LR6232-Ver-0.1---低成本低压差可控LDO

/56232ķĸĹĺĻ„INTRODUCTIONThe/56232seriesareagroupofpositivevoltageregulatorsmanufacturedbyCMOStechnologieswithultralowpowerconsumptionandlowdropoutvoltage,whichprovidelargeoutputcurrentsevenwhenthedifferenceoftheinput-outputvoltageissmall.The/56232seriescandeliver300mAoutputcurrentandallowaninputvoltageashighas8V.Theseriesareverysuitableforthebattery-poweredequipments,suchasRFapplicationsandothersystemsrequiringaquietvoltagesource.„FEATURESzLowQuiescentCurrent:0.8ȝAzOperatingVoltageRange:1.8V̚8VzOutputCurrent:300mAzLowDropoutVoltage˖110mV@100mA(VOUT=3.3V)zOutputVoltage:1.2~5.0VzHighAccuracy:±2ˁ/±1ˁ˄Typ.˅zHighPowerSupplyRejectionRatio:50dB@1kHzzLowOutputNoise:27xVOUTȝVRMS(10Hz~100kHz)zExcellentLineandLoadTransientResponsezBuilt-inCurrentLimiter,Short-CircuitProtection„APPLICATIONSzPortableconsumerequipmentszRadiocontrolsystemszLaptop,PalmtopsandPDAszWirelessCommunicationEquipmentszPortableAudioVideoEquipmentszUltraLowPowerMicrocontroller„BLOCKDIAGRAM„ORDERINFORMATIONDESIGNATORSYMBOLDESCRIPTIONķAStandardBHighActive,pull-downresistorbuiltin,withCOUTdischargeresistorĸĹIntegerOutputVoltagee.g.1.8V=ĸ:1,Ĺ:8ĺFPackage:DFN1X1-4M/MC/MYPackage:SOT-23-3MPackage:SOT-23-5P/PT/PLPackage:SOT-89-3T/TA/TBPackage:TO-92Ļ-2%Accuracy11%AccuracyUltraLowCurrentConsumption300mACMOSVoltageRegulatorLESHANRADIOCOMPANY,LTD.Ver0.11/10LR6232Series„PINCONFIGURATIONSOT-23-3SOT-23-5DFN1X1-4SOT-89-3TO-92PINNUMBERPINNAMEFUNCTIONSOT-23-3SOT-89-3TO-92MMCMYPPTPLTTATB133122122VSSGround221313331VOUTOutput312231213VINPowerinputSOT-23-5DFN1X1-4„ABSOLUTEMAXIMUMRATINGS(1)(Unlessotherwisespecified,TA=25°C)PARAMETERSYMBOLRATINGSUNITSInputVoltage(2)VIN-0.3~9VOutputVoltage(2)VOUT-0.3~VIN+0.3VOutputCurrentIOUT600mAPowerDissipationSOT-23PD0.4WDFN1X1-40.4WSOT-890.6WTO-920.6WOperatingJunctionTemperatureRangeTj-40~125°CStorageTemperatureTstg-40~125°CLeadTemperature(Soldering,10sec)Tsolder260°CPINNUMBERSYMBOLFUNCTION1VINPowerInputPin2VSSGround3CEChipEnablePin4NCNoConnection5VOUTOutputPinPINNUMBERSYMBOLFUNCTIONF1VOUTOutputPin2VSSGround3CEChipEnablePin4VINPowerInputPinLESHANRADIOCOMPANY,LTD.Ver0.12/10Note:(1)Stressesbeyondthoselistedunderabsolutemaximumratingsmaycausepermanentdamagetothedevice.Thesearestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunderrecommendedoperatingconditionsisnotimplied.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmyaffectdevicereliability.(2)Allvoltagesarewithrespecttonetworkgroundterminal.