10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)

x QUARTERLY REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2012.

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 1-34020

MICREL, INCORPORATED

(Exact name of Registrant as specified in its charter)

California	94-2526744
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

2180 Fortune Drive, San Jose, CA	95131
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (408) 944-0800

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

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

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

Large accelerated filer	¨	Accelerated filer	x
Non-accelerated filer	¨	Smaller reporting company	¨

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

As of August 1, 2012 there were 59,478,974 shares of common stock, no par value, outstanding.

MICREL, INCORPORATED

INDEX TO

REPORT ON FORM 10-Q

FOR THE QUARTERLY PERIOD ENDED JUNE 30, 2012

		Page
	PART I. FINANCIAL INFORMATION
Item 1.	Financial Statements (Unaudited):
	Condensed Consolidated Balance Sheets - at June 30, 2012 and at December 31, 2011		3
	Condensed Consolidated Statements of Operations - Three and Six Months Ended June 30, 2012 and 2011		4
	Condensed Consolidated Statements of Comprehensive Income - Three and Six Months Ended June 30, 2012 and 2011		5
	Condensed Consolidated Statements of Cash Flows - Six Months Ended June 30, 2012 and 2011		6
	Notes to Condensed Consolidated Financial Statements		7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		20
Item 3.	Quantitative and Qualitative Disclosures about Market Risk		33
Item 4.	Controls and Procedures		33
	PART II. OTHER INFORMATION
Item 1.	Legal Proceedings		34
Item 1A.	Risk Factors		34
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds		42
Item 5.	Other Information		43
Item 6.	Exhibits		44
	Signature		45

2

ITEM 1. FINANCIAL STATEMENTS

MICREL, INCORPORATED

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

(In thousands, except share amounts)

	June 30, 2012			December 31, 2011
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	36,073		$	60,610
Short-term investments		83,357			77,265
Accounts receivable, less allowances: 2012, $1,444; 2011, $1,294		31,067			25,385
Inventories		37,704			36,286
Income taxes receivable		—			6,881
Prepaid expenses and other		1,987			2,883
Deferred income taxes		23,161			22,854
Total current assets		213,349			232,164
LONG-TERM INVESTMENTS		6,780			6,857
PROPERTY, PLANT AND EQUIPMENT, NET		60,927			60,884
GOODWILL		6,088			—
INTANGIBLE ASSETS, NET		8,455			—
DEFERRED INCOME TAXES		10,009			8,657
OTHER ASSETS		2,510			1,413
TOTAL	$	308,118		$	309,975
LIABILITIES AND SHAREHOLDERS’ EQUITY
CURRENT LIABILITIES:
Accounts payable	$	16,293		$	17,096
Deferred income on shipments to distributors		30,766			30,671
Other current liabilities		9,265			9,329
Total current liabilities		56,324			57,096
LONG-TERM INCOME TAXES PAYABLE		6,471			6,450
LONG-TERM DEFERRED INCOME TAXES		890			—
Total liabilities		63,685			63,546
COMMITMENTS AND CONTINGENCIES (Note 14)
MICREL, INCORPORATED SHAREHOLDERS’ EQUITY:
Preferred stock, no par value - authorized: 5,000,000 shares; issued and outstanding: none		—			—
Common stock, no par value - authorized: 250,000,000 shares; issued and outstanding: 2012 -59,808,482 shares; 2011 - 61,038,507 shares		—			206
Accumulated other comprehensive loss		(783	)		(887	)
Retained earnings		244,235			247,110
Total Micrel, Incorporated shareholders’ equity		243,452			246,429
NONCONTROLLING INTEREST		981			—
Total shareholders’ equity		244,433			246,429
TOTAL	$	308,118		$	309,975

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

3

MICREL, INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited)

(In thousands, except per share amounts)

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
NET REVENUES	$	63,699		$	68,510		$	124,850		$	136,004
COST OF REVENUES (1)		28,565			28,585			56,540			58,230
GROSS PROFIT		35,134			39,925			68,310			77,774
OPERATING EXPENSES:
Research and development (1)		13,920			12,231			27,244			24,752
Selling, general and administrative (1)		12,179			11,672			23,339			23,763
Total operating expenses		26,099			23,903			50,583			48,515
INCOME FROM OPERATIONS		9,035			16,022			17,727			29,259
OTHER INCOME (EXPENSE):
Interest income		187			177			388			367
Interest expense		(42	)		(2	)		(47	)		(18	)
Other income (expense), net		(123	)		36			(123	)		75
Total other income, net		22			211			218			424
INCOME BEFORE INCOME TAXES AND NONCONTROLLING INTEREST		9,057			16,233			17,945			29,683
PROVISION FOR INCOME TAXES		3,026			5,512			6,498			9,897
NET INCOME		6,031			10,721			11,447			19,786
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTEREST		(4	)		—			(4	)		—
NET INCOME ATTRIBUTABLE TO MICREL, INCORPORATED SHAREHOLDERS	$	6,027		$	10,721		$	11,443		$	19,786
NET INCOME PER SHARE ATTRIBUTABLE TO MICREL, INCORPORATED SHAREHOLDERS:
Basic	$	0.10		$	0.17		$	0.19		$	0.32
Diluted	$	0.10		$	0.17		$	0.19		$	0.31
CASH DIVIDENDS DECLARED PER SHARE	$	0.040		$	0.035		$	0.080		$	0.070
WEIGHTED AVERAGE SHARES USED IN COMPUTING PER SHARE AMOUNTS:
Basic		60,217			62,167			60,533			62,007
Diluted		60,837			63,027			61,219			63,057
(1)    Share-based compensation expense included in:
Cost of revenues	$	282		$	284		$	566		$	526
Research and development		812			525			1,557			1,051
Selling, general and administrative		815			503			1,568			1,108

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

4

MICREL, INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

(In thousands)

	Three Months Ended June 30,					Six Months Ended June 30,
	2012			2011		2012			2011
NET INCOME	$	6,031		$	10,721	$	11,447		$	19,786
Other comprehensive income:
Unrealized gains on investments		109			590		169			651
Income tax expense related to unrealized gains on investments		42			231		65			255
Other comprehensive income, net of tax		67			359		104			396
COMPREHENSIVE INCOME		6,098			11,080		11,551			20,182
Less: comprehensive income attributable to the noncontrolling interest		(4	)		—		(4	)		—
COMPREHENSIVE INCOME ATTRIBUTABLE TO MICREL, INCORPORATED SHAREHOLDERS	$	6,094		$	11,080	$	11,547		$	20,182

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

5

MICREL, INCORPORATED

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

(In thousands)

	Six Months Ended June 30,
	2012			2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$	11,447		$	19,786
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		6,050			6,295
Share-based compensation expense		3,691			2,685
Excess tax benefits from stock-based awards		(40	)		(463	)
Loss on disposal of assets		1			—
Deferred income tax provision		(1,737	)		2,067
Changes in operating assets and liabilities:
Accounts receivable		(4,563	)		(2,911	)
Inventories		(95	)		(1,548	)
Income taxes receivable		6,912			5,057
Prepaid expenses and other assets		(8	)		479
Accounts payable		(1,125	)		(4,460	)
Income taxes payable		553			759
Other current liabilities		(933	)		673
Deferred income on shipments to distributors		95			(913	)
Net cash provided by operating activities		20,248			27,506
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of PhaseLink’s net assets, net of cash acquired		(16,439	)		—
Purchases of property, plant and equipment		(4,085	)		(4,818	)
Purchases of investments		(30,596	)		(23,939	)
Proceeds from sale and maturities of investments		24,818			27,045
Net cash provided by (used in) investing activities		(26,302	)		(1,712	)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of debt		(282	)		(2,857	)
Proceeds from the issuance of common stock		1,473			10,858
Repurchases of common stock		(14,694	)		(7,228	)
Payment of cash dividends		(4,905	)		(4,350	)
Purchase of stock for withholding taxes on vested restricted stock		(115	)		—
Excess tax benefits from stock-based awards		40			463
Net cash used in financing activities		(18,483	)		(3,114	)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		(24,537	)		22,680
CASH AND CASH EQUIVALENTS - Beginning of period		60,610			74,738
CASH AND CASH EQUIVALENTS - End of period	$	36,073		$	97,418

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

6

MICREL, INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. SIGNIFICANT ACCOUNTING POLICIES

Interim Financial Information - The accompanying condensed consolidated financial statements of Micrel, Incorporated and its wholly-owned and majority-owned subsidiaries (together “Micrel” or the “Company”) as of June 30, 2012 and for the three and six months ended June 30, 2012 and 2011 are unaudited. In the opinion of management, the condensed consolidated financial statements include all adjustments (consisting only of normal recurring accruals) that management considers necessary for a fair statement of its financial position, operating results, comprehensive income and cash flows for the interim periods presented. Operating results and cash flows for interim periods are not necessarily indicative of results for the entire year. The Condensed Consolidated Balance Sheet as of December 31, 2011, was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted (“GAAP”) in the United States of America. These financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011. These financial statements should also be read in conjunction with the Company’s critical accounting policies included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011 and those included in this Form 10-Q below.

Net Income Per Common and Equivalent Share - Basic net income per share is computed by dividing net income attributable to Micrel, Incorporated shareholders by the number of weighted-average common shares outstanding. Diluted net income per share reflects potential dilution from outstanding stock options using the treasury stock method. Reconciliation of weighted-average shares used in computing net income per share attributable to Micrel, Incorporated shareholders is as follows (in thousands):

	Three Months Ended June  30,				Six Months Ended June 30,
	2012		2011		2012		2011
Weighted average common shares outstanding		60,217		62,167		60,533		62,007
Dilutive effect of stock options outstanding using the treasury stock method		620		860		686		1,050
Shares used in computing diluted net income per share attributable to Micrel, Incorporated shareholders		60,837		63,027		61,219		63,057

For the three and six months ended June 30, 2012, 5.5 million stock options and 5.3 million stock options, respectively, have been excluded from the weighted-average number of common shares outstanding for the diluted net income per share computations as they were anti-dilutive. For the three and six months ended June 30, 2011, 3.6 million stock options and 2.9 million stock options, respectively, have been excluded from the weighted-average number of common shares outstanding for the diluted net income per share computations as they were anti-dilutive.

2. RECENTLY ISSUED ACCOUNTING STANDARDS

There have been no developments to recently issued accounting standards, including the expected dates of adoption and estimated effects on the Company’s consolidated financial statements, from those disclosed in the Company’s 2011 Annual Report on Form 10-K.

Effective January 1, 2012, the Company adopted the new accounting standard on fair value measurements that clarifies the application of existing guidance and disclosure requirements, changes certain fair value measurement principles and requires additional disclosures about fair value measurements. The adoption did not have an impact on the Company’s consolidated financial position or results of operations.

7

MICREL, INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Effective January 1, 2012, the Company adopted the new standard that requires the presentation of comprehensive income, the components of net income and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. The new standard also requires presentation of adjustments for items that are reclassified from other comprehensive income to net income in the statement where the components of net income and the components of other comprehensive income are presented. In December 2011, an amendment was issued that defers the requirement to present reclassification adjustments out of accumulated other comprehensive income on the face of the consolidated statement of income. The adoption concerns presentation and disclosure only and did not have an impact on the Company’s consolidated financial position or results of operations.

3. ACQUISITION

On March 15, 2012, the Company signed a definite agreement to acquire a controlling interest in PhaseLink^TM Company Limited (“PhaseLink”), a private company based in Taiwan and in San Jose, California. The acquisition was completed on April 2, 2012. The Company acquired approximately 95% of the outstanding shares of PhaseLink for $19.7 million in cash ($16.4 million net of cash acquired). The objective of the acquisition is to complement Micrel’s high performance clock generation, distribution products for the communication market and to expand its product offerings into the consumer and industrial markets. In addition, the Company expects the acquisition to enhance its technology portfolio and further expand its research and development capabilities. The Company has included the financial results of PhaseLink in its condensed consolidated financial statements beginning on the acquisition date. Pro forma financial disclosures are not presented herein as the financial results of this acquisition are considered immaterial.

Recognized amounts of identifiable assets acquired and liabilities assumed

The Company accounted for the transaction using the acquisition method and, accordingly, the consideration has been allocated to the tangible and intangible assets acquired and liabilities assumed on the basis of their respective estimated fair values on the acquisition date. For the three months ended June 30, 2012, acquisition costs of $82,000 were expensed as incurred. The Company’s allocation of the total purchase price is summarized below (in thousands):

Cash and cash equivalents	$	3,255
Accounts receivable		1,119
Inventories		1,320
Other assets		273
Property, plant and equipment		1,734
Developed technology		4,400
Customer relationships		3,000
Trademarks		510
Non-competition agreements		410
In-process research and development		410
Goodwill		6,088
Short-term debt		(282	)
Other liabilities		(1,566	)
Noncontrolling interest		(977	)
Total purchase consideration	$	19,694

8

MICREL, INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Identifiable intangible assets

Fair values for the acquired developed technology, customer relationships, trademarks and non-competition agreements and in-process research and development (“IPR&D”) were determined based on various methods including excess earnings method, relief from royalty method and with-or-without method. The values of the developed technology and customer relationships will be amortized over an estimated useful life of 10 years. The non-competition agreements will be amortized over a two-year period. The values of trademarks will be amortized over two to five years.

The fair value of the acquired IPR&D was determined through estimates and valuation techniques based on the terms and details of the acquisition. As it was determined that the underlying projects had not reached technological feasibility at the date of acquisition, the amounts allocated to IPR&D will not be expensed until completion of the related projects. Upon the completion of development for each project, the acquired IPR&D will be amortized over its useful life.

The following table summarizes the identifiable intangible assets acquired as part of the acquisition (in thousands):

	Fair Value as of Acquisition Date April 2, 2012		Accumulated Amortization as of June 30, 2012			Net Carrying Amount as of June 30, 2012
Developed technology	$	4,400	$	(110	)	$	4,290
Customer relationships		3,000		(75	)		2,925
Trademarks		510		(38	)		472
Non-competition agreements		410		(52	)		358
In-process research and development		410		—			410
Total	$	8,730	$	(275	)	$	8,455

Goodwill

Goodwill represents the excess of the estimated acquisition consideration over the fair value of the underlying net tangible and intangible assets. The Company’s primary reasons for the PhaseLink acquisition were to complement Micrel’s high performance clock generation, distribution products for the communication market and to expand its product offerings into the consumer and industrial markets. The Company also expects the acquisition to reduce the time to develop new technologies and to provide more complete solutions for communications, consumer and industrial markets. The acquisition also enhanced the Company’s engineering resources through the addition of PhaseLink’s research and development team. These significant factors were the basis for the recognition of goodwill. The goodwill is not expected to be deductible for tax purposes.

4. SHARE-BASED COMPENSATION

Share-based compensation is measured at the grant date, based on the fair value of the award and is recognized over the employee’s requisite service period. For further details regarding the Company’s share-based compensation arrangements, refer to Note 7 of Notes to Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011. The following table summarizes total share-based compensation expense included in the Condensed Consolidated Statement of Operations (in thousands):

9

MICREL, INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Cost of revenues	$	282		$	284		$	566		$	526
Research and development		812			525			1,557			1,051
Selling, general and administrative		815			503			1,568			1,108
Pre-tax share-based compensation expense		1,909			1,312			3,691			2,685
Less income tax effect		(679	)		(449	)		(1,305	)		(992	)
Net share-based compensation expense	$	1,230		$	863		$	2,386		$	1,693

During the three months ended June 30, 2012 and 2011, the Company granted 645,400 and 749,471 stock options, respectively, at weighted average fair values of $2.92 and $4.65 per share, respectively. For the six months ended June 30, 2012 and 2011, the Company granted 783,820 and 1,802,371 stock options, respectively, at weighted average fair values of $2.95 and $5.37 per share, respectively. The fair value of the Company’s stock options granted under the Company’s option plans was estimated at the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions:

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Expected term (years)		5.8			5.6			5.8			5.7
Stock volatility		35.9	%		39.8	%		36.2	%		40.1	%
Risk free interest rates		0.9	%		2.0	%		1.1	%		2.2	%
Dividends during expected terms		1.7	%		1.3	%		1.6	%		1.2	%

As of June 30, 2012, there was $17.0 million of total unrecognized share-based compensation related to non-vested stock option awards which is expected to be recognized over a weighted-average period of 4.4 years. Total share-based compensation capitalized as part of inventory as of June 30, 2012 and December 31, 2011 was $177,000 and $174,000, respectively.

The Company also grants Restricted Stock Units (“RSU”s) to its employees. In the three months ended June 30, 2012 and 2011, the Company granted 211,086 and 67,153 RSUs, respectively, at weighted average fair values of $9.73 and $10.91, respectively. During the six months ended June 30, 2012 and 2011, the Company granted 256,086 and 162,153 RSUs, respectively, at weighted average fair values of $9.76 and $11.85, respectively.

Under the Company’s Employee Stock Purchase Plan (“ESPP”), eligible employees are permitted to have salary withholdings to purchase shares of Common Stock at a price equal to 95% of the market value of the stock at the end of each three-month offer period, subject to an annual limitation. The ESPP is considered non-compensatory per current share-based compensation accounting guidelines.

5. INVESTMENTS

Investments purchased with remaining maturity dates of greater than three months and less than 12 months are classified as short-term. Investments purchased with remaining maturity dates of 12 months or greater are classified either as short-term or as long-term based on maturities and the Company’s intent with regard to those securities (expectations of sales and redemptions). Short-term investments as of June 30, 2012 primarily consisted of corporate debt instruments, certificate of deposits and liquid municipals and were classified as available-for-sale securities. Long-term investments as of June 30, 2012 consisted of auction rate notes secured by student loans and were classified as available-for-sale securities. Available-for sale securities are stated at market value with unrealized gains and losses included in accumulated other comprehensive income. Unrealized losses are charged against income when a decline in the fair market value of an individual security is determined to be other than temporary. Realized gains and losses on investments are included in other income or expense. A summary of the Company’s short-term investments at June 30, 2012 and December 31, 2011 is as follows (in thousands):

10

MICREL, INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

	As of June 30, 2012									As of December 31, 2011
	Cost		Gross Gains		Gross Losses			Fair Value		Cost		Gross Gains		Gross Losses			Fair Value
Municipal Securities	$	13,123		—	$	(76	)	$	13,047	$	11,413		—	$	(115	)	$	11,298
Corporate Debt Securities		33,418		—		(206	)		33,212		33,723		—		(327	)		33,396
Commercial Paper		9,468		—		(7	)		9,461		4,991		—		(2	)		4,989
U.S. Agencies		4,523		—		(21	)		4,502		4,528		—		(17	)		4,511
Certificates of Deposits		23,135		—		—			23,135		23,071		—		—			23,071
Total	$	83,667	$	—	$	(310	)	$	83,357	$	77,726	$	—	$	(461	)	$	77,265

As of June 30, 2012, $52.9 million of the Company’s short-term investments were in an unrealized loss position. The Company recorded a $0.2 million net of tax ($0.3 million pre-tax) for temporary impairment of these securities to accumulated other comprehensive income, a component of shareholders’ equity.

To determine the fair value of financial instruments, the Company uses a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (level 1 measurements) and the lowest priority to unobservable inputs (level 3 measurements). The three levels of the fair value hierarchy are described below:

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

• Level 2 - Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

• Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Most of the Company’s financial instruments are classified within Level 1 or Level 2 of the fair value hierarchy because they are valued using quoted market prices, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency.

The types of instruments valued based on quoted market prices in active markets include money market funds and commercial paper. Such instruments are classified within Level 1 of the fair value hierarchy. The types of instruments valued based on other observable inputs include U.S. agency securities. Such instruments are classified within Level 2 of the fair value hierarchy. The types of instruments valued based on unobservable inputs include the auction rate securities held by the Company. Such instruments are generally classified within Level 3 of the fair value hierarchy. The Company estimated the fair value of these auction rate securities using a discounted cash flow model incorporating assumptions that market participants would use in their estimates of fair value. Some of these assumptions include estimates for interest rates, timing and amount of cash flows and expected holding periods of the auction rate securities.

11

MICREL, INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Financial assets measured at fair value on a recurring basis as of June 30, 2012 were as follows (in thousands):

	Quoted Prices in Active Markets for Identical Assets Level 1		Significant Other Observable Inputs Level 2		Significant Unobservable Inputs Level 3		Total
Money Market Funds	$	24,441		—		—	$	24,441
Certificates of Deposits		23,135		—		—		23,135
Corporate Debt Securities		—		33,212		—		33,212
Commercial Paper		—		9,461		—		9,461
Municipal Securities		—		13,047		—		13,047
U.S. Agencies		—		4,502		—		4,502
Auction rate notes		—		—		6,780		6,780
Total	$	47,576	$	60,222	$	6,780	$	114,578

Financial assets measured at fair value on a recurring basis as of December 31, 2011 were as follows (in thousands):

	Quoted Prices in Active Markets for Identical Assets Level 1		Significant Other Observable Inputs Level 2		Significant Unobservable Inputs Level 3		Total
Money Market Funds	$	55,912		—		—	$	55,912
Certificates of Deposits		23,071		—		—		23,071
Corporate Debt Securities		—		33,396		—		33,396
Commercial Paper		—		4,990		—		4,990
Municipal Securities		—		11,297		—		11,297
U.S. Agencies		—		4,511		—		4,511
Auction rate notes		—		—		6,857		6,857
Total	$	78,983	$	54,194	$	6,857	$	140,034

As of June 30, 2012, the Company had $7.7 million of auction rate notes, the fair value of which has been measured using Level 3 inputs. Auction rate notes are securities that are structured with short-term interest rate reset dates of generally less than ninety days, but with contractual maturities that can be in excess of ten years. At the end of each reset period, which occurs every seven or twenty eight days for the securities held by the Company, investors can sell or continue to hold the securities at par. As a result of sell orders exceeding buy orders, auctions for the student loan-backed notes held by the Company have failed as of June 30, 2012. To date the Company has collected all interest payable on all of its auction-rate securities when due and expects to continue to do so in the future. The principal associated with failed auctions will not be accessible until a successful auction occurs, a buyer is found outside of the auction process, the issuers redeem the securities, the issuers repay principal over time from cash flows prior to final maturity or final payments come due according to contractual maturities ranging from 20 to 35 years. As a result, the Company has classified all auction rate notes as long-term investments as of June 30, 2012 and December 31, 2011. In the event of a failed auction, the notes bear interest at a predetermined maximum rate based on the credit rating of notes as determined by one or more nationally recognized statistical rating organizations. For the auction rate notes held by the Company as of June 30, 2012 and December 31, 2011, the maximum interest rate is generally one month LIBOR plus 1.5% based on the notes’ rating as of that date.

The Company has used a combination of discounted cash flow models and observable transactions for similar securities to determine the estimated fair value of its investment in auction rate notes as of June 30, 2012 and December 31, 2011. The assumptions used in preparing the discounted cash flow model include estimates for interest rates, estimates for discount rates using yields of comparable traded instruments adjusted for illiquidity and other risk factors, amount of cash flows and expected holding periods of the auction rate notes. Based on this assessment of fair value, as of June 30, 2012, the Company determined there was a cumulative decline in the fair value of its auction rate notes and recorded a $0.6 million net of tax ($0.9 million pre-tax) temporary impairment of these securities to accumulated other comprehensive income, a component of shareholders’ equity.

12

MICREL, INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

For the six months ended June 30, 2012, the changes in the Company’s Level 3 securities (consisting of auction rate notes) were as follows (in thousands):

	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Beginning balance, December 31, 2011	$	6,857
Transfers in and/or out of Level 3		—
Total gains, before tax		23
Settlements		(100	)
Ending balance, June 30, 2012	$	6,780

6. INVENTORIES

Inventories consisted of the following (in thousands):

	June  30, 2012		December  31, 2011
Finished goods	$	8,522	$	11,824
Work in process		27,855		22,863
Raw materials		1,327		1,599
Total inventories	$	37,704	$	36,286

7. PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consisted of the following (in thousands):

	June 30, 2012			December 31, 2011
Manufacturing equipment	$	174,041		$	170,304
Land		8,101			8,101
Buildings and improvements		53,790			53,539
Office furniture and research equipment		19,663			17,834
		255,595			249,778
Accumulated depreciation		(194,668	)		(188,894	)
Total property, plant and equipment, net	$	60,927		$	60,884

Depreciation expense for the three and six months ended June 30, 2012 was $3.1 million and $5.8 million, respectively.

