MP1584-r1.0

MP15843A,1.5MHz,28VStep-DownConverterMPSCONFIDENTIALANDPROPRIETARYINFORMATION–INTERNALUSEONLYMP1584Rev.1.0©2009MPS.AllRightsReserved.TheFutureofAnalogICTechnologyDESCRIPTIONTheMP1584isahighfrequencystep-downswitchingregulatorwithanintegratedinternalhigh-sidehighvoltagepowerMOSFET.Itprovides3Aoutputwithcurrentmodecontrolforfastloopresponseandeasycompensation.Thewide4.5Vto28Vinputrangeaccommodatesavarietyofstep-downapplications,includingthoseinanautomotiveinputenvironment.A100µAoperationalquiescentcurrentallowsuseinbattery-poweredapplications.Highpowerconversionefficiencyoverawideloadrangeisachievedbyscalingdowntheswitchingfrequencyatlightloadconditiontoreducetheswitchingandgatedrivinglosses.Thefrequencyfoldbackhelpspreventinductorcurrentrunawayduringstartupandthermalshutdownprovidesreliable,faulttolerantoperation.Byswitchingat1.5MHz,theMP1584isabletopreventEMI(ElectromagneticInterference)noiseproblems,suchasthosefoundinAMradioandADSLapplications.TheMP1584isavailableinathermallyenhancedSOIC8Epackage.FEATURES•Wide4.5Vto28VOperatingInputRange•Upto1.5MHzProgrammableSwitchingFrequency•High-EfficiencyPulseSkippingModeforLightLoad•CeramicCapacitorStable•InternalSoft-Start•InternallySetCurrentLimitwithoutaCurrentSensingResistor•AvailableinSOIC8EPackage.APPLICATIONS•HighVoltagePowerConversion•AutomotiveSystems•IndustrialPowerSystems•DistributedPowerSystems•BatteryPoweredSystems“MPS”and“TheFutureofAnalogICTechnology”areRegisteredTrademarksofMonolithicPowerSystems,Inc.TYPICALAPPLICATIONC4100nFD1VOUT3.3VVINVINENFREQGNDBSTSWFBCOMPMP1584EN6101,2548,937OUTPUTCURRENT(A)EFFICIENCY(%)00.10.20.30.40.50.60.70.80.910.010.1110VIN=12VVIN=24VEfficiencyCurve(fSW=500kHz)MP1584–3A,1.5MHz,28VSTEP-DOWNCONVERTERMPSCONFIDENTIALANDPROPRIETARYINFORMATION–INTERNALUSEONLYMP1584Rev.1.0©2009MPS.AllRightsReserved.ORDERINGINFORMATION*ForTape&Reel,addsuffix–Z(e.g.MP1584EN–Z);ForRoHSCompliantPackaging,addsuffix–LF.(e.g.MP1584EN–LF–Z)PACKAGEREFERENCESWENCOMPFBBSTVINFREQGND12348765TOPVIEWABSOLUTEMAXIMUMRATINGS(1)SupplyVoltage(VIN).....................–0.3Vto+30VSwitchVoltage(VSW)............–0.3VtoVIN+0.3VBSTtoSW.....................................–0.3Vto+6VAllOtherPins.................................–0.3Vto+6VContinuousPowerDissipation(TA=+25°C)(2).............................................................2.5WJunctionTemperature...............................150°CLeadTemperature....................................260°CStorageTemperature..............–65°Cto+150°CRecommendedOperatingConditions(3)SupplyVoltageVIN...........................4.5Vto28VOutputVoltageVOUT........................0.8Vto30VOperatingTemperature.............–20°Cto+85°CThermalResistance(4)θJAθJCSOIC8E..................................50......10...°C/WNotes:1)Exceedingtheseratingsmaydamagethedevice.2)ThemaximumallowablepowerdissipationisafunctionofthemaximumjunctiontemperatureTJ(MAX),thejunction-to-ambientthermalresistanceθJA,andtheambienttemperatureTA.ThemaximumallowablecontinuouspowerdissipationatanyambienttemperatureiscalculatedbyPD(MAX)=(TJ(MAX)-TA)/θJA.Exceedingthemaximumallowablepowerdissipationwillcauseexcessivedietemperature,andtheregulatorwillgointothermalshutdown.Internalthermalshutdowncircuitryprotectsthedevicefrompermanentdamage.3)Thedeviceisnotguaranteedtofunctionoutsideofitsoperatingconditions.4)MeasuredonJESD51-7,4-layerPCB.PartNumber*PackageTopMarkingTemperatureMP1584ENSOIC8EMP1584EN–20°Cto+85°CMP1584–3A,1.5MHz,28VSTEP-DOWNCONVERTERMPSCONFIDENTIALANDPROPRIETARYINFORMATION–INTERNALUSEONLYMP1584Rev.1.0©2009MPS.AllRightsReserved.ELECTRICALCHARACTERISTICSVIN=12V,VEN=2.5V,VCOMP=1.4V,TA=+25°C,unlessotherwisenoted.ParameterSymbolConditionMinTypMaxUnitsFeedbackVoltageVFB4.5VVIN28V0.7760.80.824VUpperSwitchOnResistanceRDS(ON)VBST–VSW=5V150mΩUpperSwitchLeakageVEN=0V,VSW=0V,VIN=28V1μACurrentLimit4.04.7ACOMPtoCurrentSenseTransconductanceGCS9A/VErrorAmpVoltageGain(5)200V/VErrorAmpTransconductanceICOMP=±3µA406080µA/VErrorAmpMinSourcecurrentVFB=0.7V5µAErrorAmpMinSinkcurrentVFB=0.9V–5µAVINUVLOThreshold2.73.03.3VVINUVLOHysteresis0.35VSoft-StartTime(5)0VVFB0.8V1.5msOscillatorFrequencyRFREQ=100kΩ1MHzShutdownSupplyCurrentVEN=0V1220µAQuiescentSupplyCurrentNoload,VFB=0.9V100125µAThermalShutdown150°CThermalShutdownHysteresis15°CMinimumOffTime(5)100nsMinimumOnTime(5)100nsENUpThreshold1.351.51.65VENHysteresis300mVNote:5)Guaranteedbydesign.MP1584–3A,1.5MHz,28VSTEP-DOWNCONVERTERMPSCONFIDENTIALANDPROPRIETARYINFORMATION–INTERNALUSEONLYMP1584Rev.1.0©2009MPS.AllRightsReserved.PINFUNCTIONSSOICPin#NameDescription1SWSwitchNode.Thisistheoutputfromthehigh-sideswitch.AlowforwarddropScho