DCDC电源芯片MP2565DN

MP25652.5A,4MHz,50VStep-DownConverterMP2565Rev.0.91©2011MPS.AllRightsReserved.TheFutureofAnalogICTechnologyDESCRIPTIONTheMP2565isahighfrequencystep-downswitchingregulatorwithanintegratedinternalhigh-sidehighvoltagepowerMOSFET.Itprovides2.5Aoutputwithcurrentmodecontrolforfastloopresponseandeasycompensation.Thewide4.5Vto50Vinputrangeaccommodatesavarietyofstep-downapplications,includingthoseinanautomotiveinputenvironment.A12µAshutdownmodesupplycurrentallowsuseinbattery-poweredapplications.Highpowerconversionefficiencyoverawideloadrangeisachievedbyscalingdowntheswitchingfrequencyatlightloadconditiontoreducetheswitchingandgatedrivinglosses.Thefrequencyfoldbackhelpspreventinductorcurrentrunawayduringstartupandthermalshutdownprovidesreliable,faulttolerantoperation.Byswitchingat4MHz,theMP2565isabletopreventEMI(ElectromagneticInterference)noiseproblems,suchasthosefoundinAMradioandADSLapplications.TheMP2565isavailableinsmall3mmx3mmQFN10andthermallyenhancedSOIC8packages.FEATURES•120µAQuiescentCurrent•Wide4.5Vto50VOperatingInputRange•220mΩInternalPowerMOSFET•Upto4MHzProgrammableSwitchingFrequency•High-Efficiency,Light-Loadoperation•StablewithCeramicCapacitor•InternalSoft-Start•InternallySetCurrentLimitwithoutexternalCurrentSensingResistor•Upto95%Efficiency•OutputAdjustablefrom0.8Vto47V•Availablein3x3QFN10andThermallyEnhancedSOIC8PackagesAPPLICATIONS•HighVoltagePowerConversion•AutomotiveSystems•IndustrialPowerSystems•DistributedPowerSystems•BatteryPoweredSystems“MPS”and“TheFutureofAnalogICTechnology”areRegisteredTrademarksofMonolithicPowerSystems,Inc.TYPICALAPPLICATIONC110uFC3220pFC6NSR2R1L1C4100nFC222uFD1VOUT3.3VVINVINENFREQGNDBSTSWFBCOMPMP2565ENR5R4R3R66101,2548,93700.511.522.5IOUT(A)EFFICIENCY(%)405060708090100Efficiency@VOUT=3.3Vfs=500kHzVIN=24VVIN=50VVIN=8VVIN=12VVIN=36VMP2565–2.5A,4MHz,50VSTEP-DOWNCONVERTERMP2565Rev.0.91©2011MPS.AllRightsReserved.ORDERINGINFORMATIONForTape&Reel,addsuffix–Z(eg.MP2565DQ–Z);ForRoHSCompliantPackaging,addsuffix–LF;(eg.MP2565DQ–LF–Z)ForTape&Reel,addsuffix–Z(eg.MP2565DN–Z);ForRoHSCompliantPackaging,addsuffix–LF;(eg.MP2565DN–LF–Z)PACKAGEREFERENCETOPVIEWSWSWENCOMPFB12345BSTVINVINFREQGND109876EXPOSEDPADONBACKSIDECONNECTTOGNDSWENCOMPFBBSTVINFREQGND12348765TOPVIEWEXPOSEDPADCONNECTTOGNDABSOLUTEMAXIMUMRATINGS(1)SupplyVoltage(VIN).....................–0.3Vto+55VSwitchVoltage(VSW)...........................................……………..–0.3V(-9Vfor10ns)toVIN+0.3VBSTtoSW.....................................–0.3Vto+6VAllOtherPins.................................–0.3Vto+6VContinuousPowerDissipation(TA=+25°C)(2)3x3QFN10……………………………………2.5WSOIC8………………………………………...2.5WJunctionTemperature...............................150°CLeadTemperature....................................260°CStorageTemperature..............–65°Cto+150°CRecommendedOperatingConditions(3)SupplyVoltageVIN...........................4.5Vto50VOutputVoltageVOUT.........................0.8Vto47VOperatingTemperature.............–40°Cto+85°CThermalResistance(4)θJAθJC3x3QFN10..............................50......12...°C/WSOIC8(ExposedPad)............50......10...°C/WNotes:1)Exceedingtheseratingsmaydamagethedevice2)ThemaximumallowablepowerdissipationisafunctionofthemaximumjunctiontemperatureTJ(MAX),thejunction-to-ambientthermalresistanceθJA,andtheambienttemperatureTA.ThemaximumallowablecontinuouspowerdissipationatanyambienttemperatureiscalculatedbyPD(MAX)=(TJ(MAX)-TA)/θJA.Exceedingthemaximumallowablepowerdissipationwillcauseexcessivedietemperature,andtheregulatorwillgointothermalshutdown.Internalthermalshutdowncircuitryprotectsthedevicefrompermanentdamage..3)Thedeviceisnotguaranteedtofunctionoutsideofitsoperatingconditions.4)MeasuredonJESD51-74-layerboard.PartNumber*PackageTopMarketingTemperatureMP2565DQ3x3QFN108D–40°Cto+85°CMP2565DNSOIC8EMP2565DNMP2565–2.5A,4MHz,50VSTEP-DOWNCONVERTERMP2565Rev.0.91©2011MPS.AllRightsReserved.ELECTRICALCHARACTERISTICSVIN=12V,VEN=2.5V,VCOMP=1.4V,TA=+25°C,unlessotherwisenoted.ParameterSymbolConditionMinTypMaxUnitsFeedbackVoltageVFB4.5VVIN50V0.7760.80.824VUpperSwitchOnResistanceRDS(ON)VBST–VSW=5V220mΩUpperSwitchLeakageVEN=0V,VSW=0V,VIN=50V1µACurrentLimitDutyCycle=50%2.93.5ACOMPtoCurrentSenseTransconductanceGCS7.3A/VErrorAmpVoltageGain200V/VErrorAmpTransconductanceICOMP=±3µA406080µA/VErrorAmpMinSourcecurrentVFB=0.7V5µAErrorAmpMinSinkcurrentVFB=0.9V–5µAVINUVLOThreshold2.73.03.3VVINUVLOHysteresis0.4VSoft-StartTime10%VOUT90%1.3(5)msOscillatorFrequencyRFREQ=45kΩ1.622.4MHzRFREQ=18kΩ3.244.8MHzShutdownSupplyCurrentVEN=0V1220µAQuiescentSupplyCurrentNoload,VFB=0.9V120145µAThermalShutdown150°CThermalShutdownHysteresis15°CMinimumOffTime(6)100nsMinimumOnTime(6)100nsENUpThreshold1.31.51.7VENThresholdHysteresis300mVNotes:5)TheSo