13

MICREL, INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

8. GOODWILL AND INTANGIBLE ASSESTS

Goodwill represents the excess of the purchase price paid over the fair value of tangible and identifiable intangible net assets acquired in a business combination. On April 2, 2012, the Company acquired PhaseLink and recorded approximately $6.1 million of goodwill as the purchase price exceeded the fair value allocated to net tangible assets and identifiable intangible assets. The goodwill will be reviewed annually on October 1^stor whenever events or circumstances occur which indicate that goodwill might be impaired.

The Company’s annual goodwill impairment assessment will include first performing a qualitative assessment. As part of this assessment, the Company will consider the trading value of the Company’s stock and the implied value of the Company as compared to the Company’s net assets as well as the valuation of PhaseLink and will determine whether it is not more likely than not that the fair value is less than the carrying values of the Company’s reporting unit before proceeding to the Step 1 of the goodwill impairment test. If, after assessing the qualitative factors, a company determines that it is not more likely than not that the fair value of a reporting unit is less than its carrying value, then performing the two-step impairment test is unnecessary. However, if a company concludes otherwise, then it is required to perform the first step of the two-step goodwill impairment test. The first step requires a comparison of the fair value of the Company’s reporting unit to its net book value. If the fair value is greater, then no impairment is deemed to have occurred. If the fair value is less, then the second step must be performed to determine the amount, if any, of actual impairment.

The process of evaluating the potential impairment of long-lived assets is highly subjective and requires significant judgment. In estimating the fair value of these assets, the Company makes estimates and judgments about future revenues and cash flows. The Company’s forecasts will be based on assumptions that are consistent with the plans and estimates the Company is using to manage the business. Changes in these estimates could change the Company’s conclusion regarding impairment of the long-lived assets and potentially result in future impairment charges for all or a portion of the followings balances at June 30, 2012 (in thousands).

	Carrying Amount as of March 31, 2012		Additions at Cost April 2, 2012		Carrying Amount as of June 30, 2012		Accumulated Amortization as of June 30, 2012			Net Carrying Amount as of June 30, 2012
Developed technology	$	—	$	4,400	$	4,400	$	(110	)	$	4,290
Customer relationships		—		3,000		3,000		(75	)		2,925
Trademarks		—		510		510		(38	)		472
Non-competition agreements		—		410		410		(52	)		358
In-process research and development		—		410		410		—			410
	$	—	$	8,730	$	8,730	$	(275	)	$	8,455

The above intangible assets continue to be amortized over their estimated useful lives of 2 to 10 years using the straight-line method. Total intangible amortization expense for the three-month periods ended June 30, 2012 was $275,000.

The estimated future amortization expense of intangible assets as of June 30, 2012 was as follows (in thousands):

Year Ending December 31,
2012 (remaining six months)	$	549
2013		1,098
2014		881
2015		808
2016		808
Thereafter		4,311
	$	8,455

14

MICREL, INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

9. OTHER CURRENT LIABILITIES

Other current liabilities consisted of the following (in thousands):

	June 30, 2012		December 31, 2011
Accrued compensation	$	4,195	$	4,997
Accrued commissions		2,321		1,964
Accrued workers compensation and health insurance		981		987
All other current accrued liabilities		1,768		1,381
Total other current liabilities	$	9,265	$	9,329

10. BORROWING ARRANGEMENTS

Under the terms of an unsecured credit facility with Bank of the West, the Company has a $5.0 million line of credit available for general working capital needs, which includes a $5.0 million letter of credit sub-facility including a $2.0 million foreign exchange sub-facility. On April 22, 2011, the expiration date of the line of credit was extended from April 30, 2011 to April 30, 2013. Interest rates under the amended agreement are based on one of three interest rates, at the Company’s option: (1) a variable alternate base rate plus 1.0%, the alternate base rate being the greater of (x) Bank of the West’s prime rate, (y) the Fed Funds Rate plus 0.5% or (z) daily adjusted one-month LIBOR plus 1.0%; (2) floating one-month LIBOR plus 2.0% or (3) fixed LIBOR for one, two, three or six month periods, plus 2.0%. As of June 30, 2012, the Company had no borrowings under the line of credit. The agreement includes certain restrictive covenants and, as of June 30, 2012, the Company was in compliance with such covenants.

The credit facility also included a $15.0 million term loan facility to finance the repurchase of shares of the Company’s common stock. In May 2009, the Company borrowed $15.0 million under the term loan. Interest under the term loan facility was payable at a rate equal to floating one-month LIBOR plus 2.25%. Borrowings were payable over 21 equal monthly installments, which commenced on August 31, 2009. The final payment was made on April 30, 2011.

Through the PhaseLink acquisition, the Company acquired two term loans totaling $282,000 with a local bank in Taiwan. The Company paid off the acquired bank loans in full in June 2012.

11. DERIVATIVE FINANCIAL INSTRUMENTS

The Company entered into an interest rate swap contract (the “Swap”) back in 2009 to partially offset its exposure to the effects of changes in interest rates on its variable-rate financing obligations. The Swap was considered a cash flow hedge. The Company does not hold derivative financial instruments for trading or speculative purposes. The Swap matured in April 2011 and was not renewed. As of June 30, 2012, there was no Swap outstanding.

For derivative instruments that are designated and qualify as a cash flow hedge, the effective portion of the gain or loss on the derivative is reported as a component of other comprehensive income and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. Gains and losses on the derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings.

15

MICREL, INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

All derivatives are recorded at fair value in either prepaid and other current assets or other accrued liabilities. The Company reports cash flows from derivative instruments in cash flows from operating activities. As of June 30, 2012, there was no notional amount of the outstanding Swap. The effect of derivative instruments on the Statement of Operations for the three and six months ended June 30, 2012 and 2011 was not material.

12. SIGNIFICANT CUSTOMERS

During the six months ended June 30, 2012, two worldwide distributors and one OEM accounted for $31.5 million (25%), $20.8 million (17%) and $13.3 million (11%) of net revenues, respectively. During the six months ended June 30, 2011, two worldwide distributors, accounted for $28.7 million (21%) and $24.0 million (18%) of net revenues, respectively.

At June 30, 2012, two worldwide distributors accounted for 30%, and 13%, respectively, of total accounts receivable. At December 31, 2011, two world-wide distributors and an Asian based distributor accounted for 23%, 10% and 11%, respectively, of total accounts receivable.

13. SEGMENT REPORTING

Operating segments are identified as components of an enterprise about which separate discrete financial information is available for evaluation by the chief operating decision maker. The Company has two reportable segments: standard products and other products, which consist primarily of custom and foundry products and revenues from the license of patents. The chief operating decision maker evaluates segment performance based on revenue. Accordingly, all expenses are considered corporate level activities and are not allocated to segments. Therefore, it is not practical to show profit or loss by reportable segments. Also, the chief operating decision maker does not assign assets to these segments. Consequently, it is not relevant to show assets by reportable segments.

Net Revenues by Segment	Three Months Ended June 30,						Six Months Ended June 30,
(dollars in thousands)	2012			2011			2012			2011
Net Revenues:
Standard Products	$	61,204		$	65,808		$	120,003		$	131,379
Other Products		2,495			2,702			4,847			4,625
Total net revenues	$	63,699		$	68,510		$	124,850		$	136,004
As a Percentage of Total Net Revenues:
Standard Products		96	%		96	%		96	%		97	%
Other Products		4			4			4			3
Total net revenues		100	%		100	%		100	%		100	%

16

MICREL, INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

14. LITIGATION AND COMMITMENTS AND CONTINGENCIES

On November 1, 2008, Nadatel Co., Ltd. (“Nadatel”), a video surveillance equipment supplier based in Seoul Korea, filed a complaint against the Company for product liability and tort-based damages with the Seoul Central District Court in Seoul, Korea. In 2006 and 2007, Nadatel purchased approximately 17,000 of the Company’s low-dropout voltage regulators for use in its closed circuit television digital video recorder application for security systems. Nadatel claimed that the parts failed in the field, resulting in malfunction of its application, recall of the application and replacement of circuit boards incorporating the Company’s part. The Company settled this claim in June 2012 pursuant to a court-mediated agreement without admitting to liability or product defects. Despite the Company’s assessment that the claims asserted by Nadatel are untrue, it settled this protracted litigation in order to avoid further legal expense and distraction. The settlement amount of approximately $200,000 was recorded as a component of selling, general and administrative expenses for the three and six months ended June 30, 2012.

Additional claims have been filed by or have arisen against the Company in its normal course of business. Generally, litigation is subject to inherent uncertainties, and no assurance can be given that the Company will prevail in any particular lawsuit. Accordingly, pending lawsuits, as well as potential future litigation with other companies, could result in substantial costs and diversion of resources and could have a material adverse effect on the Company’s financial condition, results of operations or cash flows. However, the Company believes that the ultimate resolution of outstanding claims and lawsuits will not have a material adverse effect on the Company’s financial condition, results of operations or cash flows.

15. SHARE REPURCHASE PROGRAM

In February 2010, the Company’s Board of Directors approved a $15.0 million share repurchase program for calendar year 2010. In September 2010, the Company’s Board of Directors approved an increase to the amount authorized for repurchase from $15.0 million to $30.0 million. In November 2010, the Company’s Board of Directors approved an extension of the termination of the authorized repurchase plan from December 31, 2010 to the date on which the total authorized aggregate amount is expended. In May 2011, the Company’s Board of Directors authorized the repurchase of an additional $30.0 million of the Company’s common stock. The shares authorized for purchase under the new plan are in addition to the shares that may yet be purchased under the 2010 plan, which increased the total available for repurchase, as of June 30, 2012, to $9.0 million. On July 26, 2012, the Company announced that its Board of Directors has authorized the repurchase of an additional $30.0 million of the Company’s common stock. This new authorization increased the total available for repurchase to $39.0 million.

Shares of common stock purchased pursuant to the repurchase program are cancelled from outstanding shares upon repurchase and credited to an authorized and un-issued reserve account. Repurchased amounts are recorded as a reduction to common stock to the extent available. Any amounts repurchased which are in excess of the existing total common stock balance are recorded as a reduction of retained earnings. Share repurchases are recorded as a reduction to common stock to the extent available. Any amounts repurchased which are in excess of the existing total common stock balance are recorded as a reduction of retained earnings. Share repurchases are intended to reduce the number of outstanding shares of common stock to increase shareholder value and offset dilution from the Company’s stock option plans and ESPP. During the six months ended June 30, 2012, the Company repurchased 1,437,445 shares of its common stock for an aggregate price of $14.7 million.

17

MICREL, INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

16. INCOME TAXES

The income tax provision for the three and six months ended June 30, 2012, as a percentage of income before taxes, was 33.4% and 36.2%, respectively. The tax provision for the six months ended June 30, 2012 included an out-of-period charge of $491,000 related to the write-offs of deferred tax assets associated with the net operating losses of two previously acquired companies. This charge is immaterial for the three and six months ended June 30, 2012 and immaterial to any applicable prior periods that could have been affected. For the three months ended June 30, 2012, the Company also recognized $176,000 of previously unrecognized tax benefits due to settlements with the tax authorities. Additionally, the tax provision for this period excluded any benefits from the federal research and development credit which expired on December 31, 2011 and has not been reinstated as of June 30, 2012. The income tax provision for the three and six months ended June 30, 2011, as a percentage of income before taxes, was 34.0% and 33.3%, respectively.

As of June 30, 2012, the gross liability for uncertain tax positions was $11.9 million (including interest and penalties) and the net liability, reduced for the federal effects of potential state tax exposures, was $8.6 million. If these uncertain tax positions are sustained upon tax authority audit, or otherwise become certain, the net $8.6 million would favorably affect the Company’s tax provision in such future periods. Included in the $8.6 million is $2.1 million which has not yet reduced income tax payments, and therefore, has been netted against non-current deferred tax assets. The remaining $6.5 million liability was included in long-term income taxes payable. The Company does not anticipate a significant change to the $6.5 million long-term uncertain income tax positions within the next 12 months.

The Company continues to recognize interest and penalties related to income tax matters as part of the income tax provision. As of June 30, 2012 and December 31, 2011, the Company had $656,000 and $655,000, respectively, accrued for interest and none accrued for penalties in both periods. These accruals are included as a component of long-term income taxes payable.

The Company is required to file U.S. federal income tax returns as well as income tax returns in various states and foreign jurisdictions. The Company may be subject to examination by the Internal Revenue Service (“IRS”) for calendar years 2008 and forward. Significant state tax jurisdictions include California, Massachusetts and Texas, and generally, the Company is subject to routine examination for years 2005 and forward in these jurisdictions. In addition, any research and development credit carryforwards that were generated in prior years and utilized in these years may also be subject to examination by respective state taxing authorities. Generally, the Company is subject to routine examination for years 2004 and forward in various immaterial foreign tax jurisdictions in which it operates.

Deferred tax assets and liabilities result primarily from temporary differences between book and tax bases of assets and liabilities and state research and development credit carryforwards. The Company had net current deferred tax assets of $23.1 million and net long-term deferred tax assets of $9.1 million as of June 30, 2012. The Company must regularly assess the likelihood that future taxable income levels will be sufficient to ultimately realize the tax benefits of these deferred tax assets. The Company currently believes that future taxable income levels will be sufficient to realize the tax benefits of these deferred tax assets and has not established a valuation allowance except for net operating losses generated in China. Should the Company determine that future realization of these tax benefits is not likely, additional valuation allowance would be established which would increase the Company’s tax provision in the period of such determination.

18

MICREL, INCORPORATED

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

17. DIVIDENDS

On April 26, 2012, the Company’s Board of Directors declared a cash dividend of $0.04 per share outstanding share of common stock. The aggregate payment of $2.5 million was made on May 23, 2012 to shareholders of record as of May 9, 2012.

18. SUBSEQUENT EVENTS

On July 26, 2012, the Company’s Board of Directors declared a cash dividend of $0.04 per outstanding share of common stock payable on August 24, 2012 to shareholders of record at the close of business on August 10, 2012. This dividend will be recorded in the third quarter of 2012 and is expected to be approximately $2.4 million.

On July 26, 2012, the Company announced that its Board of Directors has authorized the repurchase of an additional $30.0 million of the Company’s common stock. This new authorization increased the total available for repurchase under the Company’s repurchase plans to an aggregate of $39.0 million.

19

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Overview

The statements contained in this quarterly report on Form 10-Q that are not purely historical are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), including statements regarding the Company’s expectations, hopes, intentions or strategies regarding the future. Forward-looking statements include, but are not limited to statements regarding: future revenues and dependence on standard products sales and international sales; the levels of international sales; the effect of global market conditions on revenue levels, profitability and results of operations; future products or product development; statements regarding fluctuations in the Company’s results of operations; future returns and price adjustments and allowance; future uncollectible amounts and doubtful accounts allowance; future products or product development; future research and development spending and the Company’s product development strategy; the Company’s markets, product features and performance; product demand and inventory to service such demand; competitive threats and pricing pressure; the effect of dependence on third parties; the Company’s future use and protection of its intellectual property; future expansion or utilization of manufacturing capacity; future expenditures; current or future acquisitions; the ability to meet anticipated short-term and long-term cash requirements and the sources of funds to meet such requirements; effect of changes in market interest rates on investments; the Company’s ability to recover the cost basis on its investments; the Company’s need and ability to attract and retain certain personnel; the cost and outcome of litigation and its effect on the Company; the impact of changes in laws and regulations; the future realization of tax benefits; the amount of future taxable income levels and the resolution of uncertain tax positions; and share-based incentive awards and expectations regarding future stock based compensation expense. In some cases, forward-looking statements can be identified by the use of forward-looking terminology such as, but not limited to, “believe,” “estimate,” “may,” “can,” “will,” “could,” “would,” “should,” “continue,” “intend,” “objective,” “plan,” “expect,” “likely,” “potential,” “possible” or “anticipate” or the negative of these terms or other comparable terminology. All forward-looking statements included in this report are based on information available to the Company on the date of this report, and, except as required by law, the Company assumes no obligation to update any such forward-looking statements. These statements are subject to risks and uncertainties, including those risks discussed under “Risks Factors” and elsewhere in this report, which could cause actual results and events to differ materially from those expressed or implied by such forward-looking statements. Additional factors that may affect operating results are contained within the Company’s Form 10-K for the year ended December 31, 2011.

Micrel designs, develops, manufactures and markets a range of high-performance analog power integrated circuits (“ICs”), mixed-signal ICs and digital ICs. The Company currently ships approximately 3,000 standard products. These products address a wide range of end markets including cellular handsets, portable computing, enterprise and home networking, wide area and metropolitan area networks, digital televisions and industrial equipment. The Company also manufactures custom analog and mixed-signal circuits and provides wafer foundry services for customers that produce electronic systems for communications, consumer and military applications.

The Company’s high performance power management analog products are characterized by high power density and small form factor. The demand for high performance power management circuits has been fueled by the growth of portable communications and computing devices, including for example, cellular handsets, tablet devices and notebook computers. The Company also has an extensive power management offering for the networking and communications infrastructure markets including cloud and enterprise servers, network switches and routers, storage area networks and wireless base stations. In addition, the Company offers products that serve the solid state drive market and is seeing strength in the emergence of solid state drives and analog switches, including USB switches.

20

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The Company’s high bandwidth communications circuits are used primarily for enterprise networks, storage area networks, access networks and metropolitan area networks. This product portfolio consists of timing, clock management and high speed Physical Media Devices (“PMD”) products. With form factor, size reductions, and ease of use critical for system designs, Micrel utilizes innovative packaging and proprietary process technology to address these challenges. On April 2, 2012, the Company acquired a controlling interest of approximately 95% in PhaseLink, a private company based in Taiwan and in San Jose, California. The objective of the acquisition is to complement Micrel’s high performance clock generation and distribution products for the communication market and to expand its product offerings into the consumer and industrial markets. PhaseLink provides high performance integrated timing solutions to system and oscillator manufacturers. The Company’s condensed consolidated financial statements include the operating results of PhaseLink from the date of acquisition. Pro forma financial disclosures are not presented herein as the financial results of this acquisition are considered immaterial.

The Company’s family of Ethernet products targets the digital home, enterprise, industrial and automotive markets. This product portfolio consists of physical layer transceivers (“PHY”), Media Access Controllers (“MAC”), switches, and System-On-Chip (“SoC”) devices that support various Ethernet protocols supporting communication transmission speeds from 10 Megabits per second to a Gigabit per second.

The following table presents the Company’s revenues by product line, as a percentage of total net revenues, for the periods presented.

Net Revenues by Product Line	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
As a Percentage of Total Net Revenues
Analog		57	%		60	%		59	%		61	%
High bandwidth		22			17			19			18
Ethernet		17			19			18			18
Total standard products		96			96			96			97
Foundry, custom and other		4			4			4			3
		100	%		100	%		100	%		100	%

The Company’s products address a wide range of end markets. The following table presents the Company’s revenues by end market as a percentage of total net revenues, for the periods presented.

21

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Net Revenues by End Market	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
As a Percentage of Total Net Revenues
Industrial		43	%		40	%		42	%		42	%
High-speed communications		33			32			32			31
Computer		10			13			10			13
Wireless handsets		12			12			14			11
Military and other		2			3			2			3
Total net revenues		100	%		100	%		100	%		100	%

To enhance the readers’ understanding of the Company’s performance, the following is a chronological overview of the Company’s results for the quarterly periods from January 1, 2011 through June 30, 2012.

During the first quarter of 2011, revenues decreased 10.8% to $67.5 million from $75.6 million in the fourth quarter of 2010. This larger than normal seasonal decline in revenue from the fourth quarter of 2010 was mainly due to a larger than expected reduction in sales to a Korean wireless handset and consumer electronic device manufacturer which moderated product deliveries during the quarter to control its inventory levels. The Company also experienced a reduction in overall demand towards the end of the first quarter of 2011 related to disruptions in the worldwide electronics supply chain as a result of the earthquake and tsunami in Japan. In addition, the first quarter 2011 revenues were impacted by reduced shipments to certain Asian based stocking representative channel partners that reduced their inventory levels during the quarter. As compared to the same period last year, first quarter 2011 revenues increased by $0.3 million. First quarter 2011 book-to-bill ratio was below one, but showed improvement compared to the fourth quarter of 2010. First quarter 2011 gross margin was 56.1%, as compared to 55.8% in the fourth quarter of 2010. Despite the lower revenues, first quarter 2011 gross margin increased from the previous quarter primarily due to a larger proportion of higher margin products. Net income for the first quarter of 2011 was $9.1 million, or $0.15 per basic share and $0.14 per diluted share, as compared to net income of $13.7 million, or $0.22 per basic and diluted share, for the fourth quarter of 2010, and net income of $9.7 million, or $0.16 per basic and diluted share, for the first quarter of 2010. During the first quarter of 2011, cash flows from operations were $15.5 million. During the first quarter of 2011, cash and short-term investments increased by $12.4 million to $121.6 million. In addition to maintaining its quarterly $0.035 per share cash dividend, during the first quarter of 2011 the Company repurchased $5.8 million of its common stock.

During the second quarter of 2011, revenues increased 1.5% to $68.5 million from $67.5 million in the first quarter of 2011. This increase resulted primarily from increased demand in the high-speed communications end market as well as a resumption of more normal shipment levels to a Korean wireless handset and consumer electronic device manufacturer which had moderated product deliveries during the previous quarter. The sequential increase in revenues was less than expected primarily due to lower than expected demand in the industrial end market. The second quarter 2011 book-to-bill ratio was above one for the first time since the second quarter of 2010. Second quarter 2011 gross margin increased to 58.3% as compared to 56.1% in the first quarter of 2011 primarily due to a larger proportion of higher margin products combined with decreased excess inventory charges. Net income for the second quarter of 2011 was $10.7 million, or $0.17 per basic and diluted share, as compared to net income of $9.1 million, or $0.15 per basic share and $0.14 per diluted share, for the first quarter of 2011, and net income of $12.4 million, or $0.20 per basic and

22

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

diluted share, for the second quarter of 2010. During the second quarter of 2011, cash flows from operations were $12.4 million. During the second quarter of 2011, cash and short-term investments increased by $10.7 million to $132.3 million. In addition to maintaining its quarterly $0.035 per share cash dividend, during the second quarter of 2011 the Company repurchased $1.4 million of its common stock.

During the third quarter of 2011, revenues decreased 6.2% to $64.2 million from $68.5 million in the second quarter of 2011. This decrease resulted primarily from lower customer demand in most of the Company’s geographies and end markets due to overall weakness in the global economy. The third quarter 2011 book-to-bill ratio was below one. Third quarter 2011 gross margin decreased to 55.5% as compared to 58.3 % in the second quarter of 2011 primarily due to a larger proportion of lower margin consumer products combined with lower factory capacity utilization. Net income for the third quarter of 2011 was $9.2 million, or $0.15 per basic and diluted share, as compared to net income of $10.7 million, or $0.17 per basic and diluted share, for the second quarter of 2011, and net income of $14.9 million, or $0.24 per basic and diluted share, for the third quarter of 2010. During the third quarter of 2011, cash flows from operations were $19.1 million. During the third quarter of 2011, cash and short-term investments increased by $10.7 million to $143.0 million. In addition to increasing its quarterly cash dividend to $0.04 per share, during the third quarter of 2011 the Company repurchased $5.3 million of its common stock.

During the fourth quarter of 2011, revenues decreased 8.5% to $58.8 million from $64.2 million in the third quarter of 2011. This sequential decrease resulted primarily from lower customer demand across the Company’s geographies and end markets due to overall weakness in the global economy. The fourth quarter 2011 book-to-bill ratio was below one. Fourth quarter 2011 gross margin decreased to 50.5% as compared to 55.5 % in the third quarter of 2011 primarily due to a larger proportion of lower margin consumer products combined with lower factory capacity utilization. Net income for the fourth quarter of 2011 was $5.0 million, or $0.08 per basic and diluted share, as compared to net income of $9.2 million, or $0.15 per basic and diluted share, for the third quarter of 2011, and net income of $13.7 million, or $0.22 per basic and diluted share, for the fourth quarter of 2010. During the fourth quarter of 2011, cash flows from operations were $3.4 million. During the fourth quarter of 2011, cash and short-term investments decreased by $5.1 million to $138.0 million primarily due to repurchases of common stock. In addition to maintaining its quarterly $0.04 per share cash dividend, during the fourth quarter of 2011 the Company repurchased $7.8 million of its common stock.

