<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e3b70-003f-7cd1-81e2-3997805c22f9,g:c450e46a-70f5-4127-b3df-1fc8c43d7c05-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:smtc="http://www.semtech.com/20260426" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.semtech.com/20260426">
  <xs:import namespace="http://fasb.org/srt/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/country/2025" schemaLocation="https://xbrl.sec.gov/country/2025/country-2025.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2025" schemaLocation="https://xbrl.sec.gov/dei/2025/dei-2025.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/ecd/2025" schemaLocation="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd"/>
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="smtc-20260426_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="smtc-20260426_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="smtc-20260426_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="smtc-20260426_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="CoverPage" roleURI="http://www.semtech.com/role/CoverPage">
        <link:definition>0000001 - Document - Cover Page</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofOperationsunaudited" roleURI="http://www.semtech.com/role/CondensedConsolidatedStatementsofOperationsunaudited">
        <link:definition>9952151 - Statement - Condensed Consolidated Statements of Operations (unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsOfComprehensiveIncomeunaudited" roleURI="http://www.semtech.com/role/CondensedConsolidatedStatementsOfComprehensiveIncomeunaudited">
        <link:definition>9952152 - Statement - Condensed Consolidated Statements Of Comprehensive Income (unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedBalanceSheetsunaudited" roleURI="http://www.semtech.com/role/CondensedConsolidatedBalanceSheetsunaudited">
        <link:definition>9952153 - Statement - Condensed Consolidated Balance Sheets (unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedBalanceSheetsunauditedParenthetical" roleURI="http://www.semtech.com/role/CondensedConsolidatedBalanceSheetsunauditedParenthetical">
        <link:definition>9952154 - Statement - Condensed Consolidated Balance Sheets (unaudited) (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsofStockholdersEquityunaudited" roleURI="http://www.semtech.com/role/ConsolidatedStatementsofStockholdersEquityunaudited">
        <link:definition>9952155 - Statement - Consolidated Statements of Stockholders' Equity (unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofCashFlowsunaudited" roleURI="http://www.semtech.com/role/CondensedConsolidatedStatementsofCashFlowsunaudited">
        <link:definition>9952156 - Statement - Condensed Consolidated Statements of Cash Flows (unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OrganizationandBasisofPresentation" roleURI="http://www.semtech.com/role/OrganizationandBasisofPresentation">
        <link:definition>9952157 - Disclosure - Organization and Basis of Presentation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsperShare" roleURI="http://www.semtech.com/role/EarningsperShare">
        <link:definition>9952158 - Disclosure - Earnings per Share</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensation" roleURI="http://www.semtech.com/role/ShareBasedCompensation">
        <link:definition>9952159 - Disclosure - Share-Based Compensation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Availableforsalesecurities" roleURI="http://www.semtech.com/role/Availableforsalesecurities">
        <link:definition>9952160 - Disclosure - Available-for-sale securities</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurements" roleURI="http://www.semtech.com/role/FairValueMeasurements">
        <link:definition>9952161 - Disclosure - Fair Value Measurements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Inventories" roleURI="http://www.semtech.com/role/Inventories">
        <link:definition>9952162 - Disclosure - Inventories</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssets" roleURI="http://www.semtech.com/role/GoodwillandIntangibleAssets">
        <link:definition>9952163 - Disclosure - Goodwill and Intangible Assets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LongTermDebt" roleURI="http://www.semtech.com/role/LongTermDebt">
        <link:definition>9952164 - Disclosure - Long-Term Debt</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxes" roleURI="http://www.semtech.com/role/IncomeTaxes">
        <link:definition>9952165 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Leases" roleURI="http://www.semtech.com/role/Leases">
        <link:definition>9952166 - Disclosure - Leases</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingencies" roleURI="http://www.semtech.com/role/CommitmentsandContingencies">
        <link:definition>9952167 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Restructuring" roleURI="http://www.semtech.com/role/Restructuring">
