RT9198/A1DS9198/A-10November2006μAinshutdownmodeandhasfastturn-ontimelessthan50μs.Theotherfeaturesincludeultralowdropoutvoltage,highoutputaccuracy,currentlimitingprotection,andhighripplerejectionratio.AvailableintheSOT-23-3,SOT-23-5,SC-70-5,SC-82andWDFN-6L2x2packages,theRT9198/Aalsooffersarangefrom1.5Vto5.0Vwith0.1Vperstep.ApplicationszCDMA/GSMCellularHandsetszBattery-PoweredEquipmentzLaptop,Palmtops,NotebookComputerszHand-HeldInstrumentszPCMCIACardszPortableInformationAppliancesOrderingInformationFeatureszzzzzLow-NoiseforRFApplicationzzzzzFastResponseinLine/LoadTransientzzzzzQuickStart-Up(Typically50μμμμμs)zzzzz0.01μμμμμAStandbyCurrentWhenShutdownzzzzzLowDropout:220mV@300mAzzzzzWideOperatingVoltageRanges:2.5Vto5.5VzzzzzTTL-Logic-ControlledShutdownInputzzzzzLowTemperatureCoefficientzzzzzCurrentLimitingProtectionzzzzzThermalShutdownProtectionzzzzzOnly1μμμμμFOutputCapacitorRequiredforStabilityzzzzzHighPowerSupplyRejectionRatiozzzzzCustomVoltageAvailablezzzzzRoHSCompliantand100%Lead(Pb)-FreeNote:RichTekPb-freeandGreenproductsare:`RoHScompliantandcompatiblewiththecurrentrequire-mentsofIPC/JEDECJ-STD-020.`SuitableforuseinSnPborPb-freesolderingprocesses.`100%mattetin(Sn)plating.MarkingInformationFormarkinginformation,contactoursalesrepresentativedirectlyorthroughaRichTekdistributorlocatedinyourarea,otherwisevisitourwebsitefordetail.RT9198/A-PackageTypeU5:SC-70-5U5R:SC-70-5(R-Type)Y:SC-82V:SOT-23-3B:SOT-23-5BR:SOT-23-5(R-Type)QW:WDFN-6L2x2(W-Type)OperatingTemperatureRangeP:PbFreewithCommercialStandardG:Green(HalogenFreewithCommer-cialStandard)OutputVoltage15:1.5V16:1.6V:49:4.9V50:5.0V1H:1.85V2H:2.85V4G:4.75VChipEnableFunction(ActiveLow)ChipEnableFunction(ActiveHigh)RT9198/A2DS9198/A-10November2006(TOPVIEW)VINGNDVOUTRT9198COUT1uFCIN1uFVINVOUTENChipEnableOnOffVINGNDVOUTRT9198ACOUT1uFCIN1uFVINVOUTChipEnableOffOnENSOT-23-5/SC-70-5(R-Type)VINGNDNCVOUT23541EN/ENSOT-23-5/SC-70-5NCVOUTVINGND23541EN/ENWDFN-6L2x2GNDNCNCVOUTVIN541236EN/ENGNDNote:Thereisnopin1indicatorontopmarkforSC-82type,andpin1willbelowerleftpinwhenreadingtopmarkfromlefttoright.Pin2ofSC-82iswiderthanotherpins.SOT-23-3123GNDVOUTVINSC-82GNDVINVOUT4132EN/ENRT9198/A3DS9198/A-10November2006(ActiveHigh).Notethatthispinishighimpedance.Thereshouldbeapulllow100kΩresistorconnectedtoGNDwhenthecontrolsignalisfloating.ENChipEnable(ActiveLow).Notethatthispinishighimpedance.Thereshouldbeapullhigh100kΩresistorconnectedtoVINwhenthecontrolsignalisfloating.NCNoInternalConnect.GND,ExposedPadGround.ExposedpadshouldbesolderedtoPCBboardandconnectedtoGND.VOUTOutputVoltage.VINInputVoltage.Current-LimitandThermalProtectionMOSDriver+-VOUTShutdownandLogicControlVINErrorAmplifierVREFGNDEN/ENRT9198/A4DS9198/A-10November2006(Note1)zSupplyInputVoltage------------------------------------------------------------------------------------------------------6VzPowerDissipation,PD@TA=25°CSOT-23-3/SOT-23-5-------------------------------------------------------------------------------------------------------400mWSC-70-5,SC-82------------------------------------------------------------------------------------------------------------300mWWDFN-6L2x2--------------------------------------------------------------------------------------------------------------606mWzPackageThermalResistance(Note4)SOT-23-3/SOT-23-5,θJA-------------------------------------------------------------------------------------------------250°C/WSC-70-5,SC-82,θJA------------------------------------------------------------------------------------------------------333°C/WWDFN-6L2x2,θJA---------------------------------------------------------------------------------------------------------165°C/WWDFN-6L2x2,θJC--------------------------------------------------------------------------------------------------------20°C/WzJunctionTemperature-----------------------------------------------------------------------------------------------------150°CzLeadTemperature(Soldering,10sec.)-------------------------------------------------------------------------------260°CzStorageTemperatureRange--------------------------------------------------------------------------------------------−65°Cto150°CzESDSusceptibility(Note2)HBM(HumanBodyMode)----------------------------------------------------------------------------------------------2kVMM(Mac