For the year ended December 31, 2011, revenues decreased 12.9% to $259.0 from $297.4 million for the year ended December 31, 2010. This decrease was due to lower customer demand across most of the Company’s geographies and end markets, which resulted from global macro-economic conditions. Gross margin for 2011 decreased to 55.3% from 56.8% for 2010. This decrease was primarily due to a shift in mix to lower margin consumer-oriented products and lower factory utilization. Operating margin for 2011 was 18.1% which decreased from the record level of 25.2% in 2010. Net income was $34.0 million, or $0.55 per diluted share, compared with $50.7 million, or $0.81 per diluted share, in 2010. At December 31, 2011, cash, cash equivalents and short term investments were $137.9 million, an increase of $28.6 million from $109.2 million in 2010. The Company generated $50.1 million in cash flows from operations in 2011. In addition, in 2011 the Company repurchased $20.3 million of its common stock, and paid $9.4 million in dividends to shareholders.

During the first quarter of 2012, revenues increased 4.0% to $61.2 million from $58.8 million in the fourth quarter of 2011. This increase in revenue from the fourth quarter of 2011 was principally driven by overall demand from customers in most geographies and end markets. As compared to the same period last year, first quarter 2012 revenues decreased by $6.3 million. First quarter 2012 book-to-bill ratio was one, and showed improvement compared to the fourth quarter of 2011. First quarter 2012 gross margin was 54.3%, as compared to 50.5% in the fourth quarter of 2011. With the higher revenues compared to the fourth quarter of 2011, first quarter 2012 gross margin increased from the previous quarter primarily due to a higher percentage of distribution sales which carry higher margins, an increase in

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

factory utilization, and lower inventory reserve charges. Net income for the first quarter of 2012 was $5.4 million, or $0.09 per basic and diluted share, as compared to net income of $5.0 million, or $0.08 per basic and diluted share, for the fourth quarter of 2011, and net income of $9.1 million, or $0.15 per basic share and $0.14 per diluted share, for the first quarter of 2011. During the first quarter of 2012, cash flows from operations were $8.7 million. During the first quarter of 2012, cash and short-term investments decreased by $0.6 million to $137.3 million. In addition to maintaining its quarterly $0.04 per share cash dividend, during the first quarter of 2012 the Company repurchased $6.0 million of its common stock.

Revenues of $63.7 million in the second quarter of 2012 increased 4.2% from $61.2 million in the first quarter of 2012. The increase primarily resulted from stronger sales of the Company’s timing and communications products, including contributions from the acquisition of PhaseLink. This growth was in part offset by weaker than expected demand from the Company’s sell-through distributors primarily in Europe. The book-to-bill ratio in the second quarter of 2012 was above one. Second quarter 2012 gross margin increased to 55.2% as compared to 54.3% in the first quarter of 2012. The increase was principally due to a richer mix of higher-margin products and improved factory utilization. Net income attributable to Micrel, Incorporated shareholders for the second quarter of 2012 was $6.0 million, or $0.10 per basic and diluted share, as compared to net income of $5.4 million, or $0.09 per basic and diluted share, for the first quarter of 2012, and net income of $10.7 million, or $0.17 per basic and diluted share, for the second quarter of 2011. During the second quarter of 2012, cash flows from operations were $11.5 million. Cash and short term investments were $119.4 million at June 30, 2012 as compared to $137.3 million at March 31, 2012 which reflects a cash payment of $16.4 million (net of acquired cash) made on April 2, 2012 related to the PhaseLink acquisition. During the second quarter of 2012, the Company repurchased $8.7 million of its common stock. In addition, the Company maintained and paid its quarterly $0.04 per share cash dividend totaling approximately $2.5 million in the second quarter of 2012.

The Company derives a substantial portion of its net revenues from standard products. For both the three and six months ended June 30, 2012, the Company’s standard products sales accounted for 96% of the Company’s net revenues. The Company believes that a substantial portion of its net revenues in the future will depend upon standard products sales, although such sales as a proportion of net revenues may vary as the Company adjusts product output levels to correspond with varying economic conditions and demand levels in the markets which it serves. The standard products business is characterized by short-term orders and shipment schedules, and customer orders typically can be canceled or rescheduled without significant penalty to the customer. Since most standard products backlog is cancelable without significant penalty, the Company typically plans its production and inventory levels based on forecasts of customer demand, which are highly unpredictable and can fluctuate substantially. In addition, the Company is limited in its ability to reduce costs quickly in response to any revenue shortfalls.

The Company may experience significant fluctuations in its results of operations. Factors that affect the Company’s results of operations include the volume and timing of orders received, changes in the mix of products sold, the utilization level of manufacturing capacity, competitive pricing pressures and the successful development and customer acceptance of new products. These and other factors are described in further detail later in this discussion and in Part II Item 1A of this Quarterly Report on Form 10-Q titled “Risk Factors”. As a result of the foregoing or other factors, there can be no assurance that the Company will not experience material fluctuations in future operating results on a quarterly or annual basis, which could materially and adversely affect the Company’s business, financial condition, results of operations and cash flows.

Critical Accounting Policies and Estimates

The financial statements included in this Quarterly Report on Form 10-Q and discussed within this Management’s Discussion and Analysis of Financial Condition and Results of Operations have been prepared in accordance with accounting principles generally accepted in the United States of America. Preparation of these financial statements

24

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. On an on-going basis, management evaluates its estimates and judgments. Management bases its estimates and judgments on historical experience and on various other assumptions that are 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 that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. The Company considers certain accounting policies related to revenue recognition and receivables, inventory valuation, share-based compensation, income taxes, and litigation to be critical to the fair presentation of its financial statements. For a detailed discussion of the Company’s significant accounting policies, see Note 1 to Condensed Consolidated Financial Statements in this document and Note 1 of Notes to Consolidated Financial Statements in Item 8 of the Company’s Annual Report on Form 10-K for the year ended December 31, 2011.

Revenue Recognition and Receivables. Micrel generates revenue by selling products to OEMs, distributors and stocking representatives. Stocking representative firms may buy and stock the Company’s products for resale or may act as the Company’s sales representative in arranging for direct sales from the Company to an OEM customer. The Company’s policy is to recognize revenue from sales to customers when the rights and risks of ownership have passed to the customer, when persuasive evidence of an arrangement exists, the product has been delivered, the price is fixed or determinable and collection of the resulting receivable is reasonably assured.

The Company allows certain distributors located in North America and Europe, and in certain countries in Asia, significant return rights, price protection and pricing adjustments subsequent to the initial product shipment. As these returns and price concessions have historically been significant, and future returns and price concessions are difficult to reliably estimate, the Company defers recognition of revenue and related cost of sales (in the balance sheet line item “deferred income on shipments to distributors”) derived from sales to these distributors until they have resold the Company’s products to their customers. Although revenue and related cost of sales are not recognized, the Company records an accounts receivable and relieves inventory at the time of initial product shipment. As standard terms are FOB shipping point, payment terms are enforced from shipment date and legal title and risk of inventory loss passes to the distributor upon shipment.

In addition, where revenue is deferred upon shipment and recognized on a sell-through basis, the Company may offer price adjustments to its distributors to allow the distributor to price the Company’s products competitively for specific resale opportunities. The Company estimates and records an allowance for distributor price adjustments for which the specific resale transaction has been completed, but the price adjustment claim has not yet been received and recorded by the Company.

Sales to OEM customers and stocking representatives are recognized based upon the shipment terms of the sale transaction when all other revenue recognition criteria have been met. The Company does not grant return rights, price protection or pricing adjustments to OEM customers. The Company offers limited contractual stock rotation rights to stocking representatives. In addition, the Company is not contractually obligated to offer, but may infrequently grant, price adjustments or price protection to certain stocking representatives on an exception basis. At the time of shipment to OEMs and stocking representatives, an allowance for returns is established based upon historical return rates, and an allowance for price adjustments is established based on an estimate of price adjustments to be granted. Actual future returns and price adjustments could be different than the allowance established.

The Company also maintains an allowance for doubtful accounts for estimated uncollectible accounts receivable. This estimate is based on an analysis of specific customer creditworthiness and historical bad debts experience. Actual future uncollectible amounts could exceed the doubtful accounts allowance established.

25

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Inventory Valuation. Inventories are stated at the lower of cost (first-in, first-out method) or market. The Company records adjustments to write down the cost of obsolete and excess inventory to the estimated market value based on historical and forecasted demand for its products. If actual future demand for the Company’s products is less than currently forecasted, additional inventory adjustments may be required. Once an inventory write-down provision is established, it is maintained until the product to which it relates is sold or otherwise disposed of.

Share-Based Compensation. Share-based compensation is measured at the grant date based on the fair value of the award and is recognized as expense in the statement of operations. To determine fair value, the Company uses the Black-Scholes valuation model which requires input factors such as expected term, stock price volatility, dividend yield and risk free interest rate. In addition, the Company estimates expected forfeiture rates of stock grants and share-based compensation expense is only recognized for those shares expected to vest. Determining the input factors, such as expected term, expected volatility and estimated forfeiture rates, requires significant judgment based on subjective future expectations.

Income Taxes. Deferred tax assets and liabilities result primarily from temporary timing differences between book and tax valuation of assets and liabilities, and state research and development credit carryforwards. The Company must regularly assess the likelihood that future taxable income levels will be sufficient to ultimately realize the tax benefits of these deferred tax assets. As of June 30, 2012, the Company believes that future taxable income levels will be sufficient to realize the tax benefits of these deferred tax assets and has not established a valuation allowance except for net operating losses generated in China. Should the Company determine that future realization of these tax benefits is not more likely than not, a valuation allowance would be established, which would increase the Company’s tax provision in the period of such determination.

The Company uses a two-step approach to recognize and measure uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount which is more than 50% likely of being realized upon ultimate settlement. The Company considers many factors when evaluating and estimating its tax positions and tax benefits, which may require periodic adjustments and which may not accurately anticipate actual outcomes.

Litigation. The semiconductor industry is characterized by frequent litigation regarding patent and other intellectual property rights. During recent years, the Company has resolved litigation involving intellectual property claims. An estimated liability is accrued when it is determined to be probable that a liability has been incurred and the amount of loss can be reasonably estimated. The liability accrual is charged to income in the period in which such determination is made. The Company regularly evaluates current information available to determine whether such accruals should be made.

26

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Results of Operations

The following table sets forth certain operating data as a percentage of total net revenues for the periods indicated:

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Net revenues		100.0	%		100.0	%		100.0	%		100.0	%
Cost of revenues		44.8			41.7			45.3			42.8
Gross profit		55.2			58.3			54.7			57.2
Operating expenses:
Research and development		21.9			17.9			21.8			18.2
Selling, general and administrative		19.1			17.0			18.7			17.5
Total operating expenses		41.0			34.9			40.5			35.7
Income from operations		14.2			23.4			14.2			21.5
Other income (expense):
Interest income		0.3			0.3			0.3			0.3
Interest expense		(0.1	)		—			—			—
Other income (expense), net		(0.2	)		—			(0.1	)		—
Total other income, net		—			0.3			0.2			0.3
Income before income taxes and noncontrolling interest		14.2			23.7			14.4			21.8
Provision for income taxes		4.7			8.1			5.2			7.3
Net income		9.5			15.6			9.2			14.5
Less: net income attributable to noncontrolling interest		—			—			—			—
Net income attributable to Micrel, Incorporated shareholders		9.5	%		15.6	%		9.2	%		14.5	%

Net Revenues. For the three months ended June 30, 2012, net revenues decreased 7% to $63.7 million from $68.5 million for the same period in the prior year. For the six months ended June 30, 2012, net revenues decreased 8% to $124.9 million from $136.0 million for the same period in the prior year. The decreases were principally due to decreased revenues from the Company’s standard products. For the three months ended June 30, 2012, standard products revenues decreased 7% to $61.2 million from $65.8 million for the same period in the prior year primarily as a result of lower demand in the Company’s products serving the computer and wireless handsets markets which was partially offset by added revenues from the recent acquisition of PhaseLink. For the six months ended June 30, 2012, standard products revenues decreased 9% to $120.0 million from $131.4 million for the same period in the prior year. The decrease was principally due to reduced product demand across the Company’s geographies and end markets resulting from continued overall weakness in the global economy, which was partially offset by increased shipment of products in wireless handsets market during the first quarter of 2012 and added revenues from the PhaseLink acquisition.

27

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

For the three months ended June 30, 2012, other products revenues, which consist primarily of custom and foundry products revenues, decreased slightly to $2.5 million from $2.7 million for the same period in the prior year. For the six months ended June 30, 2012, other products revenues increased slightly to $4.8 million from $4.6 million for the same period in the prior year.

Customer demand for semiconductors can change quickly and unexpectedly. Historically, the Company’s revenue levels have been highly dependent on the amount of new orders for products to be delivered to the customer within the same quarter. Within the semiconductor industry, orders that are booked and shipped within the same quarter are called “turns fill” orders. When the turns fill level exceeds approximately 35% of quarterly revenues, it can be very difficult to predict near term revenues and income. The resulting lack of visibility into demand also makes it difficult to match product build with future demand as the Company’s lead times to build its products may be substantially longer than order lead times.

As noted in Part II, Item 1A “Risk Factors” and above in the overview section of this “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” customers in the semiconductor supply chain have worked to minimize the amount of inventory of semiconductors they hold. As a consequence, customers are generally providing less order backlog to the Company and other semiconductor suppliers, and relying on short lead times to buffer their build schedules. Shorter lead times reduce visibility into end demand and increase the reliance on turns fill orders. The reluctance of customers to provide order backlog together with short lead times and the uncertain growth rate of the world economy, make it difficult to precisely predict future levels of sales and profitability.

International sales represented 71% and 72% of net revenues for the three and six months ended June 30, 2012, respectively, as compared to 74% and 73% of net revenues for the three and six months ended June 30, 2011, respectively. Sales to customers in Asia represented 59% of net revenues for both the three and six months ended June 30, 2012, as compared to 59% and 58% of net revenues for the three and six months ended June 30, 2011, respectively. The trend for the Company’s customers to move their electronics manufacturing to Asian countries has resulted in increased pricing pressure for the Company and other semiconductor manufacturers as Asian-based manufacturers are typically more concerned about cost and less concerned about the capability of the integrated circuits they purchase. This can make it more difficult for U.S.-based companies to differentiate themselves in any meaningful manner other than by lowering prices. The increased concentration of electronics procurement and manufacturing in the Asia Pacific region has led, and may continue to lead, to continued price pressure for the Company’s products in the future.

Gross Profit. Gross profit is affected by a variety of factors including the volume of product sales, product mix, manufacturing capacity utilization, product yields and average selling prices. The Company’s gross margin decreased to 55.2% for the three months ended June 30, 2012 from 58.3% for the comparable period in 2011. For the six months ended June 30, 2012, the Company’s gross margin decreased to 54.7% from 57.2% for the comparable period in 2011. These decreases were primarily due to decreased average selling prices in general, lower factory capacity utilization and increased proportion of lower margin products shipped to the wireless handsets market as compared to the same period in 2011.

Research and Development Expenses. Research and development expenses as a percentage of net revenues represented 21.9% for the three months ended June 30, 2012 as compared to 17.9% for the three months ended June 30, 2011. On a dollar basis, research and development expenses increased $1.7 million, or 13.8%, to $13.9 million for the three months ended June 30, 2012 from $12.2 million for the comparable period in 2011. For the six months ended June 30, 2012 and 2011, research and development expenses as a percentage of net revenues represented 21.8% and 18.2%, respectively. On a dollar basis, research and development expenses increased $2.5 million, or 10%, to $27.2 million for the six months ended June 30, 2012 from $24.8 million for the comparable period in 2011.

28

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

These increases were primarily due to increased consulting services and mask expenses for research and development activities as well as added headcount from the acquisition of PhaseLink. The Company believes that the development and introduction of new products is critical to its future success and expects to continue its investment in research and development activities in the future.

Selling, General and Administrative Expenses. As a percentage of net revenues, selling, general and administrative expenses represented 19.1% for the three months ended June 30, 2012 and 17.0% for the three months ended June 30, 2011. On a dollar basis, selling, general and administrative expenses increased $507,000, or 4%, to $12.2 million for the three months ended June 30, 2012 from $11.7 million for the comparable period in 2011. This increase was primarily due to added headcount expenses from the acquisition of PhaseLink and related amortization expenses of acquired intangible assets, increased spending on product and corporate marketing activities, and a legal settlement accrual, which were partially offset by decreased profit sharing accruals and selling expenses.

For the six months ended June 30, 2012 and 2011, selling, general and administrative expenses as a percentage of net revenues represented 18.7% and 17.5%, respectively. On a dollar basis, selling, general and administrative expenses decreased $424,000, or 2%, to $23.3 million for the six months ended June 30, 2012 from $23.8 million for the comparable period in 2011. The slight reduction was primarily due to decreased profit sharing accruals and a reduction of selling expenses, which were offset in part by increased expenses for product and marketing activities, a legal settlement accrual, and added expenses from the PhaseLink acquisition, including the headcount expenses, related acquisition costs and amortization expenses of acquired intangible assets.

Share-Based Compensation. The Company’s results of operations for the three month periods ended June 30, 2012 and 2011 included $1.9 million and $1.3 million, respectively, of non-cash expense related to the fair value of share-based compensation awards. For the six month periods ended June 30, 2012 and 2011, the Company’s results of operations included $3.7 million and $2.7 million, respectively, of share-based compensation awards. Share-based compensation expense is included in the statement of operations in cost of revenues, research and development expenses and selling, general and administrative expenses (see Note 4 of Notes to Condensed Consolidated Financial Statements).

Other Income (Expense). Other income, net reflects interest income from investments in short-term and long-term investment securities and money market funds and other non-operating income or expense related primarily to foreign currency translation gain or loss, offset by interest expense incurred.

Provision for Income Taxes. The income tax provision for the three and six months ended June 30, 2012, as a percentage of income before taxes, was 33.4% and 36.2%, respectively. The income tax provision for the three and six months ended June 30, 2011, as a percentage of income before taxes, was 34.0% and 33.3%, respectively. The tax provision for the six months ended June 30, 2012 included an out-of-period charge of $491,000 related to the write-offs of deferred tax assets associated with the net operating losses of two previously acquired companies. This charge is immaterial for the three and six months ended June 30, 2012 and immaterial to any applicable prior periods that could have been affected. For the three months ended June 30, 2012, the Company recognized $176,000 of previously unrecognized tax benefits due to settlements with the tax authorities. In addition, the tax provision for this period excluded the benefits from the federal research and development credit which expired on December 31, 2011. The income tax provision for these interim periods differs from taxes computed at the federal statutory rate primarily due to the tax effects of share-based compensation, state income taxes, federal and state research and development credits and federal qualified production activity deductions.

29

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Liquidity and Capital Resources

Since inception, the Company’s principal sources of funding have been its cash from operations, bank borrowings and sales of common stock. Principal sources of liquidity at June 30, 2012 consisted of cash, cash equivalents and short-term investments of $119.4 million and a $5.0 million revolving line of credit from a commercial bank.

The Company generated $20.2 million in cash from operating activities during the six months ended June 30, 2012. Significant cash flows included cash provided by net income of $11.4 million plus additions for non-cash activities of $8.0 million (consisting primarily of $6.1 million in depreciation and amortization and $3.7 million in share-based compensation expense and related tax effects, partially offset by a $1.7 million increase in deferred income taxes) combined with a $6.9 million decrease in income taxes receivable which was offset in part by a $4.6 million increase in accounts receivable, a $1.1 million decrease in accounts payable and a $0.9 million decrease in other current liabilities.

During the six months ended June 30, 2011, the Company generated $27.5 million in cash from operating activities. Significant cash flows included cash provided by net income of $19.8 million plus additions for non-cash activities of $10.6 million (consisting primarily of $6.3 million in depreciation and amortization, $2.2 million in share-based compensation expense and related tax effects and $2.1 million increase in deferred tax assets) combined with a $5.1 million decrease in income taxes receivable, which were offset in part by a $4.5 million decrease in accounts payable combined with a $2.9 million increase in accounts receivable and a $1.5 million increase in inventory.

The Company used $26.3 million of cash in investing activities during the six months ended June 30, 2012, comprised of $30.6 million in purchases of investments, $16.4 million in the acquisition of PhaseLink and $4.1 million in purchases of property, plant and equipment, which were offset by $24.8 million in proceeds from the sales and maturities of investments.

During the six months ended June 30, 2011, the Company used $1.7 million of cash in investing activities that comprised primarily of $23.9 million in purchases of investments and $4.8 million of purchases of property, plant and equipment, which was partially offset by $27.0 million in proceeds from the sales of investments.

30

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The Company used $18.5 million of cash in financing activities during the six months ended June 30, 2012 primarily for the repurchases of $14.7 million of its common stock and $4.9 million for the payment of cash dividends, which were partially offset by $1.5 million in proceeds from employee stock transactions.

During the six months ended June 30, 2011, the Company used $3.1 million of cash in financing activities primarily for the repurchase of $7.2 million of its common stock, $4.4 million for the payment of cash dividends and $2.9 million in repayments of long-term debt, which were partially offset by $10.9 million in proceeds from employee stock transactions.

The Company currently intends to spend approximately $4 million to $8 million to purchase capital equipment and make facility improvements during the next twelve months primarily for manufacturing equipment and additional research and development related software and equipment.

On July 26, 2012, the Company’s Board of Directors declared a cash dividend of $0.04 per outstanding share of common stock payable on August 24, 2012 to shareholders of record at the close of business on August 10, 2012. This dividend will be recorded in the third quarter of 2012 and is expected to be approximately $2.4 million.

Under the Company’s stock repurchase program, as of June 30, 2012, the Company was authorized to repurchase an additional $9.0 million of its common stock. On July 26, 2012, the Company announced that its Board of Directors has authorized the repurchase of an additional $30.0 million of the Company’s common stock. This new authorization brings the total available for repurchase to $39.0 million.

The Company believes that its cash from operations, existing cash balances, short-term investments and its credit facility will be sufficient to meet its cash requirements for at least the next twelve months. In the longer term, the Company believes future cash requirements will continue to be met by its cash from operations, credit arrangements and future debt or equity financings as required.

Recently Issued Accounting Standards

Please refer to Note 2 of Notes to Condensed Consolidated Financial Statements for a discussion of the expected impact of recently issued accounting standards.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Contractual Obligations and Commitments

As of June 30, 2012, the Company had the following contractual obligations and commitments (in thousands):

	Payments Due By Period
	Total		Less than 1 Year		1-3 Years		4-5 Years		After 5 Years
Operating leases	$	1,572	$	830	$	676	$	66	$	—
Open purchase orders		17,472		17,472		—		—		—
Total	$	19,044	$	18,302	$	676	$	66	$	—

Open purchase orders are defined as agreements to purchase goods or services that are enforceable and legally binding and that specify all significant terms, including: fixed or minimum quantities to be purchased; fixed, minimum or variable pricing provisions; and the approximate timing of the transactions.

Borrowing agreements consisted of an unsecured credit facility with Bank of the West. The credit facility includes a $5.0 million line of credit available for general working capital needs, a $5.0 million letter of credit sub-facility and a $2.0 million foreign exchange sub-facility. As of June 30, 2012, the Company had no borrowings under the line of credit.

As of June 30, 2012, the Company had $8.6 million of unrecognized tax benefits. Included in the $8.6 million is $2.1 million which has not yet reduced income tax payments, and therefore, has been netted against non-current deferred tax assets. The remaining $6.5 million liability was included in long-term income taxes payable. The Company does not anticipate a significant change to the $6.5 million long-term uncertain income tax positions within the next 12 months.

Off-Balance Sheet Arrangements

As of June 30, 2012, the Company had no off-balance sheet arrangements and has not entered into any transactions involving unconsolidated, limited purpose entities or commodity contracts.