        <link:definition>9952168 - Disclosure - Restructuring</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConcentrationofRisk" roleURI="http://www.semtech.com/role/ConcentrationofRisk">
        <link:definition>9952169 - Disclosure - Concentration of Risk</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformation" roleURI="http://www.semtech.com/role/SegmentInformation">
        <link:definition>9952170 - Disclosure - Segment Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockRepurchaseProgram" roleURI="http://www.semtech.com/role/StockRepurchaseProgram">
        <link:definition>9952171 - Disclosure - Stock Repurchase Program</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativesandHedgingActivities" roleURI="http://www.semtech.com/role/DerivativesandHedgingActivities">
        <link:definition>9952172 - Disclosure - Derivatives and Hedging Activities</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OrganizationandBasisofPresentationPolicy" roleURI="http://www.semtech.com/role/OrganizationandBasisofPresentationPolicy">
        <link:definition>9955511 - Disclosure - Organization and Basis of Presentation (Policy)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsperShareTables" roleURI="http://www.semtech.com/role/EarningsperShareTables">
        <link:definition>9955512 - Disclosure - Earnings per Share (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensationTables" roleURI="http://www.semtech.com/role/ShareBasedCompensationTables">
        <link:definition>9955513 - Disclosure - Share-Based Compensation (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AvailableforsalesecuritiesTables" roleURI="http://www.semtech.com/role/AvailableforsalesecuritiesTables">
        <link:definition>9955514 - Disclosure - Available-for-sale securities (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsTables" roleURI="http://www.semtech.com/role/FairValueMeasurementsTables">
        <link:definition>9955515 - Disclosure - Fair Value Measurements (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InventoriesTables" roleURI="http://www.semtech.com/role/InventoriesTables">
        <link:definition>9955516 - Disclosure - Inventories (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssetsTables" roleURI="http://www.semtech.com/role/GoodwillandIntangibleAssetsTables">
        <link:definition>9955517 - Disclosure - Goodwill and Intangible Assets (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LongTermDebtTables" roleURI="http://www.semtech.com/role/LongTermDebtTables">
        <link:definition>9955518 - Disclosure - Long-Term Debt (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesTables" roleURI="http://www.semtech.com/role/IncomeTaxesTables">
        <link:definition>9955519 - Disclosure - Income Taxes (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesTables" roleURI="http://www.semtech.com/role/LeasesTables">
        <link:definition>9955520 - Disclosure - Leases (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesTables" roleURI="http://www.semtech.com/role/CommitmentsandContingenciesTables">
        <link:definition>9955521 - Disclosure - Commitments and Contingencies (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RestructuringTables" roleURI="http://www.semtech.com/role/RestructuringTables">
        <link:definition>9955522 - Disclosure - Restructuring (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConcentrationofRiskTables" roleURI="http://www.semtech.com/role/ConcentrationofRiskTables">
        <link:definition>9955523 - Disclosure - Concentration of Risk (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationTables" roleURI="http://www.semtech.com/role/SegmentInformationTables">
        <link:definition>9955524 - Disclosure - Segment Information (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativesandHedgingActivitiesTables" roleURI="http://www.semtech.com/role/DerivativesandHedgingActivitiesTables">
        <link:definition>9955525 - Disclosure - Derivatives and Hedging Activities (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsperShareComputationofBasicandDilutedEarningsperShareDetails" roleURI="http://www.semtech.com/role/EarningsperShareComputationofBasicandDilutedEarningsperShareDetails">
        <link:definition>9955526 - Disclosure - Earnings per Share - Computation of Basic and Diluted Earnings per Share (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensationAllocationofShareBasedCompensationDetails" roleURI="http://www.semtech.com/role/ShareBasedCompensationAllocationofShareBasedCompensationDetails">
        <link:definition>9955527 - Disclosure - Share-Based Compensation - Allocation of Share-Based Compensation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensationNarrativeDetails" roleURI="http://www.semtech.com/role/ShareBasedCompensationNarrativeDetails">
        <link:definition>9955528 - Disclosure - Share-Based Compensation - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AvailableforsalesecuritiesSummaryOfInvestmentsDetails" roleURI="http://www.semtech.com/role/AvailableforsalesecuritiesSummaryOfInvestmentsDetails">
