TM 15AHighlyIntegratedSupIRBuck IR3477 FEATURES DESCRIPTION TM TheIR3477SupIRBuck isaneasytouse,fullyintegrated InputVoltageRange:3Vto27V andhighlyefficientDC/DCvoltageregulator.Theonboard OutputVoltageRange:0.5Vto12V constantontimehystereticcontrollerandMOSFETsmake IR3477aspaceefficientsolutionthatdeliversupto15Aof Continuous15ALoadCapability 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:IR3477Efficiency Figure1:IR3477BasicApplicationCircuit 1 March27,2013 V2.5 PD97604 EfficiencyTM 15AHighlyIntegratedSupIRBuck IR3477 ORDERINGINFORMATION IR3477 Package Tape&ReelQty PartNumber M 750 IR3477MTR1PBF M 4000 IR3477MTRPBF PBFLeadFree TRTapeandReel MPackageType MARKINGINFORMATION 3477 Site/Date/MarkingCode YWW LotCode xxxxx Pin1Identifier PINDIAGRAM o = 30 C /W JA o = 2 C /W J -PCB 2 March27,2013 V2.5 PD97604