„RECOMMENDEDOPERATINGCONDITIONSPARAMETERMIN.NOM.MAX.UNITSSupplyvoltageatVIN1.88VOperatingjunctiontemperaturerange,Tj-40125°COperatingfreeairtemperaturerange,TA-4085°C„ELECTRICALCHARACTERISTICS/56232Series(VIN=VOUT+1V,CIN=COUT=1ȝFˈˈTA=25,unlessotherwisespecified)ćPARAMETERSYMBOLCONDITIONSMIN.TYP.(3)MAX.UNITSInputVoltageVIN1.8ˉ8VOutputVoltageRangeVOUT1.2ˉ5VDCOutputAccuracyIOUT=1mA-2ˉ2%-1ˉ1%DropoutVoltageVdif(4)IOUT=100mA,VOUT=3.3Vˉ110ˉmVSupplyCurrentISSIOUT=01.2V”VOUT”3.3Vˉ0.81.3ȝA3.3VVOUT”5.0V1.01.5ȝAStandbyCurrentISTBYCE=VSS0.1ȝALineRegulationο୓୙୘୓୙୘ൈο୍୒IOUT=10mAVOUT+1V”VIN”8Vˉ0.050.3%/VLoadRegulation¨VOUTVIN=VOUT+1V,1mA”IOUT”100mAˉ10ˉmVTemperatureCoefficientο୓୙୘୓୙୘ൈο୅IOUT=10mA,-40°CTA125°C100ppmOutputCurrentLimitILIMVOUT=0.5xVOUT(Normal),VIN=5V550700850mAShortCurrentISHORTVOUT=VSSˉ20ˉmAPowerSupplyRejectionRatioPSRRIOUT=50mA100Hz70dB1kHzˉ50ˉ10kHzˉ40ˉ100kHzˉ35ˉOutputNoiseVoltageVONBW=10Hzto100kHzˉ27xVOUTˉȝVRMSCEHighVoltageVCE“H”1.5VINVCELowVoltageVCE“L”0.3VLESHANRADIOCOMPANY,LTD.Ver0.13/10Note:(3)Typicalnumbersareat25°Candrepresentthemostlikelynorm.(4)Vdif˖TheDifferenceOfOutputVoltageAndInputVoltageWhenInputVoltageIsDecreasedGraduallyTillOutputVoltageEqualsTo98%OfVOUT(E).„TYPICALAPPLICATIONCIRCUIT„APPLICATIONINFORMATIONSelectionofInput/OutputCapacitorsIngeneral,allthecapacitorsneedtobelowleakage.Anyleakagethecapacitorshavewillreduceefficiency,increasethequiescentcurrent.ArecenttrendinthedesignofportabledeviceshasbeentouseceramiccapacitorstofilterDC-DCconverterinputs.Ceramiccapacitorsareoftenchosenbecauseoftheirsmallsize,lowequivalentseriesresistance(ESR)andhighRMScurrentcapability.Also,recently,designershavebeenlookingtoceramiccapacitorsduetoshortagesoftantalumcapacitors.Unfortunately,usingceramiccapacitorsforinputfilteringcancauseproblems.Applyingavoltagesteptoaceramiccapacitorcausesalargecurrentsurgethatstoresenergyintheinductancesofthepowerleads.Alargevoltagespikeiscreatedwhenthestoredenergyistransferredfromtheseinductancesintotheceramiccapacitor.Thesevoltagespikescaneasilybetwicetheamplitudeoftheinputvoltagestep.Manytypesofcapacitorscanbeusedforinputbypassing,however,cautionmustbeexercisedwhenusingmultilayerceramiccapacitors(MLCC).Becauseoftheself-resonantandhighQcharacteristicsofsometypesofceramiccapacitors,highvoltagetransientscanbegeneratedundersomestart-upconditions,suchasconnectingtheLDOinputtoalivepowersource.Addinga3ȍҏresistorinserieswithanX5Rceramiccapacitorwillminimizestart-upvoltagetransients.TheLDOalsorequiresanoutputcapacitorforloopstability.Connecta1ȝFtantalumcapac