32

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

At June 30, 2012, the Company held $7.7 million in principal of senior auction rate notes secured by student loans. Auctions for these auction rate notes have failed as of June 30, 2012. The funds associated with failed auctions will not be accessible until a successful auction occurs, a buyer is found outside of the auction process, the issuers redeem the securities or the underlying securities have matured. As a result, the Company may have limited or no ability to liquidate its investment and fully recover the carrying value of its investment in the near term. As of June 30, 2012, the Company has recorded a $0.6 million net of tax ($0.9 million pre-tax) temporary impairment of these securities to other comprehensive income, a component of shareholders’ equity. If it is determined that the fair value of these securities is other than temporarily impaired, the Company would record a loss, which could be material, in its statement of operations in the period such other than temporary decline in fair value is determined. The Company currently has the ability and intent to hold these investments until a recovery of the auction process occurs or the issuers redeem the securities, or until maturity if neither of those occurs.

At June 30, 2012, the Company had no fixed-rate long-term debt subject to interest rate risk. There was no interest rate swap contract outstanding at June 30, 2012.

ITEM 4. CONTROLS AND PROCEDURES

The Company maintains disclosure controls and procedures, as such term is defined under Rule 13a-15(e) promulgated under the Exchange Act. In designing and evaluating the disclosure controls and procedures, management recognizes that any disclosure controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management necessarily is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

Under the supervision and with the participation of the Company’s management, including its principal executive officer and principal financial officer, the Company conducted an evaluation of the effectiveness of its disclosure controls and procedures as of the end of the period covered by this report. Based on this evaluation, the Company’s principal executive officer and principal financial officer have concluded that the Company’s disclosure controls and procedures were effective at the reasonable assurance level as of June 30, 2012.

There has been no change in the Company’s internal control over financial reporting during the Company’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

Our management, including our principal executive officer and principal financial officer, believes that our disclosure controls and procedures and internal control over financial reporting are designed to provide reasonable assurance of achieving their objectives and are effective at the reasonable assurance level. However, our management does not expect that our disclosure controls and procedures or our internal control over financial reporting will prevent all errors and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, 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. 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. These inherent limitations include the realities that judgments in decision making can be faulty, and that breakdowns can occur because of a simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people or by management override of the controls. The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions; over time, controls may become inadequate because of changes in conditions, or the degree of compliance with policies or procedures may deteriorate. Because of the inherent limitations in a cost effective control system, misstatements due to error or fraud may occur and not be detected.

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PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

The information included in Note 14 of Notes to Condensed Consolidated Financial Statements under the caption “Litigation and Commitments and Contingencies” in Item 1 of Part I is incorporated herein by reference.

ITEM 1A. RISK FACTORS

Factors That May Affect Operating Results

If the Company’s operating results are below the expectations of public market analysts or investors, then the market price of its common stock could decline. Many factors that can affect the Company’s quarterly and annual results are difficult to control or predict. Some of the factors which can affect a multinational semiconductor business such as the Company are described below.

Geopolitical and Macroeconomic Risks That May Affect Multinational Enterprises

Weak global economic conditions could have a material adverse effect on the Company’s business, results of operations, and financial condition. While the global economy has partially recovered from the economic downturn that began in 2007, continued weakness in the macroeconomic climate has constrained demand for the Company’s semiconductors and there is no guarantee that these conditions will improve in a timely manner or at all or that these conditions will not further decline again in the future. The semiconductor industry has traditionally been highly cyclical and has often experienced significant downturns in connection with, or in anticipation of, declines in general economic conditions. The Company cannot accurately predict the timing, severity or duration of such downturns. A global recession may result in a decrease in orders for the Company’s products, which may materially adversely affect the Company’s revenues, results of operations and financial condition. In addition to reduction in sales, the Company’s profitability may decrease during economic downturns because the Company may not be able to reduce costs at the same rate as its sales decline.

Demand for semiconductor components is increasingly dependent upon the rate of growth of the global economy. Many factors could adversely affect regional or global economic growth. Some of the factors that could slow global economic growth include: volatility in global credit markets, price inflation or deflation for goods, services or materials, a slowdown in the rate of growth of regional economies such as Europe, China or the United States, a significant act of terrorism that disrupts global trade or consumer confidence, and geopolitical tensions including war and civil unrest. Reduced levels of economic activity, or disruptions of international transportation, could adversely affect sales on either a global basis or in specific geographic regions.

Market conditions may lead the Company to initiate cost reduction plans, which may negatively affect near term operating results. Weaker customer demand, competitive pricing pressures, excess capacity, weak economic conditions or other factors, may cause the Company to initiate actions to reduce the Company’s cost structure to improve the Company’s future operating results. The cost reduction actions may require incremental costs to implement, which could negatively affect the Company’s operating results in periods when the incremental costs or liabilities are incurred.

Disruption in financial markets may adversely affect the Company’s business in a number of ways. The unprecedented contraction and extreme disruption of the credit and financial markets in the United States, Europe, and Asia that began in 2007 led to, among other things, extreme volatility in security prices, severely diminished liquidity and credit availability, rating downgrades of certain investments and declining valuation of others. A similar tightening of credit in financial markets in the future may limit the ability of the Company’s customers and suppliers to obtain financing for capital purchases and operations. This could result in a decrease in or cancellation of orders for the Company’s products or reduced ability to finance operations to supply products to the Company.

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The Company cannot predict the likely duration and severity of disruptions in financial markets and adverse economic conditions in the U.S. and other countries. Further, fluctuations in worldwide economic conditions make it extremely difficult for the Company to forecast future sales levels based on historical information and trends. Visibility into customer demand is limited due to short order lead times. Portions of the Company’s expenses are fixed and other expenses are tied to expected levels of sales activities. To the extent the Company does not achieve its anticipated levels of sales, its gross profit and net income could be adversely affected.

The Company has generated a substantial portion of its net revenues from export sales. The Company believes that a substantial portion of its future net revenues will depend on export sales to customers in international markets, including Asia. International markets are subject to a variety of risks, including changes in policy by the U.S. or foreign governments, acts of terrorism, natural disasters, foreign government instability, social conditions such as civil unrest, economic conditions including high levels of inflation or deflation, fluctuation in the value of foreign currencies and currency exchange rates and trade restrictions or prohibitions. Changes in exchange rates that strengthen the U.S. dollar could increase the price of the Company’s products in the local currencies of the foreign markets it serves. This would result in making the Company’s products relatively more expensive than its competitors’ products that are denominated in local currencies, leading to a reduction in sales or profitability in those foreign markets. The Company has not taken any protective measures against exchange rate fluctuations, such as purchasing hedging instruments. In addition, the Company sells to domestic customers that do business worldwide and cannot predict how the businesses of these customers may be affected by economic or political conditions elsewhere in the world. Such factors could adversely affect the Company’s future revenues, financial condition, results of operations or cash flows.

Semiconductor Industry Specific Risks

The volatility of customer demand in the semiconductor industry limits a company’s ability to predict future levels of sales and profitability. Semiconductor suppliers can rapidly increase production output in response to slight increases in demand, leading to a sudden oversupply situation and a subsequent reduction in order rates and revenues as customers adjust their inventories to account for shorter lead times. A rapid and sudden decline in customer demand for products can result in excess quantities of certain products relative to demand. Should this occur, the Company’s operating results may be adversely affected as a result of charges to reduce the carrying value of the Company’s inventory to the estimated demand level or market price. The Company’s quarterly revenues are highly dependent upon turns fill orders (orders booked and shipped in the same quarter). The short-term and volatile nature of customer demand makes it extremely difficult to accurately predict near term revenues and profits.

The semiconductor industry is highly competitive and subject to rapid technological change, price-erosion and increased international competition. Significant competitive factors include product features; performance and price; timing of product introductions; emergence of new computer and communications standards; and quality and customer support. If the Company is unable to compete favorably in these areas, revenues and profits could be negatively affected.

The short lead-time environment in the semiconductor industry has allowed many end consumers to rely on semiconductor suppliers, stocking representatives and distributors to carry inventory to meet short-term requirements and minimize their investment in on-hand inventory. Customers have worked to minimize the amount of inventory of semiconductors they hold. As a consequence, customers are generally providing less order backlog to the Company and other semiconductor suppliers, resulting in short order lead times and reduced visibility into customer demand. As a consequence of the short lead-time environment and corresponding unpredictability of customer demand, the Company has increased its inventories over the past several years to maintain reliable service levels. If actual customer demand for the Company’s products is different from the Company’s estimated demand, delivery schedules may be impacted, product inventory may have to be scrapped, or the carrying value reduced, which could adversely affect the Company’s business, financial condition, results of operations, or cash flows.

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In addition, the Company maintains a network of stocking representatives and distributors that carry inventory to service the volatile short-term demands of end customers. However, like many of its competitors, the Company recognizes revenue on sales of product to stocking representatives on a sell-in basis, rather than a sell-through basis, so fluctuations in inventory accumulation by stocking representatives can exacerbate fluctuations in revenue from sales to such stocking representatives. Also, should the relationship with a distributor or stocking representative be terminated, the level of product returns could be higher than the returns allowance established, which could negatively affect the Company’s revenues and results of operations.

Uncertain economic growth and customer demand in the semiconductor industry and increased concentration of electronics procurement and manufacturing may lead to further price erosion and increased advertising costs. If price erosion continues to occur, it will have the effect of reducing revenue levels and gross margins in future periods. Furthermore, the trend for the Company’s customers to move their electronics manufacturing to Asian countries has brought increased pricing pressure for Micrel and the semiconductor industry as a whole. Asian based manufacturers are typically more concerned about cost and less concerned about the capability of the integrated circuits they purchase. The increased concentration of electronics procurement and manufacturing in the Asia Pacific region may lead to continued price pressure and additional product advertising costs for the Company’s products in the future.

Many semiconductor companies, including the Company, face risks associated with a dependence upon third parties that manufacture, assemble, package or supply raw materials for certain of its products. These risks include reduced control over delivery schedules and quality; inadequate manufacturing yields and excessive costs; the potential lack of adequate capacity during periods of excess demand; difficulties selecting and integrating new subcontractors; potential increases in prices; disruption in supply due to civil unrest, terrorism, natural disasters or other events which may occur in the countries in which the subcontractors or suppliers operate; and potential misappropriation of the Company’s intellectual property. The occurrence of any of these events may lead to increased costs or delay delivery of the Company’s products, which would harm its profitability and customer relationships. Furthermore, a major disruption to any part of the Company’s customers’ supply chains could decrease their output and subsequently result in lower demand for the Company’s products.

The Company generally does not have long-term supply contracts with its third-party vendors. Therefore, most of its vendors are not obligated to perform services or supply products to the Company for any specific period, in any specific quantities, or at any specific price, except as may be provided in a particular accepted purchase order or guarantee. Additionally, the Company’s wafer and product requirements typically represent a relatively small portion of the total production of the suppliers, third-party foundries and outside assembly, testing and packaging contractors. As a result, the Company is subject to the risk that a third-party supplier will provide delivery or capacity priority to other larger customers to the Company’s detriment, resulting in an inadequate supply to meet customer demand or higher costs to obtain the necessary product supply.

The Company outsources some of its wafer fabrication, most of its test and all of its assembly requirements to third-party vendors. When demand for semiconductors improves, availability of these outsourced services typically becomes tight, resulting in longer than normal lead times and delinquent shipments to customers. The degree to which Micrel may have difficulty obtaining these services could have a negative impact on the Company’s revenues, bookings and backlog. If these lead times are extended, the resulting loss of near-term visibility for our customers could result in their placing higher order levels than their actual requirements which may result in higher levels of order cancellations in the future. There can be no assurance that the Company will be able to accurately forecast demand and moderate its build schedules to accommodate the possibility of an increase in order cancellations.

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The markets that the Company serves frequently undergo transitions in which products rapidly incorporate new features and performance standards on an industry-wide basis. If the Company’s products are unable to support the new features or performance levels required by OEMs in these markets, the Company would likely lose business from existing or potential customers and would not have the opportunity to compete for new design wins until the next product transition. If the Company fails to develop products with required features or performance standards or experiences even a short delay in bringing a new product to market, or if its customers fail to achieve market acceptance of their products, its revenues could be significantly reduced for a substantial period of time.

Because the standard products market for ICs is diverse and highly fragmented, the Company encounters different competitors in various market areas. Many of these competitors have substantially greater technical, financial and marketing resources and greater name recognition than the Company. The Company may not be able to compete successfully in either the standard products or custom and foundry products businesses in the future and competitive pressures may adversely affect the Company’s financial condition, results of operations or cash flows.

The success of companies in the semiconductor industry depends in part upon intellectual property, including patents, trade secrets, know-how and continuing technology innovation. The success of companies like Micrel may depend on their ability to obtain necessary intellectual property rights and protect such rights. There can be no assurance that the steps taken by the Company to protect its intellectual property will be adequate to prevent misappropriation or that others will not develop competitive technologies or products. There can be no assurance that any patent owned by the Company will not be invalidated, circumvented or challenged, that the rights granted thereunder will provide competitive advantages or that any of its pending or future patent applications will be issued with the scope of the claims sought, if at all. Furthermore, others may develop technologies that are similar or superior to the Company’s technology, duplicate technology or design around the patents owned by the Company.

Additionally, the semiconductor industry is characterized by frequent litigation regarding patent and other intellectual property rights. Claims alleging infringement of intellectual property rights have been asserted against the Company in the past and could be asserted against the Company in the future. These claims could result in the Company having to discontinue the use of certain processes or designs; cease the manufacturing, use and sale of infringing products; incur significant litigation costs and damages; attempt to obtain a license to the relevant intellectual property and develop non-infringing technology. The Company may not be able to obtain or renew such licenses on acceptable terms or to develop non-infringing technology. Existing claims or other assertions or claims for indemnity resulting from infringement claims could adversely affect the Company’s business, financial condition, results of operations or cash flows. In addition, the Company relies on third parties for certain technology that is integrated into some of its products. If the Company is unable to continue to use or license third-party technologies in its products on acceptable terms, or the technology fails to operate, the Company may not be able to secure alternative technologies in a timely manner and its business would be harmed.

The significant investment in semiconductor manufacturing capacity and the rapid growth of circuit design centers in China may present a competitive threat to established semiconductor companies due to the current low cost of labor and capital in China. The emergence of low cost competitors in China could reduce the revenues and profitability of established semiconductor manufacturers.

There is intense competition for qualified personnel in the semiconductor industry. The loss of any key employees or the inability to attract or retain qualified personnel, including management, engineers and sales and marketing personnel, could delay the development and introduction of the Company’s products and harm its ability to sell its products. The Company believes that its future success is dependent on the contributions of its senior management, including its President and Chief Executive Officer, certain other executive officers and senior engineering personnel. The Company does not have long-term employment contracts with these or any other key personnel, and their knowledge of the Company’s business and industry would be difficult to replace.

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Companies in the semiconductor industry are subject to a variety of federal, state and local governmental regulations related to the use, storage, discharge and disposal of toxic, volatile or otherwise hazardous chemicals used in its manufacturing process. Any failure to comply with present or future regulations could result in the imposition of fines, the suspension of production, alteration of manufacturing processes or a cessation of operations. In addition, these regulations could restrict the Company’s ability to expand its facilities at their present locations or construct or operate a new wafer fabrication facility or could require the Company to acquire costly equipment or incur other significant expenses to comply with environmental regulations or clean up prior discharges. The Company’s failure to appropriately control the use of, disposal or storage of, or adequately restrict the discharge of, hazardous substances could subject it to future liabilities and could have a material adverse effect on its business.

Company-Specific Risks

In addition to the risks that affect multinational semiconductor companies listed above, there are additional risks which are more specific to the Company such as:

An important part of the Company’s strategy is to continue to focus on the market for high-speed communications ICs. Should demand from the Company’s customers in this end market decrease, or if lower customer demand for the Company’s high bandwidth products materializes, the Company’s future revenue growth and profitability could be adversely affected.

The wireless handset (cellular telephone) market comprises a significant portion of the Company’s standard product revenues. The Company derives a significant portion of its net revenues from customers serving the wireless handset market. Due to the highly competitive and fast changing environment in which the Company’s wireless handset customers operate, demand for the product the Company sells into this end market can change rapidly and unexpectedly. If the Company’s wireless handset customers’ acceptance of Micrel’s products decreases, or if these customers lose market share or accumulate too much inventory of completed handsets, the demand for the Company’s products could decline sharply, which could adversely affect the Company’s revenues and results of operations.

The Company’s gross margin, operating margin and net income are highly dependent on the level of revenue, average selling prices and capacity utilization that the Company experiences. A decline in average selling prices (“ASPs”) could adversely affect the Company’s revenues, gross margins and results of operations unless the Company is able to sell more units, reduce its costs, introduce new products with higher ASPs or some combination thereof.

Semiconductor manufacturing is a capital-intensive business resulting in high fixed costs. If the Company is unable to utilize its installed wafer fabrication or test capacity at a high level, the costs associated with these facilities and equipment would not be fully absorbed, resulting in higher average unit costs and lower profit margins.

The Company has invested in certain auction rate securities that may not be accessible for more than 12 months and these auction rate securities may experience an other than temporary decline in value, which would adversely affect the Company’s income. At June 30, 2012, the Company held $7.7 million in principal of auction rate notes secured by student loans. As of June 30, 2012, all of these auction rate securities have failed to auction successfully due to sell orders exceeding buy orders. The Company has recorded a $0.6 million net of tax ($0.9 million pre-tax) temporary impairment of these securities to other comprehensive income, a component of shareholders’ equity. If it is determined that the fair value of these securities is other than temporarily impaired, the Company would record a loss, which could be material, in its statement of operations in the period such other than temporary decline in fair value is determined. For additional information regarding the Company’s investments, see Note 5 of Notes to Condensed Consolidated Financial Statements.

The Company faces various risks associated with the trend toward increased shareholder activism. In 2008, the Company became engaged in a proxy contest with a large shareholder. This dispute led to a significant increase in operating expenses which appreciably reduced the Company’s operating profit and net income. Although this dispute was resolved, the Company could become engaged in another proxy contest in the future. Another proxy contest would require significant additional management time and increased operating expenses, which could adversely affect the Company’s profitability and cash flows.

The semiconductor industry is characterized by frequent litigation regarding patent and other intellectual property rights. To the extent that the Company becomes involved in such intellectual property litigation, it could result in substantial costs and diversion of resources to the Company and could have a material adverse effect on the Company’s financial condition, results of operation or cash flows.

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In the event of an adverse ruling in any intellectual property litigation that might arise in the future, the Company might be required to discontinue the use of certain processes or designs, cease the manufacture, use and sale of infringing products, expend significant resources to develop non-infringing technology or obtain licenses to the infringing technology. There can be no assurance, however, that under such circumstances, a license would be available under reasonable terms or at all. In the event of a successful claim against the Company and the Company’s failure to develop or license substitute technology on commercially reasonable terms, the Company’s financial condition, results of operations or cash flows could be adversely affected.

The complexity of the Company’s products may lead to errors or defects, which could subject the Company to significant costs or damages and adversely affect market acceptance of its products. Although the Company’s customers and suppliers rigorously test its products, these products may contain undetected errors, weaknesses or defects. If any of the Company’s products contain production defects, reliability, quality or compatibility problems that are significant, the Company’s reputation may be damaged and customers may be reluctant to continue to buy its products. This could adversely affect the Company’s ability to retain and attract new customers. In addition, these defects could interrupt or delay sales of affected products, which could adversely affect the Company’s results of operations.

If defects are discovered after commencement of commercial production, the Company may be required to incur significant costs to resolve the problems. This could result in significant additional development costs and the diversion of technical and other resources from other development efforts. The Company could also incur significant costs to repair or replace defective products or may agree to be liable for certain damages incurred. These costs or damages could have a material adverse effect on the Company’s financial condition and results of operations.

The Company will continue to expend substantial resources developing new products, applications or markets and may never achieve the sales volume that it anticipates for these products, which may limit the Company’s future growth and harm its results of operations. The Company’s future success will depend in part upon the success of new products. The Company has in the past, and will likely in the future, expend substantial resources in developing new and additional products for new applications and markets. The Company may experience unforeseen difficulties and delays in developing these products and experience defects upon volume production and broad deployment. The markets the Company enters will likely be highly competitive and competitors may have substantially more experience in these markets. The Company’s success will depend on the growth of the markets it enters, the competitiveness of its products and its ability to increase market share in these markets. If the Company enters markets that do not achieve or sustain the growth it anticipates, or if the Company’s products are not competitive, it may not achieve volume sales, which may limit the Company’s future growth and would harm its results of operations.

If the Company is unable to convert a significant portion of its design wins into revenue, the Company’s business, financial condition and results of operations could be materially and adversely impacted. The Company has secured a number of design wins for new and existing products. Such design wins are necessary for revenue growth. However, many of the Company’s design wins may never generate revenues if end-customer projects are unsuccessful in the marketplace or the end-customer terminates the project, which may occur for a variety of reasons. Mergers and consolidations among customers may lead to termination of certain projects before the associated design win generates revenue. If design wins do generate revenue, the time lag between the design win and meaningful revenue is typically from six months to greater than eighteen months. If the Company fails to convert a significant portion of its design wins into substantial revenue, the Company’s business, financial condition and results of operations could be materially and adversely impacted.

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If the Company’s distributors or sales representatives stop selling or fail to successfully promote its products, the Company’s business, financial condition and results of operations could be adversely impacted. Micrel sells many of its products through sales representatives and distributors. The Company’s non-exclusive distributors and sales representatives may carry its competitors’ products, which could adversely impact or limit sales of the Company’s products. Additionally, they could reduce or discontinue sales of the Company’s products or may not devote the resources necessary to adequately sell the Company’s products. The Company’s agreements with distributors contain limited provisions for return of products, including stock rotations whereby distributors may return a percentage of their purchases based upon a percentage of their most recent three months of shipments. In addition, in certain circumstances upon termination of the distributor relationship, distributors may return some or all of their prior purchases. The loss of business from any of the Company’s significant distributors or the delay of significant orders from any of them could materially and adversely harm the Company’s business, financial conditions and results of operations.

In addition, the Company depends on the continued viability and financial resources of these distributors and sales representatives, some of which are small organizations with limited working capital. In turn, these distributors and sales representatives are subject to general economic and semiconductor industry conditions. If some or all of the Company’s distributors and sales representatives experience financial difficulties or otherwise become unable or unwilling to promote and sell the Company’s products or deliver the Company’s products in a timely manner, its business, financial condition and results of operations could be adversely impacted.

The Company manufactures most of its semiconductors at its San Jose, California fabrication facilities. The Company’s existing wafer fabrication facility, located in Northern California, may be subject to natural disasters such as earthquakes. A significant natural disaster, such as an earthquake or prolonged drought, could have a material adverse impact on the Company’s business, financial condition and operating results. Furthermore, manufacturing semiconductors requires manufacturing tools that are unique to each product being produced. If one of these unique manufacturing tools was damaged or destroyed, the Company’s ability to manufacture the related product would be impaired and its business would suffer until the tool was repaired or replaced. Additionally, the fabrication of ICs is a highly complex and precise process. Small impurities, contaminants in the manufacturing environment, difficulties in the fabrication process, defects in the masks used to print circuits on a wafer, manufacturing equipment failures and wafer breakage or other factors can cause a substantial percentage of wafers to be rejected or numerous die on each wafer to be nonfunctional. The Company maintains approximately two to three months of inventory that has completed the wafer fabrication manufacturing process. This inventory is generally located offshore at third party subcontractors but may not be sufficient to fully mitigate the adverse impact from a disruption to the Company’s San Jose wafer fabrication activity arising from a natural disaster such as an earthquake.

The Company may be subject to disruptions or failures in information technology systems and network infrastructures that could have a material adverse effect on its business and financial condition. The Company relies on the efficient and uninterrupted operation of complex information technology systems and network infrastructures to operate its business. A disruption, infiltration or failure of the Company’s information technology systems as a result of software or hardware malfunctions, system implementations or upgrades, computer viruses, third-party security breaches, employee error, theft or misuse, malfeasance, power disruptions, natural disasters or accidents could cause breaches of data security, loss of intellectual property and critical data and the release and misappropriation of sensitive competitive information and partner, customer and employee personal data. Any of these events could harm the Company’s competitive position, result in a loss of customer confidence, cause the Company to incur significant costs to remedy any damages and ultimately materially adversely affect its business and financial condition.

