GENERALDESCRIPTIONThePW2058/PW2059isac***tantfrequency,currentmodestep-downconverter.ThedeviceintegratesamainswitchandasynchronousrectifierforhighefficiencywithoutanexternalSchottkydiode.ItisidealforpoweringportableequipmentthatrunsfromasinglecellLithium-Ion(Li+)battery.Theoutputvoltagecanberegulatedaslowas0.6V.ThePW2058/PW2059canalsorunat100%dutycycleforlowdropoutoperation,extendingbatterylifeinportablesystem.Thisdeviceofferstwooperationmodes,PWMcontrolandPFMModeswitchingcontrol,whichallowsahighefficiencyoverthewiderrangeoftheload.FEATURESHighEfficiency:Upto96%1.5MHzC***tantFrequencyOperation800mAOutputCurrentNoSchottkyDiodeRequired2Vto6VInputVoltageRangeOutputVoltageasLowas0.6VPFMModeforHighEfficiencyinLightLoad100%DutyCycleinDropoutOperationLowQuiescentCurrent:20μASlopeCompensatedCurrentModeControlforExcellentLineandLoadTransientResp***eShortCircuitProtectionThermalFaultProtectionInrushCurrentLimitandSoftStart<1μAShutdownCurrentSOT23-5packageAPPLICATI***Cellularand***artPhonesWirelessandDSLModemsPDAsPortableInstrumentsDigitalStillandVideoCamerasDTV)