and quality risks that could adversely affect our operating results.

We purchase a number of key components and materials used in our products from limited source suppliers. For example, we currently obtain synthetic sapphire substrates from three third-party suppliers, including Kyocera, Rubicon, and Namiki. Our current consumption levels of synthetic sapphire represent less than approximately two percent of worldwide synthetic sapphire production. We believe that our suppliers currently have manufacturing capacity adequate to meet our foreseeable requirements. However, if competition for capacity were to increase, our suppliers could increase the lead times required to deliver materials to us or could seek to increase the prices of materials we purchase from them. For example, competition for synthetic sapphire wafer capacity has increased significantly in recent years due to the use of sapphire as a substrate for blue and white LEDs. This increasing demand for synthetic sapphire for use in LEDs has resulted in substantial increases in the cost of sapphire substrates and could adversely impact our manufacturing costs as well as the availability of sapphire substrate supply. In addition, we and our outside foundries use a limited number of suppliers for wafer preparation. For example, we currently obtain bonded SOS wafers and SOI wafers from Soitec.

If our limited source suppliers and suppliers for wafer preparation were to experience difficulties that affected their manufacturing yields or the quality of the materials they supply to us, our cost of net revenue could be adversely affected. Longer lead times and quality problems experienced by our suppliers could also prevent us from fulfilling the demands of the module manufacturers, OEMs, distributors, and contract manufacturers for our products on a timely basis, and thus adversely affect our net revenue. The ability of our suppliers to meet our requirements could be impaired or interrupted by factors beyond their control, such as earthquakes or other natural phenomena, labor strikes or shortages, or political unrest. In the event one of our suppliers is unable to deliver products to us or is unwilling to sell materials or components to us, our operations may be

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adversely affected. We might also experience difficulty identifying alternative sources of supply for the materials or components used in our products or products we obtain through outsourcing. We could experience delays if we were required to test and evaluate products of potential alternative suppliers or products we obtain through outsourcing. Furthermore, financial or other difficulties faced by our suppliers, or significant changes in demand for the components or materials they use in the products they supply to us, could limit the availability of those products, components, or materials to us. Any of these occurrences could negatively impact our operating results and adversely affect our business.

If we fail to develop new or enhanced products that achieve market acceptance in a cost-effective and timely manner, our operating results could be adversely affected.

The markets for our products are characterized by frequent new product introductions and changes in product and process technologies. The future success of our business will depend on our ability to develop new products for existing and new markets, introduce these products in a cost-effective and timely manner, have our products designed into the products of leading module manufacturers and OEMs, and have our products gain broad adoption by end users. The development of new high performance RFICs is highly complex, and from time-to-time we may experience delays in completing the development and introduction of new products or fail to efficiently manufacture such products in the early production phase. Our ability to successfully develop, introduce, and deliver new high performance RFICs will depend on various factors, including those described in this Part I, Item 1A as well as our ability to:

• complete and introduce new product designs;

• achieve design wins with module manufacturers and OEMs, and broad adoption by end users;

• meet the time pressures associated with the demands of the module manufacturers and OEMs to which we sell through our distributors and contract manufacturers;

• accurately understand market requirements;

• attract and retain skilled engineering, operations, and manufacturing personnel;

• obtain adequate supplies of materials and components that meet our quality requirements; and

• achieve adequate manufacturing yields and maintain sufficient supply through our third-party foundry relationships.

We believe that our UltraCMOS platform gives us a competitive advantage because it enables us to develop new products that integrate RF, analog, digital, and other functions on a single chip. However, if our competitors implement technologies such as SOI that enable them to better integrate functionality or if demand for integrated components in the future is smaller than anticipated, our competitive advantage would be diminished and our business could be adversely affected.

Our failure to continue to keep pace with new or improved semiconductor process technologies could impair our competitive position.

The semiconductor industry has historically been characterized by advancing technology through smaller geometries and larger wafer sizes, as well as through other proprietary and non-proprietary techniques. Although we have certain proprietary semiconductor processes, such as the application of silicon on a sapphire substrate and SOI in our UltraCMOS process, we constantly seek to develop new and improved techniques and methods internally and with the assistance of our suppliers. For example, we are currently working with numerous suppliers with respect to our next generation technologies. There can be no assurance that our efforts with these suppliers will ultimately be successful or result in next generation technologies that enable us to cost effectively produce our products in the future. For example, higher costs associated with the introduction and start up of new technologies could negatively impact our gross margins if the selling prices for our products based on new technologies do not sufficiently offset our higher costs for these technologies. For instance, we implemented new manufacturing processes in 2011 which resulted in low yields of certain wafers. As such, we recorded reductions to the carrying value of inventory as a result of a lower of cost or market valuation. Gross margins declined in our third and fourth quarter of fiscal 2011 as a result. Our future success depends in part upon our ability to continue to improve our semiconductor process technologies in order to adapt to emerging module manufacturer and OEM requirements and to competitive market conditions. If we fail for any reason to remain abreast of new and improved semiconductor process technologies as they emerge, we may lose market share which could adversely affect our operating results.

Standard CMOS is the semiconductor industry’s most broadly used manufacturing process technology and the semiconductor industry has committed significantly greater resources to standard CMOS, SOI, and gallium arsenide, or GaAs, process technologies, as compared to our technology. Therefore, with the resources available to competitors using those

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technologies, they may more quickly adapt to emerging module manufacturer and OEM requirements and competitive market conditions than we can.

If the manufacturing yields that we realize in our production of integrated circuits, or ICs, were to decrease, our operating results could be adversely affected.

The manufacture and assembly of ICs, particularly high performance RFICs that we supply, is a highly complex process that is sensitive to a wide variety of factors, including the level of contaminants in the manufacturing environment, impurities in the materials used, and the performance of the fabrication equipment. As is typical in the semiconductor industry, we have from time to time experienced lower than anticipated manufacturing yields. In particular, we have in the past and may experience in the future lower manufacturing yields with respect to the introduction of new products, migration to smaller geometries, or the installation and start up of new process technologies. Our operating results could be adversely affected if we were unable to maintain current manufacturing yields through our third-party foundry relationships. For example, we experienced lower than anticipated yields on certain wafers due to the implementation of new manufacturing processes and recorded an inventory write-down of $3.1 million for the quarter ended September 25, 2011, as a result of a lower of cost or market valuation.

We are subject to certain inventory risks.

We have limited visibility into future module manufacturer, OEM, distributor, and contract manufacturer demand and the product mix that they will require. Our failure to forecast declining demand or shifts in product mix can result in excess or obsolete inventory. The rapid pace of innovation in our industry could also render significant portions of our inventory obsolete. For example, we face inventory risks when we purchase material in advance and the OEM, distributor, or contract manufacturer subsequently decides to terminate use of our products or transition to the next generation of one or more of our products. If our estimates of inventory requirements are inaccurate, we will bear the cost of holding the inventory, may recognize a loss on inventory which is no longer used due to the transition to the next generation of our products or may incur additional costs to acquire additional inventory on an expedited basis.

Our production cycle times could be longer than our customer commit time. The cycle time to build inventory may pose a risk of inventory exposure to changing market demand and result in higher inventory levels and cash consumption. For instance, building inventory quickly enough in times of high demand may not be feasible and we may damage our relationships with parties that use or distribute our products. Similarly, in times of falling demand we may hold inventory in excess of forecasts or inventory that is obsolete which could result in unexpected expenses or increases in our reserves that could adversely affect our business, operating results, and financial condition. For instance, during the fourth quarter of fiscal 2013 we incurred $3.1 million of costs in relation to excess inventory and lower of cost or market valuation.

We depend on LAPIS Semiconductor, MagnaChip Semiconductor, Silanna Semiconductor Pty, and other outside semiconductor foundries to manufacture our products and implement our fabrication processes, and any failure to maintain sufficient foundry capacity could significantly delay our ability to ship our products, damage our relationships with module manufacturers, OEMs, distributors, and contract manufacturers, reduce our sales, and increase our expenses.

We do not own or operate any fabrication facilities and instead outsource fabrication of our products to independent foundries. LAPIS Semiconductor, MagnaChip Semiconductor, and Silanna Semiconductor manufactured 100% of the wafers used in our products for the year and three months ended December 28, 2013 and December 29, 2012.

We place our purchase orders with foundries based on sales forecasts for our products. If any third-party foundry does not provide competitive pricing or is not able to meet our required capacity for any reason, or if our business relationship with LAPIS Semiconductor, MagnaChip Semiconductor, Silanna Semiconductor, or any other semiconductor foundry deteriorates, we may not be able to obtain the required capacity and would have to seek alternative foundries, which may not be available on commercially reasonable terms, or at all. The process for qualifying a new foundry is time consuming, difficult, and may not be successful, particularly if we cannot promptly integrate our proprietary process technology with the process used by the new foundry. Using a foundry with which we have no established relationship could expose us to potentially unfavorable pricing, unsatisfactory quality, or insufficient capacity allocation.

In addition to the other factors described in this Part I, Item 1A, we face a number of other significant risks associated with outsourcing fabrication, including:

• limited control over delivery schedules, quality assurance and control, and production costs;

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• discretion of foundries to reduce deliveries to us on short notice, allocate capacity to other customers that may be larger or have long-term customer or preferential arrangements with foundries we use;

• inability of foundries to adequately allocate additional capacity to us based upon an increase in demand for our products;

• unavailability of, or potential delays in accessing, key process technologies;

• damage to equipment and facilities, power outages, equipment, or materials shortages that could limit manufacturing yields and capacity at the foundries;

• potential unauthorized disclosure or misappropriation of IP, including use of our technology by the foundries to make products for our competitors;

• financial difficulties and insolvency of foundries;

• acquisition of foundries by third parties; and

• lack of long-term manufacturing commitments by the foundries.

Any of the foregoing risks could delay shipment of our products, result in higher expenses and reduced net revenue, damage our relationships with module manufacturers, OEMs, distributors, and contract manufacturers, and otherwise adversely affect our operating results.

If our principal end markets fail to grow or experience declines, our net revenue may decrease.

Although our products are used in a variety of end markets, our future growth depends to a significant extent on the success of our principal end markets. The rate at which these markets will grow is difficult to predict. These markets may fail to grow or decline for many reasons, including insufficient consumer demand, decreased demand for bandwidth, lack of access to capital and procurement processes, and changes in regulatory environments. If demand for high performance RFICs or devices in which our products are incorporated declines, fails to grow, or grows more slowly than we anticipate, purchases of our products may be reduced, and our net revenue could decline.

In particular, a significant portion of our products are incorporated into mobile devices. Accordingly, demand for our products is dependent on the ability of mobile device manufacturers to successfully sell wireless devices that incorporate our products. We cannot be certain whether these manufacturers will be able to create or sustain demand for their wireless devices that contain our products or how long they will remain competitive in their business, if at all. The markets for these manufacturers are intensely competitive and are characterized by rapid technological change. These changes result in frequent product introductions and short product life cycles. The success of these mobile device manufacturers and the demand for their wireless devices can be affected by a number of factors, including those described in this Part I, Item 1A as well as:

• market acceptance of their mobile devices that contain our products;

• the impact of slowdowns or declines in sales of mobile devices in general;

• their ability to design products with features that meet the evolving tastes and preferences of consumers;

• fluctuations in foreign currency;

• relationships with wireless carriers in particular markets;

• the implementation of, or changes to, mobile device certification standards and programs;

• technological advancements in the functionality and capabilities of mobile devices;

• the imposition of restrictions, tariffs, duties, or regulations by foreign governments on mobile device manufacturers;

• failure to comply with governmental restrictions or regulations;

• cost and availability of components for their products; and

• inventory levels in the sales channels into which mobile device manufacturers sell their products.

Our future net revenue growth depends on demand for bandwidth for many of our relevant markets, including mobile device, wireless infrastructure, and space and military. However, such bandwidth demands are subject to market changes and the evolving requirements of end users and therefore may not occur.

We design custom RFICs to meet specific requirements of the module manufacturers and OEMs. The amount and timing of net revenue from such products can cause fluctuations in our quarterly operating results.

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The design and sales cycle for our custom RFICs, from initial contact by our sales force to the commencement of shipments of those products in commercial quantities, is lengthy and can range from six months to as long as two years or more. As part of this process, our sales and application engineers work closely with either the module manufacturer or OEM to analyze their respective product requirements and establish a technical specification for the custom RFIC. We then evaluate test wafers and components, and establish assembly and test procedures before manufacturing in commercial quantities can begin. The length of this cycle is influenced by many factors, including the difficulty of the technical specification, the novelty and complexity of the design and the module manufacturers’ or OEMs’ procurement processes. Module manufacturers and OEMs typically do not commit to purchase significant quantities of a custom RFIC until they are ready to commence volume shipment of their own products, and volume purchases of our custom RFICs by module manufacturers or OEMs generally do not occur until they have successfully introduced the modules or products incorporating our RFICs. Our receipt of substantial net revenue from sales of a custom RFIC depends on the module manufacturer’s or OEM’s commercial success in manufacturing and selling its product incorporating our custom RFIC. As a result, a significant period may elapse between our investment of time and resources in a custom RFIC and our receipt of substantial net revenue from sales of that product. The length of this process increases the risk that such module manufacturer or OEM will decide to cancel or change its product plans. Such cancellation or change in plans by the module manufacturer or OEM could cause us to lose anticipated sales. In addition, our financial condition and results of operations would be adversely affected if a significant module manufacturer or OEM curtails, reduces, or delays orders during our sales cycle, chooses not to release equipment that contains our custom RFICs, or are themselves not successful in the sale and marketing of their products that incorporate our custom RFICs. Additionally, a module manufacturer or OEM occasionally requests that we create custom RFICs and they agree to purchase such products only if we provide periods of exclusivity during which we will provide those custom RFICs only to that customer. These exclusivity periods restrict our ability to generate sales of these products with other customers and may cause us to lose significant sales to other module manufacturers and OEMs. Finally, if we fail to achieve initial design wins in the module manufacturer’s or OEM’s qualification process, we may lose the opportunity for significant sales to that module manufacturer or OEM for a lengthy period of time because the module manufacturer or OEM may be unlikely to change its source for those products in the future due to the significant costs associated with qualifying a new supplier and potentially redesigning its product.

Our financial results are exposed to the cyclicality of the semiconductor industry, and as a result, we may experience reduced net revenue or operating income during any future semiconductor industry downturn.

The semiconductor industry is highly cyclical and has historically experienced significant fluctuations in demand, resulting in product overcapacity, high inventory levels, and accelerated erosion of average selling prices. These conditions have sometimes lasted for extended periods of time. Downturns in our target markets have in the past contributed to weak demand for semiconductor products. We experienced slower growth during periods of weak demand in the past, and our operating results may be adversely impacted by any downturns in the future. Future downturns in the semiconductor industry could adversely impact our net revenue and adversely affect our business, financial condition, and results of operations.

We rely substantially on distributors for the sale of our products, and if we fail to retain or find additional distributors, or if these parties fail to perform as expected, it could reduce our future net revenue.

A significant portion of our net revenue is derived from a limited number of distributors, in particular, Macnica and Richardson. Our distributor sales to Macnica are primarily flow-through sales to Murata, since the vast majority of the sales of our products by Macnica are to Murata. For the three months ended December 28, 2013, approximately 64% and 12% of our net revenue was derived from Macnica and Richardson, respectively, and for the year ended December 28, 2013, Macnica and Richardson accounted for 69% and 11% of our net revenue, respectively. We anticipate that we will continue to be dependent upon a limited number of distributors, including a limited number of end customers purchasing from Macnica, for a significant portion of our net revenue in the foreseeable future. The portion of our net revenue attributable to certain distributors may also fluctuate in the future since we are unable to predict the extent to which these distributors will be successful in marketing and selling our products. Furthermore, termination of a relationship with a major distributor, either by us or by the distributor, could result in a temporary or permanent loss of net revenue. We may not be successful in finding suitable alternative distributors on satisfactory terms, or at all, and this could adversely affect our ability to sell in certain geographical locations or to certain end customers. Additionally, if we terminate our relationship with a major distributor, we may be obligated to repurchase unsold products, which could be difficult or impossible to sell to other end customers. Furthermore, distributors we do business with may face issues obtaining credit, which could impair their ability to make timely payments to us.

In addition to distribution and sales activities, some of our distributors provide technical sales support to module manufacturers and OEMs. The activities of our distributors are not within our direct control. Our failure to manage our relationships with these distributors could impair the effectiveness of our sales, marketing, and support activities. A reduction in the sales efforts, technical capabilities, or financial viability of these parties, a misalignment of interest between us and them, or a termination of our relationship with our distributors could have a negative effect on our sales, financial results, and ability to support the OEMs and module manufacturers who purchase our products. We generally engage our distributors under short-

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term contracts, which typically may be terminated by either party upon 90 days’ notice. It generally takes approximately three months for a distributor to become educated about our products and capable of providing quality sales and technical support to the module manufacturers and OEMs. Recruiting and retaining qualified distributors and training them in our technology and product offerings requires significant time and resources. However, it may be difficult to terminate foreign distributors if they are not performing as expected. If our relationship with one of our other distributors were terminated for any reason, shipments to current and prospective module manufacturers and OEMs could be disrupted or delayed, and we could experience a diversion of substantial time and resources as we seek to identify, contract with, and train a replacement, all of which could adversely affect our operating results.

Defects and poor performance in our products could result in loss of module manufacturers and OEMs purchasing our products, decreased net revenue, unexpected expenses, and loss of market share, and we may face warranty and product liability claims arising from defective products.

Our products are complex and must meet stringent quality requirements. Products as complex as ours may contain undetected errors or defects, especially when first introduced or when new versions are released. Errors, defects, or poor performance can arise due to design flaws, defects in raw materials or components, or manufacturing difficulties, which can affect both the quality and the yield of the product. As our products become more complex, we face higher risk of undetected defects, because our testing protocols may not be able to fully test the products under all possible operating conditions. Any actual or perceived errors, defects, or poor performance in our products could result in the replacement or recall of our products, shipment delays, rejection of our products, damage to our reputation, lost net revenue, diversion of our engineering personnel from our product development efforts in order to address or remedy any defects, and increases in module manufacturer and OEM customer service and support costs, all of which could have a material adverse effect on our operations.

Furthermore, defective, inefficient, or poorly performing products may give rise to warranty and product liability claims against us that exceed any net revenue or profit we receive from the affected products. We could incur significant costs and liabilities if we are sued and if damages are awarded against us. Our agreements with the module manufacturers and OEMs who purchase our products through our distributors typically contain provisions designed to limit our exposure to potential product liability claims. However, the limitation of liability provisions contained in these agreements may still result in a significant financial exposure and may also not be effective as a result of federal, state, local, or foreign laws, or ordinances or unfavorable judicial decisions in the U.S. or other countries. In addition, even if ultimately unsuccessful, such claims against us could result in costly litigation, divert our management’s time and resources, and damage our relationships with the module manufacturers, OEMs, and distributors. Costs or payments we may make in connection with warranty and product liability claims or product recalls may adversely affect our financial condition and results of operations.

Our international sales and operations subject us to additional risks that can adversely affect our operating results.

The percentage of our net revenue attributable to customers based outside North America was 79% and 84% for the three months ended December 28, 2013 and December 29, 2012, respectively, and 83% for the years ended December 28, 2013 and December 29, 2012. We expect that net revenue derived from customers outside North America will continue to account for a significant portion of our net revenue. Currently, we maintain international sales offices in Europe and Asia, and we rely on a network of third-party sales representatives and distributors to sell our products internationally. Moreover, we have in the past relied on, and expect to continue to rely on, suppliers, manufacturers, and subcontractors located in countries other than the U.S., including Australia, Japan and South Korea. For example, we have agreements with LAPIS Semiconductor, MagnaChip Semiconductor, and Silanna Semiconductor concerning the fabrication of certain of our semiconductor products. The LAPIS Semiconductor fabrication facility is located in Miyazaki, Japan, and the MagnaChip Semiconductor fabrication facility is located in Cheongju, South Korea. We also have an agreement with Silanna Semiconductor concerning the fabrication of certain of our semiconductor products at Silanna Semiconductor’s fabrication facility in Sydney, Australia. Accordingly, we are subject to several risks and challenges related to our international sales and operations, any of which could adversely affect our financial results. These risks and challenges include those described in this Part I, Item 1A, as well as:

• difficulties and costs of staffing and managing international operations across different geographic areas and cultures;

• compliance with a wide variety of domestic and foreign laws and regulations, including anti-bribery laws and laws relating to the import or export of semiconductor products;

• legal uncertainties regarding taxes, tariffs, quotas, export controls, export licenses, and other trade barriers;

• seasonal reductions in business activities;

• our ability to receive timely payment and collect our accounts receivable;

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• political, legal, and economic instability, foreign conflicts, and the impact of regional and global infectious illnesses in the countries in which we and the module manufacturers, OEMs, distributors, contract manufacturers, suppliers, manufacturers, and subcontractors with whom we do business are located;

• legal uncertainties regarding protection for contractual and intellectual property rights in some countries, which increase the risk of unauthorized and uncompensated use of our products or technologies;

• fluctuations in foreign currency exchange rates and interest rates, including risks related to any interest rate swap or other hedging activities we undertake; and

• fluctuations in freight rates and transportation disruptions.

Any of these factors could adversely affect both our ability to effectively operate our foreign offices and the ability of our foreign suppliers to supply us with required materials or services. Any interruption or delay in the supply of our required components, products, materials, or services, or our inability to obtain these components, materials, products, or services from alternate sources at acceptable prices and within a reasonable amount of time, could impair our ability to meet scheduled product deliveries to module manufacturers, OEMs, distributors, and contract manufacturers and could cause them to cancel orders.

Additionally, most of our foreign sales, as well as our purchases of material from international suppliers, are denominated in U.S. dollars. An increase in the value of the U.S. dollar relative to foreign currencies could make our products more expensive for international module manufacturers, OEMs, distributors, and contract manufacturers to purchase, thus rendering the prices of our products less competitive. Conversely, a reduction in the value of the U.S. dollar relative to foreign currencies could increase our supply costs. At the present time, we do not have a foreign currency hedging policy in place.

Unfavorable economic conditions may adversely affect our net revenue, margins, and profitability.

From time to time, the global economy has experienced significant financial turmoil and upheaval characterized by volatility and declines in prices of securities and commodities, diminished credit availability, declining consumer and business confidence, inability to access capital markets, proliferation of bankruptcies, and rising unemployment rates. It is not clear how long uncertain economic conditions would continue, how quickly the economy and employment would recover, and how much adverse impact it could have on the global economy in general and, in particular, on the economies in North America, Europe, Asia, and other regions where we market and sell our products. Uncertain economic conditions may cause module manufacturers, OEMs, distributors, and contract manufacturers to reduce demand for our products, resulting from reduced demand of their customers, which would adversely affect our financial condition and results of operations.

Furthermore, consumer products that contain our RFIC products are discretionary purchases for consumers. Consumers are generally more willing to make discretionary purchases during favorable economic conditions. As a result of unfavorable economic conditions, including higher consumer debt levels and lower availability of consumer credit, consumers’ purchases of discretionary items may decline, which could adversely affect our net revenue.

If we lose key personnel or are unable to attract and retain personnel on a cost-effective basis, our business could be adversely affected.

Our performance is substantially dependent on the continued services and performance of our senior management and our highly qualified team of engineers, many of whom have numerous years of experience and specialized expertise in our business. Highly skilled RFIC design engineers, in particular, are in short supply. We expect to continue to hire additional engineering personnel in 2013 as we expand our RFIC design and systemlevel engineering capabilities. If we are not successful in hiring and retaining highly qualified engineers, we may not be able to extend or maintain our engineering expertise, and our future product development efforts could be adversely affected. Furthermore, the loss of members of our senior management could significantly delay or prevent the achievement of our strategic objectives, which could adversely affect our operating results.

Our future success also depends on our ability to identify, attract, hire, train, retain, and motivate highly skilled managerial, operations, sales, marketing, and customer service personnel. We have in the past maintained a rigorous, highly selective, and time-consuming hiring process. We believe that our approach to hiring has significantly contributed to our success to date. However, our highly-selective hiring process has made it more difficult for us to hire a sufficient number of qualified employees, and, as we grow, our hiring process may prevent us from hiring the personnel we need in a timely manner. Moreover, the cost of living in the San Diego area, where our corporate headquarters are located, has been an impediment to attracting new employees in the past, and we expect that this will continue to impair our ability to attract and retain employees

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in the future. If we fail to attract, integrate, and retain the necessary personnel, our ability to maintain and grow our business could suffer significantly.

We may not generate positive returns on our research and development investments.

Developing our products is expensive, and our investment in product development may involve a long payback cycle. In the three-month period ended December 28, 2013, December 29, 2012, and December 31, 2011, our research and development expenses were $10.8 million, or approximately 25% of our total net revenue, $10.6 million, or approximately 17% of our total net revenue, and $6.4 million, or approximately 18% of our total net revenue, respectively. In the years ended December 28, 2013, December 29, 2012, and December 31, 2011, our research and development expenses were $42.2 million, or approximately 21% of our total net revenue, $34.1 million, or approximately 17% of our total net revenue, and $22.7 million, or approximately 21% of our total net revenue, respectively. Our future plans include significant investments in research and development and related product opportunities. In addition, having the majority of research and development in the U.S. creates a cost disadvantage as compared to our competitors who may obtain significantly lower personnel and other costs by locating their research and development operations outside the U.S.

We believe that we must continue to dedicate a significant amount of resources to our research and development efforts to maintain our competitive position. However, our ability to generate positive returns on these investments may take several years, if we are able to do so at all.

We may encounter difficulties in enhancing or modifying our enterprise resource planning, or ERP, system, which may adversely affect our operations and financial reporting.

Any difficulties enhancing or modifying our current ERP system for new process activities or channel partners, could cause significant issues in the management of our business. We may fail to meet, or incur higher costs to meet, customer demand for our products, or we could be delayed in our ability to meet our financial reporting obligations as a result of ERP system errors, any of which could materially adversely affect our results of operations.

We may engage in future acquisitions or dispositions that could disrupt our business, cause dilution to our stockholders, or adversely impact our financial condition and operating results.

In the future we may acquire companies or assets or dispose of portions of our business in order to enhance our market position or strategic strengths. We are not currently a party to any agreements or commitments and we have no understandings with respect to any such acquisitions or dispositions. Our ability as an organization to make acquisitions is unproven. We may not be able to find suitable acquisition candidates and we may not be able to complete acquisitions or dispositions on favorable terms, if at all, even after devoting substantial resources to them. If we do complete acquisitions or dispositions, we cannot be sure that they will ultimately strengthen our competitive position or that they will not be viewed negatively by customers, financial markets, or investors. In addition, any acquisitions that we make could lead to difficulties in integrating personnel and operations from the acquired businesses and in retaining and motivating key personnel from these businesses. Acquisitions or dispositions may disrupt our ongoing operations, divert management from day-to-day responsibilities, increase our expenses, and adversely impact our operating results or financial condition. Future acquisitions may reduce our cash available for operations and other uses and could result in an increase in amortization expense related to identifiable assets acquired, potentially dilutive issuances of equity securities, or the incurrence of debt, any of which could adversely effect our financial condition and operating results.

Global or regional political and social conditions could adversely affect our operating results.

External factors such as geopolitical and social turmoil, terrorist attacks, and acts of war in those parts of the world that serve as markets for our products, such as North America, Europe, Asia, or elsewhere, could significantly adversely affect our business and operating results in ways that cannot be predicted. These uncertainties could make it difficult for the module manufacturers, OEMs, distributors, and contract manufacturers who purchase our products and for us to accurately plan future business activities. The occurrence of any of these events or circumstances could adversely affect our operating results.

We conduct substantially all of our design, marketing, and back-end test operations at our corporate headquarters in San Diego, California, and any fire, earthquakes, or other unanticipated events affecting our corporate headquarters could adversely impact our business, results of operations, or financial condition.

We conduct substantially all of our design, marketing, and back-end test operations at our corporate headquarters in San Diego, California. Our headquarters are subject to the risk of catastrophic loss due to unanticipated events such as fires or

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earthquakes. This facility and the equipment that we use there would be difficult to repair or replace and could require substantial lead time to do so. Any disruption or other unanticipated events affecting our corporate headquarters, and therefore our design, marketing, and back-end test operations, as well as administrative activities, would adversely impact our business, results of operations, and financial condition.

Our global business operations could be significantly impacted by natural disasters or global epidemics, or by interruptions resulting from manmade problems such as computer viruses or terrorism.

A number of our facilities and those of our third-party fabrication facilities are located in areas with above average seismic activity. Our primary facility and headquarters are located in San Diego, California, and we have an office in Tokyo, Japan for marketing and sales. We could suffer significant business disruption due to earthquakes, and the risk of an earthquake in Southern California or the Pacific Rim region is significant due to the proximity of major earthquake fault lines. We are not currently covered by insurance against business disruption caused by earthquakes. Furthermore, if our third-party fabrication facilities operated by LAPIS Semiconductor in Miyazaki, Japan, MagnaChip Semiconductor in Cheongju, South Korea, Global Foundries, Inc. in Singapore, or Silanna Semiconductor in Sydney, Australia were to experience any problems or downtime, including those caused by fire, earthquake, floods, or other natural disasters, we would be unable to meet our production targets and our business would be adversely affected. For example, although the LAPIS Semiconductor manufacturing facility was not directly impacted by the massive earthquake and tsunami that hit northeastern Japan on March 11, 2011, LAPIS Semiconductor or our other suppliers or customers located in Japan could have experienced serious production delays in the aftermath of the disaster resulting from supply disruptions, transportation difficulties in Japan, rationing of electricity, or other reasons. In addition, if any piece of equipment were to break down or experience down-time, it could cause our production lines to go down. There is no assurance that we would be able to secure replacement wafer production capacity on a timely basis or at all, or that if available, it could be obtained on favorable terms. In addition, our servers are vulnerable to computer viruses, break-ins, and similar disruptions from unauthorized tampering with our computer systems. In addition, acts of terrorism could cause disruptions in our business or the respective businesses of the module manufacturers, OEMs, distributors, and contract manufacturers, who purchase or sell our products, or the economy as a whole. To the extent that such disruptions result in delays or cancellations of orders by the module manufacturers, OEMs, distributors, or contract manufacturers or delays the deployment of our products, our business, results of operations, and financial condition could be adversely affected.

The occurrence of any of the foregoing or other natural or man-made disasters could cause damage or disruption to us, our employees, operations, distribution channels, markets, and customers, which could result in significant delays in deliveries or substantial shortages of our products and adversely affect our business, results of operations, financial condition, or prospects.

Our insurance may not cover all losses, including losses resulting from business disruption or product liability claims.

We have limited general liability or other business insurance coverage for our operations. In addition, we do not have any business insurance coverage for our operations to cover losses that may be caused by some natural disasters. Any occurrence of uncovered loss could harm our results of operations and financial condition.

Potential changes in our effective tax rate could harm our future operating results.

We are subject to income taxes in the U.S. and various foreign jurisdictions, and our domestic and international tax liabilities are subject to the allocation of expenses in differing jurisdictions. Our tax rate is affected by changes in the mix of earnings and losses in countries with differing statutory tax rates, research tax credits, certain non-deductible expenses including those arising from the requirement to expense stock options, and the valuation of deferred tax assets and liabilities, including our ability to utilize our net operating loss, or NOL, carryforwards. Increases in our effective tax rate could adversely impact our results of operations.

Risks Related to Intellectual Property

We are currently, and expect to be in the future, party to patent lawsuits and other intellectual property rights claims that are expensive and time consuming, and, if resolved adversely, could have a significant impact on our business, financial condition, or results of operations.

The semiconductor industry is characterized by frequent claims and litigation, including claims regarding patent and other intellectual property rights. We are presently involved in a patent infringement matter that we commenced, and we expect the number of patent and other intellectual property matters, including claims that may be asserted against us, to increase.

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On February 14, 2012, we filed a lawsuit in the U.S. District Court for the Central District of California, which was subsequently moved to the U.S. District Court for the Southern District of California. The action alleges the infringement of five of our patents relating to RFICs and switching technology by RFMD. The lawsuit alleges that certain of RFMD’s products infringe our patents relating to SOI design technology for RFICs and seeks, in addition to damages, to permanently enjoin RFMD from further infringement. On March 26, 2013, we filed an additional lawsuit against RFMD in the U.S. District Court for the Southern District of California alleging infringement of a sixth patent relating to RFICs and switching technology by RFMD. On April 25, 2013, we consolidated these two U.S. District Court actions into one lawsuit. On September 27, 2013, the U.S. District Court set a trial date for November 12, 2014. On December 12, 2013, RFMD filed a counterclaim alleging that we violate a patent owned or licensed by RFMD. Pursuing these actions is costly and could impose a significant burden on management and employees. We may receive unfavorable interim rulings in the course of this litigation and there can be no assurance that a favorable outcome will ultimately be obtained.

Prosecuting and defending intellectual property claims is costly and can impose a significant burden on management and employees, we may receive unfavorable preliminary or interim rulings in the course of litigation, and there can be no assurance that favorable final outcomes will be obtained in all cases, if any. We may decide to settle any such lawsuits and disputes on terms that are unfavorable to us. Similarly, if any litigation to which we are a party is resolved adversely, we may be subject to an unfavorable judgment that may not be reversed on appeal. The terms of such a settlement or judgment may require us to license our technology to third parties, cease some or all of our operations or pay substantial amounts to a counterparty to such litigation. Furthermore, in an infringement proceeding, a court may decide that a patent of ours is invalid and unenforceable, or may refuse to stop the other party from using the technology at issue on the grounds that our patents do not cover the technology in question. An adverse result in any litigation could put one or more of our patents at risk of being invalidated or interpreted narrowly. Our business, financial condition, or results of operations could be adversely affected as a result.

Claims by others that we infringe their proprietary technology could adversely affect our business.

In recent years there has been significant litigation involving intellectual property rights in many technology-based industries, including the semiconductor industry. Although we have not in the past been subject to claims that any of our products infringe any patents or other proprietary rights of third parties, we could be subject to such claims in the future. There can be no assurance that claims that may arise in the future can be amicably resolved, and it is possible that litigation could ensue. We do not know whether we would prevail in these proceedings given the complex technical issues and inherent uncertainties in intellectual property litigation.

Claims that our products, processes, or technology infringe third-party intellectual property rights, regardless of their merit or resolution, could be costly to defend or settle and could divert the efforts and attention of our management and technical personnel. If any pending or future proceedings result in an adverse outcome, we could be required to:

• cease the manufacture, use, or sale of the infringing products, processes, or technology;

• pay substantial damages for infringement;

• expend significant resources to develop non-infringing products, processes, or technology;

• license technology from the third-party claiming infringement, which license may not be available on commercially reasonable terms, or at all;

• cross-license our technology to a competitor to resolve an infringement claim, which could weaken our ability to compete with that competitor; or

• pay substantial damages to module manufacturers, OEMs, distributors, contract manufacturers, or end users to discontinue their use of or to replace infringing technology sold to them with non-infringing technology.

Any of the foregoing results could have a material adverse effect on our business, financial condition, and results of operations.

We could be required to incur significant costs to defend our intellectual property, which could have a negative impact on our business, financial condition, and results of operations.

We rely primarily on patent, copyright, trademark and trade secret laws, as well as nondisclosure and confidentiality agreements and other methods, to protect our proprietary information, technologies and processes, including our patent portfolio. Policing unauthorized use of our products, technologies and proprietary information is difficult and time consuming. We cannot be certain that the steps we have taken, or may take in the future, will prevent the misappropriation or unauthorized use of our proprietary information and technologies, particularly in foreign countries where the laws may not protect our

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proprietary intellectual property rights as fully as U.S. laws. We cannot be certain that the laws and policies of any country, including the United States, or the practices of any of the standard bodies, foreign or domestic, with respect to intellectual property enforcement or licensing or the adoption of standards, will not be changed in a way detrimental to the sale or use of our products or technology.

A substantial portion of our patents and patent applications relate to our UltraCMOS technology. We may need to litigate in the United States or elsewhere in the world to enforce our intellectual property rights, protect our trade secrets or determine the validity and scope of proprietary rights of others. As a result of any such litigation, we could lose our ability to enforce one or more patents or incur substantial unexpected operating costs. Any action we take to enforce our intellectual property rights could be costly and could absorb significant management time and attention, which, in turn, could negatively impact our operating results.

In addition, we license to certain of our foundry partners non-exclusive rights to manufacture and sell products using our technology in a particular field. In any potential dispute involving our patents or other intellectual property, our licensees could also become the target of litigation. We are bound to indemnify certain licensees under the terms of certain license agreements, and we may agree to indemnify others in the future. Our indemnification obligations could result in substantial expenses to us.

If we are unable to protect our intellectual property rights, our competitive position could be adversely impacted, or we could be required to incur significant expenses to enforce our rights.

We depend on our ability to protect our proprietary technology. We rely on trade secret, patent, and trademark laws and confidentiality agreements with employees and third parties, all of which offer only limited protection. We had more than 170 U.S. and international patents issued or pending as of December 28, 2013 and have emphasized patents as a source of significant competitive advantage. Despite our efforts, the steps we have taken to protect our proprietary rights may not be adequate to preclude misappropriation of our proprietary information or infringement of our intellectual property rights, and our ability to police such misappropriation or infringement is uncertain, particularly in certain foreign countries in which the laws may not protect our intellectual property rights to the same extent as they do in the U.S. We have not conducted an exhaustive search of existing patent rights; however, we are not aware of any patent rights or other intellectual property held by others that could impact our ability to operate. With respect to patent rights, we do not know whether any of our pending patent applications will result in the issuance of patents or whether the examination process will require us to narrow our claims, and even if patents are issued, they may be contested, circumvented, or invalidated. Moreover, the rights granted under any issued patents may not provide us with proprietary protection or competitive advantages, and, as with any technology, competitors may be able to develop similar or superior technologies to our own now or in the future. Protecting against the unauthorized use of our products, trademarks, and other proprietary rights is expensive, difficult and, in some cases, impossible. Litigation may be necessary in the future to enforce or defend our intellectual property rights, to protect our trade secrets, or to determine the validity and scope of the proprietary rights of others. For example, we filed a lawsuit in the U.S. District Court for the Central District of California alleging the infringement of our patents by RFMD. See Item 3, “Legal Proceedings,” for further discussion. Such litigation could result in substantial costs and diversion of management resources. Many of our current and potential competitors have the ability to dedicate substantially greater resources to enforce their intellectual property rights than we do. Accordingly, despite our efforts, we may not be able to prevent third parties from infringing upon or misappropriating our intellectual property.