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While the Company has implemented a number of protective measures, including firewalls, antivirus, patches, data encryption, log monitors, routine back-ups with offsite retention of storage media, system audits, data partitioning, routine password modifications and disaster recovery procedures, such measures may not be adequate or implemented properly to prevent or fully address the adverse effect of such events. In addition, the Company’s third-party subcontractors, including its test and assembly houses and distributors, have access to certain portions of the Company’s and its customers’ and partners’ sensitive data. In the event that these subcontractors do not properly safeguard such data, security breaches and loss of data could result. Any such loss of data by its third-party subcontractors could have a material adverse effect on the Company’s business and financial condition.

The Company’s results of operations could vary as a result of the methods, estimations and judgments used in applying its accounting policies. The methods, estimates and judgments used by the Company in applying its accounting policies have a significant impact on its results of operations. Such methods, estimates and judgments are, by their nature, subject to substantial risks, uncertainties, assumptions and changes in rulemaking by the regulatory bodies, and factors may arise over time that lead the Company to change its methods, estimates, and judgments. Changes in those methods, estimates and judgments could significantly impact the Company’s results of operations.

Changes in tax laws could adversely affect the Company’s results of operations. The Company is subject to income taxes in the United States and in various foreign jurisdictions. Significant judgment is required in determining the Company’s worldwide tax liabilities. The Company believes that it complies with applicable tax law. However, if the governing tax authorities have a different interpretation of the applicable law or if there is a change in tax law, the Company’s financial condition and results of operations may be adversely affected.

The integration of PhaseLink into the Company’s business and potential future acquisitions that the Company may pursue involve a number of risks. If the Company is unable to address and resolve these risks successfully, such integrations or acquisitions could disrupt its business. On April 2, 2012, the Company acquired PhaseLink and is in the process of integrating its business with the Company’s business. In addition, the Company may in the future acquire other businesses, products or technologies to expand its product offerings and capabilities, customer base and business. Any of these transactions could be material to the Company’s financial condition and results of operations. The anticipated benefits of these acquisitions may never materialize. In addition, the process of integrating acquired businesses, products or technologies may create unforeseen operating difficulties and expenditures. Some of the areas where the Company may face acquisition-related risks include:

• diversion of management time and potential business disruptions;

• expenses, distractions and potential claims resulting from acquisitions, whether or not they are completed;

• retaining and integrating employees from any businesses that the Company may acquire;

• issuance of dilutive equity securities or incurrence of debt;

• integrating various accounting, management, information, human resource and other systems to permit effective management;

• incurring possible write-offs, impairment charges, contingent liabilities, amortization expense or write-offs of goodwill;

• difficulties integrating and supporting acquired products or technologies;

• unexpected capital expenditure requirements;

• insufficient revenues to offset increased expenses associated with the acquisition;

• opportunity costs associated with committing capital to such acquisitions; and

• acquisition-related litigation.

Foreign acquisitions involve risks in addition to those mentioned above, including those related to integration of operations across different cultures and languages, currency risks and the particular economic, political and regulatory risks associated with specific countries. The Company may not be able to address these risks successfully, or at all, without incurring significant costs, delays or other operating problems. The Company’s inability to address successfully such risks could disrupt its business, which could have a material adverse effect the Company’s financial condition and results of operations.

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ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

In February 2010, the Company’s Board of Directors approved a $15.0 million share repurchase program for calendar year 2010. In September 2010, the Company’s Board of Directors approved an increase to the amount authorized for repurchase from $15.0 million to $30.0 million. In November 2010, the Company’s Board of Directors approved an extension of termination date of the authorized repurchase plan from December 31, 2010 to the date on which the total authorized aggregate amount is expended. In May 2011, the Company announced that its Board of Directors authorized the repurchase of an additional $30 million of the Company’s common stock. The shares authorized for purchase under the new plan are in addition to the shares that may yet be purchased under the 2010 plan, which increased the total approval for repurchase to $60 million, and the total available for repurchase, as of June 30, 2012 to $9.0 million. On July 26, 2012, the Company announced that its Board of Directors authorized the repurchase of an additional $30.0 million of the Company’s common stock, which increased the total approval for repurchase to $90.0 million, and the total available for repurchase, as of June 30, 2012, to $39.0 million.

The authorization will stay in effect until the authorized aggregate amount is expended or the authorization is modified by the Board of Directors. The timing and amount of any repurchase of shares is determined by the Company’s management, based on its evaluation of market conditions and other factors. Share repurchases are recorded as a reduction of common stock to the extent available. Any amounts in excess of common stock are recorded as a reduction of retained earnings. Repurchases of the Company’s common stock during the first six months of 2012 were as follows:

ISSUER PURCHASES OF EQUITY SECURITIES

Period	Total Number of Shares Purchased		Average Price Paid per Share		Total Number of Shares Purchased as Part of a  Publicly Announced Program		Maximum Dollar Value of Shares that May Yet be Purchased Under the Program (in thousands)
January 2012		215,776	$	10.62		2,292,090	$	21,402
February 2012		88,719		11.21		994,812	$	20,407
March 2012		260,650		10.41		2,713,150	$	17,694
Total Q1 2012		565,145		10.62		6,000,052
April 2012		284,800		9.87		2,811,655	$	14,882
May 2012		271,400		10.41		2,825,066	$	12,057
June 2012		316,100		9.67		3,057,517	$	9,000
Total Q2 2012		872,300		9.97		8,694,238
Total		1,437,445	$	10.22		14,694,290

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ITEM 5. OTHER INFORMATION

On August 7, 2012, the Company entered into a Change of Control and Severance Agreement with James G. Gandenberger, the Company’s Vice President of Worldwide Operations and Foundry Business. Pursuant to the terms and conditions of the agreement, if Mr. Gandenberger is subject to constructive termination or termination without cause within 12 months after a change in control of the Company, Mr. Gandenberger would be entitled, subject to executing and not revoking a general release of claims, to (i) a cash lump sum, less applicable withholdings, equal to 12 months of his base salary then in effect, (ii) a cash lump sum, less applicable withholdings, equal to an estimated prorated share of his target annual bonus at the rate then in effect, (iii) payment or reimbursement of 12 months of healthcare coverage premiums and (iv) automatic vesting of each outstanding equity award, including, without limitation, each stock option and restricted stock unit award.

The foregoing summary of the agreement does not purport to be complete and is qualified in its entirety by reference to the agreement, which is attached as Exhibit 10.1 to this Form 10-Q and is incorporated by reference herein.

43

ITEM 6. EXHIBITS

Exhibit No.	Description
10.1	Change in Control and Severance Agreement, dated as of August 7, 2012, by and between Micrel, Incorporated and James G. Gandenberger
10.2	Micrel, Incorporated 2012 Equity Incentive Award Plan (incorporated by reference to Appendix A to the Company’s definitive proxy statement on Schedule 14A filed with the SEC on April 5, 2012).
31	Certifications of the Company’s Chief Executive Officer and Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32*	Certifications of the Company’s Chief Executive Officer and Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS**	XBRL Instance Document
101.SCH**	XBRL Taxonomy Extension Schema Document
101.CAL**	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF**	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB**	XBRL Taxonomy Extension Label Linkbase Document
101.PRE**	XBRL Taxonomy Extension Presentation Linkbase Document

* This certification accompanies this Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not be deemed “filed” by the Company for purposes of Section 18 of the Exchange Act.

** Pursuant to Rule 406T of Regulation S-T, these interactive data files are deemed not filed or part of a registration statement or prospectus for purposes of Section 11 or 12 of the Securities Act and are deemed not filed for purposes of Section 18 of the Exchange Act and otherwise are not subject to liability under these sections.

44

SIGNATURE

Pursuant to the requirements 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.

		MICREL, INCORPORATED
		(Registrant)
Date: August 8, 2012	By	/s/ Clyde R. Wallin
		Clyde R. Wallin
		Vice President, Finance and Chief Financial Officer
		(Authorized Officer and Principal Financial Officer)

45

EX-10.1

MICREL, INCORPORATED

CHANGE IN CONTROL AND SEVERANCE AGREEMENT

This Change in Control and Severance Agreement (the “Agreement”) is made and entered into by and between James G. Gandenberger (the “Executive”) and Micrel, Incorporated (the “Company”), effective as of the latest date set forth by the signatures of the parties hereto below (the “Effective Date”).

R E C I T A L S

A. It is expected that the Company from time to time will consider the possibility of an acquisition by another company or other change in control. The Board of Directors of the Company (the “Board”) recognizes that such consideration as well as the possibility of an involuntary termination or reduction in responsibility can be a distraction to Executive and can cause Executive to consider alternative employment opportunities. The Board has determined that it is in the best interests of the Company and its shareholders to assure that the Company will have the continued dedication and objectivity of Executive, notwithstanding the possibility, threat or occurrence of such an event.

B. The Board believes that it is in the best interests of the Company and its shareholders to provide Executive with an incentive to continue Executive’s employment and to motivate Executive to maximize the value of the Company upon a Change in Control (as defined below) for the benefit of its shareholders.

C. The Board believes that it is important to provide Executive with severance benefits upon certain terminations of Executive’s service to the Company that enhance Executive’s financial security and provide incentive and encouragement to Executive to remain with the Company notwithstanding the possibility of such an event.

D. Certain capitalized terms used in this Agreement are defined in Section 6 below.

The parties hereto agree as follows:

1. Term of Agreement. This Agreement shall become effective as of the Effective Date and terminate upon the date that all obligations of the parties hereto with respect to this Agreement have been satisfied.

2. At-Will Employment. The Company and Executive acknowledge that Executive’s employment is and shall continue to be “at-will,” as defined under applicable law. If Executive’s employment terminates for any reason, Executive shall not be entitled to any payments, benefits, damages, awards or compensation other than as provided by this Agreement.

3. Covered Termination During a Change in Control Period. If Executive experiences a Covered Termination during a Change in Control Period and if Executive executes and fails to revoke during any applicable revocation period a general release of all claims against the Company

and its affiliates within sixty (60) days, or such shorter period of time specified by the Company, following such Covered Termination (a “Release of Claims”), then in addition to any accrued but unpaid salary, bonus, vacation and expense reimbursement payable in accordance with applicable law, the Company shall provide Executive with the following:

(a) Severance. Executive shall be entitled to receive an amount to the sum equal to (i) twelve (12) months of Executive’s base salary at the rate in effect immediately prior to Executive’s termination of employment payable in a cash lump sum, less applicable withholdings, plus (ii) a pro-rated portion of the Executive’s targeted annual bonus through the date of Executive’s termination of employment, as soon as administratively practicable following the date the Release of Claims is not subject to revocation and, in any event, within sixty (60) days following the date of the Covered Termination.

(b) Acceleration. Each outstanding equity award, including, without limitation, each stock option, restricted stock unit and restricted stock award, held by Executive shall automatically become vested and, if applicable, exercisable and any forfeiture restrictions or rights of repurchase thereon shall immediately lapse. In all other respects the equity awards shall continue to be bound by and subject to the terms of their respective agreements.

(c) Continued Healthcare. If Executive elects to receive continued healthcare coverage pursuant to the provisions of the Consolidated Omnibus Budget Reconciliation Act of 1985, as amended (“COBRA”), the Company shall directly pay, or, at Executive’s request, reimburse Executive for, the premium for Executive and Executive’ s covered dependents through the twelve (12) month anniversary of the date of Executive’s termination of employment. After the Company ceases to pay premiums pursuant to the preceding sentence, Executive may, if eligible, elect to continue healthcare coverage at Executive’s expense in accordance the provisions of COBRA.

4. Other Terminations. If Executive’s service with the Company is terminated by the Company or by Executive for any or no reason other than as a Covered Termination during a Change in Control Period, then Executive shall not be entitled to any benefits hereunder other than accrued but unpaid salary, bonus, vacation and expense reimbursement in accordance with applicable law and to elect any continued healthcare coverage as may be required under COBRA or similar state law.

5. Limitation on Payments. Notwithstanding anything in this Agreement to the contrary, if any payment or distribution Executive would receive pursuant to this Agreement or otherwise (“Payment”) would (a) constitute a “parachute payment” within the meaning of Section 280G of the Internal Revenue Code of 1986, as amended (the “Code”), and (b) but for this sentence, be subject to the excise tax imposed by Section 4999 of the Code (the “Excise Tax”), then such Payment shall either be (i) delivered in full, or (ii) delivered as to such lesser extent which would result in no portion of such Payment being subject to the Excise Tax, whichever of the foregoing amounts, taking into account the applicable federal, state and local income taxes and the Excise Tax, results in the receipt by Executive on an after-tax basis, of the largest payment, notwithstanding that all or some portion the Payment may be taxable under Section 4999 of the Code. The accounting firm engaged by the Company for general audit purposes as of the day prior to the effective date of the

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Change in Control shall perform the foregoing calculations. The Company shall bear all expenses with respect to the determinations by such accounting firm required to be made hereunder. The accounting firm shall provide its calculations to the Company and Executive within fifteen (15) calendar days after the date on which Executive’s right to a Payment is triggered (if requested at that time by the Company or Executive) or such other time as requested by the Company or Executive. Any good faith determinations of the accounting firm made hereunder shall be final, binding and conclusive upon the Company and Executive. Any reduction in payments and/or benefits pursuant to this Section 5 will occur in the following order: (1) reduction of cash payments; (2) cancellation of accelerated vesting of equity awards other than stock options; (3) cancellation of accelerated vesting of stock options; and (4) reduction of other benefits payable to Executive.

6. Definition of Terms. The following terms referred to in this Agreement shall have the following meanings:

(a) Cause. “Cause” means (i) theft, dishonesty or falsification of any employment or Company records; (ii) malicious or reckless disclosure of the Company’s confidential or proprietary information; (iii) commission of any immoral or illegal act or any gross or willful misconduct, where the Board reasonably determines that such act or misconduct has (A) seriously undermined the ability of the Company’s Board or management to entrust Executive with important matters or otherwise work effectively with Executive, (B) contributed to the Company’s loss of significant revenues or business opportunities, or (C) significantly and detrimentally effected the business or reputation of the Company or any of its subsidiaries; and/or (iv) the failure or refusal by Executive to follow the reasonable and lawful directives of the Board or the Company’s Chief Executive Officer, provided such failure or refusal continues after Executive’s receipt of reasonable notice in writing of such failure or refusal and an opportunity to correct the problem. Notwithstanding the foregoing, “Cause” shall not exist where any of the foregoing are due to Executive’s physical or mental disability.

(b) Change in Control. “Change in Control” means the consummation of any of the following transactions: (i) a sale, transfer or disposition of all or substantially all of the Company’s assets other than to (A) a corporation or other entity of which at least a majority of its combined voting power is owned directly or indirectly by the Company, (B) a corporation or other entity owned directly or indirectly by the holders of capital stock of the Company in substantially the same proportions as their ownership of Common Stock, or (C) an Excluded Entity (as defined in subsection (ii) below); or (ii) any merger, consolidation or other business combination transaction of the Company with or into another corporation, entity or person, other than a transaction with or into another corporation, entity or person in which the holders of at least a majority of the shares of voting capital stock of the Company outstanding immediately prior to such transaction continue to hold (either by such shares remaining outstanding in the continuing entity or by their being converted into shares of voting capital stock of the surviving entity) a majority of the total voting power represented by the shares of voting capital stock of the Company (or the surviving entity) outstanding immediately after such transaction (an “Excluded Entity”); or (iii) an acquisition of any voting securities of the Company by any “person” (as the term “person” is used for purposes of Section 13(d) or Section 14(d) of the Securities Exchange Act of 1934, as amended (the “1934 Act”)) immediately after which such person has “beneficial ownership” (within the meaning of Rule 13d-3 promulgated under the 1934 Act) of fifty percent (50%) or more of the combined voting

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power of the Company’s then outstanding voting securities. Notwithstanding the foregoing, a transaction shall 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 hold the Company’s securities immediately before such transaction. Further notwithstanding the foregoing, a “Change in Control” must also constitute a “change in control event,” as defined in Treasury Regulation §1.409A-3(i)(5).

(c) Change in Control Period. “Change in Control Period” means the twelve (12) month period of time commencing upon a Change in Control.

(d) Constructive Termination. “Constructive Termination” means Executive’s resignation from employment with the Company after the occurrence, without Executive’s written consent, of any of the following: (i) a material reduction in Executive’s job responsibilities or duties, provided, however, that neither a mere change in title alone, nor reassignment following the consummation of a Change in Control to a position substantially similar to the position held prior to the transaction, shall constitute a material reduction in job responsibilities or duties; (ii) a reduction by the Company in Executive’s base salary of more than fifteen percent (15%) from Executive’s base salary in effect immediately prior to such reduction, except in connection with a reduction in salary affecting all senior management employees of the Company; or (iii) a material relocation of Executive’s office to a place more than fifty (50) miles from its then present location (which relocation shall be deemed to be material), except that required travel on the Company’s business to an extent substantially consistent with Executive’s business travel obligations as of immediately prior to the date of the Change in Control shall not be considered a relocation. Notwithstanding the foregoing, a resignation shall not constitute a “Constructive Termination” unless the event or condition giving rise to such resignation continues more than thirty (30) days following Executive’s written notice of such condition provided to the Company within ninety (90) days of the first occurrence of such event or condition and such resignation is effective within thirty (30) days following the end of such notice period.

(e) Covered Termination. “Covered Termination” shall mean Executive’s Constructive Termination or the termination of Executive’s employment by the Company other than for Cause.

7. Successors.

(a) Company’s Successors. Any successor to the Company (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 shall 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 successor to the Company’s business and/or assets which executes and delivers the assumption agreement described in this Section 9(a) or which becomes bound by the terms of this Agreement by operation of law.

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(b) Executive’s Successors. The terms of this Agreement and all rights of Executive hereunder shall inure to the benefit of, and be enforceable by, Executive’s personal or legal representatives, executors, administrators, successors, heirs, distributees, devisees and legatees.

8. Notices. Notices and all other communications contemplated by this Agreement shall be in writing and shall be deemed to have been duly given when personally delivered or one day following mailing via Federal Express or similar overnight courier service. In the case of Executive, mailed notices shall be addressed to Executive at Executive’s home address that the Company has on file for Executive. In the case of the Company, mailed notices shall be addressed to its corporate headquarters, and all notices shall be directed to the attention of its General Counsel.

9. Confidentiality; Non-Solicitation.

(a) Confidentiality. While Executive is employed by the Company, and thereafter, Executive shall not directly or indirectly disclose or make available to any person, firm, corporation, association or other entity for any reason or purpose whatsoever, any Confidential Information (as defined below). Upon termination of Executive’s employment with the Company, all Confidential Information in Executive’s possession that is in written or other tangible form (together with all copies or duplicates thereof, including computer files) shall be returned to the Company and shall not be retained by Executive or furnished to any third party, in any form except as provided herein; provided, however, that Executive shall not be obligated to treat as confidential, or return to the Company copies of any Confidential Information that (i) was publicly known at the time of disclosure to Executive, (ii) becomes publicly known or available thereafter other than by any means in violation of this Agreement or any other duty owed to the Company by any person or entity, or (iii) is lawfully disclosed to Executive by a third party. For purposes of this Agreement, the term “Confidential Information” shall mean information disclosed to Executive or known by Executive as a consequence of or through his or her relationship with the Company, about the customers, employees, business methods, public relations methods, organization, procedures or finances, including, without limitation, information of or relating to customer lists, of the Company and its affiliates. In addition, Executive shall continue to be subject to the Confidential Information and Invention Assignment Agreement entered into between Executive and the Company (the “Confidential Information Agreement”).

(b) Non-Solicitation of Employees or Customers. Executive acknowledges that as a member of senior management of the Company he has had access to information concerning the Company’s organizational structure and performance evaluations of Company key employees. During his employment with the Company and at all times thereafter, Executive shall not utilize any Trade Secrets of the Company to solicit any of its employees or contractors to discontinue working for the Company or to provide service to any other person or entity in competition with the Company without the Company’s written consent. Furthermore, beginning on the last day of his employment with the Company and at all times thereafter, Executive shall not utilize any Trade Secrets of the Company to solicit, contact, attempt to contact or meet with the Company’s current customers for purposes of offering or accepting goods or services similar to or competitive with those offered by the Company. As used in this Agreement, the term “Trade Secrets” shall mean information that (a) derives economic value from not being known to the general public or others who can obtain economic value from its disclosure or use and (b) is the subject of reasonable efforts

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on the part of the Company to maintain its secrecy. Executive acknowledges and agrees that Trade Secrets are also Confidential Information and that he is under at least the same confidentiality obligations in relation to Trade Secrets as he is in relation to Confidential Information.

(c) Survival of Provisions. The provisions of this Section 9 shall survive the termination or expiration of the applicable Executive’s employment with the Company and shall be fully enforceable thereafter. If it is determined by a court of competent jurisdiction in any state that any restriction in this Section 9 is excessive in duration or scope or is unreasonable or unenforceable under the laws of that state, it is the intention of the parties that such restriction may be modified or amended by the court to render it enforceable to the maximum extent permitted by the law of that state.

10. Dispute Resolution. To ensure the timely and economical resolution of disputes that arise in connection with this Agreement, Executive and the Company agree that any and all disputes, claims, or causes of action arising from or relating to the enforcement, breach, performance or interpretation of this Agreement, Executive’s employment, or the termination of Executive’s employment, shall be resolved to the fullest extent permitted by law by final, binding and confidential arbitration, by a single arbitrator, in Santa Clara County, California, conducted by Judicial Arbitration and Mediation Services, Inc. (“JAMS”) under the applicable JAMS employment rules. By agreeing to this arbitration procedure, both Executive and the Company waive the right to resolve any such dispute through a trial by jury or judge or administrative proceeding. The arbitrator shall: (i) have the authority to compel adequate discovery for the resolution of the dispute and to award such relief as would otherwise be permitted by law; and (ii) issue a written arbitration decision, to include the arbitrator’s essential findings and conclusions and a statement of the award. The arbitrator shall be authorized to award any or all remedies that Executive or the Company would be entitled to seek in a court of law. The Company shall pay all JAMS’ arbitration fees in excess of the amount of court fees that would be required if the dispute were decided in a court of law. Nothing in this Agreement is intended to prevent either Executive or the Company from obtaining injunctive relief in court to prevent irreparable harm pending the conclusion of any such arbitration. Notwithstanding the foregoing, Executive and the Company each have the right to resolve any issue or dispute over intellectual property rights by Court action instead of arbitration.

11. Miscellaneous Provisions.

(a) Section 409A.

(i) Separation from Service. Notwithstanding any provision to the contrary in this Agreement, no amount deemed deferred compensation subject to Section 409A of the Code shall be payable pursuant to Section 3 unless Executive’s termination of employment constitutes a “separation from service” with the Company within the meaning of Section 409A of the Code and the Department of Treasury regulations and other guidance promulgated thereunder (“Separation from Service”) and, except as provided under Section 13(a)(ii) of this Agreement, any such amount shall not be paid, or in the case of installments, commence payment, until the sixtieth (60^th) day following Executive’s Separation from Service. Any installment payments that would have been made to Executive during the sixty (60) day period immediately following Executive’s Separation from Service but for the preceding sentence shall be paid to Executive on the sixtieth (60^th) day following Executive’s Separation from Service and the remaining payments shall be made as provided in this Agreement.

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(ii) Specified Employee. Notwithstanding any provision to the contrary in this Agreement, if Executive is deemed at the time of his separation from service to be a “specified employee” for purposes of Section 409A(a)(2)(B)(i) of the Code, to the extent delayed commencement of any portion of the benefits to which Executive is entitled under this Agreement is required in order to avoid a prohibited distribution under Section 409A(a)(2)(B)(i) of the Code, such portion of Executive’s benefits shall not be provided to Executive prior to the earlier of (a) the expiration of the six (6)-month period measured from the date of the Executive’s Separation from Service or (b) the date of Executive’s death. Upon the first business day following the expiration of the applicable Code Section 409A(a)(2)(B)(i) period, all payments deferred pursuant to this Section 13(a)(ii) shall be paid in a lump sum to Executive, and any remaining payments due under this Agreement shall be paid as otherwise provided herein.

(iii) Expense Reimbursements. To the extent that any reimbursements payable pursuant to this Agreement are subject to the provisions of Section 409A of the Code, any such reimbursements payable to Executive pursuant to this Agreement shall be paid to Executive no later than December 31 of the year following the year in which the expense was incurred, the amount of expenses reimbursed in one year shall not affect the amount eligible for reimbursement in any subsequent year, and Executive’s right to reimbursement under this Agreement will not be subject to liquidation or exchange for another benefit.

