XL2001规格书(官方版).pdf

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1、5V/1.8A150KHz45VBuckDCtoDCConverterForUSBInterfaceXL2001FeaturesGeneralDescriptionnWide8Vto45Vinputvoltagerange.TheXL2001isa150KHzfixedfrequencynFixed5Voutputvoltage.PWMbuck(step-down)DC/DCconverter,nMaximum1.8Aoutputcurrent.capableofdrivinga1.8AloadwithhighnFixed150KHzswitchi

2、ngfrequency.efficiency,lowrippleandexcellentlineandnInternaloptimizepowerMOSFET.loadregulation.RequiringaminimumnHighefficiencyupto92%.numberofexternalcomponents,theregulatornBuiltinoutputshortshutdownfunction.issimpletouseandincludeinternalnExcellentlineandloadregulation.freq

3、uencycompensationandanBuiltinthermalshutdownfunction.fixed-frequencyoscillator.nBuiltincurrentlimitfunction.nAvailableinSOIC-8package.TheXL2001builtinoutputshortprotectionfunction.Whenshortprotectionfunctionhappens,thechipwillbeshutdown.Aninternalcompensationblockisbuiltintomi

4、nimizeexternalcomponentcount.ApplicationsnCarCharger.nBatteryCharger.nUSBPowerSupply.Figure1.PackageTypeofXL2001Rev1.015V/1.8A150KHz45VBuckDCtoDCConverterForUSBInterfaceXL2001PinConfigurationsFigure2.PinConfigurationofXL2001(TopView)Table1PinDescriptionPinNumberPinNameDescript

5、ion1FBFeedbackPin(FB).Thefeedbackthresholdvoltageis5V.2NCNoConnected.InternalVoltageRegulatorBypassCapacity.Intypicalsystem3VCapplication,TheVCpinconnecta1ufcapacitytoVIN.SupplyVoltageInputPin.XL2001operatesfrom8Vto45V4VINDCvoltage.BypassVintoGNDwithasuitablylargecapacitortoel

6、iminatenoiseontheinput.PowerSwitchOutputPin(SW).SWistheswitchnodethat5,6SWsuppliespowertotheoutput.GroundPin.Caremustbetakeninlayout.Thispinshouldbeplacedoutsideoftheschottkydiodetooutputcapacitorground7,8GNDpathtopreventswitchingcurrentspikesfrominducingvoltagenoiseintoXL2001

7、.Rev1.025V/1.8A150KHz45VBuckDCtoDCConverterForUSBInterfaceXL2001FunctionBlockFigure3.FunctionBlockDiagramofXL2001TypicalApplicationCircuitFigure4.XL2001TypicalApplicationCircuit(VIN=8V~45V,VOUT=5V/1.8A)Rev1.035V/1.8A150KHz45VBuckDCtoDCConverterForUSBInterfaceXL2001OrderingInfo

8、rmationPartNumberMarkingIDTemperaturePackingTypePackageLeadFr