深圳市百盛电子PS7516郑生18948314942.DescriptionFeaturesThePS7516isahighefficiency,fixedfrequencyHighHighEfficiencyEfficiencyupuptoto96%96%(WhenVin=4.2V)1MHz,currentmodePWMboostDC/DCconverterLowRDS(ON)IntegratedPowerMOSFETwhichcouldoperatebatterysuchasinputvoltageNMOS80mΩ/PMOS120mΩdownto2.5V.TheconverteroutputvoltagecanbeWideInputVoltageRange:2.5Vto5.5Vadjustedtoamaximumof5.25VbyanexternalFixed1MHzSwitchingFrequencyresistordivider.BesidestheconverterincludesaLow-PowerModeforLightLoadConditions0.08ΩN-channelMOSFETswitchand0.12Ω±