MP2303中文资料

MP23033A,28V,340KHzSynchronousRectifiedStep-DownConverterINITIALRELEASE–SPECIFICATIONSSUBJECTTOCHANGEMP2303Rev.0.91©2006MPS.AllRightsReserved.TheFutureofAnalogICTechnologyTMTMDESCRIPTIONTheMP2303isamonolithicsynchronousbuckregulator.Thedeviceintegrates120mΩMOSFETSthatprovide3Acontinuousloadcurrentoverawideoperatinginputvoltageof4.75Vto28V.Currentmodecontrolprovidesfasttransientresponseandcycle-by-cyclecurrentlimit.Anadjustablesoft-startpreventsinrushcurrentatturn-on.Inshutdownmode,thesupplycurrentdropsto1µA.Thisdevice,availableinan8-pinSOICpackage,providesaverycompactsystemsolutionwithminimalrelianceonexternalcomponents.EVALUATIONBOARDREFERENCEBoardNumberDimensionsEV2303DN-00A2.0”Xx1.5”Yx0.5”ZFEATURES•3AOutputCurrent•Wide4.75Vto28VOperatingInputRange•Integrated120mΩPowerMOSFETSwitches•OutputAdjustablefrom0.8Vto25V•Upto95%Efficiency•ProgrammableSoft-Start•StablewithLowESRCeramicOutputCapacitors•Fixed340KHzFrequency•Cycle-by-CycleOverCurrentProtection•InputUnderVoltageLockout•ThermallyEnhanced8-PinSOICPackageAPPLICATIONS•DistributedPowerSystems•Pre-RegulatorforLinearRegulators•NotebookComputers“MPS”and“TheFutureofAnalogICTechnology”areTrademarksofMonolithicPowerSystems,Inc.TYPICALAPPLICATIONVIN4.75V-28VVOUT5V/3AC510nFC33.3nFMP2303BSSSENCOMPFBINSWGND34876512MP2303_TAC01C6(optional)1009080706050EFFICIENCY(%)00.51.01.52.02.53.0LOADCURRENT(A)MP2303-EC01EfficiencyvsLoadCurrentVIN=12VVIN=24VVOUT=5VMP2303–3A,28V,340KHzSYNCHRONOUSRECTIFIED,STEP-DOWNCONVERTERINITIALRELEASE–SPECIFICATIONSSUBJECTTOCHANGEMP2303Rev.0.91©2006MPS.AllRightsReserved.TMPACKAGEREFERENCEPartNumber*PackageTemperatureMP2303DNSOIC8N(ExposedPad)–40°Cto+85°C*ForTape&Reel,addsuffix–Z(eg.MP2303DN–Z)ForLeadFree,addsuffix–LF(eg.MP2303DN–LF–Z)ABSOLUTEMAXIMUMRATINGS(1)SupplyVoltageVIN.......................–0.3Vto+30VSwitchVoltageVSW.................–1VtoVIN+0.3VBoostVoltageVBS..........VSW–0.3VtoVSW+6VAllOtherPins.................................–0.3Vto+6VJunctionTemperature...............................150°CLeadTemperature....................................260°CStorageTemperature.............–65°Cto+150°CRecommendedOperatingConditions(2)InputVoltageVIN............................4.75Vto28VOutputVoltageVOUT........................0.8Vto25VAmbientOperatingTemperature...–40°Cto+85°CThermalResistance(3)θJAθJCSOIC8N..................................50......10...°C/WNotes:1)Exceedingtheseratingsmaydamagethedevice.2)Thedeviceisnotguaranteedtofunctionoutsideofitsoperatingconditions.3)Measuredonapproximately1”squareof1ozcopper.ELECTRICALCHARACTERISTICS(4)VIN=12V,TA=+25°C,unlessotherwisenoted.ParameterSymbolConditionMinTyp(4)MaxUnitsShutdownSupplyCurrentVEN=0V0.33.0µASupplyCurrentVEN=2.7V,VFB=1.0V1.31.5mA4.75V≤VIN≤28V,TA=+25°C0.7800.8000.820VFeedbackVoltageVFB–40°C≤TA≤+85°C0.7720.828VOVPThresholdVoltage0.900.951.00VErrorAmplifierVoltageGainAEA400V/VErrorAmplifierTransconductanceGEA∆IC=±10µA5508201100µA/VHigh-SideSwitch-OnResistanceRDS(ON)1120mΩLow-SideSwitch-OnResistanceRDS(ON)2120mΩHigh-SideSwitchLeakageCurrentVEN=0V,VSW=0V010µAUpper-SwitchCurrentLimit4.36.3ALower-SwitchCurrentLimitFromDraintoSource1.25ACOMPtoCurrentSenseTransconductanceGCS9A/VTA=+25°C300340380KHzOscillationFrequencyFosc1–40°C≤TA≤+85°C270400KHzShortCircuitOscillationFrequencyFosc2VFB=0V110KHzMaximumDutyCycleDMAXVFB=0.7V90%MinimumOn-Time220nsENShutdownThresholdVoltageVENRising1.11.52.0VBSINSWGNDSSENCOMPFB12348765TOPVIEWMP2303_PD01_SOIC8NMP2303–3A,28V,340KHzSYNCHRONOUSRECTIFIED,STEP-DOWNCONVERTERINITIALRELEASE–SPECIFICATIONSSUBJECTTOCHANGEMP2303Rev.0.91©2006MPS.AllRightsReserved.TMELECTRICALCHARACTERISTICS(4)(continued)VIN=12V,TA=+25°C,unlessotherwisenoted.ParameterSymbolConditionMinTyp(4)MaxUnitsENShutdownThresholdVoltageHysteresis220mV2.22.52.7VENLockoutThresholdVoltage–40°C≤TA≤+85°C2.12.8VENLockoutHysteresis210mVVINrising,TA=+25°C3.84.054.30VInputUnderVoltageLockoutThresholdUVLO–40°C≤TA≤+85°C3.54.70VInputUnderVoltageLockoutThresholdHysterisis210mVSoft-StartCurrentVSS=0V6µAThermalShutdown160°CNote:4)100%productiontestat+25°C.Specificationsoverthetemperaturerangeareguaranteedbydesignandcharacterization.PINFUNCTIONSPin#NameDescription1BSHigh-SideGateDriveBoostInput.BSsuppliesthedriveforthehigh-sideN-ChannelMOSFETswitch.Connecta0.01µForgreatercapacitorfromSWtoBStopowerthehighsideswitch.2INPowerInput.INsuppliesthepowertotheIC,aswellasthestep-downconverterswitches.DriveINwitha4.75Vto28Vpowersource.BypassINtoGNDwithasuitablylargecapacitortoeliminatenoiseontheinputtotheIC.SeeInputCapacitor.3SWPowerSwitchingOutput.SWistheswitchingnodethatsuppliespowertotheoutput.ConnecttheoutputLCfilterfromSWtotheoutputload.NotethatacapacitorisrequiredfromSWtoBStopowerthehigh-sideswitch.4GNDGround(ConnectExpos