(iv) Installments. For purposes of Section 409A of the Code (including, without limitation, for purposes of Treasury Regulation Section 1.409A-2(b)(2)(iii)), Executive’s right to receive any installment payments under this Agreement shall be treated as a right to receive a series of separate payments and, accordingly, each such installment payment shall at all times be considered a separate and distinct payment.

(b) Waiver. No provision of this Agreement shall be modified, waived or discharged unless the modification, waiver or discharge is agreed to in writing and signed by Executive and by an authorized officer of the Company (other than Executive). No waiver by either party of any breach of, or of compliance with, any condition or provision of this Agreement by the other party shall be considered a waiver of any other condition or provision or of the same condition or provision at another time.

(c) Whole Agreement. This Agreement and the Confidential Information Agreement represent the entire understanding of the parties hereto with respect to the subject matter hereof and supersede all prior arrangements and understandings regarding same, including, without limitation, any accelerated vesting provisions of Executive’s offer letter agreement and/or stock option agreement.

(d) Choice of Law. The validity, interpretation, construction and performance of this Agreement shall be governed by the laws of the State of California.

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(e) Severability. The invalidity or unenforceability of any provision or provisions of this Agreement shall not affect the validity or enforceability of any other provision hereof, which shall remain in full force and effect.

(f) Counterparts. This Agreement may be executed in counterparts, each of which shall be deemed an original, but all of which together will constitute one and the same instrument.

(Signature page follows)

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IN WITNESS WHEREOF, each of the parties has executed this Agreement, in the case of the Company by its duly authorized officer, as of the day and year set forth below.

MICREL, INCORPORATED
By:	/s/ Raymond D. Zinn
	Raymond D. Zinn
Title:	President, Chief Executive
	Officer and Chairman of the Board
Date:	August 7, 2012
EXECUTIVE
/s/ James G. Gandenberger
James G. Gandenberger
Date: July 30, 2012

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EX-31

EXHIBIT 31

Certification of Chief Executive Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Raymond D. Zinn, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Micrel, Incorporated;

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 the Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) designed such internal control over financial reporting, or caused such internal control over financial control to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation;

d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer 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 registrant’s board of directors (or persons performing the equivalent function):

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: August 8, 2012	By	/s/ Raymond D. Zinn
		Raymond D. Zinn
		President, Chief Executive Officer and Director
		(Principal Executive Officer)

Certification of Chief Financial Officer

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Clyde R Wallin, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Micrel, Incorporated;

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 the Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) designed such internal control over financial reporting, or caused such internal control over financial control to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation;

d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer 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 registrant’s board of directors (or persons performing the equivalent function):

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: August 8, 2012	By	/s/ Clyde R. Wallin
		Clyde R. Wallin
		Vice President, Finance and
		Chief Financial Officer
		(Principal Financial and Accounting Officer)

EX-32

EXHIBIT 32

Certification of Chief Executive Officer

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Micrel, Incorporated (the “Company”) hereby certifies, to such officer’s knowledge, that:

(i) the accompanying Quarterly Report on Form 10-Q of the Company for the quarterly period ended June 30, 2012 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: August 8, 2012	By	/s/ Raymond D. Zinn
		Raymond D. Zinn
		Chief Executive Officer

Certification of Chief Financial Officer

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. § 1350, as created by Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Micrel, Incorporated (the “Company”) hereby certifies, to such officer’s knowledge, that:

(i) the accompanying Quarterly Report on Form 10-Q of the Company for the quarterly period ended June 30, 2012 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: August 8, 2012	By	/s/ Clyde R. Wallin
		Clyde R. Wallin
		Chief Financial Officer

XML

Acquisition (Details1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Apr. 02, 2012
Acquisition, Intangible assets
Fair value		$ 8,730
Accumulated Amortization	(275)
Total	8,455
Developed technology [Member]
Acquisition, Intangible assets
Fair value		4,400
Accumulated Amortization	(110)
Total	4,290
Customer relationships [Member]
Acquisition, Intangible assets
Fair value		3,000
Accumulated Amortization	(75)
Total	2,925
Trademarks [Member]
Acquisition, Intangible assets
Fair value		510
Accumulated Amortization	(38)
Total	472
Non-competition agreement [Member]
Acquisition, Intangible assets
Fair value		410
Accumulated Amortization	(52)
Total	358
In-process research and development [Member]
Acquisition, Intangible assets
Fair value		410
Accumulated Amortization
Total	$ 410

XML

Other Current Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Schedule of other current liabilities
Accrued compensation	$ 4,195	$ 4,997
Accrued commissions	2,321	1,964
Accrued workers compensation and health insurance	981	987
All other current accrued liabilities	1,768	1,381
Total other current liabilities	$ 9,265	$ 9,329

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Inventories (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Inventories
Finished goods	$ 8,522	$ 11,824
Work in process	27,855	22,863
Raw materials	1,327	1,599
Total inventories	$ 37,704	$ 36,286

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Borrowing Arrangements (Details) (USD $)	6 Months Ended
	Jun. 30, 2012 Installment Term_Loans	May 31, 2009
Borrowing Arrangements (Additional Textual) [Abstract]
Line of credit available for general working capital needs	$ 5,000,000
Foreign exchange sub-facility	2,000,000
Interest rates under the amended agreement variable alternate base rate	1.00%
Fed Funds Rate	0.50%
Daily adjusted one-month LIBOR	1.00%
Interest rates under the amended agreement, fixed	2.00%
Loan facility to finance the repurchase of shares of the Company's common stock		15,000,000
Borrowings under the line of credit	15,000,000
Letter of credit sub-facility	5,000,000
Number of equal monthly installments for borrowings	21
Number of term loans under acquisition	2
PhaseLink Acquisition [Member]
Borrowing Arrangements (Textual) [Abstract]
Loans acquired with local bank in Taiwan	$ 282,000
Maximum [Member]
Borrowing Arrangements (Textual) [Abstract]
Expiration date of the line of credit extended	Apr. 30, 2013
Interest rates under the amended agreement, floating	2.25%
Minimum [Member]
Borrowing Arrangements (Textual) [Abstract]
Expiration date of the line of credit extended	Apr. 30, 2011
Interest rates under the amended agreement, floating	2.00%

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Investments (Details 2) (Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Member], USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Member]
Schedule of changes in Level 3 securities
Beginning balance, December 31, 2011	$ 6,857
Transfers in and/or out of Level 3
Total gains, before tax	23
Settlements	(100)
Ending balance, June 30, 2012	$ 6,780

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Goodwill and Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2012

Goodwill and Intangible Assets [Abstract]

Schedule of goodwill and intangible assets

	Carrying Amount as of March 31, 2012		Additions at Cost April 2, 2012		Carrying Amount as of June 30, 2012		Accumulated Amortization as of June 30, 2012			Net Carrying Amount as of June 30, 2012
Developed technology	$	—	$	4,400	$	4,400	$	(110	)	$	4,290
Customer relationships		—		3,000		3,000		(75	)		2,925
Trademarks		—		510		510		(38	)		472
Non-competition agreements		—		410		410		(52	)		358
In-process research and development		—		410		410		—			410
	$	—	$	8,730	$	8,730	$	(275	)	$	8,455

Schedule of future amortization expenses

Year Ending December 31,
2012 (remaining six months)	$	549
2013		1,098
2014		881
2015		808
2016		808
Thereafter		4,311
	$	8,455

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Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net Revenues by Segment
Total net revenues	$ 63,699	$ 68,510	$ 124,850	$ 136,004
Total net revenues	100.00%	100.00%	100.00%	100.00%
Standard Products [Member]
Net Revenues by Segment
Total net revenues	61,204	65,808	120,003	131,379
Total net revenues	96.00%	96.00%	96.00%	97.00%
Other Products [Member]
Net Revenues by Segment
Total net revenues	$ 2,495	$ 2,702	$ 4,847	$ 4,625
Total net revenues	4.00%	4.00%	4.00%	3.00%

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Subsequent Events

6 Months Ended

Jun. 30, 2012

Subsequent Events [Abstract]

SUBSEQUENT EVENTS

18. SUBSEQUENT EVENTS

On July 26, 2012, the Company’s Board of Directors declared a cash dividend of $0.04 per outstanding share of common stock payable on August 24, 2012 to shareholders of record at the close of business on August 10, 2012. This dividend will be recorded in the third quarter of 2012 and is expected to be approximately $2.4 million.

On July 26, 2012, the Company announced that its Board of Directors has authorized the repurchase of an additional $30.0 million of the Company’s common stock. This new authorization increased the total available for repurchase under the Company’s repurchase plans to an aggregate of $39.0 million.

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Property, Plant and Equipment (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Property, Plant and Equipment (Textual) [Abstract]
Depreciation	$ 3.1	$ 5.8

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Share-Based Compensation (Details 1)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Stock options granted under the Company's option plans
Expected term (years)	5 years 9 months 18 days	5 years 7 months 6 days	5 years 9 months 18 days	5 years 8 months 12 days
Stock volatility	35.90%	39.80%	36.20%	40.10%
Risk free interest rates	0.90%	2.00%	1.10%	2.20%
Dividends during expected terms	1.70%	1.30%	1.60%	1.20%

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Significant Accounting Policies (Details Textual) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Significant Accounting Policies (Textual) [Abstract]
Stock options excluded from the weighted-average number of common shares outstanding for the diluted net income per share computations as they were anti-dilutive	5.5	3.6	5.3	2.9

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Goodwill and Intangible Assets (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Jun. 30, 2012
Schedule of future amortization expenses
2012 (remaining six months)	$ 549
2013	1,098
2014	881
2015	808
2016	808
Thereafter	4,311
Total		$ 8,455

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Dividends (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	May 23, 2012
Dividends (Textual) [Abstract]
Board of Directors declared a cash dividend	$ 0.040	$ 0.035	$ 0.080	$ 0.070
Payment to shareholders	$ 2.4		$ 2.4		$ 2.5

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Investments (Details Textual) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Investments (Textual) [Abstract]
Comprehensive income net of tax due to auction rate notes	$ 109,000	$ 590,000	$ 169,000	$ 651,000
Investments (Additional Textual) [Abstract]
Short-term interest rate reset dates of auction rate note securities			less than 90 days
Auction rate note securities with contractual maturities			excess of ten years
Reset period for the securities held			seven or twenty eight days
Temporary impairment of these securities to accumulated other comprehensive income pre tax			200,000
Temporary impairment of these securities to accumulated other comprehensive income Net of tax			300,000
Short-term Investments [Member]
Investments (Textual) [Abstract]
Maturity period for long-term investments purchased			12 months or greater
Unrealized loss on short-term investments	52,900,000		52,900,000
Maximum [Member]
Investments (Textual) [Abstract]
Maturity period for short-term investments purchased			12 months
Period for principal repayments by issuer	35 years		35 years
Minimum [Member]
Investments (Textual) [Abstract]
Maturity period for short-term investments purchased			3 months
Period for principal repayments by issuer	20 years		20 years
Fair Value Measurements Using Significant Unobservable Inputs (Level 3) [Member]
Investments (Textual) [Abstract]
Fair value of auction rate notes	7,700,000		7,700,000
Auction rate notes [Member]
Investments (Textual) [Abstract]
Comprehensive income net of tax due to auction rate notes	600,000
Comprehensive income before tax due to auction rate notes	$ 900,000
Auction rate notes [Member] | Maximum [Member]
Investments (Textual) [Abstract]
Maximum interest rate for the auction rate notes' held	1.50%		1.50%

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Recently Issued Accounting Standards

6 Months Ended

Jun. 30, 2012

Recently Issued Accounting Standards [Abstract]

RECENTLY ISSUED ACCOUNTING STANDARDS

2. RECENTLY ISSUED ACCOUNTING STANDARDS

There have been no developments to recently issued accounting standards, including the expected dates of adoption and estimated effects on the Company’s consolidated financial statements, from those disclosed in the Company’s 2011 Annual Report on Form 10-K.

Effective January 1, 2012, the Company adopted the new accounting standard on fair value measurements that clarifies the application of existing guidance and disclosure requirements, changes certain fair value measurement principles and requires additional disclosures about fair value measurements. The adoption did not have an impact on the Company’s consolidated financial position or results of operations.

Effective January 1, 2012, the Company adopted the new standard that requires the presentation of comprehensive income, the components of net income and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. The new standard also requires presentation of adjustments for items that are reclassified from other comprehensive income to net income in the statement where the components of net income and the components of other comprehensive income are presented. In December 2011, an amendment was issued that defers the requirement to present reclassification adjustments out of accumulated other comprehensive income on the face of the consolidated statement of income. The adoption concerns presentation and disclosure only and did not have an impact on the Company’s consolidated financial position or results of operations.

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Subsequent Events (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	1 Months Ended		6 Months Ended	12 Months Ended
	Jul. 31, 2012	Feb. 28, 2010	Sep. 30, 2010	Dec. 31, 2010	Aug. 24, 2012	Jul. 26, 2012	Jun. 30, 2012	May 23, 2012
Subsequent Events (Textual) [Abstract]
Board of Directors declared a cash dividend payable					$ 0.04
Payment to shareholders							$ 2.4	$ 2.5
Repurchase of additional common stock authorized by Board of Directors	30.0	15.0	30.0	30.0
Total value of repurchase common stock						$ 39.0

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Share-Based Compensation (Details Textual) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Share-Based Compensation (Textual) [Abstract]
Weighted average fair values of Restricted Stock Units granted			$ 2.95	$ 5.37
Share-Based Compensation (Additional Textual) [Abstract]
Stock options granted	645,400	749,471	783,820	1,802,371
Weighted average fair values of options granted	$ 2.92	$ 4.65
Unrecognized share-based compensation related to non-vested stock option awards	$ 17,000,000		$ 17,000,000
Weighted-average period for unrecognized share-based compensation			4 years 4 months 24 days
Total share-based compensation capitalized as part of inventory	$ 177,000	$ 174,000	$ 177,000	$ 174,000
Purchase shares of Common Stock with respect to market value of stock	95.00%
Restricted Stock [Member]
Share-Based Compensation (Textual) [Abstract]
Restricted Stock Units granted	211,086	67,153	256,086	162,153
Weighted average fair values of Restricted Stock Units granted	$ 9.73	$ 10.91	$ 9.76	$ 11.85

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Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Share-Based Compensation [Abstract]

Share-based compensation expense

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Cost of revenues	$	282		$	284		$	566		$	526
Research and development		812			525			1,557			1,051
Selling, general and administrative		815			503			1,568			1,108
Pre-tax share-based compensation expense		1,909			1,312			3,691			2,685
Less income tax effect		(679	)		(449	)		(1,305	)		(992	)
Net share-based compensation expense	$	1,230		$	863		$	2,386		$	1,693

Stock options granted under the Company's option plans

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Expected term (years)		5.8			5.6			5.8			5.7
Stock volatility		35.9	%		39.8	%		36.2	%		40.1	%
Risk free interest rates		0.9	%		2.0	%		1.1	%		2.2	%
Dividends during expected terms		1.7	%		1.3	%		1.6	%		1.2	%

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Acquisition (Tables)

6 Months Ended

Jun. 30, 2012

Acquisition [Abstract]

Acquisition, Purchase Price Allocation

Cash and cash equivalents	$	3,255
Accounts receivable		1,119
Inventories		1,320
Other assets		273
Property, plant and equipment		1,734
Developed technology		4,400
Customer relationships		3,000
Trademarks		510
Non-competition agreements		410
In-process research and development		410
Goodwill		6,088
Short-term debt		(282	)
Other liabilities		(1,566	)
Noncontrolling interest		(977	)
Total purchase consideration	$	19,694

Acquisition, Intangible assets

	Fair Value as of Acquisition Date April 2, 2012		Accumulated Amortization as of June 30, 2012			Net Carrying Amount as of June 30, 2012
Developed technology	$	4,400	$	(110	)	$	4,290
Customer relationships		3,000		(75	)		2,925
Trademarks		510		(38	)		472
Non-competition agreements		410		(52	)		358
In-process research and development		410		—			410
Total	$	8,730	$	(275	)	$	8,455

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Significant Customers (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
World wide distributors 1 [Member]
Significant Customers (Textual) [Abstract]
Net revenues	$ 31.5	$ 28.7
Percentage of net revenues	25.00%	21.00%
Percentage of accounts receivable	30.00%		23.00%
World wide distributors 2 [Member]
Significant Customers (Textual) [Abstract]
Net revenues	20.8	24.0
Percentage of net revenues	17.00%	18.00%
Percentage of accounts receivable	13.00%		10.00%
Asian based stocking [Member]
Significant Customers (Textual) [Abstract]
Percentage of accounts receivable			11.00%
OEM [Member]
Significant Customers (Textual) [Abstract]
Net revenues	$ 13.3
Percentage of net revenues	11.00%

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Investments (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Summary of short-term investments
Cost	$ 83,667	$ 77,726
Gross Gains
Gross Losses	(310)	(461)
Fair Value	83,357	77,265
Municipal Securities [Member]
Summary of short-term investments
Cost	13,123	11,413
Gross Gains
Gross Losses	(76)	(115)
Fair Value	13,047	11,298
Certificates of Deposits [Member]
Summary of short-term investments
Cost	23,135	23,071
Gross Gains
Fair Value	23,135	23,071
Corporate Debt Securities [Member]
Summary of short-term investments
Cost	33,418	33,723
Gross Gains
Gross Losses	(206)	(327)
Fair Value	33,212	33,396
Commercial Paper [Member]
Summary of short-term investments
Cost	9,468	4,991
Gross Gains
Gross Losses	(7)	(2)
Fair Value	9,461	4,989
U.S. Agencies [Member]
Summary of short-term investments
Cost	4,523	4,528
Gross Gains
Gross Losses	(21)	(17)
Fair Value	$ 4,502	$ 4,511

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Investments (Tables)

6 Months Ended

Jun. 30, 2012

Investments [Abstract]

Summary of short-term investments

	As of June 30, 2012									As of December 31, 2011
	Cost		Gross Gains		Gross Losses			Fair Value		Cost		Gross Gains		Gross Losses			Fair Value
Municipal Securities	$	13,123		—	$	(76	)	$	13,047	$	11,413		—	$	(115	)	$	11,298
Corporate Debt Securities		33,418		—		(206	)		33,212		33,723		—		(327	)		33,396
Commercial Paper		9,468		—		(7	)		9,461		4,991		—		(2	)		4,989
U.S. Agencies		4,523		—		(21	)		4,502		4,528		—		(17	)		4,511
Certificates of Deposits		23,135		—		—			23,135		23,071		—		—			23,071
Total	$	83,667	$	—	$	(310	)	$	83,357	$	77,726	$	—	$	(461	)	$	77,265

Schedule of financial assets measured at fair value on a recurring basis

Financial assets measured at fair value on a recurring basis as of June 30, 2012 were as follows (in thousands):

	Quoted Prices in Active Markets for Identical Assets Level 1		Significant Other Observable Inputs Level 2		Significant Unobservable Inputs Level 3		Total
Money Market Funds	$	24,441		—		—	$	24,441
Certificates of Deposits		23,135		—		—		23,135
Corporate Debt Securities		—		33,212		—		33,212
Commercial Paper		—		9,461		—		9,461
Municipal Securities		—		13,047		—		13,047
U.S. Agencies		—		4,502		—		4,502
Auction rate notes		—		—		6,780		6,780
Total	$	47,576	$	60,222	$	6,780	$	114,578

Financial assets measured at fair value on a recurring basis as of December 31, 2011 were as follows (in thousands):

	Quoted Prices in Active Markets for Identical Assets Level 1		Significant Other Observable Inputs Level 2		Significant Unobservable Inputs Level 3		Total
Money Market Funds	$	55,912		—		—	$	55,912
Certificates of Deposits		23,071		—		—		23,071
Corporate Debt Securities		—		33,396		—		33,396
Commercial Paper		—		4,990		—		4,990
Municipal Securities		—		11,297		—		11,297
U.S. Agencies		—		4,511		—		4,511
Auction rate notes		—		—		6,857		6,857
Total	$	78,983	$	54,194	$	6,857	$	140,034

Schedule of changes in Level 3 securities

	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Beginning balance, December 31, 2011	$	6,857
Transfers in and/or out of Level 3		—
Total gains, before tax		23
Settlements		(100	)
Ending balance, June 30, 2012	$	6,780

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Inventories (Tables)

6 Months Ended

Jun. 30, 2012

Inventories [Abstract]

Inventories

	June  30, 2012		December  31, 2011
Finished goods	$	8,522	$	11,824
Work in process		27,855		22,863
Raw materials		1,327		1,599
Total inventories	$	37,704	$	36,286

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Significant Accounting Policies

6 Months Ended

Jun. 30, 2012

Significant Accounting Policies [Abstract]

SIGNIFICANT ACCOUNTING POLICIES

1. SIGNIFICANT ACCOUNTING POLICIES

Interim Financial Information - The accompanying condensed consolidated financial statements of Micrel, Incorporated and its wholly-owned and majority-owned subsidiaries (together “Micrel” or the “Company”) as of June 30, 2012 and for the three and six months ended June 30, 2012 and 2011 are unaudited. In the opinion of management, the condensed consolidated financial statements include all adjustments (consisting only of normal recurring accruals) that management considers necessary for a fair statement of its financial position, operating results, comprehensive income and cash flows for the interim periods presented. Operating results and cash flows for interim periods are not necessarily indicative of results for the entire year. The Condensed Consolidated Balance Sheet as of December 31, 2011, was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted (“GAAP”) in the United States of America. These financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011. These financial statements should also be read in conjunction with the Company’s critical accounting policies included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011 and those included in this Form 10-Q below.

Net Income Per Common and Equivalent Share - Basic net income per share is computed by dividing net income attributable to Micrel, Incorporated shareholders by the number of weighted-average common shares outstanding. Diluted net income per share reflects potential dilution from outstanding stock options using the treasury stock method. Reconciliation of weighted-average shares used in computing net income per share attributable to Micrel, Incorporated shareholders is as follows (in thousands):

	Three Months Ended June  30,				Six Months Ended June 30,
	2012		2011		2012		2011
Weighted average common shares outstanding		60,217		62,167		60,533		62,007
Dilutive effect of stock options outstanding using the treasury stock method		620		860		686		1,050
Shares used in computing diluted net income per share attributable to Micrel, Incorporated shareholders		60,837		63,027		61,219		63,057

For the three and six months ended June 30, 2012, 5.5 million stock options and 5.3 million stock options, respectively, have been excluded from the weighted-average number of common shares outstanding for the diluted net income per share computations as they were anti-dilutive. For the three and six months ended June 30, 2011, 3.6 million stock options and 2.9 million stock options, respectively, have been excluded from the weighted-average number of common shares outstanding for the diluted net income per share computations as they were anti-dilutive.