Risks Related to Government Regulation

If we fail to comply with government contracting regulations, we could suffer a loss of net revenue or incur price adjustments or other penalties.

Some of our net revenue is derived from contracts with agencies of the U.S. government and subcontracts with its prime contractors as well as contracts and grants with other governments. As a U.S. government contractor or subcontractor, we are subject to federal contracting regulations, including the Federal Acquisition Regulations, which govern the allowability of costs incurred by us in the performance of U.S. government contracts. We must comply with these regulations in order to bid successfully for government contracts.

Additionally, the U.S. government is entitled after final payment on certain negotiated contracts to examine all of our cost records with respect to such contracts and to seek a downward adjustment to the price of the contract if it determines that we failed to furnish complete, accurate, and current cost or pricing data in connection with the negotiation of the price of the contract.

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In connection with our U.S. and other government business, we are also subject to government review and approval of our policies, procedures, and internal controls for compliance with procurement regulations and applicable laws. In certain circumstances in which a contractor has not complied with the terms of a contract or with regulations or statutes, the contractor might be debarred or suspended from obtaining future contracts for a specified period of time, or could be subject to downward contract price adjustments, refund obligations or civil and criminal penalties. Any such suspension or debarment or other sanction could have an adverse effect on our operating results.

Our U.S. and other government contracts and subcontracts typically can be terminated by the government for its convenience. If a U.S. government contract is terminated for the convenience of the government, we may not be entitled to recover more than our costs incurred or committed, settlement expenses, and profit on work completed prior to termination.

Under some of our government subcontracts, we are required to maintain secure facilities and to obtain security clearances for personnel involved in performance of the contract, in compliance with applicable federal standards. If we were unable to comply with these requirements, or if personnel critical to our performance of these contracts were to lose their security clearances, we might be unable to perform these contracts or compete for other projects of this nature, which could adversely affect our net revenue.

If we fail to comply with environmental regulations we could be subject to substantial fines or be required to suspend production, alter manufacturing processes, or cease operations.

We and our foundry partners are subject to a variety of international, federal, state, and local governmental regulations relating to the storage, discharge, handling, generation, disposal, and labeling of toxic or other hazardous substances used to manufacture our products. If we and our foundry partners fail to comply with these regulations, substantial fines could be imposed on us, and we could be required to suspend production, alter manufacturing processes, or cease operations, any of which could have a negative effect on our sales, income, and business operations. Failure to comply with environmental regulations could subject us to civil or criminal sanctions and property damage or personal injury claims. Furthermore, environmental laws and regulations could become more stringent over time, imposing even greater compliance costs and increasing risks and penalties associated with violations, which could seriously harm our financial condition and results of operations.

If we fail to comply with anti-bribery laws, including the U.S. Foreign Corrupt Practices Act, or FCPA, we could be subject to civil and/or criminal penalties.

As a result of our international operations we are subject to anti-bribery laws, including the FCPA, which prohibits companies from making improper payments to foreign officials for the purpose of obtaining or keeping business. If we fail to comply with these laws, the U.S. Department of Justice, the Securities and Exchange Commission, or SEC, or other U.S. or foreign governmental authorities could seek civil and/or criminal sanctions, including monetary fines and penalties against us or our employees, as well as additional changes to our business practices and compliance programs, which could have a material adverse effect on our business, results of operations, or financial condition.

Risks Relating to Securities Markets and Investment in Our Stock

The market price of our common stock may be volatile, which could result in substantial losses for investors.

Fluctuations in market price and volume are particularly common among securities of technology companies. The market price of our common stock may fluctuate significantly in response to the factors described in this Part I, Item 1A as well as the following factors, among others, some of which are beyond our control:

• general market conditions;

• domestic and international economic factors unrelated to our performance;

• actual or anticipated fluctuations in our quarterly operating results;

• changes in or failure to meet publicly disclosed expectations as to our future financial performance;

• changes in securities analysts’ estimates of our financial performance or lack of research and reports by industry analysts;

• changes in market valuations or earnings of similar companies;

• announcements by us or our competitors of significant products, contracts, acquisitions, or strategic partnerships;

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• developments or disputes concerning patents or proprietary rights, including increases or decreases in litigation expenses associated with intellectual property lawsuits we may initiate, or in which we may be named as defendants;

• failure to complete significant sales;

• any future sales of our common stock or other securities; and

• additions or departures of key personnel.

Future sales of shares by existing stockholders could cause our stock price to decline.

In the future, we may issue additional shares of common stock or other equity or debt securities convertible into common stock in connection with a financing, acquisition, litigation settlement, employee arrangement, issuance under our equity incentive plans, or otherwise. Any such issuance could result in substantial dilution to our existing stockholders and could cause the trading price of our common stock to decline. For example, our existing stockholders would suffer dilution upon exercise of options to purchase common stock under our equity incentive plans.

If securities or industry analysts do not publish research or publish misleading or unfavorable research about our business, our stock price and trading volume could decline.

The trading market for our common stock will depend in part on the research and reports that securities or industry analysts publish about us or our business. A small number of securities analysts’ commenced coverage of us after the closing of our IPO. If one or more of the analysts who covers us downgrades our stock or publishes misleading or unfavorable research about our business, our stock price would likely decline. If one or more of these analysts ceases coverage of our company or fails to publish reports on us regularly, demand for our stock could decrease, which could cause our stock price or trading volume to decline.

Insiders have substantial control over us which could limit your ability to influence corporate matters.

As of December 28, 2013, our directors and executive officers and their affiliates beneficially owned, in the aggregate, approximately 21% of our outstanding common stock. As a result, these stockholders, if acting together, are able to exercise significant influence over all matters requiring stockholder approval, including the election of directors and approval of significant corporate transactions, such as a merger or other sale of our company or its assets. This concentration of ownership could limit your ability to influence corporate matters and may have the effect of delaying or preventing a third-party from acquiring control over us.

Our actual operating results may differ significantly from our guidance and investor expectations, causing our stock price to decline.

From time to time, we may release guidance in our earnings releases, earnings conference calls or otherwise, regarding our future performance that represent our management’s estimates as of the date of release. If given, this guidance, which will include forward-looking statements, will be based on projections prepared by our management. Projections are based upon a number of assumptions and estimates that, while presented with numerical specificity, are inherently subject to significant business, economic and competitive uncertainties and contingencies, many of which are beyond our control. The principal reason that we expect to release guidance is to provide a basis for our management to discuss our business outlook with analysts and investors. With or without our guidance, analysts and other investors may publish expectations regarding our business, financial performance and results of operations. We do not accept any responsibility for any projections or reports published by any such third persons.

Guidance is necessarily speculative in nature and it can be expected that some or all of the assumptions of the guidance furnished by us will not materialize or will vary significantly from actual results. If our actual performance does not meet or exceed our guidance or investor expectations, the trading price of our common stock is likely to decline.

We are incurring increased costs and demands upon management as a result of complying with the laws and regulations affecting public companies, which could adversely affect our operating results.

As a public company we are incurring significant legal, accounting, and other expenses that we did not incur as a private company, including costs associated with public company reporting requirements. We also have incurred and will incur costs associated with corporate governance requirements, including requirements under the Sarbanes-Oxley Act of 2002, as well as new rules implemented by the SEC or Nasdaq. In addition, our management team will also have to adapt to the

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requirements of being a public company. The expenses incurred by public companies generally for reporting and corporate governance purposes have been increasing. We expect compliance with these rules and regulations to increase our legal and financial compliance costs and to make some activities more time-consuming and costly, although we are unable to currently estimate these costs with any degree of certainty. We also expect these rules and regulations 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 policy limits and coverage or incur substantially higher costs to obtain the same or similar coverage than used to be available. As a result, it may be more difficult for us to attract and retain qualified individuals to serve on our board of directors or as our executive officers.

However, for as long as we remain an “emerging growth company” as defined in the Jumpstart Our Business Startups Act of 2012, or the JOBS Act, we intend to take advantage of certain exemptions from various reporting requirements that are applicable to other public companies that are not “emerging growth companies” including, but not limited to, not being required to comply with the auditor attestation requirements of Section 404 of the Sarbanes-Oxley Act of 2002, reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements, and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and stockholder approval of any golden parachute payments not previously approved. We intend to take advantage of these reporting exemptions until we are no longer an “emerging growth company.”

Under the JOBS Act, “emerging growth companies” can delay adopting new or revised accounting standards until such time as those standards apply to private companies. We have irrevocably elected not to avail ourself of this exemption from new or revised accounting standards and, therefore, we will be subject to the same new or revised accounting standards as other public companies that are not “emerging growth companies.” We will remain an “emerging growth company” for up to five years, or until the earliest of (i) the last day of the first fiscal year in which our annual gross revenues exceed $1 billion, (ii) the date that we become a “large accelerated filer” as defined in Rule 12b-2 under the Exchange Act, which would occur if the market value of our common stock that is held by non-affiliates exceeds $700 million as of the last business day of our most recently completed second fiscal quarter, or (iii) the date on which we have issued more than $1 billion in non-convertible debt during the preceding three year period.

After we are no longer an “emerging growth company,” we expect to incur significant expenses and devote substantial management effort toward ensuring compliance with the requirements of Section 404 of the Sarbanes-Oxley Act of 2002, when applicable to us. In that regard, we currently do not have an internal audit function, and we will need to hire additional accounting and financial staff with appropriate public company experience and technical accounting knowledge. We cannot predict or estimate the amount of additional costs we may incur as a result of becoming a public company or the timing of such costs. We also expect that operating as a public company will make it more difficult and more expensive for us to obtain director and officer liability insurance, and we may be required to accept reduced policy limits and coverage or incur substantially higher costs to obtain the same or similar coverage. As a result, it may be more difficult for us to attract and retain qualified people to serve on our board of directors, our board committees, or as executive officers.

We are required to evaluate our internal control over financial reporting under Section 404 of the Sarbanes-Oxley Act of 2002, and any adverse results from such evaluation could result in a loss of investor confidence in our financial reports and have an adverse effect on our stock price.

Pursuant to Section 404 of the Sarbanes-Oxley Act of 2002, we are required to furnish a report by our management on our internal control over financial reporting. Such report contains, among other matters, an assessment of the effectiveness of our internal control over financial reporting as of the end of our fiscal year, including a statement as to whether or not our internal control over financial reporting is effective. This assessment includes disclosure of any material weaknesses in our internal control over financial reporting identified by management. If we are unable to assert that our internal control over financial reporting is effective, we could lose investor confidence in the accuracy and completeness of our financial reports, which could have an adverse effect on our stock price. Furthermore, as a result of the extended time period afforded us as a newly public company, the effectiveness of our internal control over financial reporting may not be as transparent to our investors as they may otherwise expect of a public reporting company, which could further impact investor confidence in the accuracy and completeness of our financial reports.

Our independent registered public accounting firm is not required to formally attest to the effectiveness of our internal control over financial reporting until we are no longer an “emerging growth company.” At such time, our independent registered public accounting firm may issue a report that is adverse in the event it is not satisfied with the level at which our controls are documented, designed or operating. Our remediation efforts may not enable us to avoid a material weakness in the future.

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We are an “emerging growth company” and we cannot be certain if the reduced disclosure requirements applicable to emerging growth companies will make our common stock less attractive to investors.

We are an “emerging growth company,” as defined in the JOBS Act, and we intend to take advantage of certain exemptions from various reporting requirements that are applicable to other public companies that are not “emerging growth companies” including, but not limited to, not being required to comply with the auditor attestation requirements of section 404 of the Sarbanes-Oxley Act of 2002, reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements, and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and stockholder approval of any golden parachute payments not previously approved. We cannot predict if investors will find our common stock less attractive because we will rely on these exemptions. If some investors find our common stock less attractive as a result, there may be a less active trading market for our common stock and our stock price may be more volatile.

If we need additional capital in the future, it may not be available on favorable terms, or at all.

We have financed our operations primarily through the sale of convertible preferred stock, equipment term notes and leases, a credit facility, and in fiscal 2012, by cash generated from operations and proceeds from our IPO. However, we may require additional capital from equity or debt financing in the future to fund our operations, respond to competitive pressures, or strategic opportunities. Our continued growth is dependent upon increasing revenues and managing working capital to a level that is adequate to support our increased cost structure or obtaining adequate debt financing to fulfill our obligations as they become due. If we are unable to successfully manage our working capital and require additional financing, we may not be able to secure timely additional financing on favorable terms, or at all. The terms of additional financing may place limits on our financial and operating flexibility. If we raise additional funds through further issuances of equity, convertible debt securities, or other securities convertible into equity, our existing stockholders could suffer significant dilution in their percentage ownership of our company, and any new securities we issue could have rights, preferences, and privileges senior to those of holders of our common stock. In addition, the terms of any new debt financing may include negative covenants or other restrictions on our business that could impair our operational flexibility, and would also require us to incur interest expense. If we are unable to obtain adequate financing or financing on terms satisfactory to us, if and when we require it, our ability to grow or support our business and to respond to business challenges could be significantly limited.

We could be the subject of securities class action litigation due to future stock price volatility, which could divert management’s attention and adversely affect our results of operations.

The stock market in general, and market prices for the securities of technology companies like ours in particular, have from time to time experienced volatility that often has been unrelated to the operating performance of the underlying companies. A certain degree of stock price volatility can be attributed to being a newly public company. These broad market and industry fluctuations may adversely affect the market price of our common stock, regardless of our operating performance. In several recent situations where the market price of a stock has been volatile, holders of that stock have instituted securities class action litigation against the company that issued the stock. If any of our stockholders were to bring a lawsuit against us, the defense and disposition of the lawsuit could be costly and divert the time and attention of our management and harm our operating results.

Anti-takeover provisions in our charter documents and Delaware law could discourage, delay, or prevent a change in control of our company and may affect the trading price of our common stock.

We are a Delaware corporation and the anti-takeover provisions of the Delaware General Corporation Law may discourage, delay, or prevent a change in control by prohibiting us from engaging in a business combination with an interested stockholder for a period of three years after the person becomes an interested stockholder, even if a change of control would be beneficial to our existing stockholders. In addition, our amended and restated certificate of incorporation and amended and restated bylaws may discourage, delay, or prevent a change in our management or control over us that stockholders may consider favorable. Our amended and restated certificate of incorporation and amended and restated bylaws:

• authorize the issuance of “blank check” preferred stock that could be issued by our board of directors to thwart a takeover attempt;

• establish a classified board of directors, as a result of which the successors to the directors whose terms have expired will be elected to serve from the time of election and qualification until the third annual meeting following their election;

• require that directors only be removed from office for cause;

• provide that vacancies on the board of directors, including newly-created directorships, may be filled only by a majority vote of directors then in office;

• limit who may call special meetings of stockholders;

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• prohibit stockholder action by written consent, thereby requiring all actions to be taken at a meeting of the stockholders; and

• require supermajority stockholder voting to effect certain amendments to our amended and restated certificate of incorporation and amended and restated bylaws.

Further significant changes in our stockholder composition may jeopardize our ability to use some or all of our net operating losses (NOL) and research tax credit carryforwards.

Pursuant to Sections 382 and 383 of the Internal Revenue Code, or the Code, annual use of our NOL and research tax credit carryforwards to offset future taxable income and tax, respectively, may be limited in the event of an ownership change as defined under Section 382 of the Code, which results from a cumulative change in ownership of 50% of certain stockholders occurring within a three-year period.

We completed a study to assess whether an ownership change has occurred since our formation through December 28, 2013. Based upon this study, we believe that several ownership changes have occurred.  We have reduced our deferred tax assets related to the NOL and R&D tax credit carryovers that are anticipated to expire unused as a result of the ownership changes. These tax attributes have been excluded from deferred tax assets with a corresponding reduction of the valuation allowance with no net effect on income tax expense or the effective tax rate. Future ownership changes may further limit our ability to utilize our remaining tax attributes. 

Future sales of our shares by, or changes in ownership of our existing significant stockholders could cause us to undergo an ownership change as defined under Section 382 of the Code. Consequently, whether we undergo an ownership change which results in a limitation on our ability to utilize our NOL and tax credit carryforwards may be a matter beyond our control.

If our income tax provisions taken in the U.S. and foreign countries are not sustained under examination by tax authorities in these jurisdictions, our results of operations could be adversely affected.

We are subject to income taxes in the U.S. and foreign countries, and are subject to routine corporate income tax audits in many of these jurisdictions. We believe that our tax return positions are fully supported, but tax authorities could challenge certain positions, which may not be fully sustained. However, our income tax expense includes amounts intended to satisfy income tax assessments that result from these challenges.

Determining the income tax expense for these potential assessments and recording the related assets and liabilities requires management judgment and estimates. We believe that our provision for uncertain tax positions, including related interest and penalties, is adequate based on information currently available to us. The amount ultimately paid upon resolution of audits could be materially different from the amounts previously included in income tax expense and therefore could have a material impact on our tax provision, net income and cash flows. Our overall provision requirement could change due to the issuance of new regulations or new case law, negotiations with tax authorities, resolution with respect to individual audit issues, or the entire audit, or the expiration of statutes of limitations.

We have never declared or paid dividends on our capital stock and we do not intend to do so for the foreseeable future.

We have never declared or paid dividends on our capital stock and we do not intend to do so for the foreseeable future. We currently intend to invest our future earnings, if any, to fund our growth. Additionally, the terms of our loan facility with Silicon Valley Bank restrict our ability to pay dividends. Therefore, investors in shares of our common stock will depend upon any future appreciation in our common stock’s value. There is no guarantee that shares of our common stock will appreciate in value or even maintain the price at which our stockholders have purchased their shares.

Item 1B. Unresolved Staff Comments

None.

Item 2. Properties

Our primary facilities and headquarters are located in San Diego, California in three leased buildings totaling 96,384 square feet. These facilities house our manufacturing and supply chain organization, research and design function, as well as the majority of our marketing, sales and administration functions. The lease expires at the end of December 2015. In addition, we lease facilities in the following locations: Arlington Heights, Illinois for product development, marketing, and sales; Reading, United Kingdom for product development, marketing and sales; and Seoul, Korea for marketing and sales. We believe that our leased facilities are adequate to meet our current needs and that additional facilities will be available on suitable, commercially reasonable terms to accommodate future needs.

Item 3. Legal Proceedings

On February 14, 2012, we filed a lawsuit in the U.S. District Court for the Central District of California, which was subsequently moved to the U.S. District Court for the Southern District of California. The action alleges the infringement of five of our patents relating to RFICs and switching technology by RFMD. The lawsuit alleges that certain of RFMD’s products infringe our patents relating to SOI design technology for RFICs and seeks, in addition to damages, to permanently enjoin RFMD from further infringement. On March 26, 2013, we filed an additional lawsuit against RFMD in the U.S. District Court for the Southern District of California alleging infringement of a sixth patent relating to RFICs and switching technology by RFMD. On April 25, 2013, we consolidated these two U.S. District Court actions into one lawsuit. On September 27, 2013, the U.S. District Court set a trial date for November 12, 2014. On December 12, 2013, RFMD filed a counterclaim alleging that we violate a patent owned or licensed by RFMD. Pursuing these actions is costly and could impose a significant burden on management and employees. We may receive unfavorable interim rulings in the course of this litigation and there can be no assurance that a favorable outcome will ultimately be obtained. We believe the outcome of this pending litigation will not have, individually or in the aggregate, a material adverse effect on our consolidated financial statements.

On November 14, 2013, representatives of the U.S. Department of Homeland Security (DHS), in collaboration with the United States Attorney’s Office for the Southern District of California (USAO), executed a federal search warrant at our San Diego facilities in connection with an investigation into exports and temporary imports of certain products sold in the aerospace market. We are cooperating fully with the USAO and DHS officials. No claims have been asserted and no amounts have been accrued for this contingency in the consolidated financial statements.

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The U.S. Department of State, Office of Defense Trade Controls Compliance (USDS), is conducting a review of our compliance with the Arms Export Control Act (AECA) and the AECA’s implementation of International Traffic In Arms Regulations (ITAR). Based on this review we could be subject to continued investigation and potential regulatory consequences related to these violations ranging from a no-action letter, government oversight of facilities and export transactions, monetary penalties of up to $0.5 million per violation, and in certain cases, debarment from government contracting, denial of export privileges, and criminal penalties. No claims have been asserted and no amounts have been accrued for this contingency in the consolidated financial statements. Furthermore, due to the preliminary nature of the investigation and the USDS review, it is not currently possible to estimate the likelihood of an unfavorable outcome or the possible loss or range of losses in the event of an unfavorable outcome.

From time to time, we are subject to various claims and suits arising in the ordinary course of business, including commercial, employment and environmental matters. We do not expect that the resolution of these matters will have a material adverse effect on its consolidated financial position or results of operations.

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 Purchase of Equity Securities

Market Information

Our common stock has been listed on the Nasdaq Global Market under the symbol “PSMI” since August 8, 2012. Prior to that date, there was no public trading market for our common stock. The following table sets forth for the periods indicated the high and low sales prices per share of our common stock as reported on the Nasdaq Global Market:

	High		Low
Fiscal Year Ended December 29, 2012:
Third Quarter (from August 8, 2012)	$	19.47	$	13.99
Fourth Quarter	$	18.96	$	13.85
Fiscal Year Ended December 28, 2013:
First Quarter	$	15.97	$	8.50
Second Quarter	$	11.37	$	9.12
Third Quarter	$	12.02	$	8.98
Fourth Quarter	$	9.23	$	7.41

As of December 28, 2013, we had approximately1,342 holders of record of our common stock. The actual number of stockholders is greater than this number of record holders, and includes stockholders who are beneficial owners, but whose shares are held in street name by brokers and other nominees. This number of holders of record also does not include stockholders whose shares may be held in trust by other entities.

Dividend Policy

We have never declared or paid cash dividends on our common or preferred stock. We currently intend to retain all available funds and any future earnings for use in the operation of our business and do not anticipate paying any cash dividends in the foreseeable future. Any future determination to declare cash dividends will be made at the discretion of our board of directors, subject to compliance with certain covenants under our loan facility with Silicon Valley Bank, which restrict or limit our ability to pay dividends, and will depend on our financial condition, results of operations, capital requirements, general business conditions, and other factors that our board of directors may deem relevant.

Equity Compensation Plan Information

For equity compensation plan information refer to Item 12 in Part III of this Annual Report on Form 10-K. Such information will be included in our Proxy Statement, which is incorporated herein by reference.

Performance Graph

This performance graph shall not be deemed “soliciting material” or to be “filed” with the Securities and Exchange Commission for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or the Exchange Act, or otherwise subject to the liabilities under that Section, and shall not be deemed to be incorporated by reference into any filing of Peregrine Semiconductor Corporation under the Securities Act of 1933, as amended, or the Securities Act.

The following graph shows a comparison from August 8, 2012 (the date our common stock commenced trading on the Nasdaq Global Market) through December 28, 2013 of the cumulative total return for our common stock, the Nasdaq Composite Index, and the Philadelphia Semiconductor Index. Such returns are based on historical results and are not intended to suggest future performance. Data for the Nasdaq Composite Index and the Philadelphia Semiconductor Index assume reinvestment of dividends. The graph assumes an investment of $100 on August 8, 2012, and the reinvestment of dividends. All returns are reported as of our fiscal month end, except for August 8, 2012, which was the date of our initial public offering.

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	Period Ending
	8/8/2012	9/28/2012	12/28/2012	3/28/2013	6/28/2013	9/27/2013	12/27/2013
Peregrine Semiconductor Corporation	100	121	104	70	78	64	53
Nasdaq Composite Index	100	103	98	109	113	126	138
Philadelphia Semiconductor Index	100	95	94	109	117	122	132

Item 6. Selected Financial Data

The following tables set forth selected consolidated financial data. We derived the selected consolidated statement of operations data for the years ended December 28, 2013, December 29, 2012, and December 31, 2011 and the selected consolidated balance sheet data as of December 28, 2013 and December 29, 2012 from our audited consolidated financial statements and related notes included elsewhere in this Annual Report on Form 10-K. Our historical results are not necessarily indicative of the results to be expected for any future period.

The following selected consolidated financial data should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and our consolidated financial statements and related notes included elsewhere in this Annual Report on Form 10-K.

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	Fiscal Years Ended
	December 28, 2013			December 29, 2012			December 31, 2011
	(in thousands, except per share amounts)
Consolidated Statement of Operations Data:
Net revenue	$	202,316		$	203,908		$	107,771
Cost of net revenue (1)	120,920			124,135			70,955
Gross profit	81,396			79,773			36,816
Operating expense:
Research and development (1)	42,192			34,134			22,730
Selling, general and administrative (1)	43,142			36,971			23,252
Total operating expense	85,334			71,105			45,982
Income (loss) from operations	(3,938		)	8,668			(9,166		)
Interest expense, net	(130		)	(1,354		)	(311		)
Other income (expense), net	84			(130		)	(9		)
Income (loss) before income taxes	(3,984		)	7,184			(9,486		)
Provision (benefit) for income taxes	67			(88		)	196
Net income (loss)	(4,051		)	7,272			(9,682		)
Net income allocable to preferred stockholders	—			(4,515		)	—
Net income (loss) attributable to common stockholders	$	(4,051	)	$	2,757		$	(9,682	)
Net income (loss) per share attributable to common stockholders:
Basic	$	(0.13	)	$	0.19		$	(3.57	)
Diluted	$	(0.13	)	$	0.15		$	(3.57	)
Shares used in computing net income (loss) per share:
Basic	32,294			14,291			2,715
Diluted	32,294			18,651			2,715

	As of
	December 28, 2013		December 29, 2012
	(in thousands)
Consolidated Balance Sheet Data:
Cash and cash equivalents	$	16,249	$	44,106
Marketable securities	46,923		49,253
Working capital	82,362		78,050
Total assets	160,875		197,918
Obligations under capital leases, less current portion	—		18
Stockholders’ equity	123,531		119,119

(1) Includes stock-based compensation expense related to options granted to employees and others as follows:

	Fiscal Years Ended
	December 28, 2013		December 29, 2012		December 31, 2011
	(in thousands)
Cost of net revenue	$	883	$	588	$	431
Research and development	2,097		1,419		762
Selling, general and administrative	3,635		2,430		1,891
Total	$	6,615	$	4,437	$	3,084

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

You should read the following discussion and analysis in conjunction with our Consolidated Financial Statements and related Notes thereto included in Part IV, Item 15 of this Report and the “Risk Factors” included in Part I, Item 1A of this Report, as well as other cautionary statements and risks described elsewhere in this Report, before deciding to purchase, hold or sell our common stock.

Overview

We are a fabless provider of high performance radio frequency integrated circuits, or RFICs. Our solutions leverage our proprietary UltraCMOS technology, which enables the design, manufacture, and integration of multiple radio frequency, or RF, mixed signal, and digital functions on a single chip. We believe our products deliver an industry leading combination of performance and monolithic integration. Our solutions target a broad range of applications in the space and military, broadband, industrial, mobile device, test and measurement equipment, and wireless infrastructure markets. We have shipped over two billion RFICs based on our UltraCMOS technology.

Our UltraCMOS technology combines the ability to achieve the high levels of performance of traditional specialty processes, with the fundamental benefits of standard complementary metal oxide semiconductor, or CMOS, the most widely used semiconductor process technology. UltraCMOS technology utilizes an insulating substrate to provide greatly reduced unwanted electrical interaction between the RFIC and the substrate (referred to as parasitic capacitance), which enables high signal isolation and excellent signal fidelity with low distortion over a broad frequency range (referred to as broadband linearity). These technical attributes result in RF devices with excellent high-frequency and power handling performance, as well as, reduced crosstalk between frequencies. In addition, increased broadband linearity enables faster data throughput and greater subscriber capacity over a wireless network, resulting in enhanced network efficiency. UltraCMOS technology also provides the benefits of standard CMOS, such as high levels of integration, low power consumption, reusable circuit libraries, widely available design tools and outsourced manufacturing capacity, and the ability to scale to smaller geometries. We own fundamental intellectual property, or IP, in UltraCMOS technology consisting of more than 170 U.S. and international issued and pending patents, and over 300 documented trade secrets covering basic circuit elements, RF circuit designs, manufacturing processes, and design know-how.

We leverage our extensive RF design expertise and systems knowledge to develop RFIC solutions that meet the stringent performance, integration, and reliability requirements of the rapidly evolving wireless markets. As of December 28, 2013, we offer a broad portfolio of more than 230 high performance RFICs including switches, digital attenuators, mixers / upconverters, prescalers, digitally tunable capacitors, or DTCs, and DC-DC converters, and we are currently developing power amplifiers, or PAs. During the year ended December 28, 2013, our products were sold to more than 1,700 module manufacturers, original equipment manufacturers, or OEMs, contract manufacturers, and other customers. We believe our RFICs are included in products sold by many of the leading mobile handset OEMs. Our net revenue was $202.3 million, $203.9 million, and $107.8 million for the years ended December 28, 2013, December 29, 2012, and December 31, 2011, respectively. We recorded net income of $7.3 million and $3.8 million for the years ended December 29, 2012 and December 25, 2010, respectively, and a net loss of $4.1 million and $9.7 million for the year ended December 28, 2013 and December 31, 2011, respectively. As of December 28, 2013, we had an accumulated deficit of $225.0 million.

Under the Jumpstart Our Business Startups Act of 2012, or the JOBS Act, “emerging growth companies” can delay adopting new or revised accounting standards until such time as those standards apply to private companies. We have irrevocably elected not to avail ourself of this exemption from new or revised accounting standards and, therefore, we will be subject to the same new or revised accounting standards as other public companies that are not “emerging growth companies.”

Subject to certain conditions set forth in the JOBS Act, as an emerging growth company, we intend to rely on certain of these exemptions, including without limitation, providing an auditor’s attestation report on our system of internal controls over financial reporting pursuant to Section 404 of the Sarbanes-Oxley Act of 2002 and complying with any requirements that may be adopted regarding mandatory audit firm rotation or a supplement to the auditor’s report providing additional information about the audit and the financial statements (auditor discussion and analysis). These exemptions will apply for a period of up to five years following the completion of our IPO, or until the earliest of (i) the last day of the first fiscal year in which our annual gross revenues exceed $1 billion, (ii) the date that we become a “large accelerated filer” as defined in Rule 12b-2 under the Exchange Act, which would occur if the market value of our common stock that is held by non-affiliates exceeds $700 million as of the last business day of our most recently completed second fiscal quarter, or (iii) the date on which we have issued more than $1 billion in non-convertible debt during the preceding three-year period.

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Key Financial Measures

Net Revenue. Our net revenue is comprised of product net revenue and other net revenue and is derived primarily from the sale of our products, which include both our application specific standard products and customer specific standard products. We develop application specific standard products from our own specifications, and we sell these products using our direct sales force, our network of sales representatives, and our distributors. For higher volume markets, we also develop customer specific standard products to meet the specialized requirements of individual customers, and we sell these products using our direct and indirect sales organization. We sell our products worldwide through our direct sales force and field applications engineering staff, our network of domestic and international independent sales representatives, and both worldwide and regional distribution partners. Each of these channels is supported by our customer service and marketing organizations. Prior to a customer’s selection and purchase of our products, our direct sales force and field applications engineers provide our customers technical assistance in the use of our RFICs for the design of their products. Our network of sales representatives and distributors have been selected based on their focus on and knowledge of RFICs, their ability to provide a high level of field application engineering support or their regional logistical support capabilities. We provide ongoing technical training for new products to our sales representatives and distributors to keep them informed of product enhancements and new product releases. We share product information and technical specifications with our customers using web-based tools. We plan to expand our direct sales and support capabilities and our network of independent sales representatives in key regions domestically and internationally.

To sell our products, we use various sales channels depending on the type of customer (module manufacturer, OEM, or contract manufacturer), the volume and types of products purchased by the customer, and the location of the customer. For larger module manufacturer and OEM customers, we sell our products through both our direct sales force and our sales representatives. For sale of products to Asia-based customers, we use a logistics provider and distributor to facilitate local stocking of our products to meet changes in demand, and to facilitate the billing, customs, and duties administration for these transactions. For customers that order less frequently, we use distributors on a worldwide basis as our sales channel. We monitor the purchase levels of the end customers of our distributors, and from time-to-time we may convert these end customers to direct customers to the extent that their unit volume and sales support requirements justify selling to them directly.

We also receive a portion of our net revenue from customer or government sponsored research and development activities, and from wafer services provided to third-parties who develop their own ICs using our UltraCMOS processes, both of which we refer to as “other net revenue.” Research and development activities range from development activities to investigate technological capabilities, in which we receive funded research for IC design techniques or new semiconductor technologies at the request of a customer, to custom development projects in which we are paid to enhance or modify an existing product or develop a new product to meet a customer’s specifications. The amount of this type of net revenue we record in any period is not expected to be significant, and the amount recorded will vary from period to period depending on the timing of third-party development activity opportunities, and the related effort we incur in each period.

Our net revenue has grown rapidly in previous years, but this growth has slowed and our net revenue declined in fiscal 2013 compared to fiscal 2012. The principal driver of our net revenue growth has been the increased volume of sales of our products, which is attributable to the increasing breadth and diversity of our product offerings, the growing market demand of products we introduced in prior periods, and the expansion of our domestic and international sales efforts. More recently, our net revenue declined due to reductions in our average selling prices and changes to our end markets. Our customers generally do not enter into long-term contracts with us. Our commercial relationships with our customers vary from single small low volume purchases of our products through a distributor to large volume purchases of our products directly from us. Large volume customers typically provide longer term forecasts of their expected needs. These forecasts do not commit the customer to minimum purchases, and generally may be revised without penalty.

A significant portion of our net revenue in each quarter is attributable to purchase orders for products that are received and fulfilled within the same quarter, often including a large number of orders from diverse customers and end markets. Our forecasting of sales of products takes into account a number of factors, including historical sales patterns for each individual product, our assessment of overall market conditions, and our knowledge of the current requirements and purchasing practices of our larger customers.

Although we believe we have multiple opportunities for additional net revenue growth and are planning our business accordingly, our future net revenue levels will be impacted by our ability to achieve design wins with module manufacturers and OEMs, as well as the success of OEM devices that incorporate our products. A large portion of our shipments are made to intermediary manufacturers, such as module manufacturers and contract manufacturers, who incorporate our product into their products, which are in turn sold to OEMs. OEMs have a variety of alternative solutions available to meet their needs, and often diversify their supply chain by ordering products from more than one module or contract manufacturer, and shifting demand between them to achieve cost reductions and performance improvements. As the end markets where our

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products are used are very competitive, we expect to experience shifts in our net revenue between customers and regions where we ship products, and changes in demand for our products as a result of module manufacturer or OEM changes in designs and supply chain decisions.

Although we have shipped our products to a large number of customers, we have historically depended on a small number of customers for a significant percentage of our annual net revenue. The composition of this group can change from year-to-year. Net revenue derived from our three largest direct customers as a percentage of our annual net revenue was 83%, 85%, and 68% for the years ended December 28, 2013, December 29, 2012, and December 31, 2011, respectively. Included in these percentages for our three largest direct customers are sales to two of our distributors. Based on records from our distributors of shipments to their customers, net revenue derived from our three largest end customers as a percentage of annual net revenue was 73%, 73%, and 49% for the years ended December 28, 2013, December 29, 2012, and December 31, 2011, respectively. While the composition of our top customers varies from year-to-year, we expect that shipments to a limited number of customers will continue to account for a significant percentage of our net revenue for the foreseeable future. Our largest customers typically use our products in multiple systems or programs for different OEM end customers, each having differing product life cycles, end users, and market dynamics.

Cost of Net Revenue. Cost of net revenue consists primarily of substrates, wafer processing, and testing and packaging. Cost of net revenue also includes manufacturing related personnel costs, which include stock-based compensation expenses, facilities, supplies and equipment costs, and quality assurance costs.

One of our most important objectives is maintaining and improving our gross margin, which we define as gross

profit expressed as a percentage of our net revenue. Our total gross margin in any period can be materially affected by product

mix, that is, the percentage of our net revenue in that period that is attributable to higher or lower margin products, and by other

factors, some of which are not under our control. Due to these factors, our gross margins have fluctuated from quarter-to-quarter. For example, gross margin was negatively impacted during the quarter ended December 28, 2013 due to a reduction in the carrying value of inventory as a result of a lower of cost or market valuation and excess and obsolete inventory write-downs.

The factors that can influence the gross margins of any individual product, include the following:

• the pricing that the features and performance of our products can command;

• the volume of products produced absorbing manufacturing overhead structure for procurement, test, and quality support, and their related costs;

• write-downs of inventory;

• the competitive pressures on the pricing of our products from similar product offerings from other semiconductor manufacturers; and

• the costs and yields of wafers, packages, and other materials used in manufacturing our products; fabrication costs; assembly and test costs; factory equipment utilization; and operating efficiencies.

Research and Development. Research and development expense consists primarily of personnel-related expenses of our research and development organization, which include stock-based compensation expense, and costs for development wafers and mask sets, license fees for computer-aided design software, costs of development testing and evaluation, and allocated facilities costs. We incur research and development costs for the development of our products and for improvements of our UltraCMOS technology.

Selling, General and Administrative. Selling, general and administrative expense includes personnel related costs, which include stock-based compensation expense, and sales commissions paid to our independent sales representatives, costs of advertising and corporate marketing promotions, travel costs, professional and consulting fees, legal fees, allocated facilities costs and other corporate expenses.

Interest Expense, Net. Interest expense, net reflects interest expense associated with borrowings, imputed interest on capital leases and customer deposit financing arrangement, and changes in fair value of warrant liabilities, offset by interest income earned on our cash, cash equivalent, and marketable securities balances.

Other Expense, Net. Other expense, net consists of currency gains and losses on conversion of non-U.S. dollar transactions into U.S. dollars and other income (expense) generated from minor non-operating transactions.

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Provision for Income Taxes. The provision for income taxes consists of our estimated federal, state and foreign income taxes based on our pre-tax income. We have recorded a valuation allowance for the full amount of our domestic net deferred tax assets, as the realization of our domestic net deferred tax assets is uncertain.

At December 28, 2013, we have U.S. federal and state NOL carryforwards of approximately $147.6 million and $102.5 million, respectively, after taking into consideration the impact of Code Section 382 as discussed below. The federal NOL carryforwards will expire between 2018 and 2031, unless previously utilized. The state NOL carryforwards will expire between 2014 and 2031, unless previously utilized. We have federal and state research tax credit carryforwards of approximately $7.2 million and $9.9 million, respectively, at December 28, 2013. The federal credits will begin to expire in 2024. The state credits do not expire.

