-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 EM3zUZy9rb7A+vneFaCAJR8CiVYbAll2p5JzAVls2Y2EGLjH+mVg/knlQ2QhI1gF
 q0BX75M8ZlpfjDKnT9sNuA==

<SEC-DOCUMENT>0000827054-03-000010.txt : 20030723
<SEC-HEADER>0000827054-03-000010.hdr.sgml : 20030723
<ACCEPTANCE-DATETIME>20030722183418
ACCESSION NUMBER:		0000827054-03-000010
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030722
FILED AS OF DATE:		20030723

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LAMBERT DAVID S
		CENTRAL INDEX KEY:			0001181939

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-21184
		FILM NUMBER:		03797189

	MAIL ADDRESS:	
		STREET 1:		2355 W CHANDLER BLVD
		CITY:			CHANDLER
		STATE:			AZ
		ZIP:			85224-6199

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MICROCHIP TECHNOLOGY INC
		CENTRAL INDEX KEY:			0000827054
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				860629024
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0331

	BUSINESS ADDRESS:	
		STREET 1:		2355 W CHANDLER BLVD
		CITY:			CHANDLER
		STATE:			AZ
		ZIP:			85224-6199
		BUSINESS PHONE:		4807867200

	MAIL ADDRESS:	
		STREET 1:		2355 WEST CHANDLER BLVD
		CITY:			CHANDLER
		STATE:			AZ
		ZIP:			85224-6199
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0101</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-07-22</periodOfReport>
    <issuer>
        <issuerCik>0000827054</issuerCik>
        <issuerName>MICROCHIP TECHNOLOGY INC</issuerName>
        <issuerTradingSymbol>MCHP</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId>
            <rptOwnerCik>0001181939</rptOwnerCik>
            <rptOwnerName>LAMBERT DAVID S</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>VP, Fab Operations</officerTitle></reportingOwnerRelationship></reportingOwner><nonDerivativeSecurity><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-07-22</value></transactionDate><deemedExecutionDate><value>2003-07-22</value></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>M</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>70312</value></transactionShares><transactionValue><value>4.066</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>401602</value><footnoteId id="F1"/></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I
</value></directOrIndirectOwnership><natureOfOwnership><value>Direct and Indirect by reporting person's children</value><footnoteId id="F1"/></natureOfOwnership></ownershipNature></nonDerivativeSecurity><nonDerivativeSecurity><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-07-22</value></transactionDate><deemedExecutionDate><value>2003-07-22</value></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>S</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>70312</value></transactionShares><transactionValue><value>24.6304</value></transactionValue><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>331290</value><footnoteId id="F2"/></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value
>I</value></directOrIndirectOwnership><natureOfOwnership><value>Direct and Indirect by reporting person's children</value><footnoteId id="F2"/></natureOfOwnership></ownershipNature></nonDerivativeSecurity><nonDerivativeSecurity><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-07-22</value></transactionDate><deemedExecutionDate><value>2003-07-22</value></deemedExecutionDate><transactionCoding><transactionFormType>5</transactionFormType><transactionCode>G</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>25000</value></transactionShares><transactionValue><value>25.07</value></transactionValue><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>306290</value><footnoteId id="F3"/></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value
>I</value></directOrIndirectOwnership><natureOfOwnership><value>Direct and Indirect by reporting person's children</value><footnoteId id="F3"/></natureOfOwnership></ownershipNature></nonDerivativeSecurity><derivativeSecurity><securityTitle><value>Common Stock</value></securityTitle><conversionOrExercisePrice><value>4.066</value></conversionOrExercisePrice><transactionDate><value>2003-07-22</value></transactionDate><deemedExecutionDate><value>2003-07-22</value></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>M</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>70312</value></transactionShares><transactionValue><value>0</value></transactionValue><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>1997-07-22</value></exerciseDate><expirationDate><value>2004-07-22</value></expirationDate><underlyingSecurity><underly
ingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>70312</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>0</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeSecurity><footnotes><footnote id="F1">Of the 401,602 shares held, 397,602 shares were held Directly; 1,000 shares were held by the reporting person's son; 1,000 shares were held by the reporting person's daughter; 1,000 shares were held by the reporting person's son; and 1,000 shares were held by the reporting person's daughter.</footnote><footnote id="F2">Of the 331,290 shares held, 327,290 shares were held Directly; 1,000 shares were held by the reporting person's son; 1,000 shares were held by the reporting person's daughter; 1,000 shares were held by t
he reporting person's son; and 1,000 shares were held by the reporting person's daughter.</footnote><footnote id="F3">Of the 306,290 shares held, 302,290 shares were held Directly; 1,000 shares were held by the reporting person's son; 1,000 shares were held by the reporting person's daughter; 1,000 shares were held by the reporting person's son; and 1,000 shares were held by the reporting person's daughter.</footnote></footnotes><ownerSignature><signatureName>David S. Lambert</signatureName><signatureDate>2003-07-22</signatureDate></ownerSignature></ownershipDocument>

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</SEC-DOCUMENT>
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