TM 6AHighlyIntegratedSupIRBuck IR3473 FEATURES DESCRIPTION TM TheIR3473SupIRBuck isaneasytouse,fullyintegrated InputVoltageRange:3Vto27V andhighlyefficientDC/DCvoltageregulator.Theonboard OutputVoltageRange:0.5Vto12V constantontimehystereticcontrollerandMOSFETsmake IR3473aspaceefficientsolutionthatdeliversupto6Aof Continuous6ALoadCapability 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 VerySmall,LowProfile4mmx5mmQFNPackage 12Vand24VDistributedPowerSystems GeneralPurposePOLDCDCConverters GameConsolesandGraphicsCards EFFICIENCY BASICAPPLICATION 90% 85% 80% 75% VIN = 19V 70% VIN = 12V 65% VIN = 8V 60% 55% 50% 45% 0.01 0.1 1 10 Load Current (A) Figure1:IR3473BasicApplicationCircuit Figure2:IR3473Efficiency 1 March27,2013 V2.2 PD97601 EfficiencyTM 6AHighlyIntegratedSupIRBuck IR3473 ORDERINGINFORMATION IR3473 Package Tape&ReelQty PartNumber M 750 IR3473MTR1PBF M 4000 IR3473MTRPBF PBFLeadFree TRTapeandReel MPackageType MARKINGINFORMATION 3473 Site/Date/MarkingCode YWW LotCode xxxxx Pin1Identifier PINDIAGRAM o = 32 C /W JA o = 2 C /W J -PCB 2 March27,2013 V2.2 PD97601