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January23,2008LM3410PowerWise®525kHz/1.6MHz,ConstantCurrentBoostandSEPICLEDDriverwithInternalCompensationGeneralDescriptionTheLM3410constantcurrentLEDdriverisamonolithic,highfrequency,PWMDC/DCconverterin5-pinSOT23,6-pinLLP,&8-pineMSOPpackages.Withaminimumofexternalcom-ponentstheLM3410iseasytouse.Itcandrive2.8Atypicalpeakcurrentswithaninternal170mΩNMOSswitch.Switch-ingfrequencyisinternallysettoeither525kHzor1.60MHz,allowingtheuseofextremelysmallsurfacemountinductorsandchipcapacitors.Eventhoughtheoperatingfrequencyishigh,efficienciesupto88%areeasytoachieve.Externalshutdownisincluded,featuringanultra-lowstandbycurrentof80nA.TheLM3410utilizescurrent-modecontrolandin-ternalcompensationtoprovidehigh-performanceoverawiderangeofoperatingconditions.Additionalfeaturesincludedimming,cycle-by-cyclecurrentlimit,andthermalshutdown.Features■SpaceSavingSOT23-5&6-LLPPackage■Inputvoltagerangeof2.7Vto5.5V■Outputvoltagerangeof3Vto24V■2.8ATypicalSwitchCurrent■HighSwitchingFrequency—525KHz(LM3410-Y)—1.6MHz(LM3410-X)■170mΩNMOSSwitch■190mVInternalVoltageReference■InternalSoft-Start■Current-Mode,PWMOperation■ThermalShutdownApplications■LEDBacklightCurrentSource■LiIonBacklightOLED&HBLEDDriver■HandheldDevices■LEDFlashDriverTypicalBoostApplicationCircuit3003850130038502©2008NationalSemiconductorCorporation300385®525kHz/1.6MHz,ConstantCurrentBoostandSEPICLEDDriverwithInternalCompensationConnectionDiagramsTopView300385035–PinSOT23TopView300385046-PinLLPTopView300385058-PineMSOPOrderingInformationOrderNumberFrequencyPackageTypePackageDrawingSuppliedAsLM3410YMF525kHzSOT23-5MF05A1000unitsTape&ReelLM3410YMFX3000unitsTape&ReelLM3410YSDLLP-6SDE06A1000unitsTape&ReelLM3410YSDX4500unitsTape&ReelLM3410YMYeMSOP-8MUY08A1000unitsTape&ReelLM3410YMYX3500unitsTape&ReelLM3410XMF1.6MHzSOT23-5MF05A1000unitsTape&ReelLM3410XMFX3000unitsTape&ReelLM3410XSDLLP-6SDE06A1000unitstape&reelLM3410XSDX4500unitsTape&ReelLM3410XMYeMSOP-8MUY08A1000unitsTape&ReelLM3410XMYX3500unitsTape&Reel(Note1)IfMilitary/Aerospacespecifieddevicesarerequired,pleasecontacttheNationalSemiconductorSalesOffice/Distributorsforavailabilityandspecifications.VIN-0.5Vto7VSWVoltage-0.5Vto26.5VFBVoltage-0.5Vto3.0VDIMVoltage-0.5Vto7.0VESDSusceptibility(Note4)HumanBodyModel2kVJunctionTemperature(Note2)150°CStorageTemp.Range-65°Cto150°CSolderingInformationInfrared/ConvectionReflow(15sec)220°COperatingRatings(Note1)VIN2.7Vto5.5VVDIM(Note5)0VtoVINVSW3Vto24VJunctionTemperatureRange-40°Cto125°CPowerDissipation(Internal)SOT23-5400mWElectricalCharacteristicsLimitsinstandardtypeareforTJ=25°Conly;limitsinboldfacetypeapplyoverthejunctiontemperature(TJ)rangeof-40°Cto125°C.MinimumandMaximumlimitsareguaranteedthroughtest,design,orstatisticalcorrelation.TypicalvaluesrepresentthemostlikelyparametricnormatTJ=25°C,andareprovidedforreferencepurposesonly.VIN=5V,unlessotherwiseindicatedundertheConditionscolumn.SymbolParameterConditionsMinTypMaxUnitsVFBFeedbackVoltage178190202mVΔVFB/VINFeedbackVoltageLineRegulationVIN=2.7Vto5.5V-0.06-%/VIFBFeedbackInputBiasCurrent-0.11µAFSWSwitchingFrequencyLM3410-X120016002000kHzLM3410-Y360525680DMAXMaximumDutyCycleLM3410-X8892-%LM3410-Y9095-DMINMinimumDutyCycleLM3410-X-5-%LM3410-Y-2-RDS(ON)SwitchOnResistanceSOT23-5andeMSOP-8-170330mΩLLP-6190350ICLSwitchCurrentLimit2.12.80-AS