Pursuant to Code Sections 382 and 383, annual use of our NOL and research and development tax credit carryforwards may be limited in the event a cumulative change in ownership of 50% of certain stockholders occurs within a three year period. An ownership change may limit the amount of NOL and research tax credit carryforwards that can be utilized annually to offset future taxable income and tax, respectively. In general, an “ownership change” as defined by Section 382 of the Code, results from a transaction or series of transactions over a three-year period resulting in an ownership change of more than 50 percentage points of the outstanding stock of a company by certain stockholders.

We completed a study to assess whether an ownership change has occurred since the our formation through December 28, 2013. Based upon this study, we believe that several ownership changes have occurred.  We have reduced our deferred tax assets related to the NOL and research tax credit carryovers that are anticipated to expire unused as a result of the ownership changes. These tax attributes have been excluded from deferred tax assets with a corresponding reduction of the valuation allowance with no net effect on income tax expense or the effective tax rate. Future ownership changes may further limit our ability to utilize our remaining tax attributes. 

Restructuring. On January 30, 2014, we approved a restructuring plan. The plan consists of a reduction in force which will be substantially completed by the end of the first quarter of 2014. The total charge resulting from this plan is expected to be approximately $1.5 million to $2.0 million.

Critical Accounting Policies and Estimates

Our consolidated financial statements and related notes included elsewhere in this Form 10-K are prepared in accordance with U.S. generally accepted accounting principles. The preparation of these consolidated financial statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, net revenue, and expenses, and any related disclosures. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances. Changes in accounting estimates are reasonably likely to occur from period to period. Accordingly, actual results could differ significantly from the estimates made by our management. We evaluate our estimates and assumptions on an ongoing basis. To the extent that there are material differences between these estimates and our actual results, our future financial statement presentation, financial condition, results of operations, and cash flows will be affected.

We believe that the following accounting policies involve a greater degree of judgment and complexity than our other accounting policies. Accordingly, these are the policies we believe are the most critical to understanding and evaluating our consolidated financial condition and results of operations.

Revenue Recognition

Our net revenue is primarily generated from sales of RFICs. We recognize net revenue when each of the following have occurred: (1) there is persuasive evidence that an arrangement with our customer exists, which is generally a customer purchase order; (2) the products are delivered, which generally occurs when the products are shipped and title and risk of loss has been transferred to the customer; (3) the selling price is fixed or determinable; and (4) collection of the customer receivable is deemed reasonably assured.

We record revenue based on facts available at the time of sale. Amounts that are not probable of collection once the product has shipped and title has transferred to the customer are deferred until the amount that is probable of collection can be determined. Items that are considered when determining the amounts that will be ultimately collected are the customer’s overall creditworthiness and payment history.

For distributors with rights of return, revenue is not recognized until product is shipped to the end customer of the distributor and the amount that will ultimately be collected is determinable. We offer our distributors limited stock rotation, price protection, and in some situations, credits on pricing depending on their end customer (ship and debit credits). For these

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distributors revenue is not recognized until product is shipped to the end customer of the distributor and the amount that will ultimately be collected is determinable. On shipments where net revenue is not recognized, we record an accounts receivable and deferred revenue for the selling price as there is a legally enforceable right to payment. Inventory at distributors remains on our books at carrying value until sold by the distributor at which time we recognize the net revenue and cost of net revenue. Revenues to these distributors are recorded net of any pricing adjustments for price protection or ship and debit credits in the same period as the sale of goods to their customers. The amount of any pricing adjustment is based on the difference between the price at which the distributor originally purchased our inventory and either: (1) a lower distribution price then being offered on those products for price protection; or (2) a special price offered to the distributor in order to meet competitive pressures in the marketplace for ship and debit credits. We do not currently offer rebates or other pricing incentives, except for volume purchase pricing at the time of sale, to direct customers or distributors.

We also maintain an allowance for doubtful accounts for estimated losses resulting from the inability of customers to make required payments. If the financial condition of any customer were to deteriorate, resulting in an impairment of its ability to make payments, additional allowances could be required.

Inventory Valuation

We continually assess the recoverability of our inventory based on assumptions about demand and market conditions. Forecasted demand is determined based on historical sales and expected future sales. We state our inventory at the lower of cost or market value, with cost determined on a first-in, first-out basis. We record reductions to the carrying value of our inventory to account for its obsolescence or lack of marketability. Reductions are calculated as the difference between the cost of inventory and the estimated market value based upon assumptions about future demand and market conditions. Determination of the market value may be complex, and therefore requires management to make assumptions and to apply judgment. In order for management to make the appropriate determination of market value, the following items are commonly considered: inventory turnover statistics; inventory quantities on hand in our facilities and customer inventories; unfilled customer order quantities; forecasted customer demand; competitive pricing; seasonality factors; consumer trends; and performance of similar products or accessories. Subsequent changes in facts or circumstances do not result in the reversal of previously recorded reserves. If actual market conditions are less favorable than those projected by management, additional inventory write-downs may be required that may adversely affect our operating results. If actual market conditions are more favorable, we may have higher gross profits when products are sold.

Income Taxes

We account for income taxes under the asset and liability approach. We record a valuation allowance to reduce our deferred tax assets to the amount we believe is more likely than not to be realized. In assessing the need for a valuation allowance, we consider all positive and negative evidence, including scheduled reversals of deferred tax liabilities, projected future taxable income, tax planning strategies, and recent financial performance. Forming a conclusion that a valuation allowance is not required is difficult when there is negative evidence such as cumulative losses in recent years. We are in a three-year cumulative loss position, and have concluded that a full valuation allowance against our net deferred tax assets is appropriate given our recent history of losses and uncertainties regarding our ability to generate future taxable income sufficient to utilize existing deferred tax assets prior to their expiration. In foreign jurisdictions we do not have cumulative losses, and we have not recorded a valuation allowance to reduce our net deferred tax assets. Realization of our deferred tax assets is dependent primarily upon our future U.S. taxable income. Our judgments regarding our future profitability may change due to the trend of our operating results, future market conditions, changes in U.S. or international tax laws, and other factors. These changes, if any, may require possible material adjustments to these deferred tax assets, resulting in a reduction in net income or an increase in net loss in the period when such determinations are made.

We are subject to income taxes in the U.S. and foreign countries, and to routine corporate income tax audits in many of these jurisdictions. We believe that our tax return positions are fully supported, but tax authorities could challenge certain positions, which may not be fully sustained. However, our income tax expense includes amounts intended to satisfy income tax assessments that result from these challenges. Determining the income tax expense for these potential assessments and recording the related assets and liabilities requires management judgment and estimates. We believe that our provision for uncertain tax positions, including related interest and penalties, is adequate based on information currently available to us. The amount ultimately paid upon resolution of audits could be materially different from the amounts previously included in income tax expense and therefore could have a material impact on our tax provision, net income and cash flows. Our overall provision requirement could change due to the issuance of new regulations or new case law, negotiations with tax authorities, resolution with respect to individual audit issues, or the entire audit, or the expiration of statutes of limitations.

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Stock-Based Compensation

We measure stock-based compensation cost at the grant date, based on the estimated fair value of the award. The fair value of each option award is estimated on the date of grant using the Black-Scholes option pricing model. The Black-Scholes option pricing model requires us to estimate certain key assumptions including future stock price volatility, expected term of the options, risk free interest rates, and dividend yields. The resulting cost is recognized over the period during which the employee is required to provide services in exchange for the award, which is usually the vesting period. We recognize compensation expense over the vesting period using the straight-line method and classify these amounts in the statement of operations based on the department to which the related employee is assigned.

Stock options issued to non-employees are accounted for at their estimated fair value determined using the Black-Scholes option pricing model. The fair value of options granted to non-employees is re-measured as they vest, and the resulting increase in value, if any, is recognized as expense during the period the related services are rendered.

For the years ended December 28, 2013, December 29, 2012, and December 31, 2011, we estimated the grant date fair value of stock options using the Black-Scholes option pricing model with the following weighted-average assumptions:

	Fiscal Years Ended
	December 28, 2013		December 29, 2012		December 31, 2011
Risk-free interest rate	0.80	%	0.72	%	1.26	%
Dividend yield	—		—		—
Expected term (years)	5.00		5.00		5.24
Volatility	61	%	62	%	61	%

We based our expected volatility on the expected volatilities of a peer group of public companies within the semiconductor industry that are similar except for having publicly traded securities. We also utilize data of peer companies to determine the weighted average expected term in an effort to better align the expected term of our options with the term experienced by our peers. When making the selections of our industry peer companies to be used in our expected term and volatility determination, we also considered the stage of development, size, and financial leverage of such peer companies. We derived the risk-free interest rate assumption from the yield as of the grant date for U.S. Treasury zero-coupon bonds with maturities similar to those of the expected term of the award being valued. We based the assumed dividend yield on the expectation that we will not pay cash dividends in the foreseeable future. We will continue to use judgment in evaluating the expected term, volatility, and risk-free interest rate related to our stock-based compensation on a prospective basis and incorporating these factors in the Black-Scholes option pricing model.

We estimated forfeitures at the time of grant and will revise these estimates, if necessary, in subsequent periods if actual forfeitures differ from those estimates. We utilized our historical forfeiture rates to estimate our future forfeiture rate. We will continue to evaluate the appropriateness of estimating the forfeiture rate based on actual forfeiture experience, analysis of employee turnover behavior, and other factors. Quarterly changes in the estimated forfeiture rate can have a significant effect on stock-based compensation expense as the cumulative effect of adjusting the rate for all stock-based compensation expense amortization is recognized in the period the forfeiture estimate is changed. If a revised forfeiture rate is higher than the previously estimated forfeiture rate, an adjustment is made that will result in a decrease to the stock-based compensation expense recognized in the consolidated financial statements. If a revised forfeiture rate is lower than the previously estimated forfeiture rate, an adjustment is made that will result in an increase to the stock-based compensation expense recognized in the consolidated financial statements. The effect of forfeiture adjustments during fiscal 2013, 2012 and 2011 was insignificant.

If in the future we determine that other methods are more reasonable, or other methods for calculating these assumptions are prescribed by authoritative guidance, the fair value calculated for our stock options could change significantly. Higher volatility and longer expected award lives result in an increase to stock-based compensation expense determined at the date of grant. Stock-based compensation expense affects our cost of net revenue, research and development expense, and our selling, general and administrative expense.

As a result of our fair value calculations using Black-Scholes option pricing model and the allocation of value to the vesting periods using the straight-line vesting attribution method, we recognized employee stock-based compensation in the statements of operations as follows:

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	Fiscal Years Ended
	December 28, 2013		December 29, 2012		December 31, 2011
	(in thousands)
Cost of net revenue	$	883	$	588	$	431
Research and development	2,097		1,419		762
Selling, general and administrative	3,635		2,430		1,891
Total	$	6,615	$	4,437	$	3,084

The total compensation cost related to unvested stock option grants not yet recognized as of December 28, 2013 was $13.1 million, and the weighted-average period over which these grants are expected to vest is 2.1 years.

The intrinsic value of stock options outstanding at December 28, 2013 was $19.9 million, of which $19.7 million and $0.2 million related to stock options that were vested and unvested, respectively, at that time.

Accounting Periods

We use a 52- or 53-week fiscal year ending on the last Saturday in December. Fiscal 2013 and 2012 were 52-week years ending on December 28, 2013 and December 29, 2012, respectively. Fiscal 2011 was a 53-week year ending on December 31, 2011.

Results of Operations

The following table sets forth certain Consolidated Statements of Operations data expressed as a percentage of net revenue for the periods indicated:

	Fiscal Years Ended
	December 28, 2013		December 29, 2012		December 31, 2011
Net revenue	100	%	100	%	100	%
Cost of net revenue	60		61		66
Gross profit	40		39		34
Operating expense
Research and development	21		17		21
Selling, general and administrative	21		18		22
Total operating expense	42		35		43
Income (loss) from operations	(2	)	4		(9	)
Other income (expense), net	—		—		—
Income (loss) before income taxes	(2	)	4		(9	)
Provision (benefit) for income taxes	—		—		—
Net income (loss)	(2	)%	4	%	(9	)%

Comparison of the years ended December 28, 2013, December 29, 2012, and December 31, 2011

Net Revenue

	Fiscal Years Ended
	December 28, 2013		December 29, 2012		December 31, 2011
	(in thousands)
Product net revenue	$	201,873	$	203,680	$	104,889
Other net revenue	443		228		2,882
Total net revenue	$	202,316	$	203,908	$	107,771

A significant portion of our net revenue results from the sale of our antenna switches used in mobile devices and broadband and general purpose RF switches used in wireless infrastructure, broadband, industrial and other markets. The balance of our product sales being derived from digital attenuators, phase-locked loops (PLL), mixers / upconverters, and

42

prescalers used in broadband, industrial, wireless infrastructure, test and measurement equipment, and space and military markets. For the year ended December 28, 2013, our product net revenue decreased by $1.8 million, or 0.9% compared to the same period in fiscal 2012, as higher volumes of switch products used in handset applications were more than offset by reductions in our average selling prices as a result of our increased product diversity in handset applications. Our overall average unit selling price for switches used in mobile devices in fiscal 2013 were also impacted by declines in the average selling prices associated with products introduced in prior years. Product net revenue from switches used in mobile devices decreased by $1.0 million compared to fiscal 2012. Product net revenue also decreased as a result of lower shipments of digital attenuators used in the wireless infrastructure and test and measurement markets was partially offset by an increase of PLLs sold into our space and military market. Other net revenue for the year ended December 28, 2013 increased by $0.2 million compared to fiscal 2012, primarily due to additional development contracts in the current year.

For the year ended December 29, 2012, our product net revenue increased by $98.8 million, or 94%, compared to fiscal 2011. Product net revenue from switches used in handset antenna applications increased by $94.1 million compared to fiscal 2011, as products sold through one of our distributors in Asia (Macnica) significantly increased. This increase in volume of our antenna switches resulted from additional design wins by a module manufacturer (Murata) who incorporates our products into their modules which are then sold to OEMs. Product net revenue also increased by $4.0 million from sales of antenna and broadband switches used in broadband applications due to increased shipments through both North American and Asian distributors. The remaining increase in our product net revenue of $0.7 million was due to increases in our mixers / upconverters and prescalers. Other net revenue for the year ended December 29, 2012 decreased by $2.7 million compared to fiscal 2011, primarily due to the completion of a government research and development contract in the second quarter of fiscal 2011 and the fact that we entered into fewer and smaller development contracts.

We market and sell our products worldwide. We attribute net revenue to the geographic region where the customer, or its business unit that makes the purchase, is based. Our net revenue by geographic region for the periods indicated was as follows:

	Fiscal Years Ended
	December 28, 2013				December 29, 2012				December 31, 2011
	(in thousands)
United States	$	35,089	17	%	$	34,489	17	%	$	31,921	30	%
Japan	142,389		71		147,458		72		52,062		48
All others	24,838		12		21,961		11		23,788		22
	$	202,316	100	%	$	203,908	100	%	$	107,771	100	%

Cost of Net Revenue and Gross Profit

	Fiscal Years Ended
	December 28, 2013			December 29, 2012			December 31, 2011
	(in thousands)
Cost of net revenue	$	120,920		$	124,135		$	70,955
% of net revenue	60		%	61		%	66		%
Gross profit	$	81,396		$	79,773		$	36,816
% of net revenue	40		%	39		%	34		%

Cost of net revenue for the year ended December 28, 2013 decreased by $3.2 million, or 2.6%, compared to fiscal 2012 primarily due to reduced product costs through improvements in our production yields, and engineering efforts to reduce part costs, particularly those used in our high volume handset applications. Gross margin for the year ended December 28, 2013 increased to 40% from 39% compared to fiscal 2012. The gross margin improvement of 1% was mainly due to reduced product cost and a change in the mix of products sold, partially offset by additional inventory write-downs and costs associated with our corporate restructuring. In fiscal 2013, our product costs were negatively impacted by inventory write-downs of $7.8 million. These write-downs were mainly due to changes in customer forecasted demand from one of our distributors. In fiscal 2012, our product cost was negatively impacted by inventory write-downs of $1.9 million related to excess inventory during the fourth quarter of fiscal 2012. We expect our gross margin will fluctuate from quarter to quarter in the future based on changes in the mix of products we sell, the impact of competitive pricing pressures from customers, variations in our manufacturing costs, or market volatility leading to fluctuations in the volumes we ship.

43

Cost of net revenue for the year ended December 29, 2012 increased by $53.2 million, or 75%, compared to fiscal 2011 primarily due to higher volume shipments of our antenna switches used in handsets. Gross margin for the year ended December 29, 2012 increased to 39% from 34% compared to fiscal 2011. The gross margin improvement of 5% was mainly due to reduced product cost, volume increase and a change in the mix of products sold. In fiscal 2011, our product cost was negatively impacted by inventory write-downs of $3.4 million during the second half of fiscal 2011. These write-downs were the result of lower than anticipated yields of certain wafers in new manufacturing processes. In fiscal 2012, the increased gross margin was partially offset by inventory write-downs of $1.9 million related to forecasted excess inventory during the fourth quarter of fiscal 2012.

Research and Development

	Fiscal Years Ended
	December 28, 2013			December 29, 2012			December 31, 2011
	(in thousands)
Research and development	$	42,192		$	34,134		$	22,730
% of net revenue	21		%	17		%	21		%

Research and development expense for the year ended December 28, 2013 increased by $8.1 million compared to fiscal 2012. The increase was in part due to increased compensation expense of $5.5 million as a result of higher headcount. Other non-personnel related research and development expenditures increased by $2.6 million due to the number of new product development and existing product enhancement initiatives undertaken, as we released more than 40 new products during the year ended December 28, 2013. We expect our research and development expense to remain materially consistent as a percentage of net revenue.

Research and development expense for the year ended December 29, 2012 increased by $11.4 million compared to fiscal 2011. The increase was in part due to increased compensation expense of $5.2 million as a result of higher headcount. Other non-personnel related research and development expenditures increased by $6.2 million due to the number of new product development and existing product enhancement initiatives undertaken during the year ended December 29, 2012.

Selling, General and Administrative

	Fiscal Years Ended
	December 28, 2013			December 29, 2012			December 31, 2011
	(in thousands)
Selling, general and administrative	$	43,142		$	36,971		$	23,252
% of net revenue	21		%	18		%	22		%

Selling, general and administrative expense for the year ended December 28, 2013 increased by $6.2 million compared to fiscal 2012. The increase was in part attributable to additional compensation costs of $3.8 million mainly as a result of an increase in sales headcount compared to the prior year period and severance costs of $0.3 million associated with our corporate restructuring. Other increases included additional professional fees of $1.4 million and insurance costs of $0.5 million due to the full year effect of being a public company, as well as additional sales and marketing expense of $0.4 million and training and recruiting expense of $0.1 million. We expect our selling, general and administrative expense to remain materially consistent in absolute dollars, consisting of expected increases in professional fees offset by decreases in compensation costs.

Selling, general and administrative expense for the year ended December 29, 2012 increased by $13.7 million compared to fiscal 2011. The increase was in part attributable to additional compensation costs of $4.3 million mainly as a result of an increase in sales headcount compared to the prior year period. Other increases included additional professional fees of $6.5 million, sales commissions of $0.5 million, travel expense of $0.3 million, insurance expense of $0.3 million, and a number of other smaller increases.

44

Other Income (Expense)

	Fiscal Years Ended
	December 28, 2013			December 29, 2012			December 31, 2011
	(in thousands)
Interest expense, net	$	(130	)	$	(1,354	)	$	(311	)
Other income (expense), net	$	84		$	(130	)	$	(9	)

Interest expense, net for the year ended December 28, 2013 consisted primarily of interest associated with the Murata supply and prepayment agreement, entered into during 2012. The decrease in interest expense, net compared to fiscal 2012 was due to repaying deposits received under the Murata agreement from $13.0 million to $0.9 million as of the end of fiscal 2013, as well as the absence of interest expense on warrants which were converted into common stock as part of our initial public offering (IPO), and the absence of interest expense on our line of credit, our notes payable, and certain capital leases which were paid off following our IPO in 2012. Other income (expense), net for the year ended December 28, 2013 decreased by $0.2 million compared to fiscal 2012, primarily due to higher realized foreign exchange gains.

Interest expense, net for the year ended December 29, 2012 increased by $1.0 million compared to fiscal 2011 mainly due to the change in fair value of our warrant liability of $0.6 million and imputed interest on our customer deposit financing arrangement of $0.4 million. The details of this arrangement are discussed in “Liquidity and Capital Resources.” Other expense, net consists primarily of realized foreign exchange gains and losses. Other expense, net for the year ended December 29, 2012 increased by $0.1 million compared to fiscal 2011, primarily due to higher realized foreign exchange losses.

Liquidity and Capital Resources

Our principal source of liquidity as of December 28, 2013 consisted of our cash, cash equivalents, and both short-term and long-term marketable securities totaling $63.2 million. We have historically financed our operations primarily through the sale of preferred and common stock, equipment term notes, leases, a credit facility, and more recently by proceeds from our initial public offering, a customer deposit financing arrangement, and during fiscal 2012 from cash generated from operations. We continue to focus on monitoring our cash usage, controlling operating expense growth, and satisfying future expected liquidity requirements. As of December 28, 2013, we have an accumulated deficit of $225.0 million. We believe our cash, cash equivalents, and marketable securities together with our access to existing debt facility will be sufficient to meet our liquidity requirements for the foreseeable future. Our future growth is dependent upon increasing revenues and managing working capital to a level that is adequate to support our increased cost structure or upon obtaining adequate debt or equity financing to fulfill our obligations as they become due.

During fiscal years 2012 and 2013, our cash from operating activities was impacted primarily due to the following transactions:

• In March 2012, we entered into a supply and prepayment agreement with Murata for an initial term of 18 months. Under the terms of the agreement, Murata agreed to prepay on certain purchase orders placed through a third party distributor (Macnica) and to pay us a total deposit of $13.0 million, which were included in customer deposits as of December 29, 2012. During the year ended December 28, 2013, we have repaid $12.1 million under the supply and prepayment agreement with Murata resulting in a remaining customer deposit of $0.9 million.

• As of December 29, 2012, we had received prepayments on purchase orders from Macnica of $11.4 million, which were included in customer deposits. During the year ended December 28, 2013, our customer deposits decreased as we received the remaining prepayments on purchases from Macnica during the first half of fiscal 2013. As of December 28, 2013, we had no prepayments as the agreement concluded on March 31, 2013 and the deposit was fully utilized in April of 2013.

We use cash primarily to fund operating expenses, purchase inventory, acquire property and equipment, and in fiscal 2013, the repayment of customer deposits received and the elimination of a prepayment arrangement. Cash used to fund operating expenses is impacted by the timing of when we pay these expenses as reflected in the change in our outstanding accounts payable and accrued expenses and excludes the impact of non-cash items such as depreciation and stock-based compensation.

One of our primary sources of cash is receipts from shipments of products to customers. Aside from the growth in amounts billed to our customers, net cash collections of accounts receivable are impacted by the efficiency of our cash collection process, which can vary from period to period depending on the payment cycles of our major customers.

45

Below is a summary of our cash flows used in operating, investing, and financing activities for the years indicated:

	Fiscal Years Ended
	December 28, 2013			December 29, 2012			December 31, 2011
	(in thousands)
Net cash provided by (used in) operating activities	$	(13,597	)	$	16,850		$	(97	)
Net cash used in investing activities	(3,948		)	(66,769		)	(4,330		)
Net cash provided by (used in) financing activities	(10,276		)	81,915			1,302
Effect of exchange rates on cash and cash equivalents	(36		)	(9		)	18
Net increase (decrease) in cash and cash equivalents	$	(27,857	)	$	31,987		$	(3,107	)

Net cash provided by (used in) operating activities

Net cash used in operating activities in fiscal 2013 of $13.6 million was primarily attributable to fully utilizing the $11.4 million net deposits received from Macnica during fiscal 2012 for shipments in the future. The remaining $2.2 million consisted of our net loss of $4.1 million adjusted for non-cash expenses of $13.5 million, offset by changes of our operating assets and liabilities of $11.6 million, excluding the Macnica deposit. The net decrease in operating assets and liabilities was primarily attributable to decreases in accounts payable and accrued liabilities of $12.6 million, deferred revenue of $6.2 million, and an increase in accounts receivable of $3.6 million, partially offset by decreases in prepaid expenses and other current assets of $7.3 million and inventory of $3.5 million. Non-cash expenses of $13.5 million consisted primarily of depreciation and amortization of $6.6 million and stock-based compensation of $6.6 million. Accounts payable and accrued liabilities decreased due to lower manufacturing activity and timing of vendor payments during the period. Accounts receivable increased due to timing of cash collections. Deferred revenue decreased due to our distributor (Macnica) who carried lower inventory balances. Inventory decreased as of a result of lower levels of finished goods. Prepaid expenses and other current assets decreased by $7.3 million mainly due to deposit repayments from our suppliers of $3.8 million, as well as reductions in non-trade receivables from suppliers of $3.5 million.

Net cash used in investing activities

Net cash used in investing activities during the year ended December 28, 2013 consisted of purchases of marketable securities of $39.1 million and purchases of property and equipment of $5.9 million, offset by sales of marketable securities of $41.0 million. The majority of our capital expenditures in the year ended December 28, 2013 related to new testing machinery and equipment.

Net cash provided by (used in) financing activities

Net cash used in financing activities amounted to $10.3 million during the year ended December 28, 2013, and was primarily attributable to $12.1 million returned to Murata under the supply and prepayment agreement, partially offset by proceeds from exercising stock options provided $1.8 million during the year ended December 28, 2013.

During the year ended December 29, 2012 we repaid our line of credit, our notes payable and the majority of our capital leases. At December 28, 2013, there was no outstanding balance under the line of credit and the note payable and there was $19.2 million available, respectively. We were in compliance with our financial loan covenants at December 28, 2013.

Contractual Obligations, Commitments, and Contingencies

The following table summarizes our outstanding contractual obligations as of December 28, 2013 and the effect those obligations are expected to have on our liquidity and cash flows in future periods:

	Payments Due by Period
Contractual Obligations	Total		Less Than 1 Year		1-3 Years		3-5 Years		More Than 5 Years
	(in thousands)
Operating lease obligations	$	3,845	$	2,428	$	1,417	$	—	$	—
Inventory purchase obligations	12,345		12,345		—		—		—
Total	$	16,190	$	14,773	$	1,417	$	—	$	—

46

As of December 28, 2013, we had recorded liabilities of $5.7 million for uncertain tax positions, which is not included in the table because we are unable to reliably estimate the amount of payments in individual years that will be made in connection with these uncertain tax positions.

Contingencies

On February 14, 2012, we filed a lawsuit in the U.S. District Court for the Central District of California, which was subsequently moved to the U.S. District Court for the Southern District of California. The action alleges the infringement of five of our patents relating to RFICs and switching technology by RFMD. The lawsuit alleges that certain of RFMD’s products infringe our patents relating to SOI design technology for RFICs and seeks, in addition to damages, to permanently enjoin RFMD from further infringement. On March 26, 2013, we filed an additional lawsuit against RFMD in the U.S. District Court for the Southern District of California alleging infringement of a sixth patent relating to RFICs and switching technology by RFMD. On April 25, 2013, we consolidated these two U.S. District Court actions into one lawsuit. On September 27, 2013, the U.S. District Court set a trial date for November 12, 2014. On December 12, 2013, RFMD filed a counterclaim alleging that we violate a patent owned or licensed by RFMD. Pursuing these actions is costly and could impose a significant burden on management and employees. We may receive unfavorable interim rulings in the course of this litigation and there can be no assurance that a favorable outcome will ultimately be obtained. Pursuing these actions is costly and could impose a significant burden on management and employees. We may receive unfavorable interim rulings in the course of this litigation and there can be no assurance that a favorable outcome will ultimately be obtained. We believe the outcome of this pending litigation will not have, individually or in the aggregate, a material adverse effect on our consolidated financial statements.

On November 14, 2013, representatives of the U.S. Department of Homeland Security (DHS), in collaboration with the United States Attorney’s Office for the Southern District of California (USAO), executed a federal search warrant at our San Diego facilities in connection with an investigation into exports and temporary imports of certain products sold in the aerospace market. We are cooperating fully with the USAO and DHS officials. No claims have been asserted and no amounts have been accrued for this contingency in the consolidated financial statements.

The U.S. Department of State, Office of Defense Trade Controls Compliance (USDS), is conducting a review of our compliance with the Arms Export Control Act (AECA) and the AECA’s implementation of International Traffic In Arms Regulations (ITAR). Based on this review we could be subject to continued investigation and potential regulatory consequences related to these violations ranging from a no-action letter, government oversight of facilities and export transactions, monetary penalties of up to $0.5 million per violation, and in certain cases, debarment from government contracting, denial of export privileges, and criminal penalties. No claims have been asserted and no amounts have been accrued for this contingency in the consolidated financial statements. Furthermore, due to the preliminary nature of the investigation and the USDS review, it is not currently possible to estimate the likelihood of an unfavorable outcome or the possible loss or range of losses in the event of an unfavorable outcome.

Off-Balance Sheet Arrangements

During the periods presented, we did not have any relationships with unconsolidated entities or financial partnerships, such as entities often referred to as structured finance, variable interest, or special purpose, which would have been established for the purpose of facilitating off-balance-sheet arrangements or other contractually narrow or limited purposes. In addition, we do not engage in trading activities involving non-exchange traded contracts. As such, we are not materially exposed to any financing, liquidity, market, or credit risk that could arise if we had engaged in such relationships. We do not have relationships or transactions with persons or entities that derive benefits from their non-independent relationship with us or our related parties.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk

We are exposed to market risk in the ordinary course of business, which consists primarily of interest rate risk associated with our cash and cash equivalents, our debt, and foreign exchange rate risk.

Interest rate risk. The primary objective of our investment activity is to preserve principal, provide liquidity, and capture a market rate of return based on our investment policy parameters and market conditions. We do not enter into investments for trading or speculative purposes. Our investments have limited exposure to market risk. To minimize exposure to interest rate risk, we maintain a portfolio of short-term U.S. Treasuries money market funds, U.S. agency securities, certificates of deposit, commercial paper, and corporate notes and bonds. Our investments are stated at fair value. In the event that there are differences between fair value and cost in any of our available-for-sale securities, unrealized gains and losses on these investments are reported as a separate component of accumulated other comprehensive income (loss). The interest rates are variable and fluctuate with current market conditions. Changes in U.S. interest rates affect the interest earned on our cash, cash equivalents, and marketable securities and the fair value of those securities.

47

The Company’s exposure to changes in interest rates relates primarily to our investment portfolio. We typically invest in highly rated securities and its policy generally limits the amount of credit exposure to any one issuer. Our investment policy requires instruments to meet certain minimum credit ratings.

Foreign currency risk. Our sales to international customers, as well as our purchases of material from international suppliers, are denominated primarily in U.S. dollars. Accordingly, we have limited exposure to foreign currency exchange rates and do not enter into foreign currency hedging transactions. The functional currency of our foreign operations in Europe and Asia is the local currency, and as such, any fluctuation in the exchange rates of these net assets, denominated in local currency, would be reflected in the translation gains or losses, which are accounted for in other comprehensive income in our statements of changes in equity. Our inventory purchases are also denominated in U.S. dollars. We do not believe that a change of 10% in the foreign currency exchange rates would have a material impact on our financial position or results of operations.

Item 8. Financial Statement and Supplementary Data

The financial statements and supplementary data required by this item are included in Part IV, Item 15 of this Report.

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

None.

Item 9A. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of our disclosure controls and procedures as of December 28, 2013. The term “disclosure controls and procedures,” as defined in Rules 13a- 15(e) and 15d- 15(e) under the Securities Exchange Act of 1934, as amended (Exchange Act), means controls and other procedures of a company that are designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the company’s management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure. Based on the evaluation of our disclosure controls and procedures as of December 28, 2013, our Chief Executive Officer and Chief Financial Officer concluded that as of such date, our disclosure controls and procedures were effective at the reasonable assurance level.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting that occurred during the three months ended December 28, 2013 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Management’s Report on Internal Control over Financial Reporting

This annual report does not include a report of management’s assessment regarding internal control over financial reporting or an attestation report of the company’s registered public accounting firm due to a transition period established by rules of the Securities and Exchange Commission for newly public companies and emerging growth companies.

Limitations on the Effectiveness of Controls

Control systems, no matter how well conceived and operated, are designed to provide a reasonable, but not an absolute, level of assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, have been detected, and misstatements due to error or fraud may occur and not be detected.

Item 9B. Other Information

None.

48

PART III

Item 10. Directors, Executive Officers and Corporate Governance

The information required by this Item will be contained in our Proxy Statement and is incorporated herein by reference.

Item 11. Executive Compensation

The information required by this Item will be contained in our Proxy Statement and is incorporated herein by reference.

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

The information required by this Item will be contained in our Proxy Statement and is incorporated herein by reference.

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

The information required by this Item will be contained in our Proxy Statement and is incorporated herein by reference.

Item 14. Principal Accounting Fees and Services

The information required by this Item will be contained in our Proxy Statement and is incorporated herein by reference.

49

PART IV

Item 15. Exhibits, Financial Statement Schedules

(a) 1. Financial Statements.

The following Peregrine consolidated financial statements, and related notes thereto, and the related Report of our Independent Registered Public Accounting Firm are filed as part of this Form 10-K:

	Page
Report of Independent Registered Public Accounting Firm	F-1
Consolidated Balance Sheets as of December 28, 2013 and December 29, 2012	F-2
Consolidated Statements of Operations for the years ended December 28, 2013, December 29, 2012, and December  31, 2011	F-3
Consolidated Statements of Comprehensive Income (Loss) for the years ended December 28, 2013, December 29, 2012, and  December 31, 2011	F-4
Consolidated Statements of Stockholders’ Equity (Deficit) for the years ended December 28, 2013, December 29, 2012, and December 31, 2011	F-5
Consolidated Statements of Cash Flows for the years ended December 28, 2013, December 29, 2012, and December  31, 2011	F-6
Notes to Consolidated Financial Statements	F-7

2. Financial Statement Schedules.

The financial statement schedules have been omitted because they are not applicable or not required, or the information is included in the Consolidated Financial Statements or Notes thereto.

3. Exhibits.

The exhibits listed on the accompanying index to exhibits immediately following the financial statements are filed as part of, or hereby incorporated by reference into, this report.

(b) Financial Statement Schedules

All schedules have been omitted because the information required to be presented in them is not applicable or is shown in the consolidated financial statements or related notes.

50

Report of Independent Registered Public Accounting Firm

The Board of Directors and Stockholders

Peregrine Semiconductor Corporation

We have audited the accompanying consolidated balance sheets of Peregrine Semiconductor Corporation as of December 28, 2013 and December 29, 2012, and the related consolidated statements of operations, comprehensive income (loss), stockholders’ equity (deficit) and cash flows for each of the three years in the period ended December 28, 2013. These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these financial statements 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. We were not engaged to perform an audit of the Company’s internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and 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 Peregrine Semiconductor Corporation at December 28, 2013 and December 29, 2012, and the consolidated results of its operations and its cash flows for each of the three years in the period ended December 28, 2013, in conformity with U.S. generally accepted accounting principles.

/s/ Ernst & Young LLP

San Diego, California

February 19, 2014

F-1

Peregrine Semiconductor Corporation

CONSOLIDATED BALANCE SHEETS

(in thousands, except per share data)

	December 28, 2013			December 29, 2012
Assets
Current assets:
Cash and cash equivalents	$	16,249		$	44,106
Short-term marketable securities	28,035			30,361
Accounts receivable, net	16,905			13,353
Inventories	53,489			57,017
Prepaids and other current assets	4,085			11,108
Total current assets	118,763			155,945
Property and equipment, net	23,122			22,871
Long-term marketable securities	18,888			18,892
Other assets	102			210
Total assets	$	160,875		$	197,918
Liabilities and stockholders’ equity
Current liabilities:
Accounts payable	$	12,983		$	22,306
Accrued liabilities	11,829			12,672
Accrued compensation	4,542			5,726
Customer deposits	916			24,425
Deferred revenue	6,131			12,755
Current portion of obligations under capital leases	—			11
Total current liabilities	36,401			77,895
Obligations under capital leases, less current portion	—			18
Other long-term liabilities	943			886
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $.001 par value, 5,000 shares authorized at December 28, 2013 and December 29, 2012; no shares issued and outstanding at December 28, 2013 and December 29, 2012	—			—
Common stock, $.001 par value, 100,000 shares authorized at December 28, 2013 and December 29, 2012; 32,712 and 31,855 shares issued and outstanding at December 28, 2013 and December 29, 2012, respectively	33			32
Additional paid-in capital	348,684			340,221
Accumulated deficit	(224,986		)	(220,935		)
Accumulated other comprehensive loss	(200		)	(199		)
Total stockholders’ equity	123,531			119,119
Total liabilities and stockholders’ equity	$	160,875		$	197,918

See accompanying notes.

F-2

Peregrine Semiconductor Corporation

CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per share data)

	Years Ended
	December 28, 2013			December 29, 2012			December 31, 2011
Net revenue	$	202,316		$	203,908		$	107,771
Cost of net revenue	120,920			124,135			70,955
Gross profit	81,396			79,773			36,816
Operating expense:
Research and development	42,192			34,134			22,730
Selling, general and administrative	43,142			36,971			23,252
Total operating expense	85,334			71,105			45,982
Income (loss) from operations	(3,938		)	8,668			(9,166		)
Interest expense, net	(130		)	(1,354		)	(311		)
Other income (expense), net	84			(130		)	(9		)
Income (loss) before income taxes	(3,984		)	7,184			(9,486		)
Provision (benefit) for income taxes	67			(88		)	196
Net income (loss)	(4,051		)	7,272			(9,682		)
Net income allocable to preferred stockholders	—			(4,515		)	—
Net income (loss) attributable to common stockholders	$	(4,051	)	$	2,757		$	(9,682	)
Net income (loss) per share attributable to common stockholders:
Basic	$	(0.13	)	$	0.19		$	(3.57	)
Diluted	$	(0.13	)	$	0.15		$	(3.57	)
Shares used to compute net income (loss) per share attributable to common stockholders:
Basic	32,294			14,291			2,715
Diluted	32,294			18,651			2,715

See accompanying notes.

F-3

Peregrine Semiconductor Corporation

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(in thousands)

	Years Ended
	December 28, 2013			December 29, 2012		December 31, 2011
Net income (loss)	$	(4,051	)	$	7,272	$	(9,682	)
Foreign currency translation adjustments	(1		)	20		(20		)
Unrealized gain on marketable securities	—			5		—
Comprehensive income (loss)	$	(4,052	)	$	7,297	$	(9,702	)

See accompanying notes.

