TM 12AHighlyIntegratedSupIRBuck IR3476 FEATURES DESCRIPTION TM TheIR3476SupIRBuck isaneasytouse,fullyintegrated InputVoltageRange:3Vto27V andhighlyefficientDC/DCvoltageregulator.Theonboard OutputVoltageRange:0.5Vto12V constantontimehystereticcontrollerandMOSFETsmake IR3476aspaceefficientsolutionthatdeliversupto12Aof Continuous12ALoadCapability preciselycontrolledoutputvoltage. ConstantOnTimeControl CompensationLoopnotRequired Programmableswitchingfrequency,softstart,and thermallycompensatedovercurrentprotectionallowsfor ExcellentEfficiencyatVeryLowOutputCurrents averyflexiblesolutionsuitableformanydifferent ProgrammableSwitchingFrequencyandSoftStart applicationsandanidealchoiceforbatterypowered applications. ThermallyCompensatedOverCurrentProtection PowerGoodOutput Additionalfeaturesincludeprebiasstartup,veryprecise 0.5Vreference,under/overvoltageshutdown,thermal PrecisionVoltageReference(0.5V,+/1%) protection,powergoodoutput,andenableinputwith EnableInputwithVoltageMonitoringCapability voltagemonitoringcapability. PrebiasStartUp ThermalShutDown APPLICATIONS Under/OverVoltageFaultProtection NotebookandDesktopComputers ForcedContinuousConductionModeOption ConsumerElectronicsSTB,LCD,TV,Printers Small,LowProfile5mmx6mmQFNPackage 12Vand24VDistributedPowerSystems GeneralPurposePOLDCDCConverters GameConsolesandGraphicsCards EFFICIENCY BASICAPPLICATION 95% 85% 75% 19VIN 12VIN 65% 8VIN 55% 45% 0.01 0.1 1 10 100 Load Current (A) Figure2:IR3476Efficiency Figure1:IR3476BasicApplicationCircuit 1 March27,2013 V2.2 PD97603 EfficiencyTM 12AHighlyIntegratedSupIRBuck IR3476 ORDERINGINFORMATION IR3476 Package Tape&ReelQty PartNumber M 750 IR3476MTR1PBF M 4000 IR3476MTRPBF PBFLeadFree TRTapeandReel MPackageType MARKINGINFORMATION 3476 Site/Date/MarkingCode YWW LotCode xxxxx Pin1Identifier PINDIAGRAM o = 30 C /W JA o = 2 C /W J -PCB 2 March27,2013 V2.2 PD97603