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5V/3.2A150KHz40VBuckDCtoDCConverterForUSBInterfaceXL2013Rev1.0(step-down)DC/DCconverter,capableofdrivinga3.2Aloadwithhighefficiency,lowrippleandexcellentlineandloadregulation.Requiringaminimumnumberofexternalcomponents,theregulatorissimpletouseandincludeinternalfrequencycompensationandafixed-frequencyoscillator.TheXL2013builtinoutputshortprotectionfunction.Whenshortprotectionfunctionhappens,thechipwillbeshutdown.Aninternalcompensationblockisbuiltintominimizeexternalcomponentcount.Figure1.PackageTypeofXL20135V/3.2A150KHz40VBuckDCtoDCConverterForUSBInterfaceXL2013Rev1.0(TopView)Table1PinDescriptionPinNumberPinNameDescription1GNDGroundPin.Caremustbetakeninlayout.ThispinshouldbeplacedoutsideoftheSchottkyDiodetooutputcapacitorgroundpathtopreventswitchingcurrentspikesfrominducingvoltagenoiseintoXL2013.2FBFeedbackPin(FB).Thefeedbackthresholdvoltageis5V.3SWPowerSwitchOutputPin(SW).SWistheswitchnodethatsuppliespowertotheoutput.4VCInternalVoltageRegulatorBypassCapacity.Intypicalsystemapplication,TheVCpinconnecta1ufcapacitytoVIN.5VINSupplyVoltageInputPin.XL2013operatesfrom8Vto40VDCvoltage.BypassVintoGNDwithasuitablylargecapacitortoeliminatenoiseontheinput.5V/3.2A150KHz40VBuckDCtoDCConverterForUSBInterfaceXL2013Rev1.0(VIN=8V~40V,VOUT=5V/3.2A)5V/3.2A150KHz40VBuckDCtoDCConverterForUSBInterfaceXL2013Rev1.0“E1”suffixintheparnumber,areRoHScompliant.AbsoluteMaximumRatings（Note1）ParameterSymbolValueUnitInputVoltageVin-0.3to45VFeedbackPinVoltageVFB-0.3toVinVOutputSwitchPinVoltageVOutput-0.3toVinVPowerDissipationPDInternallylimitedmWThermalResistance(TO252-5L)(JunctiontoAmbient,NoHeatsink,FreeAir)RJA50ºC/WOperatingJunctionTemperatureTJ-40to125ºCStorageTemperatureTSTG-65to150ºCLeadTemperature(Soldering,10sec)TLEAD260ºCESD(HBM)2000VNote1:StressesgreaterthanthoselistedunderMaximumRatingsmaycausepermanentdamagetothedevice.Thisisastressratingonlyandfunctionaloperationofthedeviceattheseoranyotherconditionsabovethoseindicatedintheoperationisnotimplied.Exposuretoabsolutemaximumratingconditionsforextendedperiodsmayaffectreliability.5V/3.2A150KHz40VBuckDCtoDCConverterForUSBInterfaceXL2013Rev1.0=25℃;unlessotherwisespecified.SymbolParameterTestConditionMin.Typ.Max.UnitSystemparameterstestcircuitfigure4VFBFeedbackVoltageVin=8Vto40V,Vout=5VIload=0.5Ato3.2A4.955.1VEfficiencyŋVin=12V,Vout=5VIout=3.2A-87-%ElectricalCharacteristics(DCParameters)Vin=12V,GND=0V,Vin&GNDparallelconnecta100uF/50Vcapacitor;Iout=500mA,Ta=25℃;theothersfloatingunlessotherwisespecified.ParametersSymbolTestConditionMin.Typ.Max.UnitInputoperationvoltageVin840VQuiescentSupplyCurrentIqVFB=Vin4.710mAOutputShortSupplyCurrentIosp5mAOscillatorFrequencyFosc127150173KHzSwitchCurrentLimitILVFB=03.5AOutputPowerPMOSRdsonVFB=0V,Vin=12V,ISW=3.2A7090mohmDatasheet5V/3.2A150KHz40VBuckDCtoDCConverterForUSBInterfaceXL2013Rev1.0(VOUT=5V/3.2A)Figure5.XL2013SystemParametersTestCircuit(VIN=8V~40V,VOUT=5V/3.2A)050010001500200025003000350040000.00.51.01.52.02.53.03.54.04.55.05.5OutputvoltalgeVSOutputcurrentOutputvoltage(V)Outputcurrent(mA)VIN=12V,VOUT=5VFigure6.XL2013SystemOutputConstantCurrentCurveDatasheet5V/3.2A150KHz40VBuckDCtoDCConverterForUSBInterfaceXL2013Rev1.0(%)Loadcurrent(A)Vin=8V,Vout=5VVin=12V,Vout=5VVin=24V,Vout=5VVin=36V,Vout=5VFigure7.XL2013SystemEfficiencyCurveDatasheet5V/3.2A150KHz40VBuckDCtoDCConverterForUSBInterfaceXL2013Rev1.0，ifoutputloadisfloating,thenconverterwillrestartup,theoutputvoltagewillreturntonormal;ifoutputloadisn’tfloating,thenconvertermustbepowerreset,theoutputvoltagewillcomeback.Figure8.Theconverterwillbeshutdownwhenoutputshorthappen.8101214161820222426283032343638401.01.11.21.31.41.51.61.71.81.92.0InputcurrentVSInputvoltageInputcurrent(mA)Inputvoltage(V)Figure9.Theinput