F-4

Peregrine Semiconductor Corporation

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (DEFICIT)

(in thousands)

	Convertible Preferred Stock																				Common Stock			Additional Paid-in Capital		Accumulated Deficit			Accumulated Other Comprehensive Loss			Total Stockholders’ Equity (Deficit)
	Series A1					Series B1					Series C1					Series D1
	Shares		Amount			Shares		Amount			Shares		Amount			Shares		Amount			Shares	Amount
Balance at December 25, 2010	5,763		$	31,837		1,629		$	11,298		6,108		$	35,469		8,865		$	93,826		2,674	$	3	$	82,554	$	(218,525	)	$	(204	)	$	(136,172	)
Exercise of stock options, net of repurchase liability and including vesting of early exercises	—		—			—		—			—		—			—		—			102	—		190		—			—			190
Stock-based compensation expense	—		—			—		—			—		—			—		—			—	—		3,084		—			—			3,084
Net loss	—		—			—		—			—		—			—		—			—	—		—		(9,682		)	—			(9,682		)
Other comprehensive loss	—		—			—		—			—		—			—		—			—	—		—		—			(20		)	(20		)
Balance at December 31, 2011	5,763		31,837			1,629		11,298			6,108		35,469			8,865		93,826			2,776	3		85,828		(228,207		)	(224		)	(142,600		)
Net settlement of Series D1 preferred stock warrants	—		—			—		—			—		—			47		1,285			—	—		—		—			—			—
Conversion of preferred stock upon initial public offering	(5,763	)	(31,837		)	(1,629	)	(11,298		)	(6,108	)	(35,469		)	(8,912	)	(95,111		)	22,412	22		173,715		—			—			173,737
Issuance of common stock upon initial public offering, net of offering costs and underwriter commission	—		—			—		—			—		—			—		—			6,166	6		75,784		—			—			75,790
Exercise of stock options, net of repurchase liability and including vesting of early exercise	—		—			—		—			—		—			—		—			430	1		457		—			—			458
Net settlement of common stock warrants	—		—			—		—			—		—			—		—			71	—		—		—			—			—
Stock-based compensation expense	—		—			—		—			—		—			—		—			—	—		4,437		—			—			4,437
Net income	—		—			—		—			—		—			—		—			—	—		—		7,272			—			7,272
Other comprehensive income	—		—			—		—			—		—			—		—			—	—		—		—			25			25
Balance at December 29, 2012	—		—			—		—			—		—			—		—			31,855	32		340,221		(220,935		)	(199		)	119,119
Exercise of stock options	—		—			—		—			—		—			—		—			857	1		1,848		—			—			1,849
Stock-based compensation expense	—		—			—		—			—		—			—		—			—	—		6,615		—			—			6,615
Net loss	—		—			—		—			—		—			—		—			—	—		—		(4,051		)	—			(4,051		)
Other comprehensive loss	—		—			—		—			—		—			—		—			—	—		—		—			(1		)	(1		)
Balance at December 28, 2013	—		$	—		—		$	—		—		$	—		—		$	—		32,712	$	33	$	348,684	$	(224,986	)	$	(200	)	$	123,531

See accompanying notes.

F-5

Peregrine Semiconductor Corporation

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

	Years Ended
	December 28, 2013			December 29, 2012			December 31, 2011
Operating activities
Net income (loss)	$	(4,051	)	$	7,272		$	(9,682	)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	6,589			4,579			3,980
Loss on disposal of property and equipment	46			31			8
Stock-based compensation	6,615			4,437			3,084
Revaluation of warrants to fair value	—			633			(36		)
Imputed interest related to deposit arrangements, net	(313		)	420			—
Amortization of premium and discount on investments, net	368			169			—
Cash received for lease incentive	135			115			348
Changes in operating assets and liabilities:
Accounts receivable	(3,634		)	(255		)	(1,303		)
Inventories	3,545			(27,188		)	(7,522		)
Prepaids and other current and noncurrent assets	7,330			(7,751		)	(2,271		)
Accounts payable and accrued liabilities	(12,585		)	16,098			13,032
Customer deposits	(11,425		)	11,425			—
Deferred revenue	(6,217		)	6,865			265
Net cash provided by (used in) operating activities	(13,597		)	16,850			(97		)
Investing activities
Purchases of property and equipment	(5,884		)	(17,212		)	(4,354		)
Proceeds from sale of equipment	6			6			24
Purchases of marketable securities	(39,097		)	(54,663		)	—
Sale and maturity of marketable securities	41,027			5,100			—
Net cash used in investing activities	(3,948		)	(66,769		)	(4,330		)
Financing activities
Payments on obligations under capital leases	(37		)	(661		)	(681		)
Payments on notes payable	—			(1,618		)	(820		)
Proceeds from line of credit	—			3,000			4,500
Payments on line of credit	—			(10,749		)	—
Proceeds from exercise of stock options	1,845			445			148
Proceeds from exercise of warrants	—			31			—
Payments on customer deposit financing arrangement	(12,084		)	—			—
Proceeds from customer deposit financing arrangement	—			13,000			—
Proceeds from initial public offering, net of underwriter commissions	—			80,278			—
Costs paid in connection with initial public offering	—			(1,811		)	(1,845		)
Net cash provided by (used in) financing activities	(10,276		)	81,915			1,302
Effect of exchange rate changes on cash and cash equivalents	(36		)	(9		)	18
Net change in cash and cash equivalents	(27,857		)	31,987			(3,107		)
Cash and cash equivalents at beginning of year	44,106			12,119			15,226
Cash and cash equivalents at end of year	$	16,249		$	44,106		$	12,119
Supplemental disclosure of cash flow information
Interest paid	$	3		$	388		$	345
Income taxes paid	$	149		$	119		$	82
Supplemental disclosure of non cash financing activities
Reclassification of restricted stock to equity upon vesting of early exercised options	$	4		$	13		$	42
Loan and capital lease obligation for capital equipment and software	$	—		$	—		$	207
Conversion of convertible preferred stock to common stock	$	—		$	173,715		$	—

See accompanying notes.

F-6

Peregrine Semiconductor Corporation

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except per share amounts)

1. Organization and Summary of Significant Accounting Policies

The Company

Peregrine Semiconductor Corporation (the Company) is a fabless provider of high performance radio frequency integrated circuits (RFICs). The Company’s solutions leverage its proprietary UltraCMOS technology which enables the design, manufacture, and integration of multiple RF, mixed signal, and digital functions on a single chip. The Company’s

solutions target a broad range of applications in the space and military, automotive, broadband, industrial, mobile device, test and measurement equipment, and wireless infrastructure markets.

Principles of Consolidation

The consolidated financial statements include the accounts of the Company and its subsidiaries. All significant intercompany transactions have been eliminated upon consolidation.

Accounting Periods

The Company uses a 52- or 53-week fiscal year ending on the last Saturday in December. Fiscal years 2013 and 2012 were 52-week years ending on December 28, 2013 and December 29, 2012, respectively. Fiscal year 2011 was a 53-week year ending on December 31, 2011.

Use of Estimates

The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amount of assets and liabilities at the date of the financial statements as well as the reported amounts of net revenue and expense during the reporting period. The Company regularly evaluates estimates and assumptions related to areas such as revenue recognition, allowances for doubtful accounts, warranty obligations, inventory valuation, stock-based compensation expense, deferred income tax valuation allowances, litigation and other loss contingencies. These estimates and assumptions are based on current facts, historical experience and various other factors believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities and the recording of revenue, costs and expenses that are not readily apparent from other sources. Actual results may differ materially and adversely from these estimates. To the extent there are material differences between the estimates and actual results, the Company’s future results of operations will be affected.

Concentration of Credit Risk

Financial assets and liabilities, which potentially subject the Company to concentrations of credit risk, consist primarily of cash equivalents, marketable securities, and accounts receivable. The Company limits its exposure to credit loss by placing its cash in high credit quality financial investments. At times, such deposits may be in excess of insured limits. The Company has not experienced any significant losses on its investments.

Deferred Initial Public Offering Costs

Deferred IPO costs, consisting of direct legal, accounting, and other fees and costs, were capitalized and included in other assets on the Company’s consolidated balance sheet for the periods presented prior to August 2012. Upon closing of the Company’s IPO, the aggregate deferred offering costs of $4,494 were reclassified to stockholders’ equity.

Fair Value of Financial Instruments

The Company applies fair value accounting for all financial assets and liabilities that are recognized or disclosed at fair value in the financial statements on a recurring basis. The Company’s financial instruments consist principally of cash and cash equivalents and marketable securities. The fair value of a financial instrument is the amount that would be received in an asset sale or paid to transfer a liability in an orderly transaction between unaffiliated market participants. Assets and liabilities measured at fair value are categorized based on whether or not the inputs are observable in the market and the degree that the inputs are observable. The categorization of financial instruments within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The hierarchy is prioritized into three levels (with Level 3 being the lowest) defined as follows:

F-7

Peregrine Semiconductor Corporation

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except per share amounts)

Level 1: Inputs are based on quoted market prices for identical assets or liabilities in active markets at the measurement date.

Level 2: Inputs include quoted prices for similar assets or liabilities in active markets and/or quoted prices for identical or similar assets or liabilities in markets that are not active near the measurement date.

Level 3: Inputs include management’s best estimate of what market participants would use in pricing the asset or liability at the measurement date. The inputs are unobservable in the market and significant to the instrument’s valuation.

The fair value of the Company’s cash equivalents was determined based on “Level 1” inputs. The fair value of marketable securities was determined based on “Level 2” inputs. The fair value of the Company’s “Level 2” instruments were valued based on the market approach technique which uses quoted market prices or model driven valuations using significant inputs derived from or corroborated by observable market data. The Company does not have any marketable securities in the “Level 3” category. The Company believes that the recorded values of all of the other financial assets and liabilities approximate their current fair values because of maturity and respective duration of these assets and liabilities.

Cash, Cash Equivalents and Marketable Securities

The Company considers all highly liquid investments that are readily convertible into cash and have a maturity of three months or less at the time of purchase to be cash equivalents. The cost of these investments approximates their fair value. The Company maintains an investment portfolio of various security holdings, types and maturities. The Company defines marketable securities as income yielding securities that can be readily converted into cash. Marketable securities’ short-term and long-term classifications are based on remaining maturities at each reporting period. The Company’s marketable securities include U.S. agency securities, certificates of deposit, commercial paper, and corporate notes and bonds. The Company places its cash investments in instruments that meet various parameters, including credit quality standards as specified in the Company’s investment policy.

The Company accounts for marketable securities as available-for-sale. Management determines the appropriate classification of such securities at the time of purchase and re-evaluates such classification as of each balance sheet date. Cash equivalents and marketable securities are reported at fair value with the related unrealized gains and losses included in accumulated other comprehensive income (loss), a component of shareholders’ equity, net of tax. The Company assesses whether its investments with unrealized loss positions are other than temporarily impaired. Unrealized gains and losses and declines in value judged to be other than temporary, if any, are determined based on the specific identification method and are reported in other income, net in the consolidated statements of operations.

Inventories

Inventories are stated at the lower of cost (first-in, first-out) or market. Inventory reserves or lower of cost or market allowances are established on a part specific basis for estimated obsolescence or unmarketable inventory equal to the difference between the cost of inventory and the estimated realizable value based upon assumptions about future demand and market conditions and reduce the carrying value of the related inventory. Such reductions establish a new cost basis for the specific parts. Shipping and handling costs are classified as a component of cost of net revenue in the consolidated statements of operations.

The Company continually assesses the recoverability of its inventory based on assumptions about demand and market conditions. Forecasted demand is determined based on historical sales and expected future sales. Determination of the market value may be complex, and therefore requires management to make assumptions and to apply judgment. In order for management to make the appropriate determination of market value, the following items are commonly considered: inventory turnover statistics, inventory quantities, unfilled customer order quantities, forecasted customer demand, competitive pricing, seasonality factors, consumer trends, and performance of similar products or accessories. Subsequent changes in facts or circumstances do not result in the reversal of previously recorded reserves. If actual market conditions are less favorable than those projected by management, additional inventory write-downs may be required that may adversely affect the Company’s operating results. If actual market conditions are more favorable, the Company may have higher gross profits when products are sold.

F-8

Peregrine Semiconductor Corporation

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except per share amounts)

Property and Equipment

Property and equipment is carried at cost and is depreciated using the straight-line method over the useful lives of the assets ranging from three to seven years. Leasehold improvements are amortized over the estimated life of the asset or term of the lease, whichever is shorter.

Impairment of Long-Lived Assets

The Company regularly reviews the carrying amount of its long-lived assets, as well as their useful lives, to determine whether indicators of impairment may exist which warrant adjustments to carrying values or estimated useful lives. An impairment loss would be recognized when the sum of the expected future undiscounted net cash flows is less than the carrying amount of the asset. Should impairment exist, the impairment loss would be measured based on the excess of the carrying amount of the asset over the asset’s fair value. The Company has not recognized any impairment losses through December 28, 2013.

Research and Development

Research and development costs are expensed as incurred.

Advertising Expense

The cost of advertising is expensed as incurred. The Company recognized advertising expense of $440, $288, and $185 for the years ended December 28, 2013, December 29, 2012, and December 31, 2011, respectively.

Revenue Recognition

The Company recognizes revenue when each of the following have occurred: (1) there is persuasive evidence that an arrangement with the customer exists, which is generally a customer purchase order; (2) the products are delivered, which generally occurs when the products are shipped and title and risk of loss has been transferred to the customer; (3) the selling price is fixed or determinable; and (4) collection of the customer receivable is deemed reasonably assured.

The Company records revenue based on facts available at the time of sale. Amounts that are not probable of collection once the product has shipped and title has transferred to the customer are deferred until the amount that is probable of collection can be determined. Items that are considered when determining the amounts that will be ultimately collected are the customer’s overall creditworthiness and payment history.

For distributors with rights of return, revenue is not recognized until product is shipped to the end customer of the distributor and the amount that will ultimately be collected is determinable. The Company offers its distributors limited stock rotation, price protection, and in some situations, credits on pricing depending on their end customer (ship and debit credits). For these distributors revenue is not recognized until product is shipped to the end customer of the distributor and the amount that will ultimately be collected is determinable. On shipments where net revenue is not recognized, the Company records an accounts receivable and deferred revenue for the selling price as there is a legally enforceable right to payment. Inventory at distributors remains on the Company’s books at carrying value until sold by the distributor at which time the Company recognizes the net revenue and cost of net revenue. Revenues to these distributors are recorded net of any pricing adjustments for price protection or ship and debit credits in the same period as the sale of goods to their customers. The amount of any pricing adjustment is based on the difference between the price at which the distributor originally purchased the Company’s inventory and either: (1) a lower distribution price then being offered on those products for price protection; or (2) a special price offered to the distributor in order to meet competitive pressures in the marketplace for ship and debit credits. The Company does not currently offer rebates or other pricing incentives, except for volume purchase pricing at the time of sale, to direct customers or distributors.

The Company also maintains an allowance for doubtful accounts for estimated losses resulting from the inability of customers to make required payments. If the financial condition of any customer were to deteriorate, resulting in an impairment of its ability to make payments, additional allowances could be required.

Warranty Accrual

The Company generally provides a product warranty for a period of one year; however, it may be longer for certain customers. Accordingly, the Company establishes provisions for estimated product warranty costs at the time net revenue is

F-9

Peregrine Semiconductor Corporation

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except per share amounts)

recognized based upon historical activity and, additionally, for any known product warranty issues. Warranty provisions are recorded as a cost of net revenue. The determination of such provisions requires the Company to make estimates of product return rates and expected costs to replace or rework the products under warranty. When the actual product failure rates, cost of replacements and rework costs differ from the original estimates, revisions to the estimated warranty accrual are made. Actual claims are charged against the warranty reserve.

Stock-Based Compensation

The Company has stock incentive plans under which options to purchase common stock have been granted to employees, consultants and directors. The stock options have been granted to employees with exercise prices equal to or above the fair value of the underlying stock, as determined by the board of directors on the date the equity award was granted up until the Company’s initial public offering in August 2012. The board of directors determined the value of the underlying stock by considering a number of factors, including historical and projected financial results, the risks the Company faced at the time, the preferences of the Company’s preferred stock, and the lack of liquidity of the Company’s common stock. The fair value of equity instruments expected to vest are recognized and amortized on a straight-line basis over the requisite service period of the award, which is generally four years.

Foreign Currency Translation

Functional currency of our international subsidiaries is the local currency. Resulting translation gains or losses are recognized as a component of other comprehensive income (loss). Transaction gains or losses related to balances denominated in a different currency than the functional currency are recognized in the statement of operations.

Other Income (Expense), net

Other income (expense), net consists primarily of foreign currency exchange gains and losses.

Comprehensive Income (Loss)

Comprehensive income (loss) is defined as the change in equity during a period from transactions and other events and circumstances from non-owner sources. Net income (loss) and other comprehensive income (loss), consist of foreign currency translation adjustments and unrealized gains and losses on investments, are reported, net of their related tax effect, to arrive at comprehensive income (loss).

Income Taxes

The Company accounts for income taxes using the asset and liability approach, the objective of which is to establish deferred tax assets and liabilities for the temporary differences between the financial reporting basis and the tax basis of our assets and liabilities, as measured by applying currently enacted tax laws. A valuation allowance is established for deferred tax assets if, based on the weight of available evidence, it is more likely than not that some portion or all of the deferred tax assets will not be realized. Future realization of the deferred tax asset is dependent on the reversal of existing taxable temporary differences, carryback potential, tax-planning strategies and on us generating sufficient taxable income in future years as the deferred income tax charges become currently deductible for tax reporting purposes. For the years ended December 28, 2013, December 29, 2012, and December 31, 2011, the Company has recorded a full valuation allowance against its domestic net deferred tax assets due to uncertainty of future realization.

2. Net Income (Loss) per Share

Basic net income per share is calculated by dividing net income attributable to common shareholders by the weighted-average number of common shares outstanding for the period. Diluted net income per share is calculated on the basis of the weighted-average number of shares of common stock including the effect of potential dilution that could occur if securities to issue common stock were exercised or converted into common stock. The Company calculates diluted net income (loss) per share under the as-if-converted method unless the conversion of the preferred stock is anti-dilutive to basic net income (loss) per share. To the extent preferred stock is anti-dilutive, the Company calculates diluted net income (loss) per share under the two-class method.

F-10

Peregrine Semiconductor Corporation

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except per share amounts)

	Years Ended
	December 28, 2013			December 29, 2012			December 31, 2011
Numerator:
Net income (loss)	$	(4,051	)	$	7,272		$	(9,682	)
Net income allocable to preferred stockholders	—			(4,515		)	—
Net income (loss) attributable to common stockholders	$	(4,051	)	$	2,757		$	(9,682	)
Denominator:
Weighted average common shares outstanding	32,296			14,303			2,737
Less: weighted average unvested shares of common stock subject to repurchase	(2		)	(12		)	(22		)
Weighted average common shares used in computing basic net income (loss) per share	32,294			14,291			2,715
Weighted average effect of potentially dilutive securities:
Stock options	—			4,359			—
Common stock warrants	—			1			—
Weighted average common shares used in computing diluted net income (loss) per share	32,294			18,651			2,715
Net income (loss) per share attributable to common stockholders:
Basic	$	(0.13	)	$	0.19		$	(3.57	)
Diluted	$	(0.13	)	$	0.15		$	(3.57	)
Historical outstanding anti-dilutive securities not included in diluted net income (loss) per share calculation:
Common stock options	8,227			1,030			7,240
Common stock warrants	1			—			72
Preferred stock (as converted)	—			—			22,365
Preferred stock warrants	—			—			205
	8,228			1,030			29,882

3. Certain Financial Statement Information

Inventories consisted of the following:

	December 28, 2013		December 29, 2012
Raw materials	$	22,265	$	20,986
Work in progress	22,100		15,494
Finished goods	9,124		20,537
	$	53,489	$	57,017

During the years ended December 28, 2013 and December 29, 2012, the Company recorded inventory write-downs of $5,725 and $1,920, respectively, related to excess and obsolete inventory as a result of changes in customer forecasted demand from one of the Company's distributors. During the year ended December 28, 2013 and December 31, 2011, the Company also recorded reductions to carrying value of inventories of $2,041 and $3,355, respectively, as a result of a lower of cost or market valuation. The write-downs in fiscal 2013 were due to anticipated selling price reductions the Company believes necessary to stimulate customer demand for certain products. These write-downs for fiscal 2011 were the result of lower than anticipated yields of certain wafers in new manufacturing processes. These inventory reductions were recorded in cost of net revenue.

Included in the table are inventories held by others, which include distributors and third-parties in the Company’s supply chain, of $7,874 and $13,616 at December 28, 2013 and December 29, 2012, respectively.

F-11

Peregrine Semiconductor Corporation

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except per share amounts)

Property and equipment consisted of the following:

	Useful Life (Years)	December 28, 2013			December 29, 2012
Computer equipment and software	3 – 5	$	6,390		$	5,171
Machinery and equipment	5	40,427			33,753
Office furniture and equipment	7	1,081			775
Leasehold improvements	*	5,180			4,477
Construction in progress		1,544			3,831
		54,622			48,007
Less accumulated depreciation and amortization		(31,500		)	(25,136		)
		$	23,122		$	22,871

*    Leasehold improvements are amortized over the estimated life of the asset or remaining term of the lease, whichever is shorter.

Depreciation and amortization expense was $6,589, $4,579, and $3,980 for the years ended December 28, 2013, December 29, 2012, and December 31, 2011, respectively.

Accrued liabilities consisted of the following:

	December 28, 2013		December 29, 2012
Accrued inventory purchases	$	1,717	$	1,125
Accrued inventory repurchase obligation	6,510		6,900
Accrued other	3,602		4,647
	$	11,829	$	12,672

Accrued inventory repurchase obligation represents raw materials sold to suppliers for processing. These raw

materials remain part of the Company’s total inventory and the transactions include only customary terms and conditions, such

as shipping and payment terms.

4. Financial Instruments

The following tables show the Company’s cash and marketable securities’ cost, unrealized gains, unrealized losses and fair value by significant investment category measured at fair value on a recurring basis and recorded as cash and cash equivalents or short- and long-term marketable securities as of December 28, 2013:

F-12

Peregrine Semiconductor Corporation

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except per share amounts)

	December 28, 2013
										Reported as
	Cost		Unrealized Gains		Unrealized Losses			Fair Value		Cash and Cash Equivalents		Short- Term Marketable Securities		Long-Term Marketable Securities
Cash	$	7,023	$	—	$	—		$	7,023	$	7,023	$	—	$	—
Level 1:
Money market funds	9,226		—		—			9,226		9,226		—		—
Subtotal	9,226		—		—			9,226		9,226		—		—
Level 2:
U.S. Agency securities	22,929		4		(3		)	22,930		—		15,929		7,001
Certificates of deposit	8,840		4		(10		)	8,834		—		5,959		2,875
Commercial paper	998		—		(1		)	997		—		997		—
Corporate notes and bonds	14,156		9		(3		)	14,162		—		5,150		9,012
Subtotal	46,923		17		(17		)	46,923		—		28,035		18,888
Total	$	63,172	$	17	$	(17	)	$	63,172	$	16,249	$	28,035	$	18,888

There were no transfers between Level 1, Level 2 or Level 3 securities in the year ended December 28, 2013. All of the long-term marketable securities had remaining maturities of between one and two years in duration at December 28, 2013.

As of December 28, 2013, the Company had 39 investments in marketable securities with a fair value of $23,361 that were in an unrealized loss position of $17 for less than 12 months and considers the declines in market value to be temporary in nature and does not consider any of its investments other-than temporarily impaired. When evaluating an investment for other-than-temporary impairment, the Company reviews factors such as the length of time and extent to which fair value has been below its cost basis, the financial condition of the issuer and any changes thereto, and the Company’s intent to sell, or whether it is more likely than not it will be required to sell the investment before recovery of the investment’s cost basis.

The following table presents a summary of the Company’s financial instruments that are measured on a recurring basis as of December 29, 2012:

	December 29, 2012
										Reported as
	Cost		Unrealized Gains		Unrealized Losses			Fair Value		Cash and Cash Equivalents		Short- Term Marketable Securities		Long-Term Marketable Securities
Cash	$	24,703	$	—	$	—		$	24,703	$	24,703	$	—	$	—
Level 1:
Money market funds	18,923		—		—			18,923		18,923		—		—
Subtotal	18,923		—		—			18,923		18,923		—		—
Level 2:
U.S. Agency securities	24,339		2		(2		)	24,339		—		13,317		11,022
Certificates of deposit	9,285		2		(3		)	9,284		480		6,642		2,162
Commercial paper	2,893		1		—			2,894		—		2,894		—
Corporate notes and bonds	13,211		9		(4		)	13,216		—		7,508		5,708
Subtotal	49,728		14		(9		)	49,733		480		30,361		18,892
Total	$	93,354	$	14	$	(9	)	$	93,359	$	44,106	$	30,361	$	18,892

There were no transfers between Level 1, Level 2 or Level 3 securities in the year ended December 29, 2012.

F-13

Peregrine Semiconductor Corporation

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except per share amounts)

5. Stockholders’ Equity

Preferred Stock

Immediately prior to the closing of the IPO in August 2012, all shares of the Company’s then-outstanding convertible preferred stock outstanding automatically converted into 22,412 shares of common stock. The Company initially recorded each series of convertible preferred stock at their fair values on the dates of issuance, net of issuance costs. A redemption event would only occur upon the liquidation or winding up of the Company, a greater than 50% change of control or sale of substantially all of the assets of the Company. As the redemption event was outside the control of the Company, all shares of convertible preferred stock were presented outside of permanent equity in accordance with accounting guidance for redeemable securities.

Warrants

In May 2012, holders of Series D1 convertible preferred stock warrants net settled 80 of their warrants for 19 shares of Series D1 convertible preferred stock. On the date of the settlement, the Company de-recognized the fair value of the preferred stock warrant liability of $477 against convertible preferred stock.

The Company’s certificate of incorporation includes provisions which, based on approval of the board of directors and a majority of the stockholders of the Company, allow for a sale of the assets of the business whereby the Company could be required to pay the liquidation preference on outstanding convertible preferred stock. As a result of these provisions, warrants to purchase convertible preferred stock were accounted for as liabilities. The Company adjusts the carrying value of such warrants to their estimated fair value at each reporting date and increases or decreases in the fair value of such warrants are recorded as interest expense in the consolidated statements of operations. The Company recorded changes to the fair value of the warrant liability of ($634) and $36 for the years ended December 29, 2012 and December 31, 2011, respectively. The changes in the warrant liability are recorded in interest expense.

Stock-Based Compensation

2004 Plan: The Company is authorized to issue 6,495 shares upon the exercise of options to purchase common shares to employees, directors and consultants under a stock option plan adopted in 2004, as amended (the 2004 Plan). The 2004 Plan provides for the issuance of both incentive stock options (ISOs) and nonstatutory stock options (NSOs). NSOs may be granted to employees, directors or consultants, while ISOs may be granted only to employees. Options granted vest over a maximum period of four years and expire ten years from the date of grant. New hire stock options generally vest over four years, 25% on the first anniversary of the date of grant and monthly thereafter for the remaining three years. Stock options are not participating in any dividends declared by the Company.

2012 Plan: In April 2012, the Company’s board of directors adopted the 2012 Equity Incentive Plan (the 2012 Plan) and the stockholders approved it in May 2012. The 2012 Plan became effective on the completion of the IPO. The 2012 Plan authorizes the grant of ISOs, NSOs, stock appreciation rights, restricted stock, stock units, and performance cash awards.

2012 ESPP: In April 2012, the Company’s board of directors adopted the 2012 Employee Stock Purchase Plan (the 2012 ESPP) and the stockholders approved it in May 2012. The 2012 ESPP became effective on the completion of the IPO. A total of 1,000 shares of common stock will be made available for sale under the 2012 ESPP. The 2012 ESPP permits participants to purchase common stock at a discount through contributions of up to 15% of their eligible compensation. The 2012 ESPP will be implemented through offering periods of approximately six months in duration. The purchase price of shares will be 85% of the lower of the fair market value of the Company’s common stock on the first trading day of each offering period or on the purchase date. No offering periods have commenced to date with respect to the 2012 ESPP.

The Company uses the Black-Scholes valuation model to calculate the fair value of stock options. The fair value of stock options was estimated at the grant date using the following weighted-average assumptions:

F-14

Peregrine Semiconductor Corporation

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except per share amounts)

	Years Ended
	December 28, 2013			December 29, 2012			December 31, 2011
Expected term (years)	5.00			5.00			5.24
Risk-free interest rate	0.80		%	0.72		%	1.26		%
Dividend rate	—			—			—
Volatility	61		%	62		%	61		%
Forfeiture rate	3		%	3		%	3		%
Estimated fair value per stock option	$	5.26		$	8.37		$	4.47

The risk-free interest rate assumption was based on the U.S. Treasury’s rates for U.S. Treasury constant maturities similar to those of the expected term of the award being valued. The assumed dividend yield was based on the Company’s expectation of not paying dividends in the foreseeable future. The Company utilizes data of peer companies to determine the weighted average expected term in an effort to better align the expected term of the Company’s options with the term experienced by the Company’s peers. In addition, due to the Company’s limited historical data, the estimated volatility incorporates the historical volatility of comparable companies whose share prices are publicly available.

The following summarizes activity related to the Company’s stock options under the 2004 Plan and 2012 Plan at December 28, 2013:

	Options Outstanding		Weighted-Average Exercise  Price		Aggregate Intrinsic  Value		Weighted-Average Remaining Contractual  Term (Years)
Outstanding at December 25, 2010	6,135		$	2.86	$	37,360	7.04
Granted	1,349		9.69
Exercised	(105	)	1.84
Forfeited	(139	)	5.94
Outstanding at December 31, 2011	7,240		$	4.11	$	34,493	6.68
Granted	903		15.98
Exercised	(432	)	1.07
Forfeited	(109	)	8.49
Outstanding at December 29, 2012	7,602		$	5.61	$	69,449	6.35
Granted	1,862		10.27
Exercised	(857	)	2.13
Forfeited	(380	)	12.52
Outstanding at December 28, 2013	8,227		$	6.71	$	19,870	6.27
Vested and expected to vest at December 28, 2013	8,076		$	6.63	$	19,870	6.22
Exercisable at December 28, 2013	5,023		$	4.15	$	19,805	4.76

Total stock-based compensation expense recognized during the years ended December 28, 2013, December 29, 2012, and December 31, 2011 was comprised of the following:

	Years Ended
	December 28, 2013		December 29, 2012		December 31, 2011
Cost of net revenue	$	883	$	588	$	431
Research and development	2,097		1,419		762
Selling, general and administrative	3,635		2,430		1,891
	$	6,615	$	4,437	$	3,084

F-15

Peregrine Semiconductor Corporation

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except per share amounts)

The total intrinsic value of stock options exercised was $6,926, $5,491 and $757 for the years ended December 28, 2013, December 29, 2012, and December 31, 2011, respectively. Upon exercise, the Company issues new shares of stock. As of December 28, 2013, the unrecognized estimated stock-based compensation related to nonvested stock options granted as of that date was $13,108, which is expected to be recognized over a weighted-average period of approximately 2.1 years. If there are any modifications or cancellations of the underlying unvested securities, the Company may be required to accelerate, increase or cancel any remaining unearned stock-based compensation expense. Future stock-based compensation expense and unearned stock-based compensation will increase to the extent that the Company grants additional equity awards or assumes unvested equity awards in connection with acquisitions.

Shares Reserved for Future Issuance

The following common stock is reserved for future issuance at December 28, 2013 and December 29, 2012:

	December 28, 2013	December 29, 2012
Common stock warrants	2	2
Stock awards issued and outstanding	8,227	7,602
Authorized for grants under the 2012 Plan and 2012 ESPP	3,787	3,996
	12,016	11,600

6. Income Taxes

Income (loss) before income tax consisted of the following for the years ended:

	December 28, 2013			December 29, 2012		December 31, 2011
Domestic	$	(4,404	)	$	6,946	$	(9,849	)
Foreign	420			238		363
Income (loss) before income taxes	$	(3,984	)	$	7,184	$	(9,486	)

The provision (benefit) for income taxes is as follows for the years ended:

	December 28, 2013			December 29, 2012			December 31, 2011
Current (benefit) provision:
Federal	$	(81	)	$	(300	)	$	20
State	(32		)	49			—
Foreign	137			141			175
Total current	24			(110		)	195
Deferred provision:
Federal	—			—			—
State	—			—			—
Foreign	43			22			1
Total deferred	43			22			1
Total income tax provision (benefit)	$	67		$	(88	)	$	196

A reconciliation of the federal statutory rate to the effective rate is as follows:

F-16

Peregrine Semiconductor Corporation

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except per share amounts)

	December 28, 2013		December 29, 2012		December 31, 2011
Income tax provision (benefit) on earnings at federal statutory rate	(35.0	)%	35.0	%	(35.0	)%
State tax provision (benefit), net of federal benefit	0.9		3.2		(2.3	)
Federal and state tax credits	(74.6	)	(8.1	)	(15.8	)
Change in valuation allowance	116.2		(47.9	)	55.2
Stock-based compensation	(7.9	)	4.1		4.2
Valuation of warrants	—		3.1		(0.1	)
Deemed repatriation of foreign earnings	—		3.6		—
Nondeductible expenses and other permanent differences, net	2.1		5.8		(4.1	)
Income tax provision (benefit)	1.7	%	(1.2	)%	2.1	%

The components of the Company’s deferred tax assets and liabilities are summarized as follows:

	December 28, 2013			December 29, 2012
Deferred tax assets:
Net operating loss carryforwards	$	55,010		$	55,758
Research tax credit carryforwards	10,177			7,232
Accrued expenses and reserves	9,559			6,378
Foreign deferred tax assets	—			12
Total deferred tax assets	74,746			69,380
Deferred tax liabilities:
Depreciation	(3,669		)	(2,918		)
Foreign deferred tax liabilities	(32		)	—
Total deferred tax liabilities	(3,701		)	(2,918		)
Less valuation allowance	(71,077		)	(66,450		)
Net deferred tax asset (liability)	$	(32	)	$	12

The valuation allowance has been established to offset domestic deferred tax assets, as realization of such assets is not considered to be more likely than not due to the Company’s recent history of losses and uncertainties regarding the Company’s ability to generate future taxable income sufficient to utilize the existing deferred tax assets prior to their expiration.

At December 28, 2013, the Company had U.S. federal and state net operating loss (NOL) carryforwards of approximately $147,545 and $102,481, respectively, after taking into consideration the impact of Internal Revenue Code Section 382 as discussed below. The federal net loss carryforwards will expire between 2018 and 2031, unless previously utilized. The state net loss carryforwards will expire between 2014 and 2031, unless previously utilized.

During the year ended December 28, 2013, the Company generated excess tax benefits of approximately $1,654 from the settlement of certain stock awards. The tax benefit will be recorded as a credit to additional paid-in capital in the year the deduction reduces income tax payable.

The Company had tax credit carryforwards of approximately $7,226 for federal and $9,934 for state purposes at December 28, 2013. The federal credits will begin to expire in 2024. The state research and development tax credit does not expire.

Pursuant to Sections 382 and 383 of the Internal Revenue Code (the Code), annual use of the Company’s NOL and research credit carryforwards may be limited in the event a cumulative change in ownership of 50% of certain stockholders occurs within a three year period. An ownership change may limit the amount of NOL and research credit carryforwards that can be utilized annually to offset future taxable income and tax, respectively. In general, an “ownership change” as defined by

F-17

Peregrine Semiconductor Corporation

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except per share amounts)

Section 382 of the Code results from a transaction or series of transactions over a three-year period resulting in an ownership change of more than 50 percentage points of the outstanding stock of a company by certain stockholders.

The Company completed a study to assess whether an ownership change has occurred since the Company’s formation through December 28, 2013. Based upon this study, the Company believes that several ownership changes have occurred.  The Company has reduced its deferred tax assets related to the NOL and R&D tax credit carryovers that are anticipated to expire unused as a result of the ownership changes. These tax attributes have been excluded from deferred tax assets with a corresponding reduction of the valuation allowance with no net effect on income tax expense or the effective tax rate. Future ownership changes may further limit the Company’s ability to utilize its remaining tax attributes. 

As of December 28, 2013, the Company has not provided for U.S. federal and state income taxes and foreign withholding taxes on approximately $237 of undistributed earnings of certain foreign subsidiaries as these earnings are considered indefinitely reinvested outside of the United States. Determination of the amount of any unrecognized deferred income tax liability on this temporary difference is not practicable due to the complexities of the hypothetical calculation. If management decides to repatriate such foreign earnings in future periods, the Company may incur incremental U.S. federal and state income taxes as well as foreign withholding taxes. However, the Company's intent is to keep these funds indefinitely reinvested outside the U.S. and its current plans do not demonstrate a need to repatriate them to fund U.S. operations. For certain earnings of foreign subsidiaries not considered indefinitely reinvested, such as Subpart F of the U.S. Internal Revenue Code (Subpart F), the Company has provided U.S. income taxes and foreign withholding taxes on these undistributed earnings. As of the year ended December 28, 2013, the Company recorded U.S. income taxes and foreign withholding taxes on $774 of undistributed earnings of foreign subsidiaries. During 2012, the Company recorded U.S. income taxes on approximately $900 of Subpart F earnings of foreign subsidiaries.

The following table summarizes the activity related to the Company’s unrecognized tax benefits:

	December 28, 2013			December 29, 2012			December 31, 2011
Balance at beginning of year	$	3,742		$	2,035		$	1,863
Increases (decreases) related to prior year tax positions	861			1,621			(5		)
Increases related to current year tax positions	1,196			279			177
Expirations of the statute of limitations for the assessment of taxes	(68		)	(193		)	—
Balance at end of year	$	5,731		$	3,742		$	2,035

Approximately $68 and $261 of the total unrecognized tax benefits at December 29, 2012 and December 31, 2011, respectively, would reduce the Company’s annual effective tax rate if recognized, and the remainder would have no effect as long as the Company’s deferred tax assets remain subject to a valuation allowance.

The Company does not anticipate any increases or decreases in the unrecognized tax benefit over the next 12 months.

Due to the NOL and credit carryforwards, the U.S. federal and state returns are open to examination by the Internal Revenue Service and state jurisdictions for years 1998 through 2012. The foreign income tax returns are open to examination for the years 2011 through 2013.

