<SEC-DOCUMENT>0001593968-18-001247.txt : 20180924
<SEC-HEADER>0001593968-18-001247.hdr.sgml : 20180924
<ACCEPTANCE-DATETIME>20180924173209
ACCESSION NUMBER:		0001593968-18-001247
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20180920
FILED AS OF DATE:		20180924
DATE AS OF CHANGE:		20180924

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Cardenuto Rodolpho C
		CENTRAL INDEX KEY:			0001753689

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-06395
		FILM NUMBER:		181084267

	MAIL ADDRESS:	
		STREET 1:		200 FLYNN ROAD
		CITY:			CAMARILLO
		STATE:			CA
		ZIP:			93012-8790

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SEMTECH CORP
		CENTRAL INDEX KEY:			0000088941
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				952119684
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0129

	BUSINESS ADDRESS:	
		STREET 1:		200 FLYNN ROAD
		CITY:			CAMARILLO
		STATE:			CA
		ZIP:			93012-8790
		BUSINESS PHONE:		8054982111

	MAIL ADDRESS:	
		STREET 1:		200 FLYNN ROAD
		CITY:			CAMARILLO
		STATE:			CA
		ZIP:			93012-8790
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>primary_01.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2018-09-20</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000088941</issuerCik>
        <issuerName>SEMTECH CORP</issuerName>
        <issuerTradingSymbol>SMTC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001753689</rptOwnerCik>
            <rptOwnerName>Cardenuto Rodolpho C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>200 FLYNN RD.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CAMARILLO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>93012</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle>Board of Directors</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <remarks>On September 20, 2018 Mr. Cardenuto was appointed to the company's Board of Directors.</remarks>

    <ownerSignature>
        <signatureName>/s/Rodolpho C Cardenuto by Charles B. Ammann under Power of Attorney dated September 18, 2018 (Copy Attached)</signatureName>
        <signatureDate>2018-09-24</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>cardenutopoa.txt
<DESCRIPTION>EX-24 DOCUMENT
<TEXT>
POWER OF ATTORNEY

The undersigned, Rodolpho C Cardenuto, hereby constitutes and
appoints Emeka Chukwu and Charles B. Ammann, each of them,
jointly and severally, his lawful attorney in fact and agent,
with full power of substitution and resubstitution, for him
and in his name, place and stead, in any and all capacities,
to execute and file with the Securities and Exchange Commission
and any stock exchange or similar authority (or any other
governmental or regulatory authority) Forms ID, 3, 4 and 5 under
Section 16(a) of the Securities Exchange Act of 1934, as amended
(the Act) and the rules thereunder, or any other appropriate
form, and all amendments thereto with all exhibits and any and
all documents required to be filed with respect thereto, relating
to his holdings or beneficial ownership of securities issued by
Semtech Corporation, a corporation organized under the laws of
the State of Delaware (the Corporation), granting unto said
attorneys in fact and agents, and each of them, full power and
authority to do and perform each and every act and thing requisite
or necessary to be done as fully to all intents and purposes as
he might or could do in person, hereby ratifying and confirming
all that said attorneys in fact and agents, and each of them, or
his substitute or substitutes, may do or lawfully cause to
be done by virtue hereof.

The undersigned acknowledges that the foregoing attorneys in fact
and agents, solely by virtue of serving in such capacity at the
request of the undersigned, are not assuming, nor is the Corporation
assuming, any of the undersigneds responsibilities to comply with
Section 16 of the Act.

This Power of Attorney shall remain in full force and effect until
the undersigned is no longer required to file Forms ID, 3, 4 and 5 with
respect to the undersigneds holdings or beneficial ownership of
and transactions in securities issued by the Corporation, unless
earlier revoked by the undersigned in a writing delivered to the
foregoing attorneys in fact.


/s/ Rodolpho C Cardenuto
September 18, 2018
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