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Property, Plant and Equipment (Tables)

6 Months Ended

Jun. 30, 2012

Property, Plant and Equipment [Abstract]

Property, plant and equipment

	June 30, 2012			December 31, 2011
Manufacturing equipment	$	174,041		$	170,304
Land		8,101			8,101
Buildings and improvements		53,790			53,539
Office furniture and research equipment		19,663			17,834
		255,595			249,778
Accumulated depreciation		(194,668	)		(188,894	)
Total property, plant and equipment, net	$	60,927		$	60,884

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Acquisition (Details Textual) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
Acquisition (Textual) [Abstract]
Date of acquisition agreement	Mar. 15, 2012
Acquisition effective date	Apr. 02, 2012	Apr. 02, 2012
percentage of outstanding shares acquired	95.00%
Cost of outstanding shares acquired	$ 19,694,000	$ 19,694,000
Cash received for shares acquired	3,255,000	3,255,000
Acquisition costs	82,000	82,000
Net cash acquired in acquisition	$ 16,400,000	$ 16,400,000
Non-competition agreement [Member]
Acquisition (Textual) [Abstract]
Identifiable intangible assets estimated useful life		2 years
Developed Technology and Customer Relationship [Member]
Acquisition (Textual) [Abstract]
Identifiable intangible assets estimated useful life	10 years
Maximum [Member] | Trademarks [Member]
Acquisition (Textual) [Abstract]
Identifiable intangible assets estimated useful life		5 years
Minimum [Member] | Trademarks [Member]
Acquisition (Textual) [Abstract]
Identifiable intangible assets estimated useful life		2 years

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Goodwill and Intangible Assets (Details Textual) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012	Apr. 02, 2012
Goodwill and Intangible Assets (Textual) [Abstract]
Date of acquisition	Apr. 02, 2012	Apr. 02, 2012
Goodwill	$ 6,088,000	$ 6,088,000	$ 6,100,000
Total intangible amortization expense	$ 275,000

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Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
CURRENT ASSETS:
Cash and cash equivalents	$ 36,073	$ 60,610
Short-term investments	83,357	77,265
Accounts receivable, less allowances: 2012, $1,444; 2011, $1,294	31,067	25,385
Inventories	37,704	36,286
Income taxes receivable		6,881
Prepaid expenses and other	1,987	2,883
Deferred income taxes	23,161	22,854
Total current assets	213,349	232,164
LONG-TERM INVESTMENTS	6,780	6,857
PROPERTY, PLANT AND EQUIPMENT, NET	60,927	60,884
GOODWILL	6,088
INTANGIBLE ASSETS, NET	8,455
DEFERRED INCOME TAXES	10,009	8,657
OTHER ASSETS	2,510	1,413
TOTAL	308,118	309,975
CURRENT LIABILITIES:
Accounts payable	16,293	17,096
Deferred income on shipments to distributors	30,766	30,671
Other current liabilities	9,265	9,329
Total current liabilities	56,324	57,096
LONG-TERM INCOME TAXES PAYABLE	6,471	6,450
LONG- TERM DEFFERED INCOME TAXES	890
Total liabilities	63,685	63,546
COMMITMENTS AND CONTINGENCIES (Note 14)
MICREL, INCORPORATED SHAREHOLDERS' EQUITY:
Preferred stock, no par value - authorized: 5,000,000 shares; issued and outstanding: none
Common stock, no par value - authorized: 250,000,000 shares; issued and outstanding: 2012 - 59,808,482 shares; 2011 - 61,038,507 shares		206
Accumulated other comprehensive loss	(783)	(887)
Retained earnings	244,235	247,110
Total Micrel, Incorporated shareholders' equity	243,452	246,429
NON CONTROLLING INTEREST	981
Total shareholders' equity	244,433	246,429
TOTAL	$ 308,118	$ 309,975

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Investments (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Schedule of financial assets measured at fair value on a recurring basis
Total	$ 114,578	$ 140,034
Money Market Funds [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total	24,441	55,912
Certificates of Deposits [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total	23,135	23,071
Municipal Securities [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total	13,047	11,297
Corporate Debt Securities [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total	33,212	33,396
Commercial Paper [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total	9,461	4,990
U.S. Agencies [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total	4,502	4,511
Auction rate notes [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total	6,780
Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total	47,576	78,983
Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Money Market Funds [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total	24,441	55,912
Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Certificates of Deposits [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total	23,135	23,071
Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Municipal Securities [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total
Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Corporate Debt Securities [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total
Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Commercial Paper [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total
Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | U.S. Agencies [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total
Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Auction rate notes [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total
Significant Other Observable Inputs Level 2 [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total	60,222	54,194
Significant Other Observable Inputs Level 2 [Member] | Money Market Funds [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total
Significant Other Observable Inputs Level 2 [Member] | Certificates of Deposits [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total
Significant Other Observable Inputs Level 2 [Member] | Municipal Securities [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total	13,047	11,297
Significant Other Observable Inputs Level 2 [Member] | Corporate Debt Securities [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total	33,212	33,396
Significant Other Observable Inputs Level 2 [Member] | Commercial Paper [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total	9,461	4,990
Significant Other Observable Inputs Level 2 [Member] | U.S. Agencies [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total	4,502	4,511
Significant Other Observable Inputs Level 2 [Member] | Auction rate notes [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total
Significant Unobservable Inputs Level 3 [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total	6,780	6,857
Significant Unobservable Inputs Level 3 [Member] | Money Market Funds [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total
Significant Unobservable Inputs Level 3 [Member] | Certificates of Deposits [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total
Significant Unobservable Inputs Level 3 [Member] | Municipal Securities [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total
Significant Unobservable Inputs Level 3 [Member] | Corporate Debt Securities [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total
Significant Unobservable Inputs Level 3 [Member] | Commercial Paper [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total
Significant Unobservable Inputs Level 3 [Member] | U.S. Agencies [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total
Significant Unobservable Inputs Level 3 [Member] | Auction rate notes [Member]
Schedule of financial assets measured at fair value on a recurring basis
Total	$ 6,780	$ 6,857

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Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Condensed Consolidated Statements of Comprehensive Income [Abstract]
NET INCOME	$ 6,031	$ 10,721	$ 11,447	$ 19,786
Other comprehensive income:
Income tax expense related to unrealized gains on investments	42	231	65	255
Other comprehensive income, net of tax	67	359	104	396
COMPREHENSIVE INCOME	6,098	11,080	11,551	20,182
Less: comprehensive income attributable to the noncontrolling interest	(4)		(4)
COMPREHENSIVE INCOME ATTRIBUTABLE TO MICREL, INCORPORATED SHAREHOLDERS	$ 6,094	$ 11,080	$ 11,547	$ 20,182

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Share Repurchase Program (Details) (USD $)	1 Months Ended		6 Months Ended		12 Months Ended		5 Months Ended	6 Months Ended
	Jul. 31, 2012	Feb. 28, 2010	Jun. 30, 2012	Sep. 30, 2010	Dec. 31, 2010	Jul. 26, 2012	Jul. 26, 2012 Maximum [Member]	Jun. 30, 2012 Maximum [Member]	May 30, 2011 Minimum [Member]	Sep. 30, 2010 Minimum [Member]
Share Repurchase Program (Textual) [Abstract]
Share repurchase program	$ 30,000,000	$ 15,000,000		$ 30,000,000	$ 30,000,000		$ 30,000,000	$ 9,000,000	$ 30,000,000	$ 15,000,000
Share Repurchase Program (Additional Textual) [Abstract]
Common stock for an aggregate price			14,700,000
Total value of repurchase common stock						$ 39,000,000
Total repurchase shares			1,437,445

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Segment Reporting (Tables)

6 Months Ended

Jun. 30, 2012

Segment Reporting [Abstract]

Net Revenues by Segment

Net Revenues by Segment	Three Months Ended June 30,						Six Months Ended June 30,
(dollars in thousands)	2012			2011			2012			2011
Net Revenues:
Standard Products	$	61,204		$	65,808		$	120,003		$	131,379
Other Products		2,495			2,702			4,847			4,625
Total net revenues	$	63,699		$	68,510		$	124,850		$	136,004
As a Percentage of Total Net Revenues:
Standard Products		96	%		96	%		96	%		97	%
Other Products		4			4			4			3
Total net revenues		100	%		100	%		100	%		100	%

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Share Repurchase Program

6 Months Ended

Jun. 30, 2012

Share Repurchase Program [Abstract]

SHARE REPURCHASE PROGRAM

15. SHARE REPURCHASE PROGRAM

In February 2010, the Company’s Board of Directors approved a $15.0 million share repurchase program for calendar year 2010. In September 2010, the Company’s Board of Directors approved an increase to the amount authorized for repurchase from $15.0 million to $30.0 million. In November 2010, the Company’s Board of Directors approved an extension of the termination of the authorized repurchase plan from December 31, 2010 to the date on which the total authorized aggregate amount is expended. In May 2011, the Company’s Board of Directors authorized the repurchase of an additional $30.0 million of the Company’s common stock. The shares authorized for purchase under the new plan are in addition to the shares that may yet be purchased under the 2010 plan, which increased the total available for repurchase, as of June 30, 2012, to $9.0 million. On July 26, 2012, the Company announced that its Board of Directors has authorized the repurchase of an additional $30.0 million of the Company’s common stock. This new authorization increased the total available for repurchase to $39.0 million.

Shares of common stock purchased pursuant to the repurchase program are cancelled from outstanding shares upon repurchase and credited to an authorized and un-issued reserve account. Repurchased amounts are recorded as a reduction to common stock to the extent available. Any amounts repurchased which are in excess of the existing total common stock balance are recorded as a reduction of retained earnings. Share repurchases are recorded as a reduction to common stock to the extent available. Any amounts repurchased which are in excess of the existing total common stock balance are recorded as a reduction of retained earnings. Share repurchases are intended to reduce the number of outstanding shares of common stock to increase shareholder value and offset dilution from the Company’s stock option plans and ESPP. During the six months ended June 30, 2012, the Company repurchased 1,437,445 shares of its common stock for an aggregate price of $14.7 million.

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Significant Accounting Policies (Details) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Reconciliation of weighted-average shares used in computing net income per share
Weighted average common shares outstanding	60,217	62,167	60,533	62,007
Dilutive effect of stock options outstanding using the treasury stock method	620	860	686	1,050
Shares used in computing diluted net income per share	60,837	63,027	61,219	63,057

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Dividends

6 Months Ended

Jun. 30, 2012

Dividends [Abstract]

DIVIDENDS

17. DIVIDENDS

On April 26, 2012, the Company’s Board of Directors declared a cash dividend of $0.04 per share outstanding share of common stock. The aggregate payment of $2.5 million was made on May 23, 2012 to shareholders of record as of May 9, 2012.

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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 11,447	$ 19,786
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	6,050	6,295
Share-based compensation expense	3,691	2,685
Excess tax benefits from stock-based awards	(40)	(463)
Loss on disposal of assets	1
Deferred income tax provision	(1,737)	2,067
Changes in operating assets and liabilities
Accounts receivable	(4,563)	(2,911)
Inventories	(95)	(1,548)
Income taxes receivable	6,912	5,057
Prepaid expenses and other assets	(8)	479
Accounts payable	(1,125)	(4,460)
Income taxes payable	553	759
Other current liabilities	(933)	673
Deferred income on shipments to distributors	95	(913)
Net cash provided by operating activities	20,248	27,506
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of PhaseLink's net assets, net of cash acquired	(16,439)
Purchases of property, plant and equipment	(4,085)	(4,818)
Purchases of investments	(30,596)	(23,939)
Proceeds from sale and maturities of investments	24,818	27,045
Net cash provided by investing activities	(26,302)	(1,712)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of debt	(282)	(2,857)
Proceeds from the issuance of common stock	1,473	10,858
Repurchases of common stock	(14,694)	(7,228)
Payment of cash dividends	(4,905)	(4,350)
Purchase of stock for withholding taxes on vested restricted stock	(115)	0
Excess tax benefits from stock-based awards	40	463
Net cash used in financing activities	(18,483)	(3,114)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(24,537)	22,680
CASH AND CASH EQUIVALENTS - Beginning of period	60,610	74,738
CASH AND CASH EQUIVALENTS - End of period	$ 36,073	$ 97,418

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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]
Allowances for accounts receivable	$ 1,444	$ 1,294
Preferred stock, par value
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	59,808,482	61,038,507
Common stock, shares outstanding	59,808,482	61,038,507

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Borrowing Arrangements

6 Months Ended

Jun. 30, 2012

Borrowing Arrangements [Abstract]

BORROWING ARRANGEMENTS

10. BORROWING ARRANGEMENTS

Under the terms of an unsecured credit facility with Bank of the West, the Company has a $5.0 million line of credit available for general working capital needs, which includes a $5.0 million letter of credit sub-facility including a $2.0 million foreign exchange sub-facility. On April 22, 2011, the expiration date of the line of credit was extended from April 30, 2011 to April 30, 2013. Interest rates under the amended agreement are based on one of three interest rates, at the Company’s option: (1) a variable alternate base rate plus 1.0%, the alternate base rate being the greater of (x) Bank of the West’s prime rate, (y) the Fed Funds Rate plus 0.5% or (z) daily adjusted one-month LIBOR plus 1.0%; (2) floating one-month LIBOR plus 2.0% or (3) fixed LIBOR for one, two, three or six month periods, plus 2.0%. As of June 30, 2012, the Company had no borrowings under the line of credit. The agreement includes certain restrictive covenants and, as of June 30, 2012, the Company was in compliance with such covenants.

The credit facility also included a $15.0 million term loan facility to finance the repurchase of shares of the Company’s common stock. In May 2009, the Company borrowed $15.0 million under the term loan. Interest under the term loan facility was payable at a rate equal to floating one-month LIBOR plus 2.25%. Borrowings were payable over 21 equal monthly installments, which commenced on August 31, 2009. The final payment was made on April 30, 2011.

Through the PhaseLink acquisition, the Company acquired two term loans totaling $282,000 with a local bank in Taiwan. The Company paid off the acquired bank loans in full in June 2012.

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Document and Entity Information	6 Months Ended
	Jun. 30, 2012	Aug. 01, 2012
Document and Entity Information [Abstract]
Entity Registrant Name	MICREL INC
Entity Central Index Key	0000932111
Document Type	10-Q
Document Period End Date	Jun. 30, 2012
Amendment Flag	false
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		59,478,974

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Derivative Financial Instruments

6 Months Ended

Jun. 30, 2012

Derivative Financial Instruments [Abstract]

DERIVATIVE FINANCIAL INSTRUMENTS

11. DERIVATIVE FINANCIAL INSTRUMENTS

The Company entered into an interest rate swap contract (the “Swap”) back in 2009 to partially offset its exposure to the effects of changes in interest rates on its variable-rate financing obligations. The Swap was considered a cash flow hedge. The Company does not hold derivative financial instruments for trading or speculative purposes. The Swap matured in April 2011 and was not renewed. As of June 30, 2012, there was no Swap outstanding.

For derivative instruments that are designated and qualify as a cash flow hedge, the effective portion of the gain or loss on the derivative is reported as a component of other comprehensive income and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. Gains and losses on the derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings.

All derivatives are recorded at fair value in either prepaid and other current assets or other accrued liabilities. The Company reports cash flows from derivative instruments in cash flows from operating activities. As of June 30, 2012, there was no notional amount of the outstanding Swap. The effect of derivative instruments on the Statement of Operations for the three and six months ended June 30, 2012 and 2011 was not material.

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Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Condensed Consolidated Statements of Operations [Abstract]
NET REVENUES	$ 63,699		$ 68,510		$ 124,850		$ 136,004
COST OF REVENUES	28,565	[1]	28,585	[1]	56,540	[1]	58,230	[1]
GROSS PROFIT	35,134		39,925		68,310		77,774
OPERATING EXPENSES:
Research and development	13,920	[1]	12,231	[1]	27,244	[1]	24,752	[1]
Selling, general and administrative	12,179	[1]	11,672	[1]	23,339	[1]	23,763	[1]
Total operating expenses	26,099		23,903		50,583		48,515
INCOME FROM OPERATIONS	9,035		16,022		17,727		29,259
OTHER INCOME (EXPENSE):
Interest income	187		177		388		367
Interest expense	(42)		(2)		(47)		(18)
Other income (expense), net	(123)		36		(123)		75
Total other income, net	22		211		218		424
INCOME BEFORE INCOME TAXES AND NONCONTROLLING INTEREST	9,057		16,233		17,945		29,683
PROVISION FOR INCOME TAXES	3,026		5,512		6,498		9,897
NET INCOME	6,031		10,721		11,447		19,786
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTEREST	(4)				(4)
NET INCOME ATTRIBUTABLE TO MICREL, INCORPORATED SHAREHOLDERS	$ 6,027		$ 10,721		$ 11,443		$ 19,786
NET INCOME PER SHARE ATTRIBUTABLE TO MICREL, INCORPORATED SHAREHOLDERS:
Basic	$ 0.10		$ 0.17		$ 0.19		$ 0.32
Diluted	$ 0.10		$ 0.17		$ 0.19		$ 0.31
CASH DIVIDENDS DECLARED PER SHARE	$ 0.040		$ 0.035		$ 0.080		$ 0.070
WEIGHTED AVERAGE SHARES USED IN COMPUTING PER SHARE AMOUNTS:
Basic	60,217		62,167		60,533		62,007
Diluted	60,837		63,027		61,219		63,057

[1] Share-based compensation expense included in: Cost of revenues $ 282 $ 284 $ 566 $ 526, Research and development 812, 525, 1557, 1051, Selling, general and administrative 815, 503,1 568, 1108

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Investments

6 Months Ended

Jun. 30, 2012

Investments [Abstract]

INVESTMENTS

5. INVESTMENTS

Investments purchased with remaining maturity dates of greater than three months and less than 12 months are classified as short-term. Investments purchased with remaining maturity dates of 12 months or greater are classified either as short-term or as long-term based on maturities and the Company’s intent with regard to those securities (expectations of sales and redemptions). Short-term investments as of June 30, 2012 primarily consisted of corporate debt instruments, certificate of deposits and liquid municipals and were classified as available-for-sale securities. Long-term investments as of June 30, 2012 consisted of auction rate notes secured by student loans and were classified as available-for-sale securities. Available-for sale securities are stated at market value with unrealized gains and losses included in accumulated other comprehensive income. Unrealized losses are charged against income when a decline in the fair market value of an individual security is determined to be other than temporary. Realized gains and losses on investments are included in other income or expense. A summary of the Company’s short-term investments at June 30, 2012 and December 31, 2011 is as follows (in thousands):

	As of June 30, 2012									As of December 31, 2011
	Cost		Gross Gains		Gross Losses			Fair Value		Cost		Gross Gains		Gross Losses			Fair Value
Municipal Securities	$	13,123		—	$	(76	)	$	13,047	$	11,413		—	$	(115	)	$	11,298
Corporate Debt Securities		33,418		—		(206	)		33,212		33,723		—		(327	)		33,396
Commercial Paper		9,468		—		(7	)		9,461		4,991		—		(2	)		4,989
U.S. Agencies		4,523		—		(21	)		4,502		4,528		—		(17	)		4,511
Certificates of Deposits		23,135		—		—			23,135		23,071		—		—			23,071
Total	$	83,667	$	—	$	(310	)	$	83,357	$	77,726	$	—	$	(461	)	$	77,265

As of June 30, 2012, $52.9 million of the Company’s short-term investments were in an unrealized loss position. The Company recorded a $0.2 million net of tax ($0.3 million pre-tax) for temporary impairment of these securities to accumulated other comprehensive income, a component of shareholders’ equity.

To determine the fair value of financial instruments, the Company uses a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (level 1 measurements) and the lowest priority to unobservable inputs (level 3 measurements). The three levels of the fair value hierarchy are described below:

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

• Level 2 - Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

• Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Most of the Company’s financial instruments are classified within Level 1 or Level 2 of the fair value hierarchy because they are valued using quoted market prices, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency.

The types of instruments valued based on quoted market prices in active markets include money market funds and commercial paper. Such instruments are classified within Level 1 of the fair value hierarchy. The types of instruments valued based on other observable inputs include U.S. agency securities. Such instruments are classified within Level 2 of the fair value hierarchy. The types of instruments valued based on unobservable inputs include the auction rate securities held by the Company. Such instruments are generally classified within Level 3 of the fair value hierarchy. The Company estimated the fair value of these auction rate securities using a discounted cash flow model incorporating assumptions that market participants would use in their estimates of fair value. Some of these assumptions include estimates for interest rates, timing and amount of cash flows and expected holding periods of the auction rate securities.

Financial assets measured at fair value on a recurring basis as of June 30, 2012 were as follows (in thousands):

	Quoted Prices in Active Markets for Identical Assets Level 1		Significant Other Observable Inputs Level 2		Significant Unobservable Inputs Level 3		Total
Money Market Funds	$	24,441		—		—	$	24,441
Certificates of Deposits		23,135		—		—		23,135
Corporate Debt Securities		—		33,212		—		33,212
Commercial Paper		—		9,461		—		9,461
Municipal Securities		—		13,047		—		13,047
U.S. Agencies		—		4,502		—		4,502
Auction rate notes		—		—		6,780		6,780
Total	$	47,576	$	60,222	$	6,780	$	114,578

Financial assets measured at fair value on a recurring basis as of December 31, 2011 were as follows (in thousands):

	Quoted Prices in Active Markets for Identical Assets Level 1		Significant Other Observable Inputs Level 2		Significant Unobservable Inputs Level 3		Total
Money Market Funds	$	55,912		—		—	$	55,912
Certificates of Deposits		23,071		—		—		23,071
Corporate Debt Securities		—		33,396		—		33,396
Commercial Paper		—		4,990		—		4,990
Municipal Securities		—		11,297		—		11,297
U.S. Agencies		—		4,511		—		4,511
Auction rate notes		—		—		6,857		6,857
Total	$	78,983	$	54,194	$	6,857	$	140,034

As of June 30, 2012, the Company had $7.7 million of auction rate notes, the fair value of which has been measured using Level 3 inputs. Auction rate notes are securities that are structured with short-term interest rate reset dates of generally less than ninety days, but with contractual maturities that can be in excess of ten years. At the end of each reset period, which occurs every seven or twenty eight days for the securities held by the Company, investors can sell or continue to hold the securities at par. As a result of sell orders exceeding buy orders, auctions for the student loan-backed notes held by the Company have failed as of June 30, 2012. To date the Company has collected all interest payable on all of its auction-rate securities when due and expects to continue to do so in the future. The principal associated with failed auctions will not be accessible until a successful auction occurs, a buyer is found outside of the auction process, the issuers redeem the securities, the issuers repay principal over time from cash flows prior to final maturity or final payments come due according to contractual maturities ranging from 20 to 35 years. As a result, the Company has classified all auction rate notes as long-term investments as of June 30, 2012 and December 31, 2011. In the event of a failed auction, the notes bear interest at a predetermined maximum rate based on the credit rating of notes as determined by one or more nationally recognized statistical rating organizations. For the auction rate notes held by the Company as of June 30, 2012 and December 31, 2011, the maximum interest rate is generally one month LIBOR plus 1.5% based on the notes’ rating as of that date.

The Company has used a combination of discounted cash flow models and observable transactions for similar securities to determine the estimated fair value of its investment in auction rate notes as of June 30, 2012 and December 31, 2011. The assumptions used in preparing the discounted cash flow model include estimates for interest rates, estimates for discount rates using yields of comparable traded instruments adjusted for illiquidity and other risk factors, amount of cash flows and expected holding periods of the auction rate notes. Based on this assessment of fair value, as of June 30, 2012, the Company determined there was a cumulative decline in the fair value of its auction rate notes and recorded a $0.6 million net of tax ($0.9 million pre-tax) temporary impairment of these securities to accumulated other comprehensive income, a component of shareholders’ equity.

For the six months ended June 30, 2012, the changes in the Company’s Level 3 securities (consisting of auction rate notes) were as follows (in thousands):

	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
Beginning balance, December 31, 2011	$	6,857
Transfers in and/or out of Level 3		—
Total gains, before tax		23
Settlements		(100	)
Ending balance, June 30, 2012	$	6,780

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Share-Based Compensation

6 Months Ended

Jun. 30, 2012

Share-Based Compensation [Abstract]

SHARE-BASED COMPENSATION

4. SHARE-BASED COMPENSATION

Share-based compensation is measured at the grant date, based on the fair value of the award and is recognized over the employee’s requisite service period. For further details regarding the Company’s share-based compensation arrangements, refer to Note 7 of Notes to Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011. The following table summarizes total share-based compensation expense included in the Condensed Consolidated Statement of Operations (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Cost of revenues	$	282		$	284		$	566		$	526
Research and development		812			525			1,557			1,051
Selling, general and administrative		815			503			1,568			1,108
Pre-tax share-based compensation expense		1,909			1,312			3,691			2,685
Less income tax effect		(679	)		(449	)		(1,305	)		(992	)
Net share-based compensation expense	$	1,230		$	863		$	2,386		$	1,693

During the three months ended June 30, 2012 and 2011, the Company granted 645,400 and 749,471 stock options, respectively, at weighted average fair values of $2.92 and $4.65 per share, respectively. For the six months ended June 30, 2012 and 2011, the Company granted 783,820 and 1,802,371 stock options, respectively, at weighted average fair values of $2.95 and $5.37 per share, respectively. The fair value of the Company’s stock options granted under the Company’s option plans was estimated at the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions:

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Expected term (years)		5.8			5.6			5.8			5.7
Stock volatility		35.9	%		39.8	%		36.2	%		40.1	%
Risk free interest rates		0.9	%		2.0	%		1.1	%		2.2	%
Dividends during expected terms		1.7	%		1.3	%		1.6	%		1.2	%

As of June 30, 2012, there was $17.0 million of total unrecognized share-based compensation related to non-vested stock option awards which is expected to be recognized over a weighted-average period of 4.4 years. Total share-based compensation capitalized as part of inventory as of June 30, 2012 and December 31, 2011 was $177,000 and $174,000, respectively.