        <link:definition>9955529 - Disclosure - Available-for-sale securities - Summary Of Investments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsFinancialAssetsandLiabilitiesMeasuredandRecordedatFairValueonaRecurringBasisDetails" roleURI="http://www.semtech.com/role/FairValueMeasurementsFinancialAssetsandLiabilitiesMeasuredandRecordedatFairValueonaRecurringBasisDetails">
        <link:definition>9955530 - Disclosure - Fair Value Measurements - Financial Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsCarryingValueandFairValueofDebtDetails" roleURI="http://www.semtech.com/role/FairValueMeasurementsCarryingValueandFairValueofDebtDetails">
        <link:definition>9955531 - Disclosure - Fair Value Measurements - Carrying Value and Fair Value of Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsInvestmentImpairmentsandCreditLossReservesDetails" roleURI="http://www.semtech.com/role/FairValueMeasurementsInvestmentImpairmentsandCreditLossReservesDetails">
        <link:definition>9955532 - Disclosure - Fair Value Measurements - Investment Impairments and Credit Loss Reserves (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InventoriesSummaryofInventoriesDetails" roleURI="http://www.semtech.com/role/InventoriesSummaryofInventoriesDetails">
        <link:definition>9955533 - Disclosure - Inventories - Summary of Inventories (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssetsGoodwillDetails" roleURI="http://www.semtech.com/role/GoodwillandIntangibleAssetsGoodwillDetails">
        <link:definition>9955534 - Disclosure - Goodwill and Intangible Assets - Goodwill (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssetsChangesinCarryingAmountsofGoodwillDetails" roleURI="http://www.semtech.com/role/GoodwillandIntangibleAssetsChangesinCarryingAmountsofGoodwillDetails">
        <link:definition>9955535 - Disclosure - Goodwill and Intangible Assets - Changes in Carrying Amounts of Goodwill (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssetsNarrativeDetails" roleURI="http://www.semtech.com/role/GoodwillandIntangibleAssetsNarrativeDetails">
        <link:definition>9955536 - Disclosure - Goodwill and Intangible Assets - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssetsScheduleofFiniteLivedIntangibleAssetsDetails" roleURI="http://www.semtech.com/role/GoodwillandIntangibleAssetsScheduleofFiniteLivedIntangibleAssetsDetails">
        <link:definition>9955537 - Disclosure - Goodwill and Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssetsScheduleofFiniteLivedIntangibleAssetAmortizationDetails" roleURI="http://www.semtech.com/role/GoodwillandIntangibleAssetsScheduleofFiniteLivedIntangibleAssetAmortizationDetails">
        <link:definition>9955538 - Disclosure - Goodwill and Intangible Assets - Schedule of Finite-Lived Intangible Asset Amortization (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssetsScheduleofFutureAmortizationExpenseDetails" roleURI="http://www.semtech.com/role/GoodwillandIntangibleAssetsScheduleofFutureAmortizationExpenseDetails">
        <link:definition>9955539 - Disclosure - Goodwill and Intangible Assets - Schedule of Future Amortization Expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssetsScheduleofConstructioninProcessDetails" roleURI="http://www.semtech.com/role/GoodwillandIntangibleAssetsScheduleofConstructioninProcessDetails">
        <link:definition>9955540 - Disclosure - Goodwill and Intangible Assets - Schedule of Construction in Process (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LongTermDebtScheduleofLongtermDebtDetails" roleURI="http://www.semtech.com/role/LongTermDebtScheduleofLongtermDebtDetails">
        <link:definition>9955541 - Disclosure - Long-Term Debt - Schedule of Long-term Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LongTermDebtCreditAgreementDetails" roleURI="http://www.semtech.com/role/LongTermDebtCreditAgreementDetails">
        <link:definition>9955542 - Disclosure - Long-Term Debt - Credit Agreement (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LongTermDebtConvertibleSeniorNotesdue2027Details" roleURI="http://www.semtech.com/role/LongTermDebtConvertibleSeniorNotesdue2027Details">
        <link:definition>9955543 - Disclosure - Long-Term Debt - Convertible Senior Notes due 2027 (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LongTermDebtConvertibleSeniorNotesdue2028Details" roleURI="http://www.semtech.com/role/LongTermDebtConvertibleSeniorNotesdue2028Details">
        <link:definition>9955544 - Disclosure - Long-Term Debt - Convertible Senior Notes due 2028 (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LongTermDebtConvertibleSeniorNotesdue2030Details" roleURI="http://www.semtech.com/role/LongTermDebtConvertibleSeniorNotesdue2030Details">
