1、Rev1.2 XL40168A180KHz40VBuckDCtoDCConverterRev1.2 #Rev1.2 #FeaturesnWide8Vto40VInputVoltageRangenOutputAdjustablefrom1.25Vto36VnMaximumDutyCycle100%nMinimumDropOut0.3VnFixed180KHzSwitchingFrequencyn8AConstantOutputCurrentCapabilitynInternalOptimizePowerMOSFETnHighefficiencyupto96%nExcellentlineandlo

2、adregulationnBuiltinthermalshutdownfunctionnBuiltincurrentlimitfunctionnBuiltinoutputshortprotectionfunctionnBuiltininputovervoltageprotectionnAvailableinTO220-5LpackageApplicationsnLCDMonitorandLCDTVnPortableinstrumentpowersupplynTelecom/NetworkingEquipmentGeneralDescriptionTheXL4016isa180KHzfixedf

3、requencyPWMbuck(step-down)DC/DCconverter,capableofdrivinga8Aloadwithhighefficiency,lowrippleandexcellentlineandloadregulation.Requiringaminimumnumberofexternalcomponents,theregulatorissimpletouseandincludeinternalfrequencycompensationandafixed-frequencyoscillator.ThePWMcontrolcircuitisabletoadjustth

4、edutyratiolinearlyfrom0to100%.Anovercurrentprotectionfunctionisbuiltinside.Whenshortprotectionfunctionhappens,theoperationfrequencywillbereducedfrom180KHzto48KHz.Aninternalcompensationblockisbuiltintominimizeexternalcomponentcount.Rev1.2 #Rev1.2 #XLSEMIDatasheet8A180KHz40VBuckDCtoDCConverterXL4016Re

5、v1.2 PinConfigurationsXLSEMIDatasheet8A180KHz40VBuckDCtoDCConverterXL4016Rev1.2 #XLSEMIDatasheet8A180KHz40VBuckDCtoDCConverterXL4016Rev1.2 #Figure2.PinConfigurationofXL4016(TopView)XLSEMIDatasheet8A180KHz40VBuckDCtoDCConverterXL4016Rev1.2 #XLSEMIDatasheet8A180KHz40VBuckDCtoDCConverterXL4016Rev1.2 #1

6、2345GNDFBSWVCVINTable1PinDescriptionPinNumberPinNameDescriptionGroundPin.Caremustbetakeninlayout.ThispinshouldbeplacedoutsideoftheSchottkyDiodetooutputcapacitorgroundpathtopreventswitchingcurrentspikesfrominducingvoltagenoiseintoXL4016.FeedbackPin(FB).Throughanexternalresistordividernetwork,FBsenses

7、theoutputvoltageandregulatesit.Thefeedbackthresholdvoltageis1.25V.PowerSwitchOutputPin(SW).SWistheswitchnodethatsuppliespowertotheoutput.InternalVoltageRegulatorBypassCapacity.Intypicalsystemapplication,TheVCpinconnecta1ufcapacitytoVIN.SupplyVoltageInputPin.XL4016operatesfroma8Vto40VDCvoltage.Bypass

8、VintoGNDwithasuitablylargecapacitortoeliminatenoiseontheinput.XLSEMIDatasheet8A180KHz40VBuckDCtoDCConverterXL4016Rev1.2 XLSEMIDatasheet8A180KHz40VBuckDCtoDCConverterXL4016Rev1.2 FunctionBlock3.3nF：nVC20mD220mV200mV竿亦+CurrentLimitPiji.iiierFWOSUSPL：UMPI+3.3V1.25V20KQ1:1ULO3.3VRegulator1.25VReferenceS

9、tartUpOscillator18liKHz.43KHzThermalShutdoiAmDriverLatchFigure3.FunctionBlockDiagramofXL4016TypicalApplicationCircuitFigure4.XL4016TypicalApplicationCircuit(VIN=8V40V,VOUT=5V/8A)XLSEMIDatasheetRev1.2 XLSEMIDatasheetRev1.2 #8A180KHz40VBuckDCtoDCConverterXL4016OrderingInformationOrderInformationMarkin

10、gIDXL4016E1XL4016E1PackageTypeTO220-5LPackingTypeSuppliedAsTubeXLSEMIDatasheetRev1.2 #XLSEMIDatasheetRev1.2 #XLSEMIPb-freeproducts,asdesignatedwith“E1suffixintheparnumber,areRoHScompliant.XLSEMIDatasheetRev1.2 #XLSEMIDatasheetRev1.2 #AbsoluteMaximumRatings(Note1)ParameterInputVoltageFeedbackPinVolta

