XL1509-datasheet降压大功率芯片

Datasheet2A150KHz40VBuckDCtoDCConverterXL15091FeaturesnWide4.5Vto40VInputVoltageRangen3.3V,5V,12V,andadjustableversionsnOutputAdjustablefrom1.23Vto37VnMaximumDutyCycle100%nMinimumDropOut1.5VnFixed150KHzSwitchingFrequencyn2AConstantOutputCurrentCapabilitynInternalOptimizePowerTransistornHighefficiencynExcellentlineandloadregulationnTTLshutdowncapabilitynON/OFFpinwithhysteresisfunctionnBuiltinthermalshutdownfunctionnBuiltincurrentlimitfunctionnBuiltinsecondcurrentlimitfunctionnAvailableinSOIC8packageApplicationsnLCDMonitorandLCDTVnDigitalPhotoFramenSet-upBoxnADSLModemnTelecom/NetworkingEquipmentGeneralDescriptionTheXL1509isa150KHzfixedfrequencyPWMbuck(step-down)DC/DCconverter,capableofdrivinga2Aloadwithhighefficiency,lowrippleandexcellentlineandloadregulation.Requiringaminimumnumberofexternalcomponents,theregulatorissimpletouseandincludeinternalfrequencycompensationandafixed-frequencyoscillator.ThePWMcontrolcircuitisabletoadjustthedutyratiolinearlyfrom0to100%.Anenablefunction,anovercurrentprotectionfunctionisbuiltinside.Whensecondcurrentlimitfunctionhappens,theoperationfrequencywillbereducedfrom150KHzto50KHz.Aninternalcompensationblockisbuiltintominimizeexternalcomponentcount.Figure1.PackageTypeofXL1509Datasheet2A150KHz40VBuckDCtoDCConverterXL15092PinConfigurationsXL150913524GNDVINFEEDBACKOUTPUTON/OFF678GNDGNDGNDFigure2.PinConfigurationofXL1509(TopView)Table1PinDescriptionPinNumberPinNameDescription1VINSupplyVoltageInputPin.XL1509operatesfroma4.5Vto40VDCvoltage.BypassVintoGNDwithasuitablylargecapacitortoeliminatenoiseontheinput.2OUTPUTPowerSwitchOutputPin(SW).Outputistheswitchnodethatsuppliespowertotheoutput.5~8GNDGroundPin.Caremustbetakeninlayout.ThispinshouldbeplacedoutsideoftheSchottkyDiodetooutputcapacitorgroundpathtopreventswitchingcurrentspikesfrominducingvoltagenoiseintoXL1509.3FEEDBACKFeedbackPin(FB).Throughanexternalresistordividernetwork,Feedbacksensestheoutputvoltageandregulatesit.Thefeedbackthresholdvoltageis1.23V.4ON/OFFEnablePin.DriveON/OFFpinlowtoturnonthedevice,driveithightoturnitoff.Floatingisdefaultlow.Datasheet2A150KHz40VBuckDCtoDCConverterXL15093FunctionBlockFigure3.FunctionBlockDiagramofXL1509TypicalApplicationCircuitXL1509-5.0CINC1105180uf35VD1L168uh/2A+12VLOAD15~8423GNDVINFEEDBACKOUTPUTON/OFFONOFF5V/2ACOUT1N5820470uf35VFigure4.XL1509TypicalApplicationCircuit12V-5V/2ADatasheet2A150KHz40VBuckDCtoDCConverterXL15094OrderingInformationPartNumberMarkingIDPackageTemperatureRangeLeadFreeLeadFreePackingTypeXL1509-ADJE1XL1509-ADJE1TubeXL1509-3.3E1XL1509-3.3E1TubeXL1509-5.0E1XL1509-5.0E1TubeXL1509-12E1XL1509-12E1TubeXL1509-ADJTRE1XL1509-ADJE1Tape&ReelXL1509-3.3TRE1XL1509-3.3E1Tape&ReelXL1509-5.0TRE1XL1509-5.0E1Tape&ReelSOIC8-40oC~85oCXL1509-12TRE1XL1509-12E1Tape&ReelXLSEMIPb-freeproducts,asdesignatedwith“E1”suffixintheparnumber,areRoHScompliant.XL1509CircuitTypeBlank:TubeTR:TypeandReelE1:LeadFreeE1PackingVersionADJ:Adjust3.3:3.3V5.0:5V12:12VDatasheet2A150KHz40VBuckDCtoDCConverterXL15095AbsoluteMaximumRatings（Note1）ParameterSymbolValueUnitInputVoltageVin-0.3to45VFeedbackPinVoltageVFB-0.3toVinVON/OFFPinVoltageVON/OFF-0.3toVinVOutputSwitchPinVoltageVOutput-0.3toVinVPowerDissipationPDInternallylimitedmWThermalResistance(SOIC8)(JunctiontoAmbient,NoHeatsink,FreeAir)RJA100ºC/WOperatingJunctionTemperatureTJ-40to125ºCStorageTemperatureTSTG-65to150ºCLeadTemperature(Soldering,10sec)TLEAD260ºCESD(HBM)2000VNote1:StressesgreaterthanthoselistedunderMaximumRatingsmaycausepermanentdamagetothedevice.Thisisastressratingonlyandfunctionaloperationofthedeviceattheseoranyotherconditionsabovethoseindicatedintheoperationisnotimplied.Exposuretoabsolutemaximumratingconditionsforextendedperiodsmayaffectreliability.Datasheet2A150KHz40VBuckDCtoDCConverterXL15096XL1509-3.3ElectricalCharacteristicsTa=25℃;unlessotherwisespecified.SymbolParameterTestConditionMin.Typ.Max.UnitSystemparameterstestcircuitfigure5VOUTOutputVoltageVin=4.75Vto40VIload=0.2Ato2A3.1683.33.432VEfficiencyŋVin=12V,Vout=3.3VIout=2A-75-%XL1509-5.0ElectricalCharacteristicsTa=25℃;unlessotherwisespecified.SymbolParameterTestConditionMin.Typ.Max.UnitSystemparameterstestcircuitfigure5VOUTOutputVoltageVin=7Vto40VIload=0.2Ato2A4.855.2VEfficiencyŋVin=12V,Vout=5VIout=2A-82-%XL1509-12ElectricalCharacteristicsTa=25℃;unlessotherwisespecified.SymbolParameterTestConditionMin.Typ.Max.UnitSystemparameterstestcircuitfigure5VOUTOutputVoltageVin=15Vto40VIload=0.2Ato2A11.521212.48VEfficiencyŋVin=25V,Vout=12VIout=2A-90-%XL1509-ADJElectricalCharacteristicsTa=25℃;unlessotherwisespecified.SymbolParameterTestConditionMin.Typ.Max.UnitSystemparameterstestcircuitfigure5VOUTOutputVoltageVin=4.5Vto40VIload=0.2Ato2A1.1931.231.267VEfficiencyŋVin=12V,Vout=3VIout=2A-74-%Datasheet2A150KHz40VBuckDCtoDCConverterXL15097ElectricalCharacteristics(DCParameters)Vin=12Vforthe3.3V,5V,andAdjustableversionsandVin=24Vforthe12Vversion,GND=0V,Vin&GNDparallelconnecta220uf/50Vcapacitor;Iout=500mA,Ta=25℃;theothersfloatingunlessotherwisespecified.ParametersSymbolTestConditionMin.Typ.Max.UnitInputoperationvoltageVin