        <link:definition>9955545 - Disclosure - Long-Term Debt - Convertible Senior Notes due 2030 (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LongTermDebtScheduleofInterestExpenseDetails" roleURI="http://www.semtech.com/role/LongTermDebtScheduleofInterestExpenseDetails">
        <link:definition>9955546 - Disclosure - Long-Term Debt - Schedule of Interest Expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesSummaryofIncomeTaxContingenciesDetails" roleURI="http://www.semtech.com/role/IncomeTaxesSummaryofIncomeTaxContingenciesDetails">
        <link:definition>9955547 - Disclosure - Income Taxes - Summary of Income Tax Contingencies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesNarrativeDetails" roleURI="http://www.semtech.com/role/IncomeTaxesNarrativeDetails">
        <link:definition>9955548 - Disclosure - Income Taxes - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesLiabilityForUncertainTaxPositionsDetails" roleURI="http://www.semtech.com/role/IncomeTaxesLiabilityForUncertainTaxPositionsDetails">
        <link:definition>9955549 - Disclosure - Income Taxes - Liability For Uncertain Tax Positions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesRegionalIncomeLossFromContinuingOperationsBeforeIncomeTaxesDetails" roleURI="http://www.semtech.com/role/IncomeTaxesRegionalIncomeLossFromContinuingOperationsBeforeIncomeTaxesDetails">
        <link:definition>9955550 - Disclosure - Income Taxes - Regional Income (Loss) From Continuing Operations Before Income Taxes (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesNarrativeDetails" roleURI="http://www.semtech.com/role/LeasesNarrativeDetails">
        <link:definition>9955551 - Disclosure - Leases - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesTheComponentsofLeaseExpenseDetails" roleURI="http://www.semtech.com/role/LeasesTheComponentsofLeaseExpenseDetails">
        <link:definition>9955552 - Disclosure - Leases - The Components of Lease Expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesSupplementalCashFlowInformationDetails" roleURI="http://www.semtech.com/role/LeasesSupplementalCashFlowInformationDetails">
        <link:definition>9955553 - Disclosure - Leases - Supplemental Cash Flow Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesSupplementalBalanceSheetInformationDetails" roleURI="http://www.semtech.com/role/LeasesSupplementalBalanceSheetInformationDetails">
        <link:definition>9955554 - Disclosure - Leases - Supplemental Balance Sheet Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesMaturityDetails" roleURI="http://www.semtech.com/role/LeasesMaturityDetails">
        <link:definition>9955555 - Disclosure - Leases - Maturity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesMaturityDetails_1" roleURI="http://www.semtech.com/role/LeasesMaturityDetails_1">
        <link:definition>9955555 - Disclosure - Leases - Maturity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesNarrativeDetails" roleURI="http://www.semtech.com/role/CommitmentsandContingenciesNarrativeDetails">
        <link:definition>9955556 - Disclosure - Commitments and Contingencies - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesScheduleofLiabilityforDeferredCompensationDetailsDetails" roleURI="http://www.semtech.com/role/CommitmentsandContingenciesScheduleofLiabilityforDeferredCompensationDetailsDetails">
        <link:definition>9955557 - Disclosure - Commitments and Contingencies - Schedule of Liability for Deferred Compensation (Details) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RestructuringNarrativeDetails" roleURI="http://www.semtech.com/role/RestructuringNarrativeDetails">
        <link:definition>9955558 - Disclosure - Restructuring - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RestructuringActivityDetails" roleURI="http://www.semtech.com/role/RestructuringActivityDetails">
        <link:definition>9955559 - Disclosure - Restructuring - Activity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConcentrationofRiskScheduleofSignificantCustomersAccountingforatLeast10ofNetSalesDuringPeriodDetails" roleURI="http://www.semtech.com/role/ConcentrationofRiskScheduleofSignificantCustomersAccountingforatLeast10ofNetSalesDuringPeriodDetails">
        <link:definition>9955560 - Disclosure - Concentration of Risk - Schedule of Significant Customers Accounting for at Least 10% of Net Sales During Period (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationNarrativeDetails" roleURI="http://www.semtech.com/role/SegmentInformationNarrativeDetails">
        <link:definition>9955561 - Disclosure - Segment Information - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationNetSalesActivitybySegmentDetails" roleURI="http://www.semtech.com/role/SegmentInformationNetSalesActivitybySegmentDetails">
        <link:definition>9955562 - Disclosure - Segment Information - Net Sales Activity by Segment (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationNetSalesActivitybyGeographicRegionDetails" roleURI="http://www.semtech.com/role/SegmentInformationNetSalesActivitybyGeographicRegionDetails">