11、geOutputSwitchPinVoltagePowerDissipationThermalResistance(TO220-5L)(JunctiontoAmbient,NoHeatsink,FreeAir)OperatingJunctionTemperatureStorageTemperatureLeadTemperature(Soldering,10sec)ESD(HBM)SymbolValueUnitVin-0.3to45VVFB-0.3toVinVVOutput-0.3toVinVPDInternallylimitedmWRJA30c/wTJTSTG-40to125c-65to150

12、cTLEAD260c2000VXLSEMIDatasheetRev1.2 #XLSEMIDatasheetRev1.2 Note1:StressesgreaterthanthoselistedunderMaximumRatingsmaycausepermanentdamagetothedevice.Thisisastressratingonlyandfunctionaloperationofthedeviceattheseoranyotherconditionsabovethoseindicatedintheoperationisnotimplied.Exposuretoabsolutemax

13、imumratingconditionsforextendedperiodsmayaffectreliability.8A180KHz40VBuckDCtoDCConverterXL4016i_XL4016ElectricalCharacteristicsT=25C;unlessotherwisespecified.aSymbolParameterTestConditionMin.Typ.Max.UnitSystemparameterstestcircuitfigure4VFBFeedbackVoltageVin=8Vto40V,Vout=5VIload=0.5Ato8A1.2251.251.

14、275VEfficiencyVin=12V,Vout=5VIout=6A-87-%EfficiencyVin=24V,Vout=12VIout=6A-93-%ElectricalCharacteristics(DCParameters)Vin=12V,GND=0V,Vin&GNDparallelconnecta470uf/50Vcapacitor;Iout=500mA,T=a25C;theothersfloatingunlessotherwisespecified.ParametersSymbolTestConditionMin.Typ.Max.UnitInputoperationvoltag

15、eVin840VQuiescentSupplyCurrentIqVFB=Vin2.15mAOscillatorFrequencyFosc144180216KHzOutputShortFrequencyFosp48KHzSwitchCurrentLimitILVFB=010AMax.DutyCycleDMAXVFB=0V100%OutputPowerPMOSRdsonVFB=0V,Vin=12V,ISW=8A4050mohmVinOverVoltageProtectionOVP45VXLSEMIDatasheet8A180KHz40VBuckDCtoDCConverterXL4016Rev1.2

16、 XLSEMIDatasheet8A180KHz40VBuckDCtoDCConverterXL4016Rev1.2 Figure5.XL4016SystemParametersTestCircuit(VIN=8V40V,VOUT=5V/8A)100959085807570656055500.00.51.01.52.02.53.03.54.04.55.05.56.06.57.07.58.0Loadcurrent(A)EfficiencyVSLoadcurrentXLSEMIDatasheet8A180KHz40VBuckDCtoDCConverterXL4016Rev1.2 #XLSEMIDa

17、tasheet8A180KHz40VBuckDCtoDCConverterXL4016Rev1.2 #Figure6.XL4016SystemEfficiencyCurveXLSEMIDatasheet8A180KHz40VBuckDCtoDCConverterXL4016Rev1.2 XLSEMIDatasheet8A180KHz40VBuckDCtoDCConverterXL4016Rev1.2 #TypicalSystemApplication(VOUT=12V/6A)XLSEMIDatasheet8A180KHz40VBuckDCtoDCConverterXL4016Rev1.2 #X

18、LSEMIDatasheet8A180KHz40VBuckDCtoDCConverterXL4016Rev1.2 #EfficiencyVSLoadcurrent100959085807570656055500.00.51.01.52.02.53.03.54.04.55.05.56.0Loadcurrent(A)Figure8.XL4016SystemEfficiencyCurveDatasheet8A180KHz40VBuckDCtoDCConverterXL4016Rev1.2 TypicalSystemApplication(TTLshutdownfunction)Logiclevels

19、ignalsshutdownfunctioncanbeusedintypicalsystemapplicationwithexternalcomponents.WhentheTTLhighvoltageabove3.3V(referencedtoground,lowerthanVIN),theconverterwillshutdown,inputcurrentlessthan5mA;whentheTTLLowvoltagebelow0.8V(referencedtoground),theconverterwillturnon.XLSEMIDatasheetRev1.2 SchottkyDiodeSelectionTableCurrentSurfaceMountThroughHoleVR(Thesameassystemmaximuminputvoltage).20V30V40V50V60V1AV1N58171N58181N58193AV1N58201N58211N5822VMBR320MBR330MBR340MBR350MBR360VSK32SK33SK34SK35SK36V30WQ0330WQ0430WQ05V31DQ0331D