PD97745 12AHighlyIntegratedSupIRBuck IR3894 SingleInputVoltage,SynchronousBuckRegulator - 1 - FEATURES DESCRIPTION TM TheIR3894SupIRBuck isaneasytouse,fully Single5Vto21Vapplication integratedandhighlyefficientDC/DCregulator. WideInputVoltageRangefrom1.0Vto21Vwith TheonboardPWMcontrollerandMOSFETsmake externalVcc IR3894aspaceefficientsolution,providingaccurate powerdelivery. OutputVoltageRange:0.5Vto0.86*Vin EnhancedLine/LoadRegulationwithFeedForward IR3894isaversatileregulatorwhichoffers ProgrammableSwitchingFrequencyupto1.5MHz programmableswitchingfrequencyandthefixed internalcurrentlimit InternalDigitalSoftStart/SoftStop EnableinputwithVoltageMonitoringCapability Theswitchingfrequencyisprogrammablefrom300kHz to1.5MHzforanoptimumsolution. ThermallyCompensatedCurrentLimitwithrobust hiccupmodeovercurrentprotection Italsofeaturesimportantprotectionfunctions,suchas SmartinternalLDOtoimprovelightloadandfullload PreBiasstartup,thermallycompensatedcurrentlimit efficiency overvoltageprotectionandthermalshutdowntogive ExternalSynchronizationwithSmoothClocking requiredsystemlevelsecurityintheeventoffault conditions. EnhancedPreBiasStartUp PrecisionReferenceVoltage(0.5V+/0.5%)with marginingcapability APPLICATIONS VpforTrackingApplications((Source/SinkCapability NetcomApplications +/12A) EmbeddedTelecomSystems IntegratedMOSFETdriversandBootstrapDiode ServerApplications ThermalShutDown StorageApplications ProgrammablePowerGoodOutputwithtracking capability DistributedPointofLoadPowerArchitectures MonotonicStartUp o o Operatingtemp:40 C<Tj<125 C SmallSize:5mmx6mmPQFN Leadfree,HalogenfreeandRoHSCompliant BASICAPPLICATION Figure1:IR3894BasicApplicationCircuit Figure2:IR3894Efficiency 1 JANUARY18,2013 DATASHEET Rev3.4PD97745 12AHighlyIntegratedSupIRBuck IR3894 SingleInputVoltage,SynchronousBuckRegulator - 2 - ORDERINGINFORMATION Package Tape&ReelQty PartNumber M 750 IR3894MTR1PBF IR3894 M 4000 IR3894MTRPBF PBFLeadFree TR/TP1TapeandReel MPackageType PINDIAGRAM 5mx6mmPOWERQFN (TOPVIEW) 30CW/ JA 2/CW JP- CB 2 JANUARY18,2013 DATASHEET Rev3.4