The Company also grants Restricted Stock Units (“RSU”s) to its employees. In the three months ended June 30, 2012 and 2011, the Company granted 211,086 and 67,153 RSUs, respectively, at weighted average fair values of $9.73 and $10.91, respectively. During the six months ended June 30, 2012 and 2011, the Company granted 256,086 and 162,153 RSUs, respectively, at weighted average fair values of $9.76 and $11.85, respectively.

Under the Company’s Employee Stock Purchase Plan (“ESPP”), eligible employees are permitted to have salary withholdings to purchase shares of Common Stock at a price equal to 95% of the market value of the stock at the end of each three-month offer period, subject to an annual limitation. The ESPP is considered non-compensatory per current share-based compensation accounting guidelines.

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Income Taxes

6 Months Ended

Jun. 30, 2012

Income Taxes [Abstract]

Income Taxes

16. INCOME TAXES

The income tax provision for the three and six months ended June 30, 2012, as a percentage of income before taxes, was 33.4% and 36.2%, respectively. The tax provision for the six months ended June 30, 2012 included an out-of-period charge of $491,000 related to the write-offs of deferred tax assets associated with the net operating losses of two previously acquired companies. This charge is immaterial for the three and six months ended June 30, 2012 and immaterial to any applicable prior periods that could have been affected. For the three months ended June 30, 2012, the Company also recognized $176,000 of previously unrecognized tax benefits due to settlements with the tax authorities. Additionally, the tax provision for this period excluded any benefits from the federal research and development credit which expired on December 31, 2011 and has not been reinstated as of June 30, 2012. The income tax provision for the three and six months ended June 30, 2011, as a percentage of income before taxes, was 34.0% and 33.3%, respectively.

As of June 30, 2012, the gross liability for uncertain tax positions was $11.9 million (including interest and penalties) and the net liability, reduced for the federal effects of potential state tax exposures, was $8.6 million. If these uncertain tax positions are sustained upon tax authority audit, or otherwise become certain, the net $8.6 million would favorably affect the Company’s tax provision in such future periods. Included in the $8.6 million is $2.1 million which has not yet reduced income tax payments, and therefore, has been netted against non-current deferred tax assets. The remaining $6.5 million liability was included in long-term income taxes payable. The Company does not anticipate a significant change to the $6.5 million long-term uncertain income tax positions within the next 12 months.

The Company continues to recognize interest and penalties related to income tax matters as part of the income tax provision. As of June 30, 2012 and December 31, 2011, the Company had $656,000 and $655,000, respectively, accrued for interest and none accrued for penalties in both periods. These accruals are included as a component of long-term income taxes payable.

The Company is required to file U.S. federal income tax returns as well as income tax returns in various states and foreign jurisdictions. The Company may be subject to examination by the Internal Revenue Service (“IRS”) for calendar years 2008 and forward. Significant state tax jurisdictions include California, Massachusetts and Texas, and generally, the Company is subject to routine examination for years 2005 and forward in these jurisdictions. In addition, any research and development credit carryforwards that were generated in prior years and utilized in these years may also be subject to examination by respective state taxing authorities. Generally, the Company is subject to routine examination for years 2004 and forward in various immaterial foreign tax jurisdictions in which it operates.

Deferred tax assets and liabilities result primarily from temporary differences between book and tax bases of assets and liabilities and state research and development credit carryforwards. The Company had net current deferred tax assets of $23.1 million and net long-term deferred tax assets of $9.1 million as of June 30, 2012. The Company must regularly assess the likelihood that future taxable income levels will be sufficient to ultimately realize the tax benefits of these deferred tax assets. The Company currently believes that future taxable income levels will be sufficient to realize the tax benefits of these deferred tax assets and has not established a valuation allowance except for net operating losses generated in China. Should the Company determine that future realization of these tax benefits is not likely, additional valuation allowance would be established which would increase the Company’s tax provision in the period of such determination.

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Significant Customers

6 Months Ended

Jun. 30, 2012

Significant Customers [Abstract]

SIGNIFICANT CUSTOMERS

12. SIGNIFICANT CUSTOMERS

During the six months ended June 30, 2012, two worldwide distributors and one OEM accounted for $31.5 million (25%), $20.8 million (17%) and $13.3 million (11%) of net revenues, respectively. During the six months ended June 30, 2011, two worldwide distributors, accounted for $28.7 million (21%) and $24.0 million (18%) of net revenues, respectively.

At June 30, 2012, two worldwide distributors accounted for 30%, and 13%, respectively, of total accounts receivable. At December 31, 2011, two world-wide distributors and an Asian based distributor accounted for 23%, 10% and 11%, respectively, of total accounts receivable.

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Goodwill and Intangible Assets

6 Months Ended

Jun. 30, 2012

Goodwill and Intangible Assets [Abstract]

GOODWILL AND INTANGIBLE ASSETS

8. GOODWILL AND INTANGIBLE ASSESTS

Goodwill represents the excess of the purchase price paid over the fair value of tangible and identifiable intangible net assets acquired in a business combination. On April 2, 2012, the Company acquired PhaseLink and recorded approximately $6.1 million of goodwill as the purchase price exceeded the fair value allocated to net tangible assets and identifiable intangible assets. The goodwill will be reviewed annually on October 1^stor whenever events or circumstances occur which indicate that goodwill might be impaired.

The Company’s annual goodwill impairment assessment will include first performing a qualitative assessment. As part of this assessment, the Company will consider the trading value of the Company’s stock and the implied value of the Company as compared to the Company’s net assets as well as the valuation of PhaseLink and will determine whether it is not more likely than not that the fair value is less than the carrying values of the Company’s reporting unit before proceeding to the Step 1 of the goodwill impairment test. If, after assessing the qualitative factors, a company determines that it is not more likely than not that the fair value of a reporting unit is less than its carrying value, then performing the two-step impairment test is unnecessary. However, if a company concludes otherwise, then it is required to perform the first step of the two-step goodwill impairment test. The first step requires a comparison of the fair value of the Company’s reporting unit to its net book value. If the fair value is greater, then no impairment is deemed to have occurred. If the fair value is less, then the second step must be performed to determine the amount, if any, of actual impairment.

The process of evaluating the potential impairment of long-lived assets is highly subjective and requires significant judgment. In estimating the fair value of these assets, the Company makes estimates and judgments about future revenues and cash flows. The Company’s forecasts will be based on assumptions that are consistent with the plans and estimates the Company is using to manage the business. Changes in these estimates could change the Company’s conclusion regarding impairment of the long-lived assets and potentially result in future impairment charges for all or a portion of the followings balances at June 30, 2012 (in thousands).

	Carrying Amount as of March 31, 2012		Additions at Cost April 2, 2012		Carrying Amount as of June 30, 2012		Accumulated Amortization as of June 30, 2012			Net Carrying Amount as of June 30, 2012
Developed technology	$	—	$	4,400	$	4,400	$	(110	)	$	4,290
Customer relationships		—		3,000		3,000		(75	)		2,925
Trademarks		—		510		510		(38	)		472
Non-competition agreements		—		410		410		(52	)		358
In-process research and development		—		410		410		—			410
	$	—	$	8,730	$	8,730	$	(275	)	$	8,455

The above intangible assets continue to be amortized over their estimated useful lives of 2 to 10 years using the straight-line method. Total intangible amortization expense for the three-month periods ended June 30, 2012 was $275,000.

The estimated future amortization expense of intangible assets as of June 30, 2012 was as follows (in thousands):

Year Ending December 31,
2012 (remaining six months)	$	549
2013		1,098
2014		881
2015		808
2016		808
Thereafter		4,311
	$	8,455

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Income Taxes (Details) (USD $)	3 Months Ended			6 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Income Taxes (Textual) [Abstract]
Percentage of income before taxes		33.40%	34.00%	36.20%	33.30%
Tax provision includes an out-of-period charge, related to write-offs of deferred tax assets		$ 491,000
Net operating losses, previously acquired companies		2
Liability for uncertain tax positions	11,900,000			11,900,000
Net liability, reduced for the federal effects of potential state tax exposures	8,600,000			8,600,000
Tax provision, included not yet reduced income tax payments	2,100,000			2,100,000
Liability is included in long-term income taxes payable	6,471,000			6,471,000		6,450,000
Long-term uncertain income tax positions within the next 12 months	6,500,000			6,500,000
Interest and penalties related to income tax	655,000	656,000		655,000
Net current deferred tax assets	23,161,000			23,161,000		22,854,000
Net long-term deferred tax assets	9,100,000			9,100,000
Unrecognized tax benefits due to settlements with the tax authorities	$ 3,026,000		$ 5,512,000	$ 6,498,000	$ 9,897,000

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Inventories

6 Months Ended

Jun. 30, 2012

Inventories [Abstract]

INVENTORIES

6. INVENTORIES

Inventories consisted of the following (in thousands):

	June  30, 2012		December  31, 2011
Finished goods	$	8,522	$	11,824
Work in process		27,855		22,863
Raw materials		1,327		1,599
Total inventories	$	37,704	$	36,286

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Property, Plant and Equipment

6 Months Ended

Jun. 30, 2012

Property, Plant and Equipment [Abstract]

PROPERTY, PLANT AND EQUIPMENT

7. PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consisted of the following (in thousands):

	June 30, 2012			December 31, 2011
Manufacturing equipment	$	174,041		$	170,304
Land		8,101			8,101
Buildings and improvements		53,790			53,539
Office furniture and research equipment		19,663			17,834
		255,595			249,778
Accumulated depreciation		(194,668	)		(188,894	)
Total property, plant and equipment, net	$	60,927		$	60,884

Depreciation expense for the three and six months ended June 30, 2012 was $3.1 million and $5.8 million, respectively.

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Other Current Liabilities

6 Months Ended

Jun. 30, 2012

Other Current Liabilities [Abstract]

OTHER CURRENT LIABILITIES

9. OTHER CURRENT LIABILITIES

Other current liabilities consisted of the following (in thousands):

	June 30, 2012		December 31, 2011
Accrued compensation	$	4,195	$	4,997
Accrued commissions		2,321		1,964
Accrued workers compensation and health insurance		981		987
All other current accrued liabilities		1,768		1,381
Total other current liabilities	$	9,265	$	9,329

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Other Current Liabilities (Tables)

6 Months Ended

Jun. 30, 2012

Other Current Liabilities [Abstract]

Schedule of other current liabilities

	June 30, 2012		December 31, 2011
Accrued compensation	$	4,195	$	4,997
Accrued commissions		2,321		1,964
Accrued workers compensation and health insurance		981		987
All other current accrued liabilities		1,768		1,381
Total other current liabilities	$	9,265	$	9,329

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Goodwill and Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Apr. 02, 2012	Mar. 31, 2012
Schedule of goodwill and intangible assets
Gross Carrying Amount	$ 8,730
Additions at cost		8,730
Accumulated Amortization	(275)
Total	8,455
Developed technology [Member]
Schedule of goodwill and intangible assets
Gross Carrying Amount	4,400
Additions at cost		4,400
Accumulated Amortization	(110)
Total	4,290
Customer relationships [Member]
Schedule of goodwill and intangible assets
Gross Carrying Amount	3,000
Additions at cost		3,000
Accumulated Amortization	(75)
Total	2,925
Trademarks [Member]
Schedule of goodwill and intangible assets
Gross Carrying Amount	510
Additions at cost		510
Accumulated Amortization	(38)
Total	472
Non-competition agreement [Member]
Schedule of goodwill and intangible assets
Gross Carrying Amount	410
Additions at cost		410
Accumulated Amortization	(52)
Total	358
In-process research and development [Member]
Schedule of goodwill and intangible assets
Gross Carrying Amount	410
Additions at cost		410
Accumulated Amortization
Total	$ 410

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Litigation and Commitments and Contingencies

6 Months Ended

Jun. 30, 2012

Litigation and Commitments and Contingencies [Abstract]

LITIGATION AND COMMITMENTS AND CONTINGENCIES

14. LITIGATION AND COMMITMENTS AND CONTINGENCIES

On November 1, 2008, Nadatel Co., Ltd. (“Nadatel”), a video surveillance equipment supplier based in Seoul Korea, filed a complaint against the Company for product liability and tort-based damages with the Seoul Central District Court in Seoul, Korea. In 2006 and 2007, Nadatel purchased approximately 17,000 of the Company’s low-dropout voltage regulators for use in its closed circuit television digital video recorder application for security systems. Nadatel claimed that the parts failed in the field, resulting in malfunction of its application, recall of the application and replacement of circuit boards incorporating the Company’s part. The Company settled this claim in June 2012 pursuant to a court-mediated agreement without admitting to liability or product defects. Despite the Company’s assessment that the claims asserted by Nadatel are untrue, it settled this protracted litigation in order to avoid further legal expense and distraction. The settlement amount of approximately $200,000 was recorded as a component of selling, general and administrative expenses for the three and six months ended June 30, 2012.

Additional claims have been filed by or have arisen against the Company in its normal course of business. Generally, litigation is subject to inherent uncertainties, and no assurance can be given that the Company will prevail in any particular lawsuit. Accordingly, pending lawsuits, as well as potential future litigation with other companies, could result in substantial costs and diversion of resources and could have a material adverse effect on the Company’s financial condition, results of operations or cash flows. However, the Company believes that the ultimate resolution of outstanding claims and lawsuits will not have a material adverse effect on the Company’s financial condition, results of operations or cash flows.

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Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2012

Significant Accounting Policies [Abstract]

Interim Financial Information

Interim Financial Information - The accompanying condensed consolidated financial statements of Micrel, Incorporated and its wholly-owned and majority-owned subsidiaries (together “Micrel” or the “Company”) as of June 30, 2012 and for the three and six months ended June 30, 2012 and 2011 are unaudited. In the opinion of management, the condensed consolidated financial statements include all adjustments (consisting only of normal recurring accruals) that management considers necessary for a fair statement of its financial position, operating results, comprehensive income and cash flows for the interim periods presented. Operating results and cash flows for interim periods are not necessarily indicative of results for the entire year. The Condensed Consolidated Balance Sheet as of December 31, 2011, was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted (“GAAP”) in the United States of America. These financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011. These financial statements should also be read in conjunction with the Company’s critical accounting policies included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011 and those included in this Form 10-Q below.

Reclassifications

Effective January 1, 2012, the Company adopted the new standard that requires the presentation of comprehensive income, the components of net income and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. The new standard also requires presentation of adjustments for items that are reclassified from other comprehensive income to net income in the statement where the components of net income and the components of other comprehensive income are presented. In December 2011, an amendment was issued that defers the requirement to present reclassification adjustments out of accumulated other comprehensive income on the face of the consolidated statement of income. The adoption concerns presentation and disclosure only and did not have an impact on the Company’s consolidated financial position or results of operations.

Net Income Per Common and Equivalent Share

Net Income Per Common and Equivalent Share - Basic net income per share is computed by dividing net income attributable to Micrel, Incorporated shareholders by the number of weighted-average common shares outstanding. Diluted net income per share reflects potential dilution from outstanding stock options using the treasury stock method. Reconciliation of weighted-average shares used in computing net income per share attributable to Micrel, Incorporated shareholders is as follows (in thousands):

	Three Months Ended June  30,				Six Months Ended June 30,
	2012		2011		2012		2011
Weighted average common shares outstanding		60,217		62,167		60,533		62,007
Dilutive effect of stock options outstanding using the treasury stock method		620		860		686		1,050
Shares used in computing diluted net income per share attributable to Micrel, Incorporated shareholders		60,837		63,027		61,219		63,057

For the three and six months ended June 30, 2012, 5.5 million stock options and 5.3 million stock options, respectively, have been excluded from the weighted-average number of common shares outstanding for the diluted net income per share computations as they were anti-dilutive. For the three and six months ended June 30, 2011, 3.6 million stock options and 2.9 million stock options, respectively, have been excluded from the weighted-average number of common shares outstanding for the diluted net income per share computations as they were anti-dilutive.

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Property, Plant and Equipment (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Property, plant and equipment
Property, plant and equipment, Gross	$ 255,595	$ 249,778
Accumulated depreciation	(194,668)	(188,894)
Total property, plant and equipment, net	60,927	60,884
Manufacturing equipment [Member]
Property, plant and equipment
Property, plant and equipment, Gross	174,041	170,304
Land [Member]
Property, plant and equipment
Property, plant and equipment, Gross	8,101	8,101
Buildings and improvements [Member]
Property, plant and equipment
Property, plant and equipment, Gross	53,790	53,539
Office furniture and research equipment [Member]
Property, plant and equipment
Property, plant and equipment, Gross	$ 19,663	$ 17,834

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Share-Based Compensation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Share-based compensation expense
Pre-tax share-based compensation expense	$ 1,909	$ 1,312	$ 3,691	$ 2,685
Less income tax effect	(679)	(449)	(1,305)	(992)
Net share-based compensation expense	1,230	863	2,386	1,693
Cost of revenues [Member]
Share-based compensation expense
Pre-tax share-based compensation expense	282	284	566	526
Research and development [Member]
Share-based compensation expense
Pre-tax share-based compensation expense	812	525	1,557	1,051
Selling, general and administrative [Member]
Share-based compensation expense
Pre-tax share-based compensation expense	$ 815	$ 503	$ 1,568	$ 1,108

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Condensed Consolidated Statements of Operations (Parenthetical) (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Share-based compensation expense included in:
Cost of revenues	$ 28,565	[1]	$ 28,585	[1]	$ 56,540	[1]	$ 58,230	[1]
Research and development	13,920	[1]	12,231	[1]	27,244	[1]	24,752	[1]
Selling, general and administrative	12,179	[1]	11,672	[1]	23,339	[1]	23,763	[1]
Share-Based Compensation Expense
Share-based compensation expense included in:
Cost of revenues	282		284		566		526
Research and development	812		525		1,557		1,051
Selling, general and administrative	$ 815		$ 503		$ 1,568		$ 1,108

[1] Share-based compensation expense included in: Cost of revenues $ 282 $ 284 $ 566 $ 526, Research and development 812, 525, 1557, 1051, Selling, general and administrative 815, 503,1 568, 1108

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Acquisition

6 Months Ended

Jun. 30, 2012

Acquisition [Abstract]

ACQUISITION

3. ACQUISITION

On March 15, 2012, the Company signed a definite agreement to acquire a controlling interest in PhaseLink^TM Company Limited (“PhaseLink”), a private company based in Taiwan and in San Jose, California. The acquisition was completed on April 2, 2012. The Company acquired approximately 95% of the outstanding shares of PhaseLink for $19.7 million in cash ($16.4 million net of cash acquired). The objective of the acquisition is to complement Micrel’s high performance clock generation, distribution products for the communication market and to expand its product offerings into the consumer and industrial markets. In addition, the Company expects the acquisition to enhance its technology portfolio and further expand its research and development capabilities. The Company has included the financial results of PhaseLink in its condensed consolidated financial statements beginning on the acquisition date. Pro forma financial disclosures are not presented herein as the financial results of this acquisition are considered immaterial.

Recognized amounts of identifiable assets acquired and liabilities assumed

The Company accounted for the transaction using the acquisition method and, accordingly, the consideration has been allocated to the tangible and intangible assets acquired and liabilities assumed on the basis of their respective estimated fair values on the acquisition date. For the three months ended June 30, 2012, acquisition costs of $82,000 were expensed as incurred. The Company’s allocation of the total purchase price is summarized below (in thousands):

Cash and cash equivalents	$	3,255
Accounts receivable		1,119
Inventories		1,320
Other assets		273
Property, plant and equipment		1,734
Developed technology		4,400
Customer relationships		3,000
Trademarks		510
Non-competition agreements		410
In-process research and development		410
Goodwill		6,088
Short-term debt		(282	)
Other liabilities		(1,566	)
Noncontrolling interest		(977	)
Total purchase consideration	$	19,694

Identifiable intangible assets

Fair values for the acquired developed technology, customer relationships, trademarks and non-competition agreements and in-process research and development (“IPR&D”) were determined based on various methods including excess earnings method, relief from royalty method and with-or-without method. The values of the developed technology and customer relationships will be amortized over an estimated useful life of 10 years. The non-competition agreements will be amortized over a two-year period. The values of trademarks will be amortized over two to five years.

The fair value of the acquired IPR&D was determined through estimates and valuation techniques based on the terms and details of the acquisition. As it was determined that the underlying projects had not reached technological feasibility at the date of acquisition, the amounts allocated to IPR&D will not be expensed until completion of the related projects. Upon the completion of development for each project, the acquired IPR&D will be amortized over its useful life.

The following table summarizes the identifiable intangible assets acquired as part of the acquisition (in thousands):

	Fair Value as of Acquisition Date April 2, 2012		Accumulated Amortization as of June 30, 2012			Net Carrying Amount as of June 30, 2012
Developed technology	$	4,400	$	(110	)	$	4,290
Customer relationships		3,000		(75	)		2,925
Trademarks		510		(38	)		472
Non-competition agreements		410		(52	)		358
In-process research and development		410		—			410
Total	$	8,730	$	(275	)	$	8,455

Goodwill

Goodwill represents the excess of the estimated acquisition consideration over the fair value of the underlying net tangible and intangible assets. The Company’s primary reasons for the PhaseLink acquisition were to complement Micrel’s high performance clock generation, distribution products for the communication market and to expand its product offerings into the consumer and industrial markets. The Company also expects the acquisition to reduce the time to develop new technologies and to provide more complete solutions for communications, consumer and industrial markets. The acquisition also enhanced the Company’s engineering resources through the addition of PhaseLink’s research and development team. These significant factors were the basis for the recognition of goodwill. The goodwill is not expected to be deductible for tax purposes.

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Litigation and Commitments and Contingencies (Details) (USD $)	12 Months Ended		3 Months Ended	6 Months Ended
	Dec. 31, 2007 Regulators	Dec. 31, 2006 Regulators	Jun. 30, 2012 Selling, general and administrative [Member]	Jun. 30, 2012 Selling, general and administrative [Member]
Settlement expense			$ 200,000	$ 200,000
Litigation and Commitments and Contingencies (Textual) [Abstract]
Nadatel purchased low-dropout voltage regulators	17,000	17,000

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Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2012

Significant Accounting Policies [Abstract]

Reconciliation of weighted-average shares used in computing net income per share

	Three Months Ended June  30,				Six Months Ended June 30,
	2012		2011		2012		2011
Weighted average common shares outstanding		60,217		62,167		60,533		62,007
Dilutive effect of stock options outstanding using the treasury stock method		620		860		686		1,050
Shares used in computing diluted net income per share attributable to Micrel, Incorporated shareholders		60,837		63,027		61,219		63,057

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Acquisition (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Apr. 02, 2012
Acquisition, Purchase Price Allocation
Cash and cash equivalents	$ 3,255
Accounts Receivable	1,119
Inventories	1,320
Other assets	273
Property, plant and equipment	1,734
Developed technology	4,400
Customer relationships	3,000
Trademarks	510
Non-competition agreement	410
In-process research and development	410
Goodwill	6,088	6,100
Short-term Debt	(282)
Other liabilities	(1,566)
Non-controlling interest	(977)
Total purchase consideration	$ 19,694

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Segment Reporting

6 Months Ended

Jun. 30, 2012

Segment Reporting [Abstract]

SEGMENT REPORTING

13. SEGMENT REPORTING

Operating segments are identified as components of an enterprise about which separate discrete financial information is available for evaluation by the chief operating decision maker. The Company has two reportable segments: standard products and other products, which consist primarily of custom and foundry products and revenues from the license of patents. The chief operating decision maker evaluates segment performance based on revenue. Accordingly, all expenses are considered corporate level activities and are not allocated to segments. Therefore, it is not practical to show profit or loss by reportable segments. Also, the chief operating decision maker does not assign assets to these segments. Consequently, it is not relevant to show assets by reportable segments.

Net Revenues by Segment	Three Months Ended June 30,						Six Months Ended June 30,
(dollars in thousands)	2012			2011			2012			2011
Net Revenues:
Standard Products	$	61,204		$	65,808		$	120,003		$	131,379
Other Products		2,495			2,702			4,847			4,625
Total net revenues	$	63,699		$	68,510		$	124,850		$	136,004
As a Percentage of Total Net Revenues:
Standard Products		96	%		96	%		96	%		97	%
Other Products		4			4			4			3
Total net revenues		100	%		100	%		100	%		100	%