FP6716-升压方案

1FP6716-Preliminary0.1-MAY-2013FP671685Tfitipowerintegratedtechnologylnc.5V,8A,550KHzHighEfficiencyLowRippleSynchronousStep-UpConverterPinAssignmentsSPPackage(SOP-8ExposedPad)PGOUTILIMENGND23465781VINFBLX9PGNDFigure1.PinAssignmentofFP6716OrderingInformationDescriptionTheFP6716isahighefficiency,fixedfrequency550KHz,currentmodePWMboostDC/DCconverterwhichcouldoperatebatterysuchasinputvoltagedownto2.5V.Theconverteroutputvoltagecanbeadjustedtoamaximumof5.25Vbyanexternalresistordivider.Besidestheconverterincludesa0.05ΩN-channelMOSFETswitchand0.08ΩP-channelsynchronousrectifier.SonoexternalSchottkydiodeisrequiredandcouldgetbetterefficiencynear90%.Theconverterisbasedonafixedfrequency,currentmode,pulse-width-modulationPWMcontrollerthatgoesautomaticallyintoPSMmodeatlightload.Whenconverteroperationintodiscontinuousmode,theinternalanti-ringingswitchwillreduceinterferenceandradiatedelectromagneticenergy.TheFP6716isavailableinaspace-savingSOP-8(ExposedPad)packageforportableapplication.FeaturesHighEfficiencyupto90%LowRDS(ON)IntegratedPowerMOSFETNMOS50mΩ/PMOS60mΩWideInputVoltageRange:2.5Vto5.25VFixed550KHzSwitchingFrequencyLow-PowerModeforLightLoadConditions±2.0%VoltageReferenceAccuracyAdjustableCurrentLimitPMOSCurrentLimitforShortCircuitProtectionLowQuiescentCurrentOutputRippleunder200mV(ScopeFullBandwidth)InputUnderVoltageLockoutInternalCompensationFunctionBuilt-InSoftStartFunctionOver-TemperatureProtectionwithAutoRecoveryOutputOvervoltageProtectionSOP-8(ExposedPad)Pb-FreePackageApplicationsPortablePowerBankWirelessEquipmentHandheldInstrumentGPSReceiverC:GreenTR:Tape/ReelFP6716□□□PackageTypeSP:SOP-8(ExposedPad)2FP6716-Preliminary0.1-MAY-2013FP671685Tfitipowerintegratedtechnologylnc.TypicalApplicationCircuitVOUTFP6716VINENILIMOUTFBPGL14.7μHC122μFC322μFR1525KR2100K156283VIN5V/3A2.5Vto5.5VOFFONC20.1μFC40.1μFLXGND74RILIMD1PGND9Figure2.TypicalApplicationCircuitILIMResistanceValue(MΩ)TypicalInputLimits(A)0.5814224180.5FunctionalPinDescriptionPinNamePinNo.PinFunctionVIN1PowerSupplyInputPin.OUT2OutputoftheSynchronousRectifier.FB3VoltageFeedbackInputPin.GND4GroundPin.ConnectGNDtoexposedpad.ILIM5ProgrammingInputforAverageInputCurrent.EN6LogicControlledShutdownInput.LX7PowerSwitchingConnection.ConnectLXtotheinductorandoutputrectifier.PG8PowerGoodIndicationOpenDrainPin.PGND9PowerGroundPin.R4C8X23FP6716-Preliminary0.1-MAY-2013FP671685Tfitipowerintegratedtechnologylnc.BlockDiagramOUTFBPWMControlLogicOSCPFMControlIsense/CurrentLimitRampGeneratorCOMPBody-DiodeSwitchBandgapReferenceErrorAmpAnti-ReverseComparatorNMOSGNDANTI-RINGPMOSOn/OffControlENVINLXUVLOVINGMILIMPGFigure3.BlockDiagramofFP67164FP6716-Preliminary0.1-MAY-2013FP671685Tfitipowerintegratedtechnologylnc.AbsoluteMaximumRatings(Note1)●SupplyVoltageVIN------------------------------------------------------------------------------------------------0.3Vto+6.5V●LXVoltageVLX-----------------------------------------------------------------------------------------------------0.3Vto+6.5V●AllOtherPinsVoltage--------------------------------------------------------------------------------------------0.3Vto+6.5V●MaximumJunctionTemperature(TJ)------------------------------------------------------------------------+150°C●StorageTemperature(TS)---------------------------------------------------------------------------------------65°Cto+150°C●LeadTemperature(Soldering,10sec.)---------------------------------------------------------------------+260°C●PackageThermalResistance,(θJA)SOP-8(ExposedPad)------------------------------------------------------------------------------60°C/W●PackageThermalResistance,(θJC)SOP-8(ExposedPad)------------------------------------------------------------------------------15°C/WNote1：Stressesbeyondthislistedunder“AbsoluteMaximumRatingsmaycausepermanentdamagetothedevice.RecommendedOperatingConditions●SupplyVoltageVIN-----------------------------------------------------------------------------------------------+2.5Vto+5.25V●OutputVoltageRange-------------------------------------------------------------------------------------------upto+5.25V●OperationTemperatureRange---------------------------------------------------------------------------------40°Cto+85°C5FP6716-Preliminary0.1-MAY-2013FP671685Tfitipowerintegratedtechnologylnc.ElectricalCharacteristics(VIN=3.3V,TA=25°C,unlessotherwisespecified.)ParameterSymbolConditionsMinTypMaxUnitVINInputSupplyVoltageVIN2.55.25VVINSupplyCurrent(Switching)VIN=3.3V,VFB=0.7VMeasureVIN300500μAVINSupplyCurrent(Nowitching)VFB=1V30μAFeedbackVoltageVFB2.5V≦VIN≦5.5V0.7840.80.816VHigh-SidePMOSFETRDS(ON)60mΩLow-SideNMOSFETRDS(ON)50mΩHigh-SideMOSFETLeakageCurrentILX(leak)VLX=5.5V,VOUT=0V10μALow-SideMOSFETLeakageCurrentVLX=5.5V10μAOscillationFrequencyFOSC450550650KHzShortCircuitTripPointMonitoredFBvoltage0.3VShortCircuitCurrentLimitVIN=3.3V50mAMaximumDutyCycleDMAXVIN=3.3V90%ILIMCurrent8ARILIM=500K8AILIMCurrentGainVIN=3.3V8MΩ-A/ALineRegulationVIN=2.5Vto5.5V,IOUT=100mA1%LoadRegulationIOUT=0Ato1A0.5%InputUVLOThresholdVUVLO(VTH)