The Company’s policy is to recognize interest expense and penalties related to income tax matters as a component of income tax expense. There was approximately $12 accrued interest and penalties associated with uncertain tax positions as of December 29, 2012 and no accrued interest as of December 28, 2013. The amount of interest and penalties recognized during the years ended December 28, 2013, December 29, 2012, and December 31, 2011 was $12, $85, and $20, respectively.

7. Commitments and Contingencies

Leases

The Company leases its primary operating facilities in San Diego, CA under operating lease agreements which expire on December 31, 2015. Future minimum annual payments under the operating lease for fiscal 2014 and 2015 are approximately $898 and $953, respectively. In addition, the Company leases certain equipment and software under operating lease agreements which expire between 2014 and 2016. Total operating lease and license expense was $4,045, $3,606, and $3,154 for the years ended December 28, 2013, December 29, 2012, and December 31, 2011, respectively.

F-18

Peregrine Semiconductor Corporation

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except per share amounts)

Annual future minimum obligations under operating leases and licensing agreements as of December 28, 2013, are as follows:

Fiscal years:
2014	$	2,428
2015	1,366
2016	51
Total minimum lease payments	$	3,845

Long-term debt obligations

In May 2013, the Company amended its existing loan and security agreement, which increased the maximum line of credit availability up to $25,000 in accounts receivable financing. The Company is obligated to pay interest at the rate of LIBOR plus 2.0% to 2.5% subject to certain covenants. Interest is payable monthly with the principal due at the maturity date, December 31, 2015. At December 28, 2013 and December 29, 2012, there was no outstanding balance and there was $19,178 and $14,414 available, respectively. The agreement contains certain financial covenants, including covenants relating to our required liquidity ratio and minimum tangible net worth. The Company was in compliance with its financial covenants at December 28, 2013.

Legal Proceedings

On February 14, 2012, the Company filed a lawsuit in the U.S. District Court for the Central District of California, which was subsequently moved to the U.S. District Court for the Southern District of California. The action alleges the infringement of five of the Company’s patents relating to RFICs and switching technology by RF Micro Devices, Inc. (RFMD). The lawsuit alleges that certain of RFMD’s products infringe the Company’s patents relating to silicon on insulator (SOI) design technology for RFICs and seeks, in addition to damages, to permanently enjoin RFMD from further infringement. On March 26, 2013, the Company filed an additional lawsuit against RFMD in the U.S. District Court for the Southern District of California alleging infringement of a sixth patent relating to RFICs and switching technology by RFMD. On April 25, 2013, the Company consolidated these two U.S. District Court actions into one lawsuit. On September 27, 2013, the U.S. District Court set a trial date for November 12, 2014. On December 12, 2013, RFMD filed a counterclaim alleging the Company violates a patent owned or licensed by RFMD. Pursuing these actions is costly and could impose a significant burden on management and employees. The Company may receive unfavorable interim rulings in the course of this litigation and there can be no assurance that a favorable outcome will ultimately be obtained. The Company believes the outcome of this pending litigation will not have, individually or in the aggregate, a material adverse effect on its consolidated financial statements.

On November 14, 2013, representatives of the U.S. Department of Homeland Security (DHS), in collaboration with the United States Attorney’s Office for the Southern District of California (USAO), executed a federal search warrant at the Company's San Diego facilities in connection with an investigation into exports and temporary imports of certain products sold in the aerospace market. The Company is cooperating fully with the USAO and DHS officials. No claims have been asserted and no amounts have been accrued for this contingency in the consolidated financial statements.

The U.S. Department of State, Office of Defense Trade Controls Compliance (USDS), is conducting a review of the Company’s compliance with the Arms Export Control Act (AECA) and the AECA’s implementation of International Traffic In Arms Regulations (ITAR).  Based on this review the Company could be subject to continued investigation and potential regulatory consequences related to these violations ranging from a no-action letter, government oversight of facilities and export transactions, monetary penalties of up to $500 per violation, and in certain cases, debarment from government contracting, denial of export privileges, and criminal penalties. No claims have been asserted and no amounts have been accrued for this contingency in the consolidated financial statements. Furthermore, due to the preliminary nature of the investigation and the USDS review, the Company believes it is not possible to estimate the likelihood of an unfavorable outcome or the possible loss or range of losses in the event of an unfavorable outcome.

The Company monitors the status of these and other contingencies on an ongoing basis to ensure amounts are recognized and/or disclosed in our financial statements and footnotes as required by ASC 450, Loss Contingencies. At the time of this filing, the Company had not recorded any accrual for loss contingencies associated with its legal proceedings as losses resulting from such matters were determined not to be probable.

F-19

Peregrine Semiconductor Corporation

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except per share amounts)

From time to time, the Company is subject to various claims and suits arising in the ordinary course of business, including commercial, employment and environmental matters. The Company does not expect that the resolution of these matters will have a material adverse effect on its consolidated financial position or results of operations.

Commitments

The Company has open non-cancelable inventory purchase commitments of $12,345 as of December 28, 2013. Inventory purchase obligations represent purchase commitments for fixed prices and quantities of wafers, assembly, and test services. We expect to receive and pay for the majority of these materials and services during the next twelve months.

8. Supply and Prepayment Agreement

In March 2012, the Company entered into a supply and prepayment agreement with Murata Manufacturing Company, Ltd. (Murata). The agreement is for an initial term of 18 months. Under the terms of the original agreement, Murata agreed to prepay on certain purchase orders placed through a third party distributor and to pay the Company a total deposit of $14,000 between March and July 2012. On September 29, 2012, the Company and Murata agreed to reduce the deposits from $14,000 to $13,000. The Company has been repaying the deposit at a rate based on the number of RFICs purchased by Murata over the four quarters starting from the fourth quarter of fiscal 2012 of up to $13,000. As of December 28, 2013, the Company repaid $12,084 under the supply and prepayment agreement with Murata resulting in a remaining customer deposit of $916.

As of December 29, 2012, the Company received prepayments on purchases made by Macnica, which were applied against outstanding accounts receivable balances. There is no remaining prepayment as of December 28, 2013 as the agreement concluded on March 31, 2013 and the deposit was fully utilized in April 2013. As of December 29, 2012, customer deposits included in prepayments on purchase orders from Macnica totaled $11,425.

During 2012, the Company paid $4,000 in deposits to suppliers to support production levels. During the year ended December 28, 2013, the Company received $3,755 in deposit repayments from suppliers resulting in a remaining balance of $245, which is included in prepaids and other current assets.

9. Restructuring

During December 2013, the Company made adjustments to reduce operating expense. These actions included consolidating office locations and reduction in employees across the Company’s operations in the U.S. and Japan. The restructuring was driven by long-term strategic and operational decisions.

The following table summarizes the restructuring activity and related accrual at December 28, 2013:

	Balance at December 29, 2012		Current Charges		Cash Payments			Balance at December 28, 2013
Employee termination benefits	$	—	$	636	$	(218	)	$	418
Lease and other contract termination costs	—		73		(35		)	38
Total	$	—	$	709	$	(253	)	$	456

The remaining restructuring accrual balance of $456 as of December 28, 2013 is included in accrued liabilities and is expected to be paid in the first quarter of fiscal 2014. The accrual balance approximates fair value due to the short-term payment period. During the year ended December 28, 2013, the Company recorded restructuring expense of $340 in cost of net revenues and $369 in selling, general and administrative.

Subsequent to the year ended December 28, 2013, on January 30, 2014, the Company approved a restructuring plan. The plan consists of a reduction in force which will be substantially completed by the end of the first quarter of 2014. The total charge resulting from this plan is expected to be approximately $1,500 to $2,000.

F-20

10. Employee Benefits

The Company has a defined contribution 401(k) plan for employees who are at least 21 years of age. Under the terms of the plan, employees may make voluntary contributions as a percent of compensation, but not in excess of the maximum amounts allowed under the Internal Revenue Code. The Company’s contributions to the plan are discretionary and no contributions were made by the Company for any of the periods presented.

11. Concentrations and Geographic Information

The Company sells a majority of its products throughout North America, Asia and Europe. The Company makes periodic evaluations of the credit worthiness of its customers and does not require collateral for credit sales. The Company recognizes an allowance for doubtful accounts relating to accounts receivable for amounts deemed uncollectible. The Company considers customer specific issues, such as financial stability and ability to pay, when determining collectability of accounts receivable and appropriate allowances to record. The Company’s allowance for doubtful accounts was $100 as of December 28, 2013 and December 29, 2012.

Customers that exceeded 10% of total net revenue were as follows:

	Years Ended
	December 28, 2013		December 29, 2012		December 25, 2010
Macnica	69	%	72	%	48	%
Richardson	11	%	11	%	16	%

Customers whose balance represented greater than 10% of accounts receivable were as follows:

	December 28, 2013		December 29, 2012
Macnica	50	%	43	%
Richardson	*		14	%

*     Less than 10% of accounts receivable for the respective period end

Net revenue is allocated to the geographic region where the customer, or its business unit that makes the purchase is geographically based, or where the services were provided. Net revenue by geographic region was as follows:

	Years Ended
	December 28, 2013				December 29, 2012				December 31, 2011
United States	$	35,089	17	%	$	34,489	17	%	$	31,921	30	%
Japan	142,389		71		147,458		72		52,062		48
All others	24,838		12		21,961		11		23,788		22
	$	202,316	100	%	$	203,908	100	%	$	107,771	100	%

As of December 28, 2013 and December 29, 2012 substantially all of the Company’s long-lived tangible assets are located in the U.S.

In addition, four vendors supplied 95% and 98% of the Company’s raw material for the years ended December 28, 2013 and December 29, 2012, respectively.

12. Segment Information

The Company operates in one segment related to the design, manufacturing and marketing of high performance RFICs for the space and military, broadband, industrial, mobile device, test and measurement equipment, and wireless infrastructure markets. The Company’s chief operating decision-maker is its chief executive officer, who reviews operating results on an aggregate basis and manages the Company’s resources and operations as a single operating segment.

F-21

13. Quarterly Financial Data (Unaudited)

The following table presents our unaudited quarterly financial data. In our opinion, this information has been prepared on a basis consistent with that of our audited consolidated financial statements and all necessary material adjustments, consisting of normal recurring accruals and adjustments, have been included to present fairly the unaudited quarterly financial data. Our quarterly results of operations for these periods are not necessarily indicative of future results of operations.

	Net Revenue		Gross Profit		Net Income (Loss)			Diluted  Net Income (Loss) Per Share *
Year Ended December 28, 2013
Fourth Quarter	$	43,324	$	15,607	$	(6,828	)	$	(0.21	)
Third Quarter	60,002		25,253		4,433			0.12
Second Quarter	52,365		20,719		(448		)	(0.01		)
First Quarter	46,625		19,817		(1,208		)	(0.04		)
Total	$	202,316	$	81,396	$	(4,051	)
Year Ended December 29, 2012
Fourth Quarter	$	62,999	$	27,282	$	5,627		$	0.15
Third Quarter	60,575		25,015		4,713			0.10
Second Quarter	43,639		16,241		(26		)	(0.01		)
First Quarter	36,695		11,235		(3,042		)	(1.10		)
Total	$	203,908	$	79,773	$	7,272

*    The sum of the four quarters may not agree to the year total due to rounding within a quarter or the inclusion or exclusion of common stock equivalents in certain periods.

F-22

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.

	PEREGRINE SEMICONDUCTOR CORPORATION
Date: February 19, 2014	By:	/s/ Jay Biskupski
		Jay Biskupski
		Chief Financial Officer
		(Principal Financial and Accounting Officer)

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints James S. Cable and Jay Biskupski his true and lawful attorney-in-fact and agent, with full power of substitution and re-substitution, for him and in his name, place and stead, in any and all capacities to sign any and all amendments to this Annual Report on Form 10-K, and to file the same, with all exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorney-in-fact and agent full power and authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

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

Dated: February 19, 2014	By:	/s/ James S. Cable
		James S. Cable
		Chief Executive Officer, President, and Chairman
		(Principal Executive Officer)
Dated: February 19, 2014	By:	/s/ Jay Biskupski
		Jay Biskupski
		Chief Financial Officer
		(Principal Financial and Principal Accounting Officer)
Dated: February 19, 2014	By:	/s/ Paul D’Addario
		Paul D’Addario
		Director
Dated: February 19, 2014	By:	/s/ John H. Allen
		John H. Allen
		Director
Dated: February 19, 2014	By:	/s/ Jeffrey K. Belk
		Jeffrey K. Belk
		Director
Dated: February 19, 2014	By:	/s/ Gary A. Monetti
		Gary A. Monetti
		Director
Dated: February 19, 2014	By:	/s/ Robert Pavey
		Robert Pavey
		Director
Dated: February 19, 2014	By:	/s/ Carl Schlachte
		Carl Schlachte
		Director
Dated: February 19, 2014	By:	/s/ Elton B. Sherwin
		Elton B. Sherwin
		Director
Dated: February 19, 2014	By:	/s/ Anthony S. Thornley
		Anthony S. Thornley
		Director

INDEX TO EXHIBITS

		Incorporated by Reference				Filed Herewith
Exhibit No.	Description	Form	File No.	Exhibit	Filing Date
3.1	Amended and Restated Certificate of Incorporation.	8-K	001-35623	3.1	August 17, 2012
3.2	Amended and Restated Bylaws.	8-K	001-35623	3.2	August 17, 2012
4.1	Reference is made to Exhibits 3.1 and 3.2.
4.2	Seventh Amended and Restated Investor Rights Agreement, dated August 17, 2006, by and among the Registrant, certain stockholders, and the investors listed on the signature pages thereto.	S-1	333-170711	4.3	November 19, 2010
4.5	Warrant to Purchase Stock issued June 18, 2003 to Silicon Valley Bank.	S-1	333-170711	4.5	November 19, 2010
4.6	Amendment to Warrant Agreement, dated April 2008, between SVB Financial Group and the Registrant.	S-1	333-170711	4.6	November 19, 2010
10.1†	Form of Indemnification Agreement between the Registrant and each of its directors and executive officers.	S-1	333-170711	10.1	February 16, 2011
10.2†	Peregrine Semiconductor Corporation 1996 Stock Plan.	S-1	333-170711	10.2	November 19, 2010
10.3†	Form of 1996 Stock Plan Stock Option Agreement.	S-1	333-170711	10.3	November 19, 2010
10.4†	Peregrine Semiconductor Corporation 2004 Stock Plan.	S-1	333-170711	10.4	February 16, 2011
10.5†	Form of 2004 Stock Plan Stock Option Agreement.	S-1	333-170711	10.5	November 19, 2010
10.6†	Peregrine Semiconductor Corporation 2012 Equity Incentive Plan and forms of agreements thereunder.	S-1	333-170711	10.6	April 27, 2012
10.7†	Peregrine Semiconductor Corporation 2012 Employee Stock Purchase Plan.	S-1	333-170711	10.7	April 27, 2012
10.8†	2012 Executive Incentive Bonus Plan.	S-1	333-170711	10.8	April 27, 2012
10.9	Industrial Lease, dated April 20, 2000, between The Irvine Company and Continuous Computing Corporation.	S-1	333-170711	10.9	February 16, 2011
10.10	Consent to Assignment and Amendment to Lease dated March 19, 2007.	S-1	333-170711	10.10	February 16, 2011
10.11	First Amendment to Lease, dated August 23, 2005, between The Irvine Company and Continuous Computing Corporation.	S-1	333-170711	10.11	February 16, 2011
10.12	Second Amendment to Lease dated June 27, 2007.	S-1	333-170711	10.12	February 16, 2011
10.13	Mutual Assignment of Lease Agreement, dated March 1, 2007, between Continuous Computing Corporation and the Registrant.	S-1	333-170711	10.13	February 16, 2011
10.14	Third Amendment to Lease, dated August 6, 2010, between The Irvine Company and the Registrant.	S-1	333-170711	10.14	February 16, 2011
10.15	Distributor Agreement, dated December 23, 2010, between Richardson Electronics, Ltd. and the Registrant.	S-1	333-170711	10.15	February 16, 2011
10.16	Distribution Agreement, dated June 30, 2008, between Clavis (a division of Macnica, Inc.) and the Registrant.	S-1	333-170711	10.16	February 16, 2011

Incorporated by Reference Filed Herewith

Exhibit No.	Description	Form	File No.	Exhibit	Filing Date
10.17	Addendum I to Distribution Agreement, dated June 30, 2010, between Clavis (a division of Macnica, Inc.) and the Registrant.	S-1	333-170711	10.17	February 16, 2011
10.18	Second Amended and Restated Loan and Security Agreement, dated June 23, 2010, between Silicon Valley Bank and the Registrant.	S-1	333-170711	10.18	November 19, 2010
10.19†	Letter Agreement, dated April 26, 2010, between David R. Shepard and the Registrant.	S-1	333-170711	10.23	February 16, 2011
10.20†	Letter Agreement, dated April 26, 2012, between James S. Cable, Ph.D. and the Registrant.	S-1	333-170711	10.24	April 27, 2012
10.21†	Letter Agreement, dated April 26, 2012, between Jay C. Biskupski and the Registrant.	S-1	333-170711	10.25	April 27, 2012
10.22	First Amendment to Second Amended and Restated Loan and Security Agreement, dated April 22, 2011, between Silicon Valley Bank and the Registrant.	S-1	333-170711	10.26	April 2, 2012
10.23	Second Amendment to Second Amended and Restated Loan and Security Agreement, dated December 30, 2011, between Silicon Valley Bank and the Registrant.	S-1	333-170711	10.27	April 2, 2012
10.24#	Supply and Prepayment Agreement, dated March 23, 2012, between the Registrant and Murata Manufacturing Company, Ltd.	S-1	333-170711	10.28	April 12, 2012
10.25	Third Amendment to Second Amended and Restated Loan and Security Agreement, dated February 14, 2013, by and between Silicon Valley Bank and Peregrine Semiconductor Corporation	10-Q	333-170711	10.25	May 6, 2013
10.26	Fourth Amendment to Second Amended and Restated Loan and Security Agreement, dated May 3, 2013, by and between Silicon Valley Bank and Peregrine Semiconductor Corporation	10-Q	333-170711	10.26	May 6, 2013
10.27##	License Agreement between Peregrine Semiconductor Corporation and Murata Manufacturing Company, Ltd. dated May 28, 2013	10-Q	333-170711	10.27	August 5, 2013
10.28	Employment agreement between Carl Burrow and Peregrine Semiconductor Corporation					X
21.1	List of subsidiaries.	S-1	333-170711	21.1	November 19, 2010
23.1	Consent of Independent Registered Public Accounting Firm.					X
24.1	Power of Attorney (contained in the signature page to this report).
31.1	Certification of Chief Executive Officer pursuant to Rules 13a-14 and 15d-14 promulgated pursuant to the Securities Exchange Act of 1934, as amended					X
31.2	Certification of Chief Financial Officer pursuant to Rules 13a-14 and 15d-14 promulgated pursuant to the Securities Exchange Act of 1934, as amended					X
32.1	Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002					X
32.2	Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002					X
101.INS*	XBRL Instance Document					X
101.SCH*	XBRL Taxonomy Extension Schema Document					X
101.CAL*	XBRL Taxonomy Extension Calculation Linkbase Document					X

101.DEF*	XBRL Taxonomy Extension Definition Linkbase Document	X
101.LAB*	XBRL Taxonomy Extension Label Linkbase Document	X
101.PRE*	XBRL Taxonomy Extension Presentation Linkbase Document	X

†	Indicates a management contract or compensatory plan.
#	Registrant has omitted portions of the referenced exhibit pursuant to an order granting confidential treatment under the Securities Act, issued August 7, 2012.
##	Registrant has omitted portions of the referenced exhibit pursuant to a request for confidential treatment.
*	In accordance with Rule 406T of Regulation S-T, the information in these exhibits is furnished and deemed not filed or part of a registration statement or prospectus for purposes of sections 11 or 12 of the Securities Act of 1933, is deemed not filed for purposes of section 18 of the Exchange Act of 1934, and otherwise is not subject to liability under these sections.

EX-10.28

PEREGRINE SEMICONDUCTOR CORPORATION

9380 CARROLL PARK DRIVE SAN DIEGO, CA 92121

December 1, 2012

Carl Burrow

Dear Carl:

Peregrine Semiconductor Corporation (the "Company") is pleased to offer you employment on the following terms, beginning on or about January 16, 2013 (the actual date of your commencement of employment, the “Start Date"). This offer is contingent upon completion of a satisfactory background reference check.

l. Position. Your title and position with the Company will be Vice President of Sales, and you will report to the Company's Chief Executive Officer. This is a full-time position and your place of employment will be our headquarters in San Diego. While you render services to the Company, you will not engage in any other employment, consulting or other business activity (whether full-time or part-time) that would create a conflict of interest with the Company. By signing this letter agreement (the "Agreement"), you confirm to the Company that you have no contractual commitments or other legal obligations that would prohibit you from performing your duties for the Company.

2.     Cash Compensation. Beginning on the Start Date, your annual base salary will be $240,000 per year, payable in accordance with the Company's standard payroll schedule. This salary will be subject to adjustment pursuant to the Company's employee compensation policies in effect from time to time. In addition you will be eligible to be considered for a cash-incentive bonus for each fiscal year of the Company (the "Bonus"). The Bonus (if any) will be awarded based on objective or subjective criteria established and approved by the Compensation Committee of the Board. Of your Bonus, 75% will be based upon the achievement of sales-driven targets, and the remaining 25% will be based on corporate-level targets. Your target Bonus will be equal to 75% of your annual base salary and your maximum Bonus will be equal to 155% of your annual base salary, in each case measured as of the last day of each fiscal year. Any Bonus amount will generally be paid quarterly with respect to the portion that relates to sales-driven targets and, with respect to the portion that relates to corporate level targets, annually when annual bonus payments are made to other Company executives. Each such payment will be paid within 2Y2 months after the close of the year in which the applicable performance period ends, but only if you are still employed by the Company at the time of payment. The determinations of the Compensation Committee with respect to your Bonus will be final and binding.

3. Stock Options. Promptly after the Start Date and subject to approval by the Compensation Committee of the Board, you will be granted an option to purchase 160,000 shares of the Company's Common Stock (the "Option"). The exercise price per share of the Option will be

Carl Burrow

December 1, 2012

Page 2

equal to the closing price per share of the Company's Common Stock as reported on the Nasdaq Global Market on the date of grant. The Option will be subject to the terms and conditions applicable to options granted under the Company's 2012 Equity Incentive Plan (the "Plan"), as described in the Plan and the applicable Stock Option Agreement. You will vest in 25% of the option shares upon your completion of twelve (12) continuous months after the Start Date, and the balance will vest in equal monthly installments over the next 36 months of continuous service, as described in the applicable Stock Option Agreement.

4. Additional Benefits. As a regular employee of the Company, you will be eligible to participate in the Company's standard employee benefits programs, as such are in effect from time to time. In addition, you will be entitled to paid vacation in accordance with the Company's vacation policy, as in effect from time to time. You will initially be entitled to four weeks of paid vacation per year.

5. Payments Upon Termination. If your employment with the Company terminates other than as set forth in Section 6 below, then (a) all vesting will cease immediately with respect to your then-outstanding Equity awards and (b) the only amounts payable to you by the Company will be (i) any unpaid base salary due for periods prior to the date of termination of your employment and (ii) any accrued but unused vacation through such termination date. Such payments, if any, will be made promptly upon termination and within the period of time mandated by law.

6.     Severance Benefits.

(a) General. If you are subject to an Involuntary Termination under certain circumstances described below, then you will be entitled to the benefits described in this Section 6. However, you will not be entitled to any of the benefits described in this Section 6 unless you have (i) returned all Company property in your possession, (ii) resigned as a member of any boards of any Company subsidiary, to the extent applicable, and (iii) executed a general release of all claims that you may have against the Company or persons affiliated with the Company, substantially in the form attached hereto as Exhibit A (the "Release"). You must execute and return the Release on or before the date specified by the Company in the Release (the "Release Deadline"). The Release Deadline will in no event be later than 50 days after your Separation. If you fail to return the Release on or before the Release Deadline, or if you revoke the Release, then you will not be entitled to the benefits described in this Section 6.

Notwithstanding the foregoing, the Company may immediately discontinue all benefits or revoke any vesting acceleration described in this Section 6 (in addition to pursuing all other legal and equitable remedies) if you fail to comply with any provision of the Confidential Information, Invention Assignment, Disclosure and Non-Solicitation Agreement between you and the Company (the "Confidentiality Agreement"), a copy of which is attached hereto as Exhibit B, the terms of Section 8 below or any other agreement with the Company that by its terms continues in force following your Separation.

(b)     Benefits. Subject to the requirements set forth in Section 6(a) above:

(i)     Salary Continuation.

Carl Burrow

December 1, 2012

Page 3

A.Not in Connection with a Change in Control. If you experience a Termination without Cause more than 90 days after your Start Date and provided you are not entitled to salary continuation benefits under the next following paragraph (B), then you will be entitled to salary continuation as set forth in this paragraph. In connection with such Termination without Cause, the Company will continue to pay your base salary for a period that after that initial 90-day period equals one month and following the second anniversary of your Start Date equals six months, with the number of months of salary continuation increasing from one month to six months between the 90th day and the second anniversary on a straight-line basis rounded down to the nearest whole month.

B.     In Connection with a Change in Control. If you experience an Involuntary Termination on or within 12 months after the effective date of a Change in Control and provided you have not previously become entitled to salary continuation benefits under the preceding paragraph (A), then the Company or its successor will continue to pay your base salary for a period a period of six months beginning on the day after your Separation.

C.     Payment Mechanics. To the extent you become entitled to salary continuation benefits under Section 6(b)(i)(A) or (B) above, your base salary will be paid at the rate in effect at the time of your Separation and in accordance with the Company's standard payroll procedures. Subject to the Company's having first received an effective Release pursuant to Section 6(a) above, the salary continuation payments will commence or be made, as applicable, within 60 days after your Separation and, once they commence, will include any unpaid amounts accrued from the date of your Separation. However, if the 60-day period described in the preceding sentence spans two calendar years, then the payments will in any event begin in the second calendar year.

(ii) Equity Acceleration Following Change in Control. If and only if your Involuntary Termination occurs on or within 12 months after the effective date of a Change in Control, then 100% of the unvested portion of your then-outstanding Equity awards will immediately vest and, to the extent applicable, become exercisable or settle; provided, however, that in the event acceleration of the settlement or distribution date of an award would result in additional taxes and penalties under Code Section 409A, then the vesting of such award shall accelerate but settlement or distribution of award shares (or cash, if applicable) shall occur on the date(s) specified in the agreement governing the award.

7.     Limitation on Payments.

(a) Scope of Limitation. This Section 7 will apply only if the accounting firm serving as the Company's independent public accountants immediately prior to a Change in Control (the "Accounting Firm") determines that the after-tax value of all Payments (as defined below) to you under Section 6 of this Agreement, taking into account the effect of all federal, state and local income taxes, employment taxes and excise taxes applicable to you (including the excise tax under Code Section 4999), will be greater after the application of this Section 7 than it was before the application of this Section 7. If this Section 7 applies, it will supersede any contrary provision of this Agreement. For purposes of this Section 7, the term "Company" will

Carl Burrow

December 1, 201 2

Page4

also include affiliated corporations to the extent determined by the Accounting Firm in accordance with Code Section 280G(d)(5).

(b) Basic Rule. In the event that the Accounting Firm determines that any payment or transfer by the Company to or for your benefit (a "Payment") would be nondeductible by the Company for federal income tax purposes because of the provisions concerning "excess parachute payments" in Code Section 2800 and pursuant to the regulations thereunder, then provided that Subsection (a) results in applicable of this Section 7, the aggregate present value of all Payments will be reduced (but not below zero) to the Reduced Amount. For purposes of this Section 7, the "Reduced Amount" will be the amount, expressed as a present value, which maximizes the aggregate present value of the Payments without causing any Payment to be nondeductible by the Company because of Code Section 280G.

(c) Reduction of Payments. If the Accounting Firm determines that any Payment would be nondeductible by the Company because of Code Section 280G, and if none of the Payments is subject to Code Section 409A, then the reduction will occur in the manner you elect in writing prior to the date of payment; provided, however, that if the manner elected by you pursuant to this sentence could in the opinion of the Company result in any of the Payments becoming subject to Code Section 409A, then the following sentence will instead apply. If any Payment is subject to Code Section 409A, or if you fail to elect an order under the preceding sentence, then the reduction will occur in the following order: (i) cancellation of acceleration of vesting of any Equity awards for which the exercise price (if any) exceeds the then-fair market value of the underlying Equity; (ii) reduction of cash payments (with such reduction being applied to the payments in the reverse order in which they would otherwise be made (that is, later payments will be reduced before earlier payments)); and (iii) cancellation of acceleration of vesting of Equity awards not covered under (i) above; provided, however, that in the event that acceleration of vesting of Equity awards is to be cancelled, such acceleration of vesting will be cancelled in the reverse order of the date of grant of such Equity awards (that is, later Equity awards will be canceled before earlier Equity awards).

(d) Fees of Accounting Firm and Required Data. The Company will pay all fees, expenses and other costs associated with retaining the Accounting Firm for the purposes described in this Section 7. You and the Company will provide to the Accounting Firm all data in the Company's possession or under its control that the Accounting Firm reasonably requires for the purposes described in this Section 7.

8.    Further Obligations to the Company.

(a) General. You acknowledge your obligations under, and agree to comply with, all applicable laws and all Company policies in effect at all times and from time to time during your employment with the Company. You further acknowledge and agree that such applicable laws or policies may relate to the general terms of your employment with the Company or to a specific component of your compensation. By way of example, such applicable laws or policies may include any Company recoupment or clawback policy, insider trading policy or code(s) of conduct or other policies adopted under, pursuant to or in light of, or

Carl Burrow

December 1, 2012

Page 5

requirements imposed by, the Sarbanes-Oxley Act of 2002 or the Dodd-Frank Wall Street Reform and Consumer Protection Act.

(b) Confidential Information. You agree to execute such additional documents as may be necessary to protect the Company's confidential and proprietary information, which such documents will supplement the Confidentiality Agreement (which such agreement will continue in full force and effect).

(c) Nonsolicitation. You acknowledge and agree that beginning on the Start Date and continuing until the first anniversary of your Separation, you will not directly or indirectly, personally or through others, solicit or attempt to solicit (on your own behalf or on behalf of any other person or entity) either (A) the employment of any employee or consultant of the Company or any of the Company's affiliates or (B) the business of any customer of the Company or any of the Company's affiliates.

9. Employment Relationship. Employment with the Company is for no specific period of time. Your employment with the Company remains "at will," meaning that either you or the Company may terminate your employment at any time and for any reason, with or without cause. Any contrary representations that may have been made to you are superseded by this Agreement. This is the full and complete agreement between you and the Company on this term. Although your job duties, title, compensation and benefits, as well as the Company's personnel policies and procedures, may change from time to time, the "at will" nature of your employment may only be changed in an express written agreement signed by you and a duly authorized officer of the Company (other than you).

l 0.     Tax Matters.

(a) General. All forms of compensation referred to in this Agreement are subject to reduction to reflect applicable withholding and payroll taxes and other deductions required by law. You are encouraged to obtain your own tax advice regarding your compensation from the Company. You agree that the Company does not have a duty to design its compensation policies in a manner that minimizes your tax liabilities, and you will not make any claim against the Company or its Board related to tax liabilities arising from your compensation.

(b)     Section 409A. For purposes of Code Section 409A, each payment under

Section 6(b) is hereby designated as a separate payment for purposes of Treasury Regulation

1.409A-2(b)(2). If the Company determines that you are a "specified employee" under Code Section 409A(a)(2)(B)(i) at the time of your Separation, then (i) any payments under this Agreement, to the extent that they are not exempt from Code Section 409A (including by operation of the next following sentence) and otherwise subject to the taxes imposed under Code Section 409A(a)(l ) (a "Deferred Payment"), will commence on the first business day following (A) the expiration of the six-month period measured from your Separation or (B) the date of your death and (ii) the installments that otherwise would have been paid prior to such date will be paid in a lump sum when such payments commence. Notwithstanding the foregoing, any amount paid under this Agreement that either (1) satisfies the requirements of the "short-term deferral" rule set forth in Treasury Regulation 1.409A-l (b)(4) or (2) (A) qualifies as a payment made as a

Carl Burrow

December 1, 2012

Page 6

result of an involuntary separation from service pursuant to Treasury Regulation 1.409A­ l(b)(9)(iii) and (B) does not exceed the Section 409A Limit will not constitute a Deferred Payment. The provisions of this Agreement are intended to comply with, or be exempt from, the requirements of Code Section 409A so that none of the payments and benefits to be provided under this Agreement will be subject to the additional tax imposed under Code Section 409A, and any ambiguities herein will be interpreted to so comply or be exempt. You and the Company agree to work together in good faith to consider amendments to this Agreement and to take such reasonable actions as are necessary, appropriate or desirable to avoid imposition of any additional tax or income recognition prior to actual payment to you under Code Section 409A. In no event will the Company reimburse you for any taxes that may be imposed on you as result of Code Section 409A.

11.         Interpretation, Amendment and Enforcement. Upon the Start Date, this Agreement, the Confidentiality Agreement and the Arbitration Agreement (attached hereto as Exhibit B) will constitute the complete agreement between you and the Company, contain all of the terms of your employment with the Company and supersede and replace any prior agreements, representations or understandings (whether written, oral, implied or otherwise) between you and the Company.     This Agreement may not be amended or modified, except by an express written agreement signed by both you and a duly authorized officer of the Company. The terms of this Agreement and the resolution of any disputes as to the meaning, effect, performance or validity of this Agreement or arising out of, related to, or in any way connected with, this Agreement, your employment with the Company or any other relationship between you and the Company (the "Disputes") will be governed by California law, excluding laws relating to conflicts or choice of law. You and the Company submit to the exclusive personal jurisdiction of the federal and state courts located in California in connection with any Dispute or any claim related to any Dispute. By signing this Agreement, you acknowledge and agree that you will no longer be eligible for any benefits or payments provided for in any such prior agreement, except as otherwise expressly provided in this Agreement.

12.     Successors and Assignment.

(a) Company's Successors. Any successor to the Company (whether direct or indirect and whether by purchase, lease, merger, consolidation, liquidation or otherwise) to all or substantially all of the Company's business and/or assets will assume the obligations under this Agreement and agree expressly to perform the obligations under this Agreement in the same manner and to the same extent as the Company would be required to perform such obligations in the absence of a succession. For all purposes under this Agreement, the term ''Company" shall include any such successor to the Company, or to the Company’s business and/or assets, that executes and delivers the assumption agreement described in this Section 12(a) or which becomes bound by the terms of this Agreement by operation of law.

(b) Employee's Successors. The terms of this Agreement and all of your rights hereunder will inure to the benefit of, and be enforceable by, your personal or legal representatives, executors, administrators, successors, heirs, distributees, devisees and legatees. All of your obligations under this Agreement are personal to you and may not be transferred or assigned by you at any time.

Carl Burrow

December 1, 2012

Page 7

13. Definitions. The following terms have the meaning set forth below wherever they are used in this Agreement:

"Board" means the Company's Board of Directors.

"Cause" means the occurrence of any one or more of the following: (a) your conviction by, or entry of a plea of "guilty" or "nolo contendere" in, a court of competent jurisdiction for any crime which constitutes a felony in the jurisdiction involved(b) your misappropriation of funds or commission of an act of fraud, whether prior or subsequent to the date hereof, upon the Company; (c) your material negligence in the scope of your services to the Company; (d) your breach of a material provision of any agreement with the Company; (e) your material failure to perform your duties to the Company; or (f) your failure to cooperate in good faith with a governmental or internal investigation of the Company or its directors, officers or employees, if the Company has requested your cooperation.

"Change in Control" means (a) any "person" (as such term is used in Sections

13(d) and 14(d) of the Exchange Act) becoming the "beneficial owner" (as defined in Rule 13d-3 of the Exchange Act), directly or indirectly, of securities of the Company representing more than fifty percent (50%) of the total voting power represented by the Company's then-outstanding voting securities; (b) the consummation of the sale or disposition by the Company of all or substantially all of the Company's assets; (c) the consummation of a merger or consolidation of the Company with or into any other entity, other than a merger or consolidation which would result in the voting securities of the Company outstanding immediately prior thereto continuing to represent (either by remaining outstanding or by being converted into voting securities of the surviving entity or its parent) more than fifty percent (50%) of the total voting power represented by the voting securities of the Company or such surviving entity or its parent outstanding immediately after such merger or consolidation; or (d) a change in the composition of the Board, as a result of which fewer than 50% of the incumbent directors are directors who either (i) had been directors of the Company on the date 12 months prior to the date of such change in the composition of the Board (the "Original Directors") or (ii) were appointed to the Board, or nominated for election to the Board, with the affirmative votes of at least a majority of the aggregate of (A) the Original Directors who were in office at the time of their appointment or nomination and (B) the directors whose appointment or nomination was previously approved in a manner consistent with this Sub clause (d)(ii).

A transaction will not constitute a Change in Control if its sole purpose is to change the state of the Company's incorporation or to create a holding company that will be owned in substantially the same proportions by the persons who held the Company's securities immediately before such transaction. In addition, if a Change in Control constitutes a payment event with respect to any Equity award which provides for a deferral of compensation and is subject to Code Section 409A, then notwithstanding anything to the contrary in this Agreement, the transaction with respect to such Equity award must also constitute a "change in control event" as defined in Treasury Regulation 1.409A-3(i)(5) to the extent required by Code Section

409A.

"Code" means the Internal Revenue Code of 1986, as amended.

Carl Burrow

December 1, 2012

Page 8

"Equity" means (a) all shares of Stock; (b) all options and other rights to purchase shares of Stock; (c) all stock units, performance units or phantom shares whose value is measured by the value of shares of Stock; and (d) all stock appreciation rights whose value is measured by increases in the value of shares of Stock.

"Exchange Act" means the Securities Exchange Act of 1934, as amended.

"Involuntary Termination" means either (a) your Termination Without Cause

(other than due to your death or Permanent Disability) or (b) your Resignation for Good Reason.

"Permanent Disability'' means your total and permanent disability as defined in

Code Section 22(e)(3).