        <link:definition>9955563 - Disclosure - Segment Information - Net Sales Activity by Geographic Region (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationSummaryofSalesActivitytoCountriesthatRepresentedGreaterthan10ofTotalNetSalesDetails" roleURI="http://www.semtech.com/role/SegmentInformationSummaryofSalesActivitytoCountriesthatRepresentedGreaterthan10ofTotalNetSalesDetails">
        <link:definition>9955564 - Disclosure - Segment Information - Summary of Sales Activity to Countries that Represented Greater than 10% of Total Net Sales (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockRepurchaseProgramNarrativeDetails" roleURI="http://www.semtech.com/role/StockRepurchaseProgramNarrativeDetails">
        <link:definition>9955565 - Disclosure - Stock Repurchase Program - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativesandHedgingActivitiesSummaryofOpenForeignCurrencyContractsDetails" roleURI="http://www.semtech.com/role/DerivativesandHedgingActivitiesSummaryofOpenForeignCurrencyContractsDetails">
        <link:definition>9955566 - Disclosure - Derivatives and Hedging Activities - Summary of Open Foreign Currency Contracts (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativesandHedgingActivitiesNarrativeDetails" roleURI="http://www.semtech.com/role/DerivativesandHedgingActivitiesNarrativeDetails">
        <link:definition>9955567 - Disclosure - Derivatives and Hedging Activities - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:element id="smtc_CostOfGoodsAndServiceExcludingDepreciationDepletionAmortizationAndImpairment" abstract="false" name="CostOfGoodsAndServiceExcludingDepreciationDepletionAmortizationAndImpairment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_IncomeLossFromContinuingOperationsBeforeIncomeLossFromEquityMethodInvestments" abstract="false" name="IncomeLossFromContinuingOperationsBeforeIncomeLossFromEquityMethodInvestments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_GainLossonDispositionofBusinessandPropertyPlantandEquipment" abstract="false" name="GainLossonDispositionofBusinessandPropertyPlantandEquipment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_AccruedPurchasesOfIntangibleAssets" abstract="false" name="AccruedPurchasesOfIntangibleAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_NoncashOrPartNoncashAcquisitionHoldbackAmount" abstract="false" name="NoncashOrPartNoncashAcquisitionHoldbackAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_LiabilityForUncertainTaxPositionsTableTextBlock" abstract="false" name="LiabilityForUncertainTaxPositionsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="smtc_AssetsAndLiabilitiesLesseeTableTextBlock" abstract="false" name="AssetsAndLiabilitiesLesseeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="smtc_ScheduleOfLiabilityForDeferredCompensationTableTextBlock" abstract="false" name="ScheduleOfLiabilityForDeferredCompensationTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="smtc_SummaryOfSalesActivityToCountriesThatRepresentedGreaterThan10OfTotalNetSalesTableTextBlock" abstract="false" name="SummaryOfSalesActivityToCountriesThatRepresentedGreaterThan10OfTotalNetSalesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="smtc_ConvertibleSeniorNotesDue2027Member" abstract="true" name="ConvertibleSeniorNotesDue2027Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_ConvertibleSeniorNotesDue2028Member" abstract="true" name="ConvertibleSeniorNotesDue2028Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_ProductDevelopmentAndEngineeringMember" abstract="true" name="ProductDevelopmentAndEngineeringMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_EmployeeStockUnitAwardsMember" abstract="true" name="EmployeeStockUnitAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_FinancialMetricBasedRestrictedStockUnitsRSUsMember" abstract="true" name="FinancialMetricBasedRestrictedStockUnitsRSUsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_ShareBasedCompensationSettlementTypeAxis" abstract="true" name="ShareBasedCompensationSettlementTypeAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="smtc_ShareBasedCompensationSettlementTypeDomain" abstract="true" name="ShareBasedCompensationSettlementTypeDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_SettledWithSharesMember" abstract="true" name="SettledWithSharesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_SettledInCashMember" abstract="true" name="SettledInCashMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_NonEmployeeDirectorStockUnitAwardsMember" abstract="true" name="NonEmployeeDirectorStockUnitAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndUnsettledInPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndUnsettledInPeriod" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="smtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceLevelPercentage" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceLevelPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="smtc_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsPerformancePeriod" abstract