    <SEC-DOCUMENT>0001193125-18-152803-index.html : 20180504
    <SEC-HEADER>0001193125-18-152803.hdr.sgml : 20180504
    <ACCEPTANCE-DATETIME>20180504161713
    ACCESSION NUMBER:		0001193125-18-152803
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		8
    CONFORMED PERIOD OF REPORT:	20180614
    FILED AS OF DATE:		20180504
    DATE AS OF CHANGE:		20180504
    EFFECTIVENESS DATE:		20180504

    FILER:

    	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

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-06395
    		FILM NUMBER:		18808151

    	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>DEF 14A
    <SEQUENCE>1
    <FILENAME>d547394ddef14a.htm
    <DESCRIPTION>DEFINITIVE PROXY STATEMENT
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    Document 1 - file: d547394ddef14a.htm

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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: g547394g02g78.jpg

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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: g547394g02p21.jpg

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    <DOCUMENT>
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    <SEQUENCE>4
    <FILENAME>g547394g05k87.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: g547394g05k87.jpg

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    <DOCUMENT>
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    <SEQUENCE>5
    <FILENAME>g547394g09b78.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: g547394g09b78.jpg

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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: g547394g42x22.jpg

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    <SEQUENCE>7
    <FILENAME>g547394g61j93.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: g547394g61j93.jpg

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    <DOCUMENT>
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    <SEQUENCE>8
    <FILENAME>g547394g81k33.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: g547394g81k33.jpg

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