"Resignation for Good Reason" means a Separation as a result of your resignation within 12 months after one of the following conditions has come into existence without your express written consent:

(a) A material reduction of your duties, authority and responsibilities, relative to your duties, authority and responsibilities as in effect immediately prior to such reduction, or the assignment to you of such reduced duties, authority and responsibilities;

(b) A reduction of at least 10% in your base salary or target Bonus in effect immediately prior to such reduction; provided however that it shall not be grounds for a Resignation for Good Reason if, prior to a Change in Control, the reduction to your base salary or target Bonus is part of an expense reduction program implemented by the Company which (i) applies proportionately to all Company officers, (ii) does not result in a reduction of more than 20% of your base salary or target Bonus, as applicable, and (iii) does not remain in place for more than 24 months. For the avoidance of doubt, and as an example only, if your target Bonus is 60% of your base salary before a reduction, a 10% reduction would mean a new target Bonus of 54% of your base salary;

(c) A relocation to a facility or a location more than thirty-five miles from your then-present location that materially increases your one-way commute; or

(d) The Company's material breach of this Agreement, including its failure to obtain the assumption of this Agreement by any successor (whether direct or indirect and whether by purchase, merger, consolidation, liquidation or otherwise) to all or substantially all of the Company’s business and/or assets.

A Resignation for Good Reason will not be deemed to have occurred unless you give the Company written notice of the condition within 90 days after the condition comes into existence and the Company fails to remedy the condition within 30 days after receiving your written notice.

Carl Burrow

December 1, 2012

Page 9

"Section 409A Limit" means the lesser of two times: (i) your annualized compensation based upon the annual rate of pay paid to you during the taxable year preceding your taxable year in which your termination of employment occurs, as determined under, and with such adjustments as are set forth in, Treasury Regulation 1.409A-l(b)(9)(iii)(A)(l) and any guidance issued with respect thereto or (ii) the maximum amount that may be taken into account under a qualified plan pursuant to Code Section 40l(a)(17) for the year in which your employment is terminated.

"Separation" means a "separation from service," as defined in the regulations under Code Section 409A.

"Stock" means the Common Stock of the Company.

"Termination Without Cause" means a Separation as a result of a termination of your employment by the Company without Cause, provided you are willing and able to continue performing services within the meaning of Treasury Regulation 1.409A-l(n)(l).

* * * * *

Carl Burrow

December 1, 2012

Page 10

You may indicate your agreement with these terms and accept this offer by signing and dating the enclosed duplicate original of this Agreement and returning it to me. This offer, if not accepted will expire the close of business on December 21, 2012. As required by law, your employment with the Company is contingent upon your providing legal proof of your identity and authorization to work in the United States.

Very truly yours,

PEREGRINE SEMICONDUCTOR CORPORATION

By: /s/ Jay Biskupski

Title: CFO

I have read and accept this employment offer:

/s/ Carl Burrow

Signature of Carl Burrow

Dated: December 21^st, 2012

Attachment

Exhibit A:     Release

Exhibit B:     Confidentiality Agreement

Exhibit C:     Arbitration Agreement

CONFIDENTIAL INFORMATION, INVENTION ASSIGNMENT, DISCLOSURE, AND NON-SOLICITATION AGREEMENT

As a condition of my employment with Peregrine Semiconductor Corporation, its subsidiaries, affiliates, successors or assigns (together "Peregrine"), and in consideration of my employment with Peregrine and my receipt of the compensation now and hereafter paid to me by Peregrine, I agree to the following:

1.Confidential Information.

a.Company Information. I agree at all times during the term of my employment and thereafter, to hold in strictest confidence, and not to use, except for the benefit of Peregrine, nor to disclose to any person, firm or corporation, without Peregrine’s written authorization or under a properly executed non-disclosure agreement, any Confidential Information of Peregrine. I understand that "Confidential Information" means any Peregrine proprietary information, technical data, trade secrets or know-how, including, but not limited to, research, product plans, products, services, customer lists and customers (including, but not limited to, customers of Peregrine on whom I called or with whom I became acquainted during the term of my employment), markets, software, developments, inventions, processes, formulas, technology, designs, drawings, engineering, hardware configuration information, marketing, finances or other business information disclosed to me by Peregrine either directly or indirectly in writing, orally or by drawings or observation of parts or equipment. I further understand that Confidential Information does not include any of the foregoing items which have become publicly known and made generally available through no wrongful act of mine.

b.Former Employer Information. I agree that I will not, during my employment with Peregrine, improperly use or disclose any proprietary information or trade secrets of any former or concurrent employer or other person or entity, and that I will not bring onto the premises of Peregrine any unpublished document or proprietary information belonging to any such employer, person or entity unless consented to in writing by such employer, person or entity. I agree that I will indemnify, defend, and hold harmless Peregrine and its officers, directors, shareholders, partners, employees, agents, and representatives against all liability, claims, costs, damages, and expenses including attorney’s fees incurred by them arising or growing out of any claim of misappropriation of trade secrets or interference with contractual relations made against me by others because of acts made by me while employed by Peregrine.

Initials: /s/CNB

c.Third Party Information. I recognize that Peregrine has received, and in the future will receive from third parties their confidential or proprietary information subject to a duty on Peregrine’s part to maintain the confidentiality of such information and to use it only for certain limited purposes. I agree to hold all such confidential or proprietary information in the strictest confidence and not to disclose it to any person, firm or corporation or to use it except as necessary in carrying out my work for Peregrine consistent with Peregrine's agreement with such third party.

2.Inventions.

a.Inventions Retained and Licensed. I have attached hereto, as Exhibit A, a list describing all inventions, original works of authorship, developments, improvements, and trade secrets which were made by me prior to my employment with Peregrine (collectively referred to as "Prior Inventions"), which belong to me, which relate to Peregrine's proposed business, products or research and development, and which are not assigned to Peregrine hereunder; or, if no such list is attached, I represent that there are no such Prior Inventions. If in the course of my employment with Peregrine, I incorporate into a Peregrine product, process or machine a Prior Invention owned by me or in which I have an interest, Peregrine is hereby granted and shall have a nonexclusive, royalty-free, irrevocable, perpetual, worldwide license to make, have made, modify, use and sell such Prior Invention as part of or in connection with such product, process or machine.

b.Assignment of Inventions. I agree that I will promptly make full written disclosure to Peregrine, will hold in trust for the sole right and benefit of Peregrine, and hereby assign to Peregrine, or its designee, all my right, title, and interest in and to any and all inventions, original works of authorship, developments, concepts, improvements, designs, discoveries, ideas, trademarks or trade secrets, whether or not patentable or registrable under copyright or similar laws, which I may solely or jointly conceive or develop or reduce to practice, or cause to be conceived or developed or reduced to practice, during the period of time I am employed with Peregrine (collectively referred to as "Inventions"), except as provided in Section (f) below. I further acknowledge that all original works of authorship which are made by me (solely or jointly with others) within the scope of and during the period of my employment with Peregrine and which are protectible by copyright are "works made for hire," as that term is defined in the United States Copyright Act. I understand and agree that the decision whether or not to commercialize or market any invention developed by me solely or jointly with others is within Peregrine's sole discretion and for Peregrine's sole benefit and that no royalty will be due to me as a result of Peregrine's efforts to commercialize or market any such invention.

c.Inventions Assigned to the United States. I agree to assign to the United States government all my right, title, and interest in and to any and all Inventions whenever such full title is required by a contract between Peregrine and the United States or any of its agencies.

d.Maintenance of Records. I agree to keep and maintain adequate and current written records of all Inventions made by me (solely or jointly with others) during the term of my employment with Peregrine. The records will be in the form of notes, sketches, drawings, and any other format that may be specified by Peregrine. The records will be available to and remain the sole property of Peregrine at all times. I agree to promptly return all records in my possession upon termination of my employment or when requested by the Peregrine.

e.Patent and Copyright Registrations. I agree to cooperate and assist Peregrine, or its designee, at Peregrine's expense, in every proper way to secure Peregrine's rights in the Inventions and any copyrights, patents or other intellectual property rights relating thereto in any and all countries, including the disclosure to Peregrine of all pertinent information and data with respect thereto, the execution of all applications, specifications, oaths, assignments and all other instruments which Peregrine shall deem necessary in order to apply for and obtain such rights and in order to assign and convey to Peregrine, its successors, assigns, and nominees the sole and exclusive rights, title and interest in and to such Inventions, and any copyrights, patents, mask work rights or other intellectual property rights relating thereto. I further agree that my obligation to execute or cause to be executed, when it is in my power to do so, any such instrument or papers shall continue after the termination of this Agreement. If Peregrine is unable because of my mental or physical incapacity or for any other reason to secure my signature to apply for or to pursue any application for any United States or foreign patents or copyright registrations covering Inventions or original works of authorship assigned to Peregrine as above, then I hereby irrevocably designate and appoint Peregrine and its duly authorized officers and agents as my agent and attorney in fact, to act for and in my behalf and stead to execute and file any such applications and to do all other lawfully permitted acts to further the prosecution and issuance of letters patent or copyright registrations thereon with the same legal force and effect as if executed by me.

f.Exception to Assignments. I understand that the provisions of this Agreement requiring assignment of Inventions to Peregrine do not apply to any invention which qualifies fully under the provisions of California Labor Code Section 2870 (attached hereto as Exhibit B). I will advise Peregrine promptly in writing of any inventions that I believe meet the criteria in California Labor Code Section 2870 and not otherwise disclosed on Exhibit A.

3.Conflicts of Interest. I agree that, during the term of my employment with Peregrine, I will not engage in any other employment, occupation, consulting or other business activity directly related to the business in which Peregrine is now involved or becomes involved during the term of my employment, nor will I engage in any other activities that conflicts with my obligations to Peregrine. I further agree to diligently adhere to the Conflict of Interest Guidelines set forth in Peregrine’s Personnel Policies Guide which I have received.

4.Documents. I agree that, at the time of leaving the employ of Peregrine, I will deliver to Peregrine (and will not keep in my possession, recreate or deliver to anyone else) any and all devices, records, data, notes, reports, proposals, lists, correspondence, specifications, drawings blueprints, diagrams, sketches, materials, equipment, other documents or property, or reproductions of any aforementioned items developed by me pursuant to my employment with Peregrine or otherwise belonging to Peregrine, its successors or assigns, including, without limitation, those records maintained pursuant to Paragraph 2(d) above.

5.Solicitation of Employees. I agree that for a period of twelve (12) months immediately following the termination of my relationship with Peregrine for any reason, whether with or without cause, I shall not either directly or indirectly solicit, induce, recruit or encourage any of Peregrine's employees to leave their employment, or take away such employees, or attempt to solicit, induce, recruit, encourage or take away employees of Peregrine, either for myself or for any other person or entity.

6.Notification of New Employer. Following termination of my employment with Peregrine, either by me or Peregrine, I hereby grant consent for Peregrine to notify my new employer about my rights and obligations under this Agreement.

7.Compensation for Services; Disclosure of Investments. I will disclose to Peregrine any material compensation received by me for services not rendered to or on behalf of Peregrine, including equity or equity-type payments, and consulting or advisory fees. I will also disclose to Peregrine any material investments made by me in any competitor or potential competitor of Peregrine excluding investments in publicly traded companies.

8.Injunctive Relief. I agree that it would be impossible or inadequate to measure and calculate Peregrine’s damages from my breach of the terms set forth above in Paragraphs 1, 2, 3, 4, and 5, and that time may be of the essence for Peregrine to seek relief. Accordingly, I agree that if I breach my obligations proscribed in Paragraphs 1, 2, 3, 4, and 5, Peregrine will have available, in addition to any other right or remedy available, the right to obtain an injunction from a court of competent jurisdiction restraining such breach or threatened breach of this Agreement.

9.Representations. I agree to execute any proper oath or verify any proper document required to carry out the terms of this Agreement. I represent that my performance of all the terms of this Agreement will not breach any agreement to keep in confidence proprietary information acquired by me in confidence or in trust prior to my employment by Peregrine. I have not entered into, and I agree I will not enter into, any oral or written agreement in conflict herewith.

10.At Will. I understand that nothing in this Agreement alters the nature of my at will employment with Peregrine, and either I or Peregrine may terminate my employment at any time, for any reason or for no reason, with or without notice.

11.Successors and Assigns. I understand that this Agreement will be binding upon my heirs, executors, administrators and other legal representatives and will be for the benefit of Peregrine, its successors, and its assigns.

12.Severability. I agree that if one or more of the provisions in this Agreement are deemed void by law, then the remaining provisions will continue in full force and effect.

I HAVE READ AND UNDERSTAND THIS AGREEMENT AND HEREBY VOLUNTARILY AGREE TO ITS TERMS.

Date: 1/7/13Carl N. Burrow     Employee Name (printed)

/s/ Carl N. Burrow

Employee Signature

Exhibit A

LIST OF PRIOR INVENTIONSAND ORIGINAL WORKS OF AUTHORSHIP

(To Be Completed and Returned By Employee)

TitleDateIdentifying Number or Brief Description

X No inventions or improvements

Additional Sheets Attached

1/7/13/s/ Carl N. Burrow

Date                            Employee Signature

Exhibit B

CALIFORNIA LABOR CODE SECTION 2870INVENTION ON OWN TIME - EXEMPTION FROM AGREEMENT

(a) Any provision in an employment agreement which provides that an employee shall assign, or offer to assign, any of his or her rights in an invention to his or her employer shall not apply to an invention that the employee developed entirely on his or her own time without using the employer's equipment, supplies, facilities, or trade secret information except for those inventions that either:

(1) Relate at the time of conception or reduction to practice of the invention to the employer's business, or actual or demonstrably anticipated research or development of the employer; or

(2) Result from any work performed by the employee for the employer.

(b) To the extent a provision in an employment agreement purports to require an employee to assign an invention otherwise excluded from being required to be assigned under subdivision (a), the provision is against the public policy of this state and is unenforceable.

Arbitration Agreement

Peregrine Semiconductor Corporation (“Peregrine”) and I each agree to submit to binding arbitration any and all disputes that we could otherwise pursue in court that arise from or relate to my employment, or the termination of my employment, with Peregrine. This includes, without limitation, any claim against Peregrine, its successors and assigns, or any of its employees or agents based on any state or federal statute (including claims for employment discrimination, retaliation or harassment, or based on the California Labor Code), as well as any common law claim (including claims for breach of contract or breach of the implied covenant of good faith and fair dealing, wrongful discharge, defamation, misrepresentation, fraud, and infliction of emotional distress), but excludes any claims for workers’ compensation, unemployment benefits, wage claims brought before an administrative agency, or any other claim that cannot legally be subject to a pre-dispute arbitration agreement under applicable law..

The arbitration shall be conducted by a single neutral arbitrator in accordance with the then-current American Arbitration Association (“AAA”) National Rules for the Resolution of Employment Disputes, which can be viewed at http://www.adr.org/sp.asp?id=32904. The arbitration shall take place in the San Diego County. Peregrine will pay the arbitrator’s fee, and will bear all other administrative charges by the AAA beyond those the employee would have otherwise had to pay if he or she filed a lawsuit in court. .

All parties shall be entitled to engage in reasonable pre-hearing discovery to obtain information to prosecute or defend the asserted claims. Any disputes between the parties regarding the nature or scope of discovery shall be decided by the arbitrator. The arbitrator shall hear and issue a written ruling upon any dispositive motions brought by either party, including but not limited to, demurrers, motions for summary judgment, motions for summary adjudication, or motions for terminating sanctions.

After the hearing, the arbitrator shall issue a written decision setting forth the award, if any, and explaining the basis therefore. The arbitrator shall have the power to award any type of relief that would be available in a court of competent jurisdiction. In addition, the arbitrator may order any party that presented any claim or defense without substantial justification to pay the other party’s attorneys’ fees and costs. The arbitrator’s award shall be final and binding upon the parties and may be entered as a judgment in any court of competent jurisdiction.

Notwithstanding the terms of this Agreement, nothing in this Agreement shall require either Peregrine or me to arbitrate any claim for injunctive relief arising from any alleged misappropriation of confidential information or trade secrets, or the alleged violation of any non-solicitation or non-competition obligation, if time is of the essence and damages would be an inadequate remedy.

We intend that this Agreement be limited to those claims that may legally be subject to a pre-dispute arbitration agreement under applicable law. A court construing this Agreement may therefore modify or interpret it to render it enforceable.

This is the entire agreement between us regarding the resolution of any disputes that might arise between us. Any other agreements on this subject are hereby waived and of no effect. Any modification to this Agreement must be in writing and signed by both of us.

We both understand and agree that we are entering into this Agreement voluntarily, and that this Agreement provides for the waiver of our respective rights to a trial by jury on the claims covered by this Agreement.

I HAVE READ, UNDERSTAND, AND AGREE TO THE FOREGOING.

Dated: 1/7/13Carl N. Burrow___________________

Employee Name

/s/ Carl N. Burrow________________

Employee Signature

Dated: ____________________ /s/ Jay Biskupski__________________

Peregrine Semiconductor Corporation

EX-23.1

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the Registration Statement (Form S-8 No. 333-183459) pertaining to the 2012 Equity Incentive Plan, 2004 Stock Plan, 1996 Stock Plan, and 2012 Employee Stock Purchase Plan of Peregrine Semiconductor Corporation of our report dated February 19, 2014, with respect to the consolidated financial statements of Peregrine Semiconductor Corporation included in this Annual Report (Form 10-K) for the year ended December 28, 2013.

/s/ Ernst & Young LLP

San Diego, California

February 19, 2014

EX-31.1

Exhibit 31.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, James S. Cable, certify that:

1. I have reviewed this Annual Report on Form 10-K of Peregrine Semiconductor 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 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. 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

c. 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 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: February 19, 2014

/s/ James S. Cable

Chief Executive Officer, President, and Chairman

(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER

PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Jay Biskupski, certify that:

1. I have reviewed this Annual Report on Form 10-K of Peregrine Semiconductor 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 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. 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

c. 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 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: February 19, 2014

/s/ Jay Biskupski

Chief Financial Officer

(Principal Financial and Accounting 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 Peregrine Semiconductor Corporation (the “Company”) on Form 10-K for the year ended December 28, 2013 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, James S. Cable, Chief Executive Officer, President, and Chairman of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; 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: February 19, 2014

/s/ James S. Cable

Chief Executive Officer, President, and Chairman

The foregoing certification is being furnished solely pursuant to 18 U.S.C. Section 1350 and is not being filed as part of the Report or as a separate disclosure document.

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 Peregrine Semiconductor Corporation (the “Company”) on Form 10-K for the year ended December 28, 2013, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Jay Biskupski, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; 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: February 19, 2014

/s/ Jay Biskupski

Chief Financial Officer

The foregoing certification is being furnished solely pursuant to 18 U.S.C. Section 1350 and is not being filed as part of the Report or as a separate disclosure document.

XML

Stockholders' Equity - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	1 Months Ended	12 Months Ended			1 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended		1 Months Ended
	Aug. 31, 2012	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	May 31, 2012 Series D1 convertible preferred stock	Dec. 29, 2012 Series D1 convertible preferred stock	Dec. 28, 2013 2004 Plan	Apr. 30, 2012 2012 ESPP	Dec. 28, 2013 Warrant Interest Expense	Dec. 31, 2011 Warrant Interest Expense	May 31, 2012 Warrant Series D1 convertible preferred stock
Class of Stock [Line Items]
Convertible preferred stock outstanding converted into common stock	22,412,000
Warrants exercised in period											80,000
Preferred stock issued upon exercise of warrants in period						(8,912,000)					19,000
Included in convertible preferred stock			$ (1,285)		$ 477
Changes in warrant liability recorded in interest expense									(634)	36
Authorized for issuance							6,495,000	1,000,000
Options vesting period, maximum							4 years
Options, expiration term							10 years
Annual vesting percentage							25.00%
Percentage of eligible compensation for purchase common stock at discount								15.00%
Purchase price of shares, lower rate								85.00%
Total intrinsic value of stock options exercised		6,926	5,491	757
Stock options, unrecognized stock-based compensation		$ 13,108
Stock options, weighted-average recognition period of unrecognized stock-based compensation		2 years 1 month 6 days

XML

Employee Benefits (Details)	12 Months Ended
	Dec. 28, 2013
Postemployment Benefits [Abstract]
Minimum age of employee for defined contribution plan	21 years

XML

Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Income Tax [Line Items]
Federal net operating loss carryforwards	$ 147,545
State net operating loss carryforwards	102,481
Net Operating Loss Carry Forwards Expire Period	The federal net loss carryforwards will expire between 2018 and 2031, unless previously utilized. The state net loss carryforwards will expire between 2014 and 2031, unless previously utilized
Excess tax benefits	1,654
Tax credit carryforwards expire period	The federal credits will begin to expire in 2024. The state research and development tax credit does not expire.
Net operating loss carryforwards change in ownership minimum	50.00%
Net operating loss carryforwards testing period	3 years
Undistributed Earnings of Foreign Subsidiaries	237
Unrecognized tax benefits that would not impact effective tax rate		68	261
Reversal of accrued interest, impact on effective tax rate		12
Amount of interest and penalities recognized	12	85	20
Undistributed earnings of foreign subsidiaries which taxes were recorded	774	900
Federal
Income Tax [Line Items]
Tax credit carryforwards	7,226
State
Income Tax [Line Items]
Tax credit carryforwards	$ 9,934

XML

Concentrations and Geographic Information - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012
Risks and Uncertainties [Abstract]
Allowance for doubtful accounts	$ 100	$ 100
Percentage of raw material supplied by vendors	95.00%	98.00%

XML

Reconciliation of Federal Statutory Rate to Effective Rate (Detail)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Income tax provision (benefit) on earnings at federal statutory rate	(35.00%)	35.00%	(35.00%)
State tax provision (benefit), net of federal benefit	0.90%	3.20%	(2.30%)
Federal and state tax credits	(74.60%)	(8.10%)	(15.80%)
Change in valuation allowance	116.20%	(47.90%)	55.20%
Stock-based compensation	(7.90%)	4.10%	4.20%
Valuation of warrants	0.00%	3.10%	(0.10%)
Deemed repatriation of foreign earnings	0.00%	3.60%	0.00%
Nondeductible expenses and other permanent differences, net	2.10%	5.80%	(4.10%)
Income tax provision (benefit)	1.70%	(1.20%)	2.10%

XML

Certain Financial Statement Information - Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Raw materials	$ 22,265	$ 20,986
Work in progress	22,100	15,494
Finished goods	9,124	20,537
Net inventories	$ 53,489	$ 57,017

XML

Customers Whose Balance Represented Greater Than 10% of Accounts Receivable (Detail)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012
Macnica
Concentration Risk [Line Items]
Percentage of accounts receivable	50.00%	43.00%
Richardson
Concentration Risk [Line Items]
Percentage of accounts receivable		14.00%

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Stockholders' Equity (Tables)

12 Months Ended

Dec. 28, 2013

Equity [Abstract]

Fair Value of Stock Options

The Company uses the Black-Scholes valuation model to calculate the fair value of stock options. The fair value of stock options was estimated at the grant date using the following weighted-average assumptions:

	Years Ended
	December 28, 2013			December 29, 2012			December 31, 2011
Expected term (years)	5.00			5.00			5.24
Risk-free interest rate	0.80		%	0.72		%	1.26		%
Dividend rate	—			—			—
Volatility	61		%	62		%	61		%
Forfeiture rate	3		%	3		%	3		%
Estimated fair value per stock option	$	5.26		$	8.37		$	4.47

Summary of Activity Related to Company's Stock Options

The following summarizes activity related to the Company’s stock options under the 2004 Plan and 2012 Plan at December 28, 2013:

	Options Outstanding		Weighted-Average Exercise  Price		Aggregate Intrinsic  Value		Weighted-Average Remaining Contractual  Term (Years)
Outstanding at December 25, 2010	6,135		$	2.86	$	37,360	7.04
Granted	1,349		9.69
Exercised	(105	)	1.84
Forfeited	(139	)	5.94
Outstanding at December 31, 2011	7,240		$	4.11	$	34,493	6.68
Granted	903		15.98
Exercised	(432	)	1.07
Forfeited	(109	)	8.49
Outstanding at December 29, 2012	7,602		$	5.61	$	69,449	6.35
Granted	1,862		10.27
Exercised	(857	)	2.13
Forfeited	(380	)	12.52
Outstanding at December 28, 2013	8,227		$	6.71	$	19,870	6.27
Vested and expected to vest at December 28, 2013	8,076		$	6.63	$	19,870	6.22
Exercisable at December 28, 2013	5,023		$	4.15	$	19,805	4.76

Stock-Based Compensation Expense Recognized

Total stock-based compensation expense recognized during the years ended December 28, 2013, December 29, 2012, and December 31, 2011 was comprised of the following:

	Years Ended
	December 28, 2013		December 29, 2012		December 31, 2011
Cost of net revenue	$	883	$	588	$	431
Research and development	2,097		1,419		762
Selling, general and administrative	3,635		2,430		1,891
	$	6,615	$	4,437	$	3,084

Common Stock Reserved for Future Issuance

The following common stock is reserved for future issuance at December 28, 2013 and December 29, 2012:

	December 28, 2013	December 29, 2012
Common stock warrants	2	2
Stock awards issued and outstanding	8,227	7,602
Authorized for grants under the 2012 Plan and 2012 ESPP	3,787	3,996
	12,016	11,600

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Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended			12 Months Ended
	Dec. 28, 2013 claim	Dec. 29, 2012	May 31, 2013 Accounts Receivable Financing	Dec. 28, 2013 Office Space	Dec. 29, 2012 Office Space	Dec. 31, 2011 Office Space	Dec. 28, 2013 LIBOR	Dec. 28, 2013 LIBOR Minimum	Dec. 28, 2013 LIBOR Maximum
Debt and Capital Lease Obligations [Line Items]
Operating lease future minimum annual payments for 2014	$ 2,428,000			$ 898,000
Operating lease future minimum annual payments for 2015	1,366,000			953,000
Operating lease and license expense				4,045,000	3,606,000	3,154,000
Maximum line of credit availability			25,000,000
Description of variable rate basis							LIBOR
Interest rate basis spread								2.00%	2.50%
Maturity date	Dec. 31, 2015
Line of credit available	19,178,000	14,414,000
Loss Contingency, Monetary Penalty Per Violation, Maximum	500
Loss Contingency, New Claims Filed, Number	0
Loss Contingency Accrual	0
Inventory purchase commitments	$ 12,345,000

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Stock-Based Compensation Expense Recognized (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 6,615	$ 4,437	$ 3,084
Cost of net revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	883	588	431
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	2,097	1,419	762
Selling, general and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 3,635	$ 2,430	$ 1,891

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Cash and Marketable Securities' Cost, Unrealized Gains, Unrealized Losses and Fair Value by Significant Investment (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	$ 63,172	$ 93,354
Unrealized Gains	17	14
Unrealized Losses	(17)	(9)
Fair Value	63,172	93,359
Cash and Cash Equivalents	16,249	44,106	12,119	15,226
Short-term marketable securities	28,035	30,361
Long-term marketable securities	18,888	18,892
Cash
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	7,023	24,703
Fair Value	7,023	24,703
Cash and Cash Equivalents	7,023	24,703
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	9,226	18,923
Fair Value	9,226	18,923
Cash and Cash Equivalents	9,226	18,923
Level 1 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	9,226	18,923
Fair Value	9,226	18,923
Cash and Cash Equivalents	9,226	18,923
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	46,923	49,728
Unrealized Gains	17	14
Unrealized Losses	(17)	(9)
Fair Value	46,923	49,733
Cash and Cash Equivalents	0	480
Short-term marketable securities	28,035	30,361
Long-term marketable securities	18,888	18,892
Level 2 | U.S. Agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	22,929	24,339
Unrealized Gains	4	2
Unrealized Losses	(3)	(2)
Fair Value	22,930	24,339
Short-term marketable securities	15,929	13,317
Long-term marketable securities	7,001	11,022
Level 2 | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	8,840	9,285
Unrealized Gains	4	2
Unrealized Losses	(10)	(3)
Fair Value	8,834	9,284
Cash and Cash Equivalents	0	480
Short-term marketable securities	5,959	6,642
Long-term marketable securities	2,875	2,162
Level 2 | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	998	2,893
Unrealized Gains	0	1
Unrealized Losses	(1)	0
Fair Value	997	2,894
Short-term marketable securities	997	2,894
Level 2 | Corporate notes and bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost	14,156	13,211
Unrealized Gains	9	9
Unrealized Losses	(3)	(4)
Fair Value	14,162	13,216
Short-term marketable securities	5,150	7,508
Long-term marketable securities	$ 9,012	$ 5,708

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Supply and Prepayment Agreement (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		5 Months Ended	12 Months Ended
	Mar. 30, 2013	Sep. 29, 2012	Jul. 31, 2012	Dec. 28, 2013	Dec. 29, 2012
Payables and Accruals [Abstract]
Initial term of agreement	18 months
Proceeds to be paid		$ 13,000	$ 14,000
Deposits repaid under supply and prepayment agreement				12,084
Customer deposits				916
Balance received as prepayments on purchase orders from Macnica					11,425
Deposits paid to suppliers for support production levels					4,000
Deposit repayments from suppliers				3,755
Remaining deposit to be collected				$ 245

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Components of Company's Deferred Tax Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Deferred tax assets:
Net operating loss carryforwards	$ 55,010	$ 55,758
Research tax credit carryforwards	10,177	7,232
Accrued expenses and reserves	9,559	6,378
Foreign deferred tax assets	0	12
Total deferred tax assets	74,746	69,380
Deferred tax liabilities:
Depreciation	(3,669)	(2,918)
Foreign deferred tax liabilities	(32)	0
Total deferred tax liabilities	(3,701)	(2,918)
Less valuation allowance	(71,077)	(66,450)
Net deferred tax asset	$ (32)	$ 12

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Net Income (Loss) per Share

12 Months Ended

Dec. 28, 2013

Earnings Per Share [Abstract]

Net Income (Loss) per Share

Net Income (Loss) per Share

Basic net income per share is calculated by dividing net income attributable to common shareholders by the weighted-average number of common shares outstanding for the period. Diluted net income per share is calculated on the basis of the weighted-average number of shares of common stock including the effect of potential dilution that could occur if securities to issue common stock were exercised or converted into common stock. The Company calculates diluted net income (loss) per share under the as-if-converted method unless the conversion of the preferred stock is anti-dilutive to basic net income (loss) per share. To the extent preferred stock is anti-dilutive, the Company calculates diluted net income (loss) per share under the two-class method.

	Years Ended
	December 28, 2013			December 29, 2012			December 31, 2011
Numerator:
Net income (loss)	$	(4,051	)	$	7,272		$	(9,682	)
Net income allocable to preferred stockholders	—			(4,515		)	—
Net income (loss) attributable to common stockholders	$	(4,051	)	$	2,757		$	(9,682	)
Denominator:
Weighted average common shares outstanding	32,296			14,303			2,737
Less: weighted average unvested shares of common stock subject to repurchase	(2		)	(12		)	(22		)
Weighted average common shares used in computing basic net income (loss) per share	32,294			14,291			2,715
Weighted average effect of potentially dilutive securities:
Stock options	—			4,359			—
Common stock warrants	—			1			—
Weighted average common shares used in computing diluted net income (loss) per share	32,294			18,651			2,715
Net income (loss) per share attributable to common stockholders:
Basic	$	(0.13	)	$	0.19		$	(3.57	)
Diluted	$	(0.13	)	$	0.15		$	(3.57	)
Historical outstanding anti-dilutive securities not included in diluted net income (loss) per share calculation:
Common stock options	8,227			1,030			7,240
Common stock warrants	1			—			72
Preferred stock (as converted)	—			—			22,365
Preferred stock warrants	—			—			205
	8,228			1,030			29,882

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Stock Reserved for Future Issuance (Detail) In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Equity [Abstract]
Common stock warrants	2	2
Stock awards issued and outstanding	8,227	7,602
Authorized for grants under the 2004 Plan, 2012 Plan, and 2012 ESPP	3,787	3,996
Stock reserved for future issuance	12,016	11,600

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Concentrations and Geographic Information (Tables)

12 Months Ended

Dec. 28, 2013

Risks and Uncertainties [Abstract]

Customers that Exceeded 10% of Total Net Revenue

Customers that exceeded 10% of total net revenue were as follows:

	Years Ended
	December 28, 2013		December 29, 2012		December 25, 2010
Macnica	69	%	72	%	48	%
Richardson	11	%	11	%	16	%

Customers Whose Balance Represented Greater than 10% of Accounts Receivable

Customers whose balance represented greater than 10% of accounts receivable were as follows:

	December 28, 2013		December 29, 2012
Macnica	50	%	43	%
Richardson	*		14	%

*     Less than 10% of accounts receivable for the respective period end

Net Revenue by Geographic Region

Net revenue is allocated to the geographic region where the customer, or its business unit that makes the purchase is geographically based, or where the services were provided. Net revenue by geographic region was as follows:

	Years Ended
	December 28, 2013				December 29, 2012				December 31, 2011
United States	$	35,089	17	%	$	34,489	17	%	$	31,921	30	%
Japan	142,389		71		147,458		72		52,062		48
All others	24,838		12		21,961		11		23,788		22
	$	202,316	100	%	$	203,908	100	%	$	107,771	100	%

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Restructuring (Tables)

12 Months Ended

Dec. 28, 2013

Restructuring and Related Activities [Abstract]

Restructuring and Related Costs

The following table summarizes the restructuring activity and related accrual at December 28, 2013:

	Balance at December 29, 2012		Current Charges		Cash Payments			Balance at December 28, 2013
Employee termination benefits	$	—	$	636	$	(218	)	$	418
Lease and other contract termination costs	—		73		(35		)	38
Total	$	—	$	709	$	(253	)	$	456

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Customers that Exceeded 10% of Total Net Revenue (Detail)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Macnica
Revenue [Line Items]
Net revenue, contribution by customers	69.00%	72.00%	48.00%
Richardson
Revenue [Line Items]
Net revenue, contribution by customers	11.00%	11.00%	16.00%

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Income (Loss) Before Income Tax (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Income Tax [Line Items]
Income (loss) before income taxes	$ (3,984)	$ 7,184	$ (9,486)
Domestic Tax Authority
Income Tax [Line Items]
Income (loss) before income taxes	(4,404)	6,946	(9,849)
Foreign Tax Authority
Income Tax [Line Items]
Income (loss) before income taxes	$ 420	$ 238	$ 363

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Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 28, 2013

Quarterly Financial Information Disclosure [Abstract]

Unaudited Quarterly Financial Data

Our quarterly results of operations for these periods are not necessarily indicative of future results of operations.

	Net Revenue		Gross Profit		Net Income (Loss)			Diluted  Net Income (Loss) Per Share *
Year Ended December 28, 2013
Fourth Quarter	$	43,324	$	15,607	$	(6,828	)	$	(0.21	)
Third Quarter	60,002		25,253		4,433			0.12
Second Quarter	52,365		20,719		(448		)	(0.01		)
First Quarter	46,625		19,817		(1,208		)	(0.04		)
Total	$	202,316	$	81,396	$	(4,051	)
Year Ended December 29, 2012
Fourth Quarter	$	62,999	$	27,282	$	5,627		$	0.15
Third Quarter	60,575		25,015		4,713			0.10
Second Quarter	43,639		16,241		(26		)	(0.01		)
First Quarter	36,695		11,235		(3,042		)	(1.10		)
Total	$	203,908	$	79,773	$	7,272

*    The sum of the four quarters may not agree to the year total due to rounding within a quarter or the inclusion or exclusion of common stock equivalents in certain periods.

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Organization and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Aug. 31, 2012
Accounting Policies [Abstract]
Deferred offering costs				$ 4,494
Advertising expense	$ 440	$ 288	$ 185

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Organization and Summary of Significant Accounting Policies

12 Months Ended

Dec. 28, 2013

Accounting Policies [Abstract]

Organization and Summary of Significant Accounting Policies

Organization and Summary of Significant Accounting Policies

The Company

Peregrine Semiconductor Corporation (the Company) is a fabless provider of high performance radio frequency integrated circuits (RFICs). The Company’s solutions leverage its proprietary UltraCMOS technology which enables the design, manufacture, and integration of multiple RF, mixed signal, and digital functions on a single chip. The Company’s

solutions target a broad range of applications in the space and military, automotive, broadband, industrial, mobile device, test and measurement equipment, and wireless infrastructure markets.

Principles of Consolidation

The consolidated financial statements include the accounts of the Company and its subsidiaries. All significant intercompany transactions have been eliminated upon consolidation.

Accounting Periods

The Company uses a 52- or 53-week fiscal year ending on the last Saturday in December. Fiscal years 2013 and 2012 were 52-week years ending on December 28, 2013 and December 29, 2012, respectively. Fiscal year 2011 was a 53-week year ending on December 31, 2011.

Use of Estimates

The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amount of assets and liabilities at the date of the financial statements as well as the reported amounts of net revenue and expense during the reporting period. The Company regularly evaluates estimates and assumptions related to areas such as revenue recognition, allowances for doubtful accounts, warranty obligations, inventory valuation, stock-based compensation expense, deferred income tax valuation allowances, litigation and other loss contingencies. These estimates and assumptions are based on current facts, historical experience and various other factors believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities and the recording of revenue, costs and expenses that are not readily apparent from other sources. Actual results may differ materially and adversely from these estimates. To the extent there are material differences between the estimates and actual results, the Company’s future results of operations will be affected.

Concentration of Credit Risk

Financial assets and liabilities, which potentially subject the Company to concentrations of credit risk, consist primarily of cash equivalents, marketable securities, and accounts receivable. The Company limits its exposure to credit loss by placing its cash in high credit quality financial investments. At times, such deposits may be in excess of insured limits. The Company has not experienced any significant losses on its investments.

Deferred Initial Public Offering Costs

Deferred IPO costs, consisting of direct legal, accounting, and other fees and costs, were capitalized and included in other assets on the Company’s consolidated balance sheet for the periods presented prior to August 2012. Upon closing of the Company’s IPO, the aggregate deferred offering costs of $4,494 were reclassified to stockholders’ equity.

Fair Value of Financial Instruments

The Company applies fair value accounting for all financial assets and liabilities that are recognized or disclosed at fair value in the financial statements on a recurring basis. The Company’s financial instruments consist principally of cash and cash equivalents and marketable securities. The fair value of a financial instrument is the amount that would be received in an asset sale or paid to transfer a liability in an orderly transaction between unaffiliated market participants. Assets and liabilities measured at fair value are categorized based on whether or not the inputs are observable in the market and the degree that the inputs are observable. The categorization of financial instruments within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The hierarchy is prioritized into three levels (with Level 3 being the lowest) defined as follows:

Level 1: Inputs are based on quoted market prices for identical assets or liabilities in active markets at the measurement date.

