TD1509芯片规格书.pdf

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1、Datasheet2A150KHZPWMBuckDC/DCConverterTD1509GeneralDescriptionFeaturesTheTD1509isaofeasytouseadjustable•3,3V,5VandAdjustableoutputversionsstep-down(buck)switch-modevoltageregulator.•Outputadjustablefrom1.23vto43VThedeviceisavailableinanadjustableoutput•Fixed150KHzfrequencyinternaloscillatorversion

2、.Itiscapableofdrivinga2Aloadwith•Guaranteed2Aoutputloadcurrentexcellentlineandloadregulation.•Inputvoltagerangeupto45V•Lowpowerstandbymode,IQtypically50µARequiringaminimumnumberofexternal•TTLshutdowncapabilitycomponents,theseregulatorsaresimpletouse•Excellentlineandloadregulationandincludeinternal

3、frequencycompensation,and•Highefficiencyafixed-frequencyoscillator.•Thermalshutdownandcurrentlimitprotection•AvailableinadvantagedSOP8DIP8packageTheoutputvoltageisguaranteedto±3%toleranceunderspecifiedinputvoltageandApplicationsoutputloadconditions.Theoscillatorfrequencyisguaranteedto±15%.External

4、shutdownis•SimpleHigh-efficiencystep-downregulatorincluded,featuringtypically50µAstandbycurrent.•On-cardswitchingregulatorsSelfprotectionfeaturesincludeatwostage•Positivetonegativeconverterfrequencyreducingcurrentlimitfortheoutput•LCDmonitorandLCDTVswitchandanovertemperatureshutdownfor•DVDrecorder

5、andPDPTVcompleteprotectionunderfaultconditions.•Batterycharger•Step-downto3.3VformicroprocessorsTheTD1509isavailableinSOP8DIP8package.PackageTypesDIP8SOP8Figure1.PackageTypesofTD1509December,20,2005.TechcodeSemiconductorLimited1Datasheet2A150KHZPWMBuckDC/DCConverterTD1509PinDescriptionsPinAssignme

6、ntsPinNameDescription1VinInputsupplyvoltage2OutputSwitchingoutput5~8GndGroundSOP8/DIP83FeedbackOutputvoltagefeedback4ON/OFFON/OFFshutdownActiveis“Low”orfloatingOrderingInformationTD1509XXOutputVersionsCircuitTypeR:AdjustableOutput3:FixedOutput3.3V5:FixedOutput5VPackageP:SOP8D:DIP8December,20,2005.

7、TechcodeSemiconductorLimited2Datasheet2A150KHZPWMBuckDC/DCConverterTD1509FunctionalBlockDiagramFigure2.FunctionalBlockDiagramofTD1509TypicalApplicationDecember,20,2005.TechcodeSemiconductorLimited3Datasheet2A150K