="false" name="SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsPerformancePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="smtc_ConvertibleSeniorNotesDue2030Member" abstract="true" name="ConvertibleSeniorNotesDue2030Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_DebtSecuritiesAllowanceForCreditLoss" abstract="false" name="DebtSecuritiesAllowanceForCreditLoss" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_DebtSecuritiesAllowanceForCreditLossPeriodIncreaseDecrease" abstract="false" name="DebtSecuritiesAllowanceForCreditLossPeriodIncreaseDecrease" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_SignalIntegrityProductsGroupMember" abstract="true" name="SignalIntegrityProductsGroupMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_AdvancedProtectionAndSensingProductsGroupMember" abstract="true" name="AdvancedProtectionAndSensingProductsGroupMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_IoTSystemMember" abstract="true" name="IoTSystemMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_CapitalizedDevelopmentCostsMember" abstract="true" name="CapitalizedDevelopmentCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_FiniteLivedIntangibleAssetsImpairedAccumulatedImpairmentLoss" abstract="false" name="FiniteLivedIntangibleAssetsImpairedAccumulatedImpairmentLoss" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour" abstract="false" name="FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_FiniteLivedIntangibleAssetsPlacedInService" abstract="false" name="FiniteLivedIntangibleAssetsPlacedInService" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_CreditAgreementMaturesOnJanuary122028Member" abstract="true" name="CreditAgreementMaturesOnJanuary122028Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_CreditAgreementMember" abstract="true" name="CreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_CreditAgreementFinancialCovenantReliefPeriodMember" abstract="true" name="CreditAgreementFinancialCovenantReliefPeriodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_DebtInstrumentInterestPeriodAxis" abstract="true" name="DebtInstrumentInterestPeriodAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="smtc_DebtInstrumentInterestPeriodDomain" abstract="true" name="DebtInstrumentInterestPeriodDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_DebtInstrumentOneMonthInterestPeriodMember" abstract="true" name="DebtInstrumentOneMonthInterestPeriodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_DebtInstrumentThreeMonthInterestPeriodMember" abstract="true" name="DebtInstrumentThreeMonthInterestPeriodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_DebtInstrumentSixMonthInterestPeriodMember" abstract="true" name="DebtInstrumentSixMonthInterestPeriodMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_TriggeringEventAxis" abstract="true" name="TriggeringEventAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="smtc_TriggeringEventDomain" abstract="true" name="TriggeringEventDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_TriggeringEventOneMember" abstract="true" name="TriggeringEventOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_TriggeringEventTwoMember" abstract="true" name="TriggeringEventTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_LineOfCreditFacilityIncreaseInCapacity" abstract="false" name="LineOfCreditFacilityIncreaseInCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_LineOfCreditFacilityMaximumBorrowingCapacityForeignCurrency" abstract="false" name="LineOfCreditFacilityMaximumBorrowingCapacityForeignCurrency" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_DebtInstrumentCovenantAnnualAmortization" abstract="false" name="DebtInstrumentCovenantAnnualAmortization" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="smtc_DebtInstrumentMaturityNumberOfDaysBeforeMaturityDateIfNotExtended" abstract="false" name="DebtInstrumentMaturityNumberOfDaysBeforeMaturityDateIfNotExtended" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="smtc_DebtInstrumentMaturityExtensionNumberOfDaysAfterMaturityDate" abstract="false" name="DebtInstrumentMaturityExtensionNumberOfDaysAfterMaturityDate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="smtc_DebtInstrumentCovenantNonExtendedNotesAndCertainReplacementDebtThreshold" abstract="false" name="DebtInstrumentCovenantNonExtendedNotesAndCertainReplacementDebtThreshold" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_LineOfCreditDecreaseInMaximumBorrowingCapacity" abstract="false" name="LineOfCreditDecreaseInMaximumBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_DebtInstrumentCovenantLeverageRatioMaximum" abstract="false" name="DebtInstrumentCovenantLeverageRatioMaximum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="smtc_DebtInstrumentCovenantLiquidityRatioRequiredMinimum" abstract="false" name="DebtInstrumentCovenantLiquidityRatioRequiredMinimum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="smtc_DebtHedgedByInterestRateDerivatives" abstract="false" name="DebtHedgedByInterestRateDerivatives" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_DebtInstrumentConvertibleTermsOfConversionAxis" abstract="true" name="DebtInstrumentConvertibleTermsOfConversionAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="smtc_DebtInstrumentConvertibleTermsOfConversionDomain" abstract="true" name="DebtInstrumentConvertibleTermsOfConversionDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_DebtConversionTermsOneMember" abstract="true" name="DebtConversionTermsOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_DebtConversionTermsTwoMember" abstract="true" name="DebtConversionTermsTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_DebtInstrumentRedemptionPriceThresholdTradingDay" abstract="false" name="DebtInstrumentRedemptionPriceThresholdTradingDay" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="smtc_DebtInstrumentFaceAmountNotSubjectToRedemption" abstract="false" name="DebtInstrumentFaceAmountNotSubjectToRedemption" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_ConversionPricePercentageFundamentalChangeRepurchase" abstract="false" name="ConversionPricePercentageFundamentalChangeRepurchase" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="smtc_ClassOfWarrantOrRightAndDebtInstrumentNetCashPremium" abstract="false" name="ClassOfWarrantOrRightAndDebtInstrumentNetCashPremium" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_AdjustmentsToAdditionalPaidInCapitalInducedConversionOfConvertibleNotes" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalInducedConversionOfConvertibleNotes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_AdjustmentsToAdditionalPaidInCapitalUnwindOfConvertibleNoteHedge" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalUnwindOfConvertibleNoteHedge" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_DebtInstrumentCovenantMinimumPrincipalAmountOfNotesOutstanding" abstract="false" name="DebtInstrumentCovenantMinimumPrincipalAmountOfNotesOutstanding" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_InterestIncomeExpenseDerivativeInstrumentTermination" abstract="false" name="InterestIncomeExpenseDerivativeInstrumentTermination" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_NoncurrentdeferredtaxassetMember" abstract="true" name="NoncurrentdeferredtaxassetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_LesseeOperatingLeaseTerminationPeriod" abstract="false" name="LesseeOperatingLeaseTerminationPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="smtc_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" abstract="false" name="LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_HarmanBeckerAutomotiveSystemsGmbHMember" abstract="true" name="HarmanBeckerAutomotiveSystemsGmbHMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_SierraWirelessMember" abstract="true" name="SierraWirelessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_PaymentsTowardsTheRemedialActionPlan" abstract="false" name="PaymentsTowardsTheRemedialActionPlan" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_DeferredCompensationPlanForOfficersAndExecutivesMember" abstract="true" name="DeferredCompensationPlanForOfficersAndExecutivesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_CustomerAMember" abstract="true" name="CustomerAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_CustomerBMember" abstract="true" name="CustomerBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_CustomerCMember" abstract="true" name="CustomerCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_CustomerDMember" abstract="true" name="CustomerDMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_SemiconductorProductsGroupMember" abstract="true" name="SemiconductorProductsGroupMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_IoTSystemsAndConnectivityMember" abstract="true" name="IoTSystemsAndConnectivityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortizationAdjusted" abstract="false" name="CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortizationAdjusted" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_GrossMarginPercent" abstract="false" name="GrossMarginPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="smtc_StockRepurchaseProgramIncreaseInAuthorizedAmount" abstract="false" name="StockRepurchaseProgramIncreaseInAuthorizedAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smtc_SellUSDBuyCADForwardContractMember" abstract="true" name="SellUSDBuyCADForwardContractMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_SellUSDBuyCHFForwardContractMember" abstract="true" name="SellUSDBuyCHFForwardContractMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_SellUSDBuyGBPForwardContractMember" abstract="true" name="SellUSDBuyGBPForwardContractMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_GregoryFischerMember" abstract="true" name="GregoryFischerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smtc_JasonGreenMember" abstract="true" name="JasonGreenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