Level 2: Inputs include quoted prices for similar assets or liabilities in active markets and/or quoted prices for identical or similar assets or liabilities in markets that are not active near the measurement date.

Level 3: Inputs include management’s best estimate of what market participants would use in pricing the asset or liability at the measurement date. The inputs are unobservable in the market and significant to the instrument’s valuation.

The fair value of the Company’s cash equivalents was determined based on “Level 1” inputs. The fair value of marketable securities was determined based on “Level 2” inputs. The fair value of the Company’s “Level 2” instruments were valued based on the market approach technique which uses quoted market prices or model driven valuations using significant inputs derived from or corroborated by observable market data. The Company does not have any marketable securities in the “Level 3” category. The Company believes that the recorded values of all of the other financial assets and liabilities approximate their current fair values because of maturity and respective duration of these assets and liabilities.

Cash, Cash Equivalents and Marketable Securities

The Company considers all highly liquid investments that are readily convertible into cash and have a maturity of three months or less at the time of purchase to be cash equivalents. The cost of these investments approximates their fair value. The Company maintains an investment portfolio of various security holdings, types and maturities. The Company defines marketable securities as income yielding securities that can be readily converted into cash. Marketable securities’ short-term and long-term classifications are based on remaining maturities at each reporting period. The Company’s marketable securities include U.S. agency securities, certificates of deposit, commercial paper, and corporate notes and bonds. The Company places its cash investments in instruments that meet various parameters, including credit quality standards as specified in the Company’s investment policy.

The Company accounts for marketable securities as available-for-sale. Management determines the appropriate classification of such securities at the time of purchase and re-evaluates such classification as of each balance sheet date. Cash equivalents and marketable securities are reported at fair value with the related unrealized gains and losses included in accumulated other comprehensive income (loss), a component of shareholders’ equity, net of tax. The Company assesses whether its investments with unrealized loss positions are other than temporarily impaired. Unrealized gains and losses and declines in value judged to be other than temporary, if any, are determined based on the specific identification method and are reported in other income, net in the consolidated statements of operations.

Inventories

Inventories are stated at the lower of cost (first-in, first-out) or market. Inventory reserves or lower of cost or market allowances are established on a part specific basis for estimated obsolescence or unmarketable inventory equal to the difference between the cost of inventory and the estimated realizable value based upon assumptions about future demand and market conditions and reduce the carrying value of the related inventory. Such reductions establish a new cost basis for the specific parts. Shipping and handling costs are classified as a component of cost of net revenue in the consolidated statements of operations.

The Company continually assesses the recoverability of its inventory based on assumptions about demand and market conditions. Forecasted demand is determined based on historical sales and expected future sales. Determination of the market value may be complex, and therefore requires management to make assumptions and to apply judgment. In order for management to make the appropriate determination of market value, the following items are commonly considered: inventory turnover statistics, inventory quantities, unfilled customer order quantities, forecasted customer demand, competitive pricing, seasonality factors, consumer trends, and performance of similar products or accessories. Subsequent changes in facts or circumstances do not result in the reversal of previously recorded reserves. If actual market conditions are less favorable than those projected by management, additional inventory write-downs may be required that may adversely affect the Company’s operating results. If actual market conditions are more favorable, the Company may have higher gross profits when products are sold.

Property and Equipment

Property and equipment is carried at cost and is depreciated using the straight-line method over the useful lives of the assets ranging from three to seven years. Leasehold improvements are amortized over the estimated life of the asset or term of the lease, whichever is shorter.

Impairment of Long-Lived Assets

The Company regularly reviews the carrying amount of its long-lived assets, as well as their useful lives, to determine whether indicators of impairment may exist which warrant adjustments to carrying values or estimated useful lives. An impairment loss would be recognized when the sum of the expected future undiscounted net cash flows is less than the carrying amount of the asset. Should impairment exist, the impairment loss would be measured based on the excess of the carrying amount of the asset over the asset’s fair value. The Company has not recognized any impairment losses through December 28, 2013.

Research and Development

Research and development costs are expensed as incurred.

Advertising Expense

The cost of advertising is expensed as incurred. The Company recognized advertising expense of $440, $288, and $185 for the years ended December 28, 2013, December 29, 2012, and December 31, 2011, respectively.

Revenue Recognition

The Company recognizes revenue when each of the following have occurred: (1) there is persuasive evidence that an arrangement with the customer exists, which is generally a customer purchase order; (2) the products are delivered, which generally occurs when the products are shipped and title and risk of loss has been transferred to the customer; (3) the selling price is fixed or determinable; and (4) collection of the customer receivable is deemed reasonably assured.

The Company records revenue based on facts available at the time of sale. Amounts that are not probable of collection once the product has shipped and title has transferred to the customer are deferred until the amount that is probable of collection can be determined. Items that are considered when determining the amounts that will be ultimately collected are the customer’s overall creditworthiness and payment history.

For distributors with rights of return, revenue is not recognized until product is shipped to the end customer of the distributor and the amount that will ultimately be collected is determinable. The Company offers its distributors limited stock rotation, price protection, and in some situations, credits on pricing depending on their end customer (ship and debit credits). For these distributors revenue is not recognized until product is shipped to the end customer of the distributor and the amount that will ultimately be collected is determinable. On shipments where net revenue is not recognized, the Company records an accounts receivable and deferred revenue for the selling price as there is a legally enforceable right to payment. Inventory at distributors remains on the Company’s books at carrying value until sold by the distributor at which time the Company recognizes the net revenue and cost of net revenue. Revenues to these distributors are recorded net of any pricing adjustments for price protection or ship and debit credits in the same period as the sale of goods to their customers. The amount of any pricing adjustment is based on the difference between the price at which the distributor originally purchased the Company’s inventory and either: (1) a lower distribution price then being offered on those products for price protection; or (2) a special price offered to the distributor in order to meet competitive pressures in the marketplace for ship and debit credits. The Company does not currently offer rebates or other pricing incentives, except for volume purchase pricing at the time of sale, to direct customers or distributors.

The Company also maintains an allowance for doubtful accounts for estimated losses resulting from the inability of customers to make required payments. If the financial condition of any customer were to deteriorate, resulting in an impairment of its ability to make payments, additional allowances could be required.

Warranty Accrual

The Company generally provides a product warranty for a period of one year; however, it may be longer for certain customers. Accordingly, the Company establishes provisions for estimated product warranty costs at the time net revenue is recognized based upon historical activity and, additionally, for any known product warranty issues. Warranty provisions are recorded as a cost of net revenue. The determination of such provisions requires the Company to make estimates of product return rates and expected costs to replace or rework the products under warranty. When the actual product failure rates, cost of replacements and rework costs differ from the original estimates, revisions to the estimated warranty accrual are made. Actual claims are charged against the warranty reserve.

Stock-Based Compensation

The Company has stock incentive plans under which options to purchase common stock have been granted to employees, consultants and directors. The stock options have been granted to employees with exercise prices equal to or above the fair value of the underlying stock, as determined by the board of directors on the date the equity award was granted up until the Company’s initial public offering in August 2012. The board of directors determined the value of the underlying stock by considering a number of factors, including historical and projected financial results, the risks the Company faced at the time, the preferences of the Company’s preferred stock, and the lack of liquidity of the Company’s common stock. The fair value of equity instruments expected to vest are recognized and amortized on a straight-line basis over the requisite service period of the award, which is generally four years.

Foreign Currency Translation

Functional currency of our international subsidiaries is the local currency. Resulting translation gains or losses are recognized as a component of other comprehensive income (loss). Transaction gains or losses related to balances denominated in a different currency than the functional currency are recognized in the statement of operations.

Other Income (Expense), net

Other income (expense), net consists primarily of foreign currency exchange gains and losses.

Comprehensive Income (Loss)

Comprehensive income (loss) is defined as the change in equity during a period from transactions and other events and circumstances from non-owner sources. Net income (loss) and other comprehensive income (loss), consist of foreign currency translation adjustments and unrealized gains and losses on investments, are reported, net of their related tax effect, to arrive at comprehensive income (loss).

Income Taxes

The Company accounts for income taxes using the asset and liability approach, the objective of which is to establish deferred tax assets and liabilities for the temporary differences between the financial reporting basis and the tax basis of our assets and liabilities, as measured by applying currently enacted tax laws. A valuation allowance is established for deferred tax assets if, based on the weight of available evidence, it is more likely than not that some portion or all of the deferred tax assets will not be realized. Future realization of the deferred tax asset is dependent on the reversal of existing taxable temporary differences, carryback potential, tax-planning strategies and on us generating sufficient taxable income in future years as the deferred income tax charges become currently deductible for tax reporting purposes. For the years ended December 28, 2013, December 29, 2012, and December 31, 2011, the Company has recorded a full valuation allowance against its domestic net deferred tax assets due to uncertainty of future realization.

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Net Income (Loss) per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Numerator:
Net income (loss)	$ (6,828)	$ 4,433	$ (448)	$ (1,208)	$ 5,627	$ 4,713	$ (26)	$ (3,042)	$ (4,051)	$ 7,272	$ (9,682)
Net income allocable to preferred stockholders									0	(4,515)	0
Net income (loss) attributable to common stockholders									$ (4,051)	$ 2,757	$ (9,682)
Denominator:
Weighted average common shares outstanding									32,296	14,303	2,737
Less: weighted average unvested shares of common stock subject to repurchase									(2)	(12)	(22)
Weighted average common shares used in computing basic net income (loss) per share									32,294	14,291	2,715
Weighted average effect of potentially dilutive securities:
Stock options									0	4,359	0
Common stock warrants									0	1	0
Weighted average common shares used in computing diluted net income (loss) per share									32,294	18,651	2,715
Net income (loss) per share attributable to common stockholders:
Basic, in dollars per share									$ (0.13)	$ 0.19	$ (3.57)
Diluted, in dollars per share	$ (0.21)	$ 0.12	$ (0.01)	$ (0.04)	$ 0.15	$ 0.10	$ (0.01)	$ (1.10)	$ (0.13)	$ 0.15	$ (3.57)
Historical outstanding anti-dilutive securities not included in diluted net income (loss) per share calculation:
Anti-dilutive securities not included in diluted net income (loss) per share calculation									8,228	1,030	29,882
Common stock options
Historical outstanding anti-dilutive securities not included in diluted net income (loss) per share calculation:
Anti-dilutive securities not included in diluted net income (loss) per share calculation									8,227	1,030	7,240
Common stock warrants
Historical outstanding anti-dilutive securities not included in diluted net income (loss) per share calculation:
Anti-dilutive securities not included in diluted net income (loss) per share calculation									1	0	72
Preferred stock (as converted)
Historical outstanding anti-dilutive securities not included in diluted net income (loss) per share calculation:
Anti-dilutive securities not included in diluted net income (loss) per share calculation									0	0	22,365
Preferred stock warrants
Historical outstanding anti-dilutive securities not included in diluted net income (loss) per share calculation:
Anti-dilutive securities not included in diluted net income (loss) per share calculation									0	0	205

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Fair Value of Stock Options Estimated at Grant Date (Detail) (USD $)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Equity [Abstract]
Weighted-average expected term (years)	5 years	5 years	5 years 2 months 27 days
Risk-free interest rate	0.80%	0.72%	1.26%
Dividend rate	0.00%	0.00%	0.00%
Volatility	61.00%	62.00%	61.00%
Forfeiture rate	3.00%	3.00%	3.00%
Estimated weighted-average fair value per stock option	$ 5.26	$ 8.37	$ 4.47

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Restructuring (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended					0 Months Ended
	Dec. 28, 2013	Dec. 28, 2013 Cost of net revenue	Dec. 28, 2013 Selling, general and administrative	Dec. 28, 2013 Employee termination benefits	Dec. 28, 2013 Lease and other contract termination costs	Jan. 30, 2014 Minimum Subsequent Event [Member]	Jan. 30, 2014 Maximum Subsequent Event [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 0			$ 0	$ 0
Current Charges	709	340	369	636	73
Cash Payments	(253)			(218)	(35)
Restructuring reserve, ending balance	456			418	38
Expected total charges resulting from restructuring plan						$ 1,500	$ 2,000

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Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Current assets:
Cash and cash equivalents	$ 16,249	$ 44,106
Short-term marketable securities	28,035	30,361
Accounts receivable, net	16,905	13,353
Inventories	53,489	57,017
Prepaids and other current assets	4,085	11,108
Total current assets	118,763	155,945
Property and equipment, net	23,122	22,871
Long-term marketable securities	18,888	18,892
Other assets	102	210
Total assets	160,875	197,918
Current liabilities:
Accounts payable	12,983	22,306
Accrued liabilities	11,829	12,672
Accrued compensation	4,542	5,726
Customer deposits	916	24,425
Deferred revenue	6,131	12,755
Current portion of obligations under capital leases	0	11
Total current liabilities	36,401	77,895
Obligations under capital leases, less current portion	0	18
Other long-term liabilities	943	886
Commitments and contingencies
Stockholders' equity (deficit):
Preferred stock, $.001 par value, 5,000 shares authorized at December 28, 2013 and December 29, 2012; no shares issued and outstanding at December 28, 2013 and December 29, 2012
Common stock, $.001 par value, 100,000 shares authorized at December 28, 2013 and December 29, 2012; 32,712 and 31,855 shares issued and outstanding at December 28, 2013 and December 29, 2012, respectively	33	32
Additional paid-in capital	348,684	340,221
Accumulated deficit	(224,986)	(220,935)
Accumulated other comprehensive loss	(200)	(199)
Total stockholders’ equity	123,531	119,119
Total liabilities and stockholders’ equity	$ 160,875	$ 197,918

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Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Current (benefit) provision:
Federal	$ (81)	$ (300)	$ 20
State	(32)	49	0
Foreign	137	141	175
Total current	24	(110)	195
Deferred (benefit) provision:
Federal	0	0	0
State	0	0	0
Foreign	43	22	1
Total deferred	43	22	1
Total income tax provision (benefit)	$ 67	$ (88)	$ 196

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Consolidated Statements Of Stockholders' Equity (Deficit) (USD $) In Thousands, unless otherwise specified	Total	Series A1 convertible preferred stock	Series B1 convertible preferred stock	Series C1 convertible preferred stock	Series D1 convertible preferred stock	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 25, 2010	$ (136,172)	$ 31,837	$ 11,298	$ 35,469	$ 93,826	$ 3	$ 82,554	$ (218,525)	$ (204)
Beginning Balance (in shares) at Dec. 25, 2010		5,763	1,629	6,108	8,865	2,674
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options, net of repurchase liability and including vesting of early exercises (in shares)						102
Exercise of stock options, net of repurchase liability and including vesting of early exercises	190					0	190
Stock-based compensation expense	3,084						3,084
Net income (loss)	(9,682)						0	(9,682)
Other comprehensive income (loss)	(20)								(20)
Ending Balance at Dec. 31, 2011	(142,600)	31,837	11,298	35,469	93,826	3	85,828	(228,207)	(224)
Ending Balance (in shares) at Dec. 31, 2011		5,763	1,629	6,108	8,865	2,776
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options, net of repurchase liability and including vesting of early exercises (in shares)						430
Exercise of stock options, net of repurchase liability and including vesting of early exercises	458					1	457
Stock-based compensation expense	4,437						4,437
Net settlement of Series D1 preferred stock warrants (in shares)	47
Net settlement of Series C1 preferred stock warrants	1,285
Conversion of preferred stock upon initial public offering (in shares)		(5,763)	(1,629)	(6,108)	(8,912)	22,412
Conversion of preferred stock upon initial public offering	173,737	(31,837)	(11,298)	(35,469)	(95,111)	22	173,715
Issuance of common stock upon initial public offering, net of offering costs and underwriter commission (in shares)						6,166
Issuance of common stock upon initial public offering, net of offering costs and underwriter commission	75,790					6	75,784
Net settlement of common stock warrants (in share)						71
Net income (loss)	7,272							7,272
Other comprehensive income (loss)	25								25
Ending Balance at Dec. 29, 2012	119,119					32	340,221	(220,935)	(199)
Ending Balance (in shares) at Dec. 29, 2012						31,855
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options, net of repurchase liability and including vesting of early exercises (in shares)						857
Exercise of stock options, net of repurchase liability and including vesting of early exercises	1,849					1	1,848
Stock-based compensation expense	6,615						6,615
Net income (loss)	(4,051)							(4,051)
Other comprehensive income (loss)	(1)								(1)
Ending Balance at Dec. 28, 2013	$ 123,531					$ 33	$ 348,684	$ (224,986)	$ (200)
Ending Balance (in shares) at Dec. 28, 2013						32,712

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Segment Information - Additional Information (Detail)	12 Months Ended
	Dec. 28, 2013 Segment
Segment Reporting [Abstract]
Number of segments	1

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Certain Financial Statement Information - Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 54,622	$ 48,007
Less accumulated depreciation and amortization	(31,500)	(25,136)
Property and equipment, Net	23,122	22,871
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	6,390	5,171
Computer equipment and software | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, Useful Life (Years)	3 years
Computer equipment and software | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, Useful Life (Years)	5 years
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, Useful Life (Years)	5 years
Property and equipment, Gross	40,427	33,753
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, Useful Life (Years)	7 years
Property and equipment, Gross	1,081	775
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, Useful Life (Years)	*
Property and equipment, Gross	5,180	4,477
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 1,544	$ 3,831

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Net Income (Loss) per Share (Tables)

12 Months Ended

Dec. 28, 2013

Earnings Per Share [Abstract]

Net Income (Loss) Per Share

	Years Ended
	December 28, 2013			December 29, 2012			December 31, 2011
Numerator:
Net income (loss)	$	(4,051	)	$	7,272		$	(9,682	)
Net income allocable to preferred stockholders	—			(4,515		)	—
Net income (loss) attributable to common stockholders	$	(4,051	)	$	2,757		$	(9,682	)
Denominator:
Weighted average common shares outstanding	32,296			14,303			2,737
Less: weighted average unvested shares of common stock subject to repurchase	(2		)	(12		)	(22		)
Weighted average common shares used in computing basic net income (loss) per share	32,294			14,291			2,715
Weighted average effect of potentially dilutive securities:
Stock options	—			4,359			—
Common stock warrants	—			1			—
Weighted average common shares used in computing diluted net income (loss) per share	32,294			18,651			2,715
Net income (loss) per share attributable to common stockholders:
Basic	$	(0.13	)	$	0.19		$	(3.57	)
Diluted	$	(0.13	)	$	0.15		$	(3.57	)
Historical outstanding anti-dilutive securities not included in diluted net income (loss) per share calculation:
Common stock options	8,227			1,030			7,240
Common stock warrants	1			—			72
Preferred stock (as converted)	—			—			22,365
Preferred stock warrants	—			—			205
	8,228			1,030			29,882

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- Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued inventory purchases	$ 1,717	$ 1,125
Accrued inventory repurchase obligation	6,510	6,900
Accrued other	3,602	4,647
Accrued liabilities	$ 11,829	$ 12,672

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Financial Instruments (Tables)

12 Months Ended

Dec. 28, 2013

Investments, All Other Investments [Abstract]

Cash and Marketable Securities' Cost, Unrealized Gains, Unrealized Losses and Fair Value by Significant Investment

The following tables show the Company’s cash and marketable securities’ cost, unrealized gains, unrealized losses and fair value by significant investment category measured at fair value on a recurring basis and recorded as cash and cash equivalents or short- and long-term marketable securities as of December 28, 2013:

	December 28, 2013
										Reported as
	Cost		Unrealized Gains		Unrealized Losses			Fair Value		Cash and Cash Equivalents		Short- Term Marketable Securities		Long-Term Marketable Securities
Cash	$	7,023	$	—	$	—		$	7,023	$	7,023	$	—	$	—
Level 1:
Money market funds	9,226		—		—			9,226		9,226		—		—
Subtotal	9,226		—		—			9,226		9,226		—		—
Level 2:
U.S. Agency securities	22,929		4		(3		)	22,930		—		15,929		7,001
Certificates of deposit	8,840		4		(10		)	8,834		—		5,959		2,875
Commercial paper	998		—		(1		)	997		—		997		—
Corporate notes and bonds	14,156		9		(3		)	14,162		—		5,150		9,012
Subtotal	46,923		17		(17		)	46,923		—		28,035		18,888
Total	$	63,172	$	17	$	(17	)	$	63,172	$	16,249	$	28,035	$	18,888

Summary of Financial Instruments Measured on Recurring Basis

The following table presents a summary of the Company’s financial instruments that are measured on a recurring basis as of December 29, 2012:

	December 29, 2012
										Reported as
	Cost		Unrealized Gains		Unrealized Losses			Fair Value		Cash and Cash Equivalents		Short- Term Marketable Securities		Long-Term Marketable Securities
Cash	$	24,703	$	—	$	—		$	24,703	$	24,703	$	—	$	—
Level 1:
Money market funds	18,923		—		—			18,923		18,923		—		—
Subtotal	18,923		—		—			18,923		18,923		—		—
Level 2:
U.S. Agency securities	24,339		2		(2		)	24,339		—		13,317		11,022
Certificates of deposit	9,285		2		(3		)	9,284		480		6,642		2,162
Commercial paper	2,893		1		—			2,894		—		2,894		—
Corporate notes and bonds	13,211		9		(4		)	13,216		—		7,508		5,708
Subtotal	49,728		14		(9		)	49,733		480		30,361		18,892
Total	$	93,354	$	14	$	(9	)	$	93,359	$	44,106	$	30,361	$	18,892

There were no transfers between Level 1, Level 2 or Level 3 securities in the year ended December 29, 2012.

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Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Statement of Cash Flows [Abstract]
Net income (loss)	$ (4,051)	$ 7,272	$ (9,682)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	6,589	4,579	3,980
Loss on disposal of property and equipment	46	31	8
Stock-based compensation	6,615	4,437	3,084
Revaluation of warrants to fair value	0	633	(36)
Imputed interest related to deposit arrangements, net	(313)	420	0
Amortization of premium and discount on investments, net	368	169	0
Cash received for lease incentive	135	115	348
Changes in operating assets and liabilities:
Accounts receivable	(3,634)	(255)	(1,303)
Inventories	3,545	(27,188)	(7,522)
Prepaids and other current and noncurrent assets	7,330	(7,751)	(2,271)
Accounts payable and accrued liabilities	(12,585)	16,098	13,032
Customer deposits	(11,425)	11,425	0
Deferred revenue	(6,217)	6,865	265
Net cash provided by (used in) operating activities	(13,597)	16,850	(97)
Investing activities
Purchases of property and equipment	(5,884)	(17,212)	(4,354)
Proceeds from sale of equipment	6	6	24
Purchases of marketable securities	(39,097)	(54,663)	0
Sale and maturity of marketable securities	41,027	5,100	0
Net cash used in investing activities	(3,948)	(66,769)	(4,330)
Financing activities
Payments on obligations under capital leases	(37)	(661)	(681)
Payments on notes payable	0	(1,618)	(820)
Proceeds from line of credit	0	3,000	4,500
Payments on line of credit	0	(10,749)	0
Proceeds from exercise of stock options	1,845	445	148
Proceeds from exercise of warrants	0	31	0
Payments on customer deposit financing arrangement	(12,084)	0	0
Proceeds from customer deposit financing arrangement	0	13,000	0
Proceeds from initial public offering, net of underwriter commissions	0	80,278	0
Costs paid in connection with initial public offering	0	(1,811)	(1,845)
Net cash provided by (used in) financing activities	(10,276)	81,915	1,302
Effect of exchange rate changes on cash and cash equivalents	(36)	(9)	18
Net change in cash and cash equivalents	(27,857)	31,987	(3,107)
Cash and cash equivalents at beginning of year	44,106	12,119	15,226
Cash and cash equivalents at end of year	16,249	44,106	12,119
Supplemental disclosure of cash flow information
Interest paid	3	388	345
Income taxes paid	149	119	82
Supplemental disclosure of non cash financing activities
Reclassification of restricted stock to equity upon vesting of early exercised options	4	13	42
Loan and capital lease obligation for capital equipment and software	0	0	207
Conversion of convertible preferred stock to common stock	$ 0	$ 173,715	$ 0

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Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 28, 2013	Dec. 29, 2012
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	32,712,000	31,855,000
Common stock, shares outstanding	32,712,000	31,855,000

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Employee Benefits

12 Months Ended

Dec. 28, 2013

Postemployment Benefits [Abstract]

Employee Benefits

Employee Benefits

The Company has a defined contribution 401(k) plan for employees who are at least 21 years of age. Under the terms of the plan, employees may make voluntary contributions as a percent of compensation, but not in excess of the maximum amounts allowed under the Internal Revenue Code. The Company’s contributions to the plan are discretionary and no contributions were made by the Company for any of the periods presented.

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Document and Entity Information (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Feb. 12, 2014
Document Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 28, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	FY
Trading Symbol	PSMI
Entity Registrant Name	PEREGRINE SEMICONDUCTOR CORP
Entity Central Index Key	0000880177
Current Fiscal Year End Date	--12-28
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		33,055,714
Entity Public Float	$ 290.7

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Concentrations and Geographic Information

12 Months Ended

Dec. 28, 2013

Risks and Uncertainties [Abstract]

Concentrations and Geographic Information

Concentrations and Geographic Information

The Company sells a majority of its products throughout North America, Asia and Europe. The Company makes periodic evaluations of the credit worthiness of its customers and does not require collateral for credit sales. The Company recognizes an allowance for doubtful accounts relating to accounts receivable for amounts deemed uncollectible. The Company considers customer specific issues, such as financial stability and ability to pay, when determining collectability of accounts receivable and appropriate allowances to record. The Company’s allowance for doubtful accounts was $100 as of December 28, 2013 and December 29, 2012.

Customers that exceeded 10% of total net revenue were as follows:

	Years Ended
	December 28, 2013		December 29, 2012		December 25, 2010
Macnica	69	%	72	%	48	%
Richardson	11	%	11	%	16	%

Customers whose balance represented greater than 10% of accounts receivable were as follows:

	December 28, 2013		December 29, 2012
Macnica	50	%	43	%
Richardson	*		14	%

*     Less than 10% of accounts receivable for the respective period end

Net revenue is allocated to the geographic region where the customer, or its business unit that makes the purchase is geographically based, or where the services were provided. Net revenue by geographic region was as follows:

	Years Ended
	December 28, 2013				December 29, 2012				December 31, 2011
United States	$	35,089	17	%	$	34,489	17	%	$	31,921	30	%
Japan	142,389		71		147,458		72		52,062		48
All others	24,838		12		21,961		11		23,788		22
	$	202,316	100	%	$	203,908	100	%	$	107,771	100	%

As of December 28, 2013 and December 29, 2012 substantially all of the Company’s long-lived tangible assets are located in the U.S.

In addition, four vendors supplied 95% and 98% of the Company’s raw material for the years ended December 28, 2013 and December 29, 2012, respectively.

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Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Income Statement [Abstract]
Net revenue	$ 202,316	$ 203,908	$ 107,771
Cost of net revenue	120,920	124,135	70,955
Gross profit	81,396	79,773	36,816
Operating expense:
Research and development	42,192	34,134	22,730
Selling, general and administrative	43,142	36,971	23,252
Total operating expense	85,334	71,105	45,982
Income (loss) from operations	(3,938)	8,668	(9,166)
Interest expense, net	(130)	(1,354)	(311)
Other income (expense), net	84	(130)	(9)
Income (loss) before income taxes	(3,984)	7,184	(9,486)
Provision (benefit) for income taxes	67	(88)	196
Net income (loss)	(4,051)	7,272	(9,682)
Net income allocable to preferred stockholders	0	(4,515)	0
Net income (loss) attributable to common stockholders	$ (4,051)	$ 2,757	$ (9,682)
Net income (loss) per share attributable to common stockholders:
Basic, in dollars per share	$ (0.13)	$ 0.19	$ (3.57)
Diluted, in dollars per share	$ (0.13)	$ 0.15	$ (3.57)
Shares used to compute net income (loss) per share attributable to common stockholders:
Basic, in shares	32,294	14,291	2,715
Diluted, in shares	32,294	18,651	2,715

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Stockholders' Equity

12 Months Ended

Dec. 28, 2013

Equity [Abstract]

Stockholders' Equity

Stockholders’ Equity

Preferred Stock

Immediately prior to the closing of the IPO in August 2012, all shares of the Company’s then-outstanding convertible preferred stock outstanding automatically converted into 22,412 shares of common stock. The Company initially recorded each series of convertible preferred stock at their fair values on the dates of issuance, net of issuance costs. A redemption event would only occur upon the liquidation or winding up of the Company, a greater than 50% change of control or sale of substantially all of the assets of the Company. As the redemption event was outside the control of the Company, all shares of convertible preferred stock were presented outside of permanent equity in accordance with accounting guidance for redeemable securities.

Warrants

In May 2012, holders of Series D1 convertible preferred stock warrants net settled 80 of their warrants for 19 shares of Series D1 convertible preferred stock. On the date of the settlement, the Company de-recognized the fair value of the preferred stock warrant liability of $477 against convertible preferred stock.

The Company’s certificate of incorporation includes provisions which, based on approval of the board of directors and a majority of the stockholders of the Company, allow for a sale of the assets of the business whereby the Company could be required to pay the liquidation preference on outstanding convertible preferred stock. As a result of these provisions, warrants to purchase convertible preferred stock were accounted for as liabilities. The Company adjusts the carrying value of such warrants to their estimated fair value at each reporting date and increases or decreases in the fair value of such warrants are recorded as interest expense in the consolidated statements of operations. The Company recorded changes to the fair value of the warrant liability of ($634) and $36 for the years ended December 29, 2012 and December 31, 2011, respectively. The changes in the warrant liability are recorded in interest expense.

Stock-Based Compensation

2004 Plan: The Company is authorized to issue 6,495 shares upon the exercise of options to purchase common shares to employees, directors and consultants under a stock option plan adopted in 2004, as amended (the 2004 Plan). The 2004 Plan provides for the issuance of both incentive stock options (ISOs) and nonstatutory stock options (NSOs). NSOs may be granted to employees, directors or consultants, while ISOs may be granted only to employees. Options granted vest over a maximum period of four years and expire ten years from the date of grant. New hire stock options generally vest over four years, 25% on the first anniversary of the date of grant and monthly thereafter for the remaining three years. Stock options are not participating in any dividends declared by the Company.

2012 Plan: In April 2012, the Company’s board of directors adopted the 2012 Equity Incentive Plan (the 2012 Plan) and the stockholders approved it in May 2012. The 2012 Plan became effective on the completion of the IPO. The 2012 Plan authorizes the grant of ISOs, NSOs, stock appreciation rights, restricted stock, stock units, and performance cash awards.

2012 ESPP: In April 2012, the Company’s board of directors adopted the 2012 Employee Stock Purchase Plan (the 2012 ESPP) and the stockholders approved it in May 2012. The 2012 ESPP became effective on the completion of the IPO. A total of 1,000 shares of common stock will be made available for sale under the 2012 ESPP. The 2012 ESPP permits participants to purchase common stock at a discount through contributions of up to 15% of their eligible compensation. The 2012 ESPP will be implemented through offering periods of approximately six months in duration. The purchase price of shares will be 85% of the lower of the fair market value of the Company’s common stock on the first trading day of each offering period or on the purchase date. No offering periods have commenced to date with respect to the 2012 ESPP.

The Company uses the Black-Scholes valuation model to calculate the fair value of stock options. The fair value of stock options was estimated at the grant date using the following weighted-average assumptions:

	Years Ended
	December 28, 2013			December 29, 2012			December 31, 2011
Expected term (years)	5.00			5.00			5.24
Risk-free interest rate	0.80		%	0.72		%	1.26		%
Dividend rate	—			—			—
Volatility	61		%	62		%	61		%
Forfeiture rate	3		%	3		%	3		%
Estimated fair value per stock option	$	5.26		$	8.37		$	4.47

The risk-free interest rate assumption was based on the U.S. Treasury’s rates for U.S. Treasury constant maturities similar to those of the expected term of the award being valued. The assumed dividend yield was based on the Company’s expectation of not paying dividends in the foreseeable future. The Company utilizes data of peer companies to determine the weighted average expected term in an effort to better align the expected term of the Company’s options with the term experienced by the Company’s peers. In addition, due to the Company’s limited historical data, the estimated volatility incorporates the historical volatility of comparable companies whose share prices are publicly available.

The following summarizes activity related to the Company’s stock options under the 2004 Plan and 2012 Plan at December 28, 2013:

	Options Outstanding		Weighted-Average Exercise  Price		Aggregate Intrinsic  Value		Weighted-Average Remaining Contractual  Term (Years)
Outstanding at December 25, 2010	6,135		$	2.86	$	37,360	7.04
Granted	1,349		9.69
Exercised	(105	)	1.84
Forfeited	(139	)	5.94
Outstanding at December 31, 2011	7,240		$	4.11	$	34,493	6.68
Granted	903		15.98
Exercised	(432	)	1.07
Forfeited	(109	)	8.49
Outstanding at December 29, 2012	7,602		$	5.61	$	69,449	6.35
Granted	1,862		10.27
Exercised	(857	)	2.13
Forfeited	(380	)	12.52
Outstanding at December 28, 2013	8,227		$	6.71	$	19,870	6.27
Vested and expected to vest at December 28, 2013	8,076		$	6.63	$	19,870	6.22
Exercisable at December 28, 2013	5,023		$	4.15	$	19,805	4.76

Total stock-based compensation expense recognized during the years ended December 28, 2013, December 29, 2012, and December 31, 2011 was comprised of the following:

	Years Ended
	December 28, 2013		December 29, 2012		December 31, 2011
Cost of net revenue	$	883	$	588	$	431
Research and development	2,097		1,419		762
Selling, general and administrative	3,635		2,430		1,891
	$	6,615	$	4,437	$	3,084

The total intrinsic value of stock options exercised was $6,926, $5,491 and $757 for the years ended December 28, 2013, December 29, 2012, and December 31, 2011, respectively. Upon exercise, the Company issues new shares of stock. As of December 28, 2013, the unrecognized estimated stock-based compensation related to nonvested stock options granted as of that date was $13,108, which is expected to be recognized over a weighted-average period of approximately 2.1 years. If there are any modifications or cancellations of the underlying unvested securities, the Company may be required to accelerate, increase or cancel any remaining unearned stock-based compensation expense. Future stock-based compensation expense and unearned stock-based compensation will increase to the extent that the Company grants additional equity awards or assumes unvested equity awards in connection with acquisitions.

Shares Reserved for Future Issuance

The following common stock is reserved for future issuance at December 28, 2013 and December 29, 2012:

	December 28, 2013	December 29, 2012
Common stock warrants	2	2
Stock awards issued and outstanding	8,227	7,602
Authorized for grants under the 2012 Plan and 2012 ESPP	3,787	3,996
	12,016	11,600

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Financial Instruments

12 Months Ended

Dec. 28, 2013

Investments, All Other Investments [Abstract]

Financial Instruments

Financial Instruments

The following tables show the Company’s cash and marketable securities’ cost, unrealized gains, unrealized losses and fair value by significant investment category measured at fair value on a recurring basis and recorded as cash and cash equivalents or short- and long-term marketable securities as of December 28, 2013:

	December 28, 2013
										Reported as
	Cost		Unrealized Gains		Unrealized Losses			Fair Value		Cash and Cash Equivalents		Short- Term Marketable Securities		Long-Term Marketable Securities
Cash	$	7,023	$	—	$	—		$	7,023	$	7,023	$	—	$	—
Level 1:
Money market funds	9,226		—		—			9,226		9,226		—		—
Subtotal	9,226		—		—			9,226		9,226		—		—
Level 2:
U.S. Agency securities	22,929		4		(3		)	22,930		—		15,929		7,001
Certificates of deposit	8,840		4		(10		)	8,834		—		5,959		2,875
Commercial paper	998		—		(1		)	997		—		997		—
Corporate notes and bonds	14,156		9		(3		)	14,162		—		5,150		9,012
Subtotal	46,923		17		(17		)	46,923		—		28,035		18,888
Total	$	63,172	$	17	$	(17	)	$	63,172	$	16,249	$	28,035	$	18,888

There were no transfers between Level 1, Level 2 or Level 3 securities in the year ended December 28, 2013. All of the long-term marketable securities had remaining maturities of between one and two years in duration at December 28, 2013.

As of December 28, 2013, the Company had 39 investments in marketable securities with a fair value of $23,361 that were in an unrealized loss position of $17 for less than 12 months and considers the declines in market value to be temporary in nature and does not consider any of its investments other-than temporarily impaired. When evaluating an investment for other-than-temporary impairment, the Company reviews factors such as the length of time and extent to which fair value has been below its cost basis, the financial condition of the issuer and any changes thereto, and the Company’s intent to sell, or whether it is more likely than not it will be required to sell the investment before recovery of the investment’s cost basis.

The following table presents a summary of the Company’s financial instruments that are measured on a recurring basis as of December 29, 2012:

	December 29, 2012
										Reported as
	Cost		Unrealized Gains		Unrealized Losses			Fair Value		Cash and Cash Equivalents		Short- Term Marketable Securities		Long-Term Marketable Securities
Cash	$	24,703	$	—	$	—		$	24,703	$	24,703	$	—	$	—
Level 1:
Money market funds	18,923		—		—			18,923		18,923		—		—
Subtotal	18,923		—		—			18,923		18,923		—		—
Level 2:
U.S. Agency securities	24,339		2		(2		)	24,339		—		13,317		11,022
Certificates of deposit	9,285		2		(3		)	9,284		480		6,642		2,162
Commercial paper	2,893		1		—			2,894		—		2,894		—
Corporate notes and bonds	13,211		9		(4		)	13,216		—		7,508		5,708
Subtotal	49,728		14		(9		)	49,733		480		30,361		18,892
Total	$	93,354	$	14	$	(9	)	$	93,359	$	44,106	$	30,361	$	18,892

There were no transfers between Level 1, Level 2 or Level 3 securities in the year ended December 29, 2012.

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Certain Financial Statement Information (Tables)

12 Months Ended

Dec. 28, 2013

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Inventories

Inventories consisted of the following:

	December 28, 2013		December 29, 2012
Raw materials	$	22,265	$	20,986
Work in progress	22,100		15,494
Finished goods	9,124		20,537
	$	53,489	$	57,017

Property and Equipment

Property and equipment consisted of the following:

	Useful Life (Years)	December 28, 2013			December 29, 2012
Computer equipment and software	3 – 5	$	6,390		$	5,171
Machinery and equipment	5	40,427			33,753
Office furniture and equipment	7	1,081			775
Leasehold improvements	*	5,180			4,477
Construction in progress		1,544			3,831
		54,622			48,007
Less accumulated depreciation and amortization		(31,500		)	(25,136		)
		$	23,122		$	22,871

*    Leasehold improvements are amortized over the estimated life of the asset or remaining term of the lease, whichever is shorter.

