升降压电荷泵XA2320B+3.3V

TheXA2320Bisavailableinthe6-pinSOT23-6.XA2320BhavethermalshutdowncapabilityXA2320Bideallysuitedforsmall,TheXA2320Bisalownoise,constantXA2320B1FFeeaattuurreessFixed3.3V±4%OutputVINRange:1.8Vto5VOutputCurrent:Upto150mAConstantFrequencyOperationatAllLoadsLowNoiseConstantFrequency(1.2MHz)OperationAutomaticSoft-StartReducesInrushCurrentShutdownCurrent1μAShort-CircuitProtectionNoInductorsAvailableinLowProfile6-LeadSOT23PackageAApppplliiccaattiioonn2AACellto3.3VUSBOn-The-GoDevicesWhiteLEDDriversHandheldDevicesDDeessccrriippttiioonnfrequency(1.2MHz)switchedcapacitorvoltagedoubler.Itproducearegulatedoutputvoltagefroma1.8Vto5Vinputwithupto150mAofoutputcurrent.Lowexternalpartscount(oneflyingcapacitorandtwosmallbypasscapacitorsatVINandVOUT)makethebattery-poweredapplications.Anewcharge-pumparchitecturemaintainsconstantswitchingfrequencytozeroloadandreducesbothoutputandinputripple.TheandcansurviveacontinuousshortcircuitfromVOUTtoGND.Built-insoft-startcircuitrypreventsexcessiveinrushcurrentduringstart-up.Highswitchingfrequencyenablestheuseofsmallceramiccapacitors.AlowcurrentshutdownfeaturedisconnectstheloadfromVINandreducesquiescentcurrentto1uA.LLoowwNNooiissee,,RReegguullaatteeddCChhaarrggeePPuummppDDCC//DDCCCCoonnvveerrtteerr:USBPorttoRegulated3.3VPowerSupplyFigure3:Lithium-IonBatteryto5VWhiteorBlueLEDDriversPPiinnDDeessccrriippttiioonnPINNUMBERSOT-23-6PINNAME1VOUT2GND3EN4C-5VIN6C+XA2320B(Note1)VIN……………………………….…………………………….…….….…..….………-0.3Vto6VVOUT………………………………………………………………………………….….-0.3Vto3.5VVOUTShort-circuitDuration.…………………………………………..….………………indefiniteVEN……………………………………………………...…………………….…...……-0.3Vto6VIOUT(Note2)…………………….................................………………………......................150mAOperatingTemperatureRange(Note3)……………………………………………...……-30℃to85℃LeadTemperature(Soldering10sec.)……………………………………..………………300℃StorageTemperatureRange………………………………………………..…..-65℃to125℃Note1:AbsoluteMaximumRatingsarethosevaluesbeyondwhichthelifeofadevicemaybeimpaired.Note2:Basedonlongtermcurrentdensitylimitations.Note3:ificationsfrom0°Cto70°C.Specificationsoverthe–40°Cto85°Coperatingtemperaturerangeareassuredbydesign,characterizationandcorrelationwithstatisticalprocesscontrols.EElleeccttrriiccaallCChhaarraacctteerriissttiiccssThespecificationsareatTA=25℃.VIN=3.6V，EN=VIN,CIN=COUT=2.2uFor1uFunlessotherwisenoted.PARAMETERCCOONNDDIITTIIOONNSSMINTYPMAXUNITSInputVoltageRange(VIN)1.85.5VOutputVoltageRange(VOUT)2.7VVIN5.5V,IOUT65mA3.3VISHDNShutdownCurrentEN=0V,VOUT=0V0.30.50.9μANoloadinputcurrentIOUT=0mA,VIN=2.7V1.77mAOutputcurrentlimit150mAOutputRipple(VR)IOUT=100mA20mVP-PSwitchingFrequency(fosc)1.2MHzXA2320B(IOUT=0A)3.23.213.223.233.243.253.263.273.283.293.32.533.544.55SupplyVoltage(V)OutputVoltage(V)NoLaodSupplyCurrentvs.SupplyVoltage00.10.20.30.40.50.60.70.80.912.533.544.55SupplyVoltage(V)SupplyCurrent(mA)OscillatorFrequencyvs.SupplyVoltage(IOUT=0A)0.50.60.70.80.911.11.21.31.41.52.533.544.55SupplyVoltage(V)OscillatorFrequency(MHz)ShortCircuitCurrentvs.SupplyVoltage03060901201501802102402703002.533.544.55SupplyVoltage(V)ShortCircuitCurrent(mA)XA2320B=2.7VILOAD=0AVIN=2.7VILOAD=220mAVIN=3.6VILOAD=0AXA2320B=3.6VILOAD=180mAVIN=4.2VILOAD=0mAVIN=4.2VILOAD=140mAXA2320B=5VILOAD=0mAVIN=5VILOAD=120mAXA2320B(Pin1):RegulatedOutputVoltage.VOUTshouldbebypassedwithalowESRceramiccapacitorprovidingatleast2μFofcapacitanceasclosetothepinaspossibleforbestperformance.GND(Pin2):Ground.Thesepinsshouldbetiedtoagroundplaneforbestperformance.TheexposedpadmustbesolderedtoPCBgroundtoprovideelectricalcontactandoptimumthermalperformance.EN(Pin3):ActiveLowShutdownInput.Thispinmustnotbeallowedtofloat.C-(Pin4):FlyingCapacitorNegativeTerminal.VIN(Pin5):InputSupplyVoltage.VINshouldbebypassedwitha1μFto4.7μFlowimpedanceceramiccapacitor.C+(Pin6):FlyingCapacitorPositiveTerminal.AApppplliiccaattiioonnIInnffoorrmmaattiioonnOperationVINtoaregulatedoutputvoltage.Regulationisachievedbysensingtheoutputvoltagethroughaninternalresistordividerandmodulatingthechargepumpoutputcurrentbasedontheerrorsignal.A2-phasenonoverlappingclockactivatesthechargepumpswitches.TheflyingcapacitorischargedfromVINonthefirstphaseoftheclock.OnthesecondphaseoftheclockitisstackedinserieswithVINandconnectedtoVOUT.Thissequenceofcharginganddischargingtheflyingcapacitorcontinuesatafreerunningfrequencyof1.2MHz(typ).Inshutdownmodeallcircuitryisturnedoffandthesupply.Furthermore,VOUT