-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0000827054-09-000204.txt : 20091103
<SEC-HEADER>0000827054-09-000204.hdr.sgml : 20091103
<ACCEPTANCE-DATETIME>20091103185117
ACCESSION NUMBER:		0000827054-09-000204
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20091101
FILED AS OF DATE:		20091103
DATE AS OF CHANGE:		20091103

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Bjornholt James Eric
		CENTRAL INDEX KEY:			0001452681

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-21184
		FILM NUMBER:		091155881

	MAIL ADDRESS:	
		STREET 1:		MICROCHIP TECHNOLOGY INCORPORATED
		STREET 2:		2355 WEST CHANDLER BOULEVARD
		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:		480-792-7200

	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>
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<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2009-11-01</periodOfReport>

    <issuer>
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        <issuerName>MICROCHIP TECHNOLOGY INC</issuerName>
        <issuerTradingSymbol>MCHP</issuerTradingSymbol>
    </issuer>

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            <rptOwnerName>Bjornholt James Eric</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O MICROCHIP TECHNOLOGY INCORPORATED</rptOwnerStreet1>
            <rptOwnerStreet2>2355 WEST CHANDLER BOULEVARD</rptOwnerStreet2>
            <rptOwnerCity>CHANDLER</rptOwnerCity>
            <rptOwnerState>AZ</rptOwnerState>
            <rptOwnerZipCode>85224-6199</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP and CFO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

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            <transactionAmounts>
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                <transactionAcquiredDisposedCode>
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                <transactionCode>M</transactionCode>
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                <transactionShares>
                    <value>106</value>
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                <transactionPricePerShare>
                    <value>24.09</value>
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                <transactionAcquiredDisposedCode>
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    <derivativeTable>
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            </conversionOrExercisePrice>
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                <footnoteId id="F1"/>
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            <underlyingSecurity>
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                <underlyingSecurityShares>
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        <derivativeTransaction>
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            </securityTitle>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>31</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
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                <transactionAcquiredDisposedCode>
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            <expirationDate>
                <footnoteId id="F1"/>
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            <securityTitle>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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                <transactionShares>
                    <value>76</value>
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                <transactionPricePerShare>
                    <value>0</value>
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                <transactionAcquiredDisposedCode>
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            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
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                    <value>Common Stock</value>
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                <underlyingSecurityShares>
                    <value>76</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
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                </sharesOwnedFollowingTransaction>
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        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>24.09</value>
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            <transactionDate>
                <value>2009-11-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>77</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F3"/>
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            <expirationDate>
                <footnoteId id="F3"/>
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                    <value>Common Stock</value>
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                <underlyingSecurityShares>
                    <value>77</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>462</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>24.09</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2009-11-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>106</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F4"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F3"/>
                <footnoteId id="F4"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>106</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">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.</footnote>
        <footnote id="F2">The restricted stock units will vest 50% on 11/1/09 and 50% on 2/1/10 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.</footnote>
        <footnote id="F3">The restricted stock units will vest in one installment of 76 shares on August 1, 2009, and in seven equal quarterly installments of 77 shares each beginning November 1, 2009.  Vested shares will be delivered to the reporting person upon vest.</footnote>
        <footnote id="F4">The restricted stock units will vest in full on the first business day of the month following the first anniversary of the date of grant.  Vested shares will be delivered to the reporting person upon vest.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Deborah L. Wussler, as Attorney-in-Fact</signatureName>
        <signatureDate>2009-11-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----