Accrued Liabilities

Accrued liabilities consisted of the following:

	December 28, 2013		December 29, 2012
Accrued inventory purchases	$	1,717	$	1,125
Accrued inventory repurchase obligation	6,510		6,900
Accrued other	3,602		4,647
	$	11,829	$	12,672

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Segment Information

12 Months Ended

Dec. 28, 2013

Segment Reporting [Abstract]

Segment Information

Segment Information

The Company operates in one segment related to the design, manufacturing and marketing of high performance RFICs for the space and military, broadband, industrial, mobile device, test and measurement equipment, and wireless infrastructure markets. The Company’s chief operating decision-maker is its chief executive officer, who reviews operating results on an aggregate basis and manages the Company’s resources and operations as a single operating segment.

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Supply and Prepayment Agreement

12 Months Ended

Dec. 28, 2013

Payables and Accruals [Abstract]

Supply and Prepayment Agreement

Supply and Prepayment Agreement

In March 2012, the Company entered into a supply and prepayment agreement with Murata Manufacturing Company, Ltd. (Murata). The agreement is for an initial term of 18 months. Under the terms of the original agreement, Murata agreed to prepay on certain purchase orders placed through a third party distributor and to pay the Company a total deposit of $14,000 between March and July 2012. On September 29, 2012, the Company and Murata agreed to reduce the deposits from $14,000 to $13,000. The Company has been repaying the deposit at a rate based on the number of RFICs purchased by Murata over the four quarters starting from the fourth quarter of fiscal 2012 of up to $13,000. As of December 28, 2013, the Company repaid $12,084 under the supply and prepayment agreement with Murata resulting in a remaining customer deposit of $916.

As of December 29, 2012, the Company received prepayments on purchases made by Macnica, which were applied against outstanding accounts receivable balances. There is no remaining prepayment as of December 28, 2013 as the agreement concluded on March 31, 2013 and the deposit was fully utilized in April 2013. As of December 29, 2012, customer deposits included in prepayments on purchase orders from Macnica totaled $11,425.

During 2012, the Company paid $4,000 in deposits to suppliers to support production levels. During the year ended December 28, 2013, the Company received $3,755 in deposit repayments from suppliers resulting in a remaining balance of $245, which is included in prepaids and other current assets.

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Unaudited Quarterly Financial Data (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Quarterly Financial Information Disclosure [Abstract]
Net revenue	$ 43,324	$ 60,002	$ 52,365	$ 46,625	$ 62,999	$ 60,575	$ 43,639	$ 36,695	$ 202,316	$ 203,908	$ 107,771
Gross Profit	15,607	25,253	20,719	19,817	27,282	25,015	16,241	11,235	81,396	79,773	36,816
Net income (loss)	$ (6,828)	$ 4,433	$ (448)	$ (1,208)	$ 5,627	$ 4,713	$ (26)	$ (3,042)	$ (4,051)	$ 7,272	$ (9,682)
Diluted Net Income (Loss) Per Share, in dollars per share	$ (0.21)	$ 0.12	$ (0.01)	$ (0.04)	$ 0.15	$ 0.10	$ (0.01)	$ (1.10)	$ (0.13)	$ 0.15	$ (3.57)

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Income Taxes

12 Months Ended

Dec. 28, 2013

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

Income (loss) before income tax consisted of the following for the years ended:

	December 28, 2013			December 29, 2012		December 31, 2011
Domestic	$	(4,404	)	$	6,946	$	(9,849	)
Foreign	420			238		363
Income (loss) before income taxes	$	(3,984	)	$	7,184	$	(9,486	)

The provision (benefit) for income taxes is as follows for the years ended:

	December 28, 2013			December 29, 2012			December 31, 2011
Current (benefit) provision:
Federal	$	(81	)	$	(300	)	$	20
State	(32		)	49			—
Foreign	137			141			175
Total current	24			(110		)	195
Deferred provision:
Federal	—			—			—
State	—			—			—
Foreign	43			22			1
Total deferred	43			22			1
Total income tax provision (benefit)	$	67		$	(88	)	$	196

A reconciliation of the federal statutory rate to the effective rate is as follows:

	December 28, 2013		December 29, 2012		December 31, 2011
Income tax provision (benefit) on earnings at federal statutory rate	(35.0	)%	35.0	%	(35.0	)%
State tax provision (benefit), net of federal benefit	0.9		3.2		(2.3	)
Federal and state tax credits	(74.6	)	(8.1	)	(15.8	)
Change in valuation allowance	116.2		(47.9	)	55.2
Stock-based compensation	(7.9	)	4.1		4.2
Valuation of warrants	—		3.1		(0.1	)
Deemed repatriation of foreign earnings	—		3.6		—
Nondeductible expenses and other permanent differences, net	2.1		5.8		(4.1	)
Income tax provision (benefit)	1.7	%	(1.2	)%	2.1	%

The components of the Company’s deferred tax assets and liabilities are summarized as follows:

	December 28, 2013			December 29, 2012
Deferred tax assets:
Net operating loss carryforwards	$	55,010		$	55,758
Research tax credit carryforwards	10,177			7,232
Accrued expenses and reserves	9,559			6,378
Foreign deferred tax assets	—			12
Total deferred tax assets	74,746			69,380
Deferred tax liabilities:
Depreciation	(3,669		)	(2,918		)
Foreign deferred tax liabilities	(32		)	—
Total deferred tax liabilities	(3,701		)	(2,918		)
Less valuation allowance	(71,077		)	(66,450		)
Net deferred tax asset (liability)	$	(32	)	$	12

The valuation allowance has been established to offset domestic deferred tax assets, as realization of such assets is not considered to be more likely than not due to the Company’s recent history of losses and uncertainties regarding the Company’s ability to generate future taxable income sufficient to utilize the existing deferred tax assets prior to their expiration.

At December 28, 2013, the Company had U.S. federal and state net operating loss (NOL) carryforwards of approximately $147,545 and $102,481, respectively, after taking into consideration the impact of Internal Revenue Code Section 382 as discussed below. The federal net loss carryforwards will expire between 2018 and 2031, unless previously utilized. The state net loss carryforwards will expire between 2014 and 2031, unless previously utilized.

During the year ended December 28, 2013, the Company generated excess tax benefits of approximately $1,654 from the settlement of certain stock awards. The tax benefit will be recorded as a credit to additional paid-in capital in the year the deduction reduces income tax payable.

The Company had tax credit carryforwards of approximately $7,226 for federal and $9,934 for state purposes at December 28, 2013. The federal credits will begin to expire in 2024. The state research and development tax credit does not expire.

Pursuant to Sections 382 and 383 of the Internal Revenue Code (the Code), annual use of the Company’s NOL and research credit carryforwards may be limited in the event a cumulative change in ownership of 50% of certain stockholders occurs within a three year period. An ownership change may limit the amount of NOL and research credit carryforwards that can be utilized annually to offset future taxable income and tax, respectively. In general, an “ownership change” as defined by Section 382 of the Code results from a transaction or series of transactions over a three-year period resulting in an ownership change of more than 50 percentage points of the outstanding stock of a company by certain stockholders.

The Company completed a study to assess whether an ownership change has occurred since the Company’s formation through December 28, 2013. Based upon this study, the Company believes that several ownership changes have occurred.  The Company has reduced its deferred tax assets related to the NOL and R&D tax credit carryovers that are anticipated to expire unused as a result of the ownership changes. These tax attributes have been excluded from deferred tax assets with a corresponding reduction of the valuation allowance with no net effect on income tax expense or the effective tax rate. Future ownership changes may further limit the Company’s ability to utilize its remaining tax attributes. 

As of December 28, 2013, the Company has not provided for U.S. federal and state income taxes and foreign withholding taxes on approximately $237 of undistributed earnings of certain foreign subsidiaries as these earnings are considered indefinitely reinvested outside of the United States. Determination of the amount of any unrecognized deferred income tax liability on this temporary difference is not practicable due to the complexities of the hypothetical calculation. If management decides to repatriate such foreign earnings in future periods, the Company may incur incremental U.S. federal and state income taxes as well as foreign withholding taxes. However, the Company's intent is to keep these funds indefinitely reinvested outside the U.S. and its current plans do not demonstrate a need to repatriate them to fund U.S. operations. For certain earnings of foreign subsidiaries not considered indefinitely reinvested, such as Subpart F of the U.S. Internal Revenue Code (Subpart F), the Company has provided U.S. income taxes and foreign withholding taxes on these undistributed earnings. As of the year ended December 28, 2013, the Company recorded U.S. income taxes and foreign withholding taxes on $774 of undistributed earnings of foreign subsidiaries. During 2012, the Company recorded U.S. income taxes on approximately $900 of Subpart F earnings of foreign subsidiaries.

The following table summarizes the activity related to the Company’s unrecognized tax benefits:

	December 28, 2013			December 29, 2012			December 31, 2011
Balance at beginning of year	$	3,742		$	2,035		$	1,863
Increases (decreases) related to prior year tax positions	861			1,621			(5		)
Increases related to current year tax positions	1,196			279			177
Expirations of the statute of limitations for the assessment of taxes	(68		)	(193		)	—
Balance at end of year	$	5,731		$	3,742		$	2,035

Approximately $68 and $261 of the total unrecognized tax benefits at December 29, 2012 and December 31, 2011, respectively, would reduce the Company’s annual effective tax rate if recognized, and the remainder would have no effect as long as the Company’s deferred tax assets remain subject to a valuation allowance.

The Company does not anticipate any increases or decreases in the unrecognized tax benefit over the next 12 months.

Due to the NOL and credit carryforwards, the U.S. federal and state returns are open to examination by the Internal Revenue Service and state jurisdictions for years 1998 through 2012. The foreign income tax returns are open to examination for the years 2011 through 2013.

The Company’s policy is to recognize interest expense and penalties related to income tax matters as a component of income tax expense. There was approximately $12 accrued interest and penalties associated with uncertain tax positions as of December 29, 2012 and no accrued interest as of December 28, 2013. The amount of interest and penalties recognized during the years ended December 28, 2013, December 29, 2012, and December 31, 2011 was $12, $85, and $20, respectively.

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Commitments and Contingencies

12 Months Ended

Dec. 28, 2013

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Leases

The Company leases its primary operating facilities in San Diego, CA under operating lease agreements which expire on December 31, 2015. Future minimum annual payments under the operating lease for fiscal 2014 and 2015 are approximately $898 and $953, respectively. In addition, the Company leases certain equipment and software under operating lease agreements which expire between 2014 and 2016. Total operating lease and license expense was $4,045, $3,606, and $3,154 for the years ended December 28, 2013, December 29, 2012, and December 31, 2011, respectively.

Annual future minimum obligations under operating leases and licensing agreements as of December 28, 2013, are as follows:

Fiscal years:
2014	$	2,428
2015	1,366
2016	51
Total minimum lease payments	$	3,845

Long-term debt obligations

In May 2013, the Company amended its existing loan and security agreement, which increased the maximum line of credit availability up to $25,000 in accounts receivable financing. The Company is obligated to pay interest at the rate of LIBOR plus 2.0% to 2.5% subject to certain covenants. Interest is payable monthly with the principal due at the maturity date, December 31, 2015. At December 28, 2013 and December 29, 2012, there was no outstanding balance and there was $19,178 and $14,414 available, respectively. The agreement contains certain financial covenants, including covenants relating to our required liquidity ratio and minimum tangible net worth. The Company was in compliance with its financial covenants at December 28, 2013.

Legal Proceedings

On February 14, 2012, the Company filed a lawsuit in the U.S. District Court for the Central District of California, which was subsequently moved to the U.S. District Court for the Southern District of California. The action alleges the infringement of five of the Company’s patents relating to RFICs and switching technology by RF Micro Devices, Inc. (RFMD). The lawsuit alleges that certain of RFMD’s products infringe the Company’s patents relating to silicon on insulator (SOI) design technology for RFICs and seeks, in addition to damages, to permanently enjoin RFMD from further infringement. On March 26, 2013, the Company filed an additional lawsuit against RFMD in the U.S. District Court for the Southern District of California alleging infringement of a sixth patent relating to RFICs and switching technology by RFMD. On April 25, 2013, the Company consolidated these two U.S. District Court actions into one lawsuit. On September 27, 2013, the U.S. District Court set a trial date for November 12, 2014. On December 12, 2013, RFMD filed a counterclaim alleging the Company violates a patent owned or licensed by RFMD. Pursuing these actions is costly and could impose a significant burden on management and employees. The Company may receive unfavorable interim rulings in the course of this litigation and there can be no assurance that a favorable outcome will ultimately be obtained. The Company believes the outcome of this pending litigation will not have, individually or in the aggregate, a material adverse effect on its consolidated financial statements.

On November 14, 2013, representatives of the U.S. Department of Homeland Security (DHS), in collaboration with the United States Attorney’s Office for the Southern District of California (USAO), executed a federal search warrant at the Company's San Diego facilities in connection with an investigation into exports and temporary imports of certain products sold in the aerospace market. The Company is cooperating fully with the USAO and DHS officials. No claims have been asserted and no amounts have been accrued for this contingency in the consolidated financial statements.

The U.S. Department of State, Office of Defense Trade Controls Compliance (USDS), is conducting a review of the Company’s compliance with the Arms Export Control Act (AECA) and the AECA’s implementation of International Traffic In Arms Regulations (ITAR).  Based on this review the Company could be subject to continued investigation and potential regulatory consequences related to these violations ranging from a no-action letter, government oversight of facilities and export transactions, monetary penalties of up to $500 per violation, and in certain cases, debarment from government contracting, denial of export privileges, and criminal penalties. No claims have been asserted and no amounts have been accrued for this contingency in the consolidated financial statements. Furthermore, due to the preliminary nature of the investigation and the USDS review, the Company believes it is not possible to estimate the likelihood of an unfavorable outcome or the possible loss or range of losses in the event of an unfavorable outcome.

The Company monitors the status of these and other contingencies on an ongoing basis to ensure amounts are recognized and/or disclosed in our financial statements and footnotes as required by ASC 450, Loss Contingencies. At the time of this filing, the Company had not recorded any accrual for loss contingencies associated with its legal proceedings as losses resulting from such matters were determined not to be probable.

From time to time, the Company is subject to various claims and suits arising in the ordinary course of business, including commercial, employment and environmental matters. The Company does not expect that the resolution of these matters will have a material adverse effect on its consolidated financial position or results of operations.

Commitments

The Company has open non-cancelable inventory purchase commitments of $12,345 as of December 28, 2013. Inventory purchase obligations represent purchase commitments for fixed prices and quantities of wafers, assembly, and test services. We expect to receive and pay for the majority of these materials and services during the next twelve months.

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Restructuring

12 Months Ended

Dec. 28, 2013

Restructuring and Related Activities [Abstract]

Restructuring Charges

Restructuring

During December 2013, the Company made adjustments to reduce operating expense. These actions included consolidating office locations and reduction in employees across the Company’s operations in the U.S. and Japan. The restructuring was driven by long-term strategic and operational decisions.

The following table summarizes the restructuring activity and related accrual at December 28, 2013:

	Balance at December 29, 2012		Current Charges		Cash Payments			Balance at December 28, 2013
Employee termination benefits	$	—	$	636	$	(218	)	$	418
Lease and other contract termination costs	—		73		(35		)	38
Total	$	—	$	709	$	(253	)	$	456

The remaining restructuring accrual balance of $456 as of December 28, 2013 is included in accrued liabilities and is expected to be paid in the first quarter of fiscal 2014. The accrual balance approximates fair value due to the short-term payment period. During the year ended December 28, 2013, the Company recorded restructuring expense of $340 in cost of net revenues and $369 in selling, general and administrative.

Subsequent to the year ended December 28, 2013, on January 30, 2014, the Company approved a restructuring plan. The plan consists of a reduction in force which will be substantially completed by the end of the first quarter of 2014. The total charge resulting from this plan is expected to be approximately $1,500 to $2,000.

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Certain Financial Statement Information - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Write downs to inventories	$ 5,725	$ 1,920
Reductions to the carrying value of inventory	2,041		3,355
Inventories held by third parties	7,874	13,616
Depreciation and amortization expense	$ 6,589	$ 4,579	$ 3,980

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Annual Future Minimum Obligations Under Operating Leases and Capital Leases (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2013
Commitments and Contingencies Disclosure [Abstract]
2014	$ 2,428
2015	1,366
2016	51
Total minimum lease payments	$ 3,845

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Organization and Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 28, 2013

Accounting Policies [Abstract]

The Company

The Company

Peregrine Semiconductor Corporation (the Company) is a fabless provider of high performance radio frequency integrated circuits (RFICs). The Company’s solutions leverage its proprietary UltraCMOS technology which enables the design, manufacture, and integration of multiple RF, mixed signal, and digital functions on a single chip. The Company’s

solutions target a broad range of applications in the space and military, automotive, broadband, industrial, mobile device, test and measurement equipment, and wireless infrastructure markets.

Principles of Consolidation

Principles of Consolidation

The consolidated financial statements include the accounts of the Company and its subsidiaries. All significant intercompany transactions have been eliminated upon consolidation.

Accounting Periods

Accounting Periods

The Company uses a 52- or 53-week fiscal year ending on the last Saturday in December. Fiscal years 2013 and 2012 were 52-week years ending on December 28, 2013 and December 29, 2012, respectively.

Use of Estimates

Use of Estimates

The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amount of assets and liabilities at the date of the financial statements as well as the reported amounts of net revenue and expense during the reporting period. The Company regularly evaluates estimates and assumptions related to areas such as revenue recognition, allowances for doubtful accounts, warranty obligations, inventory valuation, stock-based compensation expense, deferred income tax valuation allowances, litigation and other loss contingencies. These estimates and assumptions are based on current facts, historical experience and various other factors believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities and the recording of revenue, costs and expenses that are not readily apparent from other sources. Actual results may differ materially and adversely from these estimates. To the extent there are material differences between the estimates and actual results, the Company’s future results of operations will be affected.

Concentration of Credit Risk

Concentration of Credit Risk

Financial assets and liabilities, which potentially subject the Company to concentrations of credit risk, consist primarily of cash equivalents, marketable securities, and accounts receivable. The Company limits its exposure to credit loss by placing its cash in high credit quality financial investments. At times, such deposits may be in excess of insured limits. The Company has not experienced any significant losses on its investments.

Deferred Initial Public Offering Costs

Deferred Initial Public Offering Costs

Deferred IPO costs, consisting of direct legal, accounting, and other fees and costs, were capitalized and included in other assets on the Company’s consolidated balance sheet for the periods presented prior to August 2012.

Fair Value of Financial Instruments

Fair Value of Financial Instruments

The Company applies fair value accounting for all financial assets and liabilities that are recognized or disclosed at fair value in the financial statements on a recurring basis. The Company’s financial instruments consist principally of cash and cash equivalents and marketable securities. The fair value of a financial instrument is the amount that would be received in an asset sale or paid to transfer a liability in an orderly transaction between unaffiliated market participants. Assets and liabilities measured at fair value are categorized based on whether or not the inputs are observable in the market and the degree that the inputs are observable. The categorization of financial instruments within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The hierarchy is prioritized into three levels (with Level 3 being the lowest) defined as follows:

Level 1: Inputs are based on quoted market prices for identical assets or liabilities in active markets at the measurement date.

Level 2: Inputs include quoted prices for similar assets or liabilities in active markets and/or quoted prices for identical or similar assets or liabilities in markets that are not active near the measurement date.

Level 3: Inputs include management’s best estimate of what market participants would use in pricing the asset or liability at the measurement date. The inputs are unobservable in the market and significant to the instrument’s valuation.

The fair value of the Company’s cash equivalents was determined based on “Level 1” inputs. The fair value of marketable securities was determined based on “Level 2” inputs. The fair value of the Company’s “Level 2” instruments were valued based on the market approach technique which uses quoted market prices or model driven valuations using significant inputs derived from or corroborated by observable market data. The Company does not have any marketable securities in the “Level 3” category. The Company believes that the recorded values of all of the other financial assets and liabilities approximate their current fair values because of maturity and respective duration of these assets and liabilities.

Cash, Cash Equivalents and Marketable Securities

Cash, Cash Equivalents and Marketable Securities

The Company considers all highly liquid investments that are readily convertible into cash and have a maturity of three months or less at the time of purchase to be cash equivalents. The cost of these investments approximates their fair value. The Company maintains an investment portfolio of various security holdings, types and maturities. The Company defines marketable securities as income yielding securities that can be readily converted into cash. Marketable securities’ short-term and long-term classifications are based on remaining maturities at each reporting period. The Company’s marketable securities include U.S. agency securities, certificates of deposit, commercial paper, and corporate notes and bonds. The Company places its cash investments in instruments that meet various parameters, including credit quality standards as specified in the Company’s investment policy.

The Company accounts for marketable securities as available-for-sale. Management determines the appropriate classification of such securities at the time of purchase and re-evaluates such classification as of each balance sheet date. Cash equivalents and marketable securities are reported at fair value with the related unrealized gains and losses included in accumulated other comprehensive income (loss), a component of shareholders’ equity, net of tax. The Company assesses whether its investments with unrealized loss positions are other than temporarily impaired. Unrealized gains and losses and declines in value judged to be other than temporary, if any, are determined based on the specific identification method and are reported in other income, net in the consolidated statements of operations.

Inventories

Inventories

Inventories are stated at the lower of cost (first-in, first-out) or market. Inventory reserves or lower of cost or market allowances are established on a part specific basis for estimated obsolescence or unmarketable inventory equal to the difference between the cost of inventory and the estimated realizable value based upon assumptions about future demand and market conditions and reduce the carrying value of the related inventory. Such reductions establish a new cost basis for the specific parts. Shipping and handling costs are classified as a component of cost of net revenue in the consolidated statements of operations.

The Company continually assesses the recoverability of its inventory based on assumptions about demand and market conditions. Forecasted demand is determined based on historical sales and expected future sales. Determination of the market value may be complex, and therefore requires management to make assumptions and to apply judgment. In order for management to make the appropriate determination of market value, the following items are commonly considered: inventory turnover statistics, inventory quantities, unfilled customer order quantities, forecasted customer demand, competitive pricing, seasonality factors, consumer trends, and performance of similar products or accessories. Subsequent changes in facts or circumstances do not result in the reversal of previously recorded reserves. If actual market conditions are less favorable than those projected by management, additional inventory write-downs may be required that may adversely affect the Company’s operating results. If actual market conditions are more favorable, the Company may have higher gross profits when products are sold.

Property and Equipment

Property and Equipment

Property and equipment is carried at cost and is depreciated using the straight-line method over the useful lives of the assets ranging from three to seven years. Leasehold improvements are amortized over the estimated life of the asset or term of the lease, whichever is shorter.

Impairment of Long-Lived Assets

Impairment of Long-Lived Assets

The Company regularly reviews the carrying amount of its long-lived assets, as well as their useful lives, to determine whether indicators of impairment may exist which warrant adjustments to carrying values or estimated useful lives. An impairment loss would be recognized when the sum of the expected future undiscounted net cash flows is less than the carrying amount of the asset. Should impairment exist, the impairment loss would be measured based on the excess of the carrying amount of the asset over the asset’s fair value. The Company has not recognized any impairment losses through December 28, 2013.

Research and Development

Research and Development

Research and development costs are expensed as incurred.

Advertising Expense

Advertising Expense

The cost of advertising is expensed as incurred.

Revenue Recognition

Revenue Recognition

The Company recognizes revenue when each of the following have occurred: (1) there is persuasive evidence that an arrangement with the customer exists, which is generally a customer purchase order; (2) the products are delivered, which generally occurs when the products are shipped and title and risk of loss has been transferred to the customer; (3) the selling price is fixed or determinable; and (4) collection of the customer receivable is deemed reasonably assured.

The Company records revenue based on facts available at the time of sale. Amounts that are not probable of collection once the product has shipped and title has transferred to the customer are deferred until the amount that is probable of collection can be determined. Items that are considered when determining the amounts that will be ultimately collected are the customer’s overall creditworthiness and payment history.

For distributors with rights of return, revenue is not recognized until product is shipped to the end customer of the distributor and the amount that will ultimately be collected is determinable. The Company offers its distributors limited stock rotation, price protection, and in some situations, credits on pricing depending on their end customer (ship and debit credits). For these distributors revenue is not recognized until product is shipped to the end customer of the distributor and the amount that will ultimately be collected is determinable. On shipments where net revenue is not recognized, the Company records an accounts receivable and deferred revenue for the selling price as there is a legally enforceable right to payment. Inventory at distributors remains on the Company’s books at carrying value until sold by the distributor at which time the Company recognizes the net revenue and cost of net revenue. Revenues to these distributors are recorded net of any pricing adjustments for price protection or ship and debit credits in the same period as the sale of goods to their customers. The amount of any pricing adjustment is based on the difference between the price at which the distributor originally purchased the Company’s inventory and either: (1) a lower distribution price then being offered on those products for price protection; or (2) a special price offered to the distributor in order to meet competitive pressures in the marketplace for ship and debit credits. The Company does not currently offer rebates or other pricing incentives, except for volume purchase pricing at the time of sale, to direct customers or distributors.

The Company also maintains an allowance for doubtful accounts for estimated losses resulting from the inability of customers to make required payments. If the financial condition of any customer were to deteriorate, resulting in an impairment of its ability to make payments, additional allowances could be required.

Warranty Accrual

Warranty Accrual

The Company generally provides a product warranty for a period of one year; however, it may be longer for certain customers. Accordingly, the Company establishes provisions for estimated product warranty costs at the time net revenue is recognized based upon historical activity and, additionally, for any known product warranty issues. Warranty provisions are recorded as a cost of net revenue. The determination of such provisions requires the Company to make estimates of product return rates and expected costs to replace or rework the products under warranty. When the actual product failure rates, cost of replacements and rework costs differ from the original estimates, revisions to the estimated warranty accrual are made. Actual claims are charged against the warranty reserve.

Stock-Based Compensation

Stock-Based Compensation

The Company has stock incentive plans under which options to purchase common stock have been granted to employees, consultants and directors. The stock options have been granted to employees with exercise prices equal to or above the fair value of the underlying stock, as determined by the board of directors on the date the equity award was granted up until the Company’s initial public offering in August 2012. The board of directors determined the value of the underlying stock by considering a number of factors, including historical and projected financial results, the risks the Company faced at the time, the preferences of the Company’s preferred stock, and the lack of liquidity of the Company’s common stock. The fair value of equity instruments expected to vest are recognized and amortized on a straight-line basis over the requisite service period of the award, which is generally four years.

Foreign Currency Translation

Foreign Currency Translation

Functional currency of our international subsidiaries is the local currency. Resulting translation gains or losses are recognized as a component of other comprehensive income (loss). Transaction gains or losses related to balances denominated in a different currency than the functional currency are recognized in the statement of operations.

Other Income (Expense), net

Other Income (Expense), net

Other income (expense), net consists primarily of foreign currency exchange gains and losses.

Comprehensive Income (Loss)

Comprehensive Income (Loss)

Comprehensive income (loss) is defined as the change in equity during a period from transactions and other events and circumstances from non-owner sources. Net income (loss) and other comprehensive income (loss), consist of foreign currency translation adjustments and unrealized gains and losses on investments, are reported, net of their related tax effect, to arrive at comprehensive income (loss).

Income Taxes

Income Taxes

The Company accounts for income taxes using the asset and liability approach, the objective of which is to establish deferred tax assets and liabilities for the temporary differences between the financial reporting basis and the tax basis of our assets and liabilities, as measured by applying currently enacted tax laws. A valuation allowance is established for deferred tax assets if, based on the weight of available evidence, it is more likely than not that some portion or all of the deferred tax assets will not be realized. Future realization of the deferred tax asset is dependent on the reversal of existing taxable temporary differences, carryback potential, tax-planning strategies and on us generating sufficient taxable income in future years as the deferred income tax charges become currently deductible for tax reporting purposes. For the years ended December 28, 2013, December 29, 2012, and December 31, 2011, the Company has recorded a full valuation allowance against its domestic net deferred tax assets due to uncertainty of future realization.

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Income Taxes (Tables)

12 Months Ended

Dec. 28, 2013

Income Tax Disclosure [Abstract]

Income (Loss) Before Income Tax

Income (loss) before income tax consisted of the following for the years ended:

	December 28, 2013			December 29, 2012		December 31, 2011
Domestic	$	(4,404	)	$	6,946	$	(9,849	)
Foreign	420			238		363
Income (loss) before income taxes	$	(3,984	)	$	7,184	$	(9,486	)

Provision for Income Taxes

The provision (benefit) for income taxes is as follows for the years ended:

	December 28, 2013			December 29, 2012			December 31, 2011
Current (benefit) provision:
Federal	$	(81	)	$	(300	)	$	20
State	(32		)	49			—
Foreign	137			141			175
Total current	24			(110		)	195
Deferred provision:
Federal	—			—			—
State	—			—			—
Foreign	43			22			1
Total deferred	43			22			1
Total income tax provision (benefit)	$	67		$	(88	)	$	196

Reconciliation of Federal Statutory Rate to Effective Rate

A reconciliation of the federal statutory rate to the effective rate is as follows:

	December 28, 2013		December 29, 2012		December 31, 2011
Income tax provision (benefit) on earnings at federal statutory rate	(35.0	)%	35.0	%	(35.0	)%
State tax provision (benefit), net of federal benefit	0.9		3.2		(2.3	)
Federal and state tax credits	(74.6	)	(8.1	)	(15.8	)
Change in valuation allowance	116.2		(47.9	)	55.2
Stock-based compensation	(7.9	)	4.1		4.2
Valuation of warrants	—		3.1		(0.1	)
Deemed repatriation of foreign earnings	—		3.6		—
Nondeductible expenses and other permanent differences, net	2.1		5.8		(4.1	)
Income tax provision (benefit)	1.7	%	(1.2	)%	2.1	%

Components of Company's Deferred Tax Assets

The components of the Company’s deferred tax assets and liabilities are summarized as follows:

	December 28, 2013			December 29, 2012
Deferred tax assets:
Net operating loss carryforwards	$	55,010		$	55,758
Research tax credit carryforwards	10,177			7,232
Accrued expenses and reserves	9,559			6,378
Foreign deferred tax assets	—			12
Total deferred tax assets	74,746			69,380
Deferred tax liabilities:
Depreciation	(3,669		)	(2,918		)
Foreign deferred tax liabilities	(32		)	—
Total deferred tax liabilities	(3,701		)	(2,918		)
Less valuation allowance	(71,077		)	(66,450		)
Net deferred tax asset (liability)	$	(32	)	$	12

Unrecognized Tax Benefits

The following table summarizes the activity related to the Company’s unrecognized tax benefits:

	December 28, 2013			December 29, 2012			December 31, 2011
Balance at beginning of year	$	3,742		$	2,035		$	1,863
Increases (decreases) related to prior year tax positions	861			1,621			(5		)
Increases related to current year tax positions	1,196			279			177
Expirations of the statute of limitations for the assessment of taxes	(68		)	(193		)	—
Balance at end of year	$	5,731		$	3,742		$	2,035

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Unrecognized Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 3,742	$ 2,035	$ 1,863
Increases (decreases) related to prior year tax positions	861	1,621	(5)
Increases related to current year tax positions	1,196	279	177
Expirations of the statute of limitations for the assessment of taxes	(68)	(193)	0
Balance at end of year	$ 5,731	$ 3,742	$ 2,035

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Summary of Activity Related to Company's Stock Options (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Number of shares
Beginning Balance	7,602	7,240	6,135
Granted	1,862	903	1,349
Exercised	(857)	(432)	(105)
Forfeited	(380)	(109)	(139)
Ending Balance	8,227	7,602	7,240	6,135
Vested and expected to vest at end of period	8,076
Exercisable at end of period	5,023
Average Exercise Price per Share
Beginning Balance	$ 5.61	$ 4.11	$ 2.86
Granted	$ 10.27	$ 15.98	$ 9.69
Exercised	$ 2.13	$ 1.07	$ 1.84
Forfeited	$ 12.52	$ 8.49	$ 5.94
Ending Balance	$ 6.71	$ 5.61	$ 4.11	$ 2.86
Vested and expected to vest at end of period	$ 6.63
Exercisable at end of period	$ 4.15
Aggregate Intrinsic Value Intrinsic Value
Beginning Balance	$ 69,449	$ 34,493	$ 37,360
Ending Balance	19,870	69,449	34,493	37,360
Vested and expected to vest at end of period	19,870
Exercisable at end of period	$ 19,805
Weighed Average Remaining Contractual Term in years
Beginning balance	6 years 3 months 7 days	6 years 4 months 6 days	6 years 8 months 5 days	7 years 15 days
Ending balance	6 years 3 months 7 days	6 years 4 months 6 days	6 years 8 months 5 days	7 years 15 days
Vested and expected to vest at end of period	6 years 2 months 19 days
Exercisable at end of period	4 years 9 months 4 days

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Consolidated Statements Of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (4,051)	$ 7,272	$ (9,682)
Foreign currency translation adjustments	(1)	20	(20)
Unrealized gain on marketable securities	0	5	0
Comprehensive income (loss)	$ (4,052)	$ 7,297	$ (9,702)

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Certain Financial Statement Information

12 Months Ended

Dec. 28, 2013

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Certain Financial Statement Information

Certain Financial Statement Information

Inventories consisted of the following:

	December 28, 2013		December 29, 2012
Raw materials	$	22,265	$	20,986
Work in progress	22,100		15,494
Finished goods	9,124		20,537
	$	53,489	$	57,017

During the years ended December 28, 2013 and December 29, 2012, the Company recorded inventory write-downs of $5,725 and $1,920, respectively, related to excess and obsolete inventory as a result of changes in customer forecasted demand from one of the Company's distributors. During the year ended December 28, 2013 and December 31, 2011, the Company also recorded reductions to carrying value of inventories of $2,041 and $3,355, respectively, as a result of a lower of cost or market valuation. The write-downs in fiscal 2013 were due to anticipated selling price reductions the Company believes necessary to stimulate customer demand for certain products. These write-downs for fiscal 2011 were the result of lower than anticipated yields of certain wafers in new manufacturing processes. These inventory reductions were recorded in cost of net revenue.

Included in the table are inventories held by others, which include distributors and third-parties in the Company’s supply chain, of $7,874 and $13,616 at December 28, 2013 and December 29, 2012, respectively.

Property and equipment consisted of the following:

	Useful Life (Years)	December 28, 2013			December 29, 2012
Computer equipment and software	3 – 5	$	6,390		$	5,171
Machinery and equipment	5	40,427			33,753
Office furniture and equipment	7	1,081			775
Leasehold improvements	*	5,180			4,477
Construction in progress		1,544			3,831
		54,622			48,007
Less accumulated depreciation and amortization		(31,500		)	(25,136		)
		$	23,122		$	22,871

*    Leasehold improvements are amortized over the estimated life of the asset or remaining term of the lease, whichever is shorter.

Depreciation and amortization expense was $6,589, $4,579, and $3,980 for the years ended December 28, 2013, December 29, 2012, and December 31, 2011, respectively.

Accrued liabilities consisted of the following:

	December 28, 2013		December 29, 2012
Accrued inventory purchases	$	1,717	$	1,125
Accrued inventory repurchase obligation	6,510		6,900
Accrued other	3,602		4,647
	$	11,829	$	12,672

Accrued inventory repurchase obligation represents raw materials sold to suppliers for processing. These raw

materials remain part of the Company’s total inventory and the transactions include only customary terms and conditions, such

as shipping and payment terms.

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Net Revenue by Geographic Region (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Geographic Reporting Disclosure [Line Items]
Net revenue	$ 43,324	$ 60,002	$ 52,365	$ 46,625	$ 62,999	$ 60,575	$ 43,639	$ 36,695	$ 202,316	$ 203,908	$ 107,771
Percentage of net revenue									100.00%	100.00%	100.00%
UNITED STATES
Geographic Reporting Disclosure [Line Items]
Net revenue									35,089	34,489	31,921
Percentage of net revenue									17.00%	17.00%	30.00%
JAPAN
Geographic Reporting Disclosure [Line Items]
Net revenue									142,389	147,458	52,062
Percentage of net revenue									71.00%	72.00%	48.00%
Other Countries
Geographic Reporting Disclosure [Line Items]
Net revenue									$ 24,838	$ 21,961	$ 23,788
Percentage of net revenue									12.00%	11.00%	22.00%

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Commitments and Contingencies (Tables)

12 Months Ended

Dec. 28, 2013

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

Annual future minimum obligations under operating leases and licensing agreements as of December 28, 2013, are as follows:

Fiscal years:
2014	$	2,428
2015	1,366
2016	51
Total minimum lease payments	$	3,845

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Financial Instruments - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified			12 Months Ended
	Dec. 28, 2013 Investment	Dec. 29, 2012	Dec. 28, 2013 Minimum	Dec. 28, 2013 Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long term marketable securities maturity period			1 year	2 years
Number of investments in marketable securities under unrealized loss position	39
Fair value of Investments in marketable securities in unrealized loss position for less than 12 months	$ 23,361
Unrealized Losses	$ 17	$ 9

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Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 28, 2013

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data (Unaudited)

Quarterly Financial Data (Unaudited)

The following table presents our unaudited quarterly financial data. In our opinion, this information has been prepared on a basis consistent with that of our audited consolidated financial statements and all necessary material adjustments, consisting of normal recurring accruals and adjustments, have been included to present fairly the unaudited quarterly financial data. Our quarterly results of operations for these periods are not necessarily indicative of future results of operations.

	Net Revenue		Gross Profit		Net Income (Loss)			Diluted  Net Income (Loss) Per Share *
Year Ended December 28, 2013
Fourth Quarter	$	43,324	$	15,607	$	(6,828	)	$	(0.21	)
Third Quarter	60,002		25,253		4,433			0.12
Second Quarter	52,365		20,719		(448		)	(0.01		)
First Quarter	46,625		19,817		(1,208		)	(0.04		)
Total	$	202,316	$	81,396	$	(4,051	)
Year Ended December 29, 2012
Fourth Quarter	$	62,999	$	27,282	$	5,627		$	0.15
Third Quarter	60,575		25,015		4,713			0.10
Second Quarter	43,639		16,241		(26		)	(0.01		)
First Quarter	36,695		11,235		(3,042		)	(1.10		)
Total	$	203,908	$	79,773	$	7,272

*    The sum of the four quarters may not agree to the year total due to rounding within a quarter or the inclusion or exclusion of common stock equivalents in certain periods.