Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
SIMONCIC RICHARD J
   2. Issuer Name and Ticker or Trading Symbol
MICROCHIP TECHNOLOGY INC [MCHP] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
VP, Analog and Intrfc Prod Div
(Last)
(First)
(Middle)
C/O MICROCHIP TECHNOLOGY INCORPORATED, 2355 WEST CHANDLER BOULEVARD		 3. Date of Earliest Transaction (Month/Day/Year)
02/01/2010
(Street)

CHANDLER, AZ 85224-6199		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 02/01/2010   M   1,375 A $ 26.51 79,280 (1) I Shares held Directly and Indirectly, by Trust and Reporting Person's Wife and Mother-in-Law (1)
Conmmon Stock 02/01/2010   F   534 D $ 26.51 78,746 (2) I Shares held Directly and Indirectly, by Trust and Reporting Person's Wife and Mother-in-Law (2)
Common Stock 02/01/2010   M   46 A $ 26.51 78,792 (3) I Shares held Directly and Indirectly, by Trust and Reporting Person's Wife and Mother-in-Law (3)
Common Stock 02/01/2010   F   18 D $ 26.51 78,774 (4) I Shares held Directly and Indirectly, by Trust and Reporting Person's Wife and Mother-in-Law (4)
Common Stock 02/01/2010   M   575 A $ 26.51 79,349 (5) I Shares held Directly and Indirectly, by Trust and Reporting Person's Wife and Mother-in-Law (5)
Common Stock 02/01/2010   F   223 D $ 26.51 79,126 (6) I Shares held Directly and Indirectly, by Trust and Reporting Person's Wife and Mother-in-Law (6)
Common Stock 02/01/2010   M   500 A $ 26.51 79,626 (7) I Shares held Directly and Indirectly, by Trust and Reporting Person's Wife and Mother-in-Law (7)
Common Stock 02/01/2010   F   194 D $ 26.51 79,432 (8) I Shares held Directly and Indirectly, by Trust and Reporting Person's Wife and Mother-in-Law (8)

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Restricted Stock Units $ 26.51 02/01/2010   M     1,375   (9)   (9) Common Stock 11,000 $ 0 0 D  
Restricted Stock Units $ 26.51 02/01/2010   M     46   (10)   (10) Common Stock 91 $ 0 0 D  
Restricted Stock Units $ 26.51 02/01/2010   M     575   (11)   (11) Common Stock 4,600 $ 0 4,025 D  
Restricted Stock Units $ 26.51 02/01/2010   M     500   (12)   (12) Common Stock 500 $ 0 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
SIMONCIC RICHARD J
C/O MICROCHIP TECHNOLOGY INCORPORATED
2355 WEST CHANDLER BOULEVARD
CHANDLER, AZ 85224-6199		       VP, Analog and Intrfc Prod Div  

Signatures

 Deborah L. Wussler, as Attorney-in-Fact   02/02/2010
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Of the 79,280 shares held, 7,500 shares were held Directly; 71,555 shares were held by Trust; and 225 shares were held by Reporting Person's wife and mother-in-law.
(2) Of the 78,746 shares held, 6,966 shares were held Directly; 71,555 shares were held by Trust; and 225 shares were held by Reporting Person's wife and mother-in-law.
(3) Of the 78,792 shares held, 7,012 shares were held Directly; 71,555 shares were held by Trust; and 225 shares were held by Reporting Person's wife and mother-in-law.
(4) Of the 78,774 shares held, 6,994 shares were held Directly; 71,555 shares were held by Trust; and 225 shares were held by Reporting Person's wife and mother-in-law.
(5) Of the 79,349 shares held, 7,569 shares were held Directly; 71,555 shares were held by Trust; and 225 shares were held by Reporting Person's wife and mother-in-law.
(6) Of the 79,126 shares held, 7,346 shares were held Directly; 71,555 shares were held by Trust; and 225 shares were held by Reporting Person's wife and mother-in-law.
(7) Of the 79,626 shares held, 7,846 shares were held Directly; 71,555 shares were held by Trust; and 225 shares were held by Reporting Person's wife and mother-in-law.
(8) Of the 79,432 shares held, 7,652 shares were held Directly; 71,555 shares were held by Trust; and 225 shares were held by Reporting Person's wife and mother-in-law.
(9) The restricted stock units vest in eight equal quarterly installments beginning May 1, 2008. Vested shares will be delivered to the reporting person upon vest.
(10) The restricted stock units will vest in 45 shares on November 1, 2009 and 46 shares on February 1, 2010 as long as the individual remains a service provider through the vesting date and the Company achieves performance targets for operating income in the six month period ending September 30, 2008.
(11) The restricted stock units vest in eight equal quarterly installments beginning February 1, 2010, as long as the individual remains a service provider through the vesting date and the Company achieves performance targets for operating profit in the quarter ending June 30, 2009. Vested shares will be delivered to the reporting person upon vest.
(12) The restricted stock units will vest in full on February 1, 2010 as long as the individual remains a service provider through the vesting date and the Company achieves performance targets for operating profit in the quarter ended June 30, 2009. Vested shares will be delivered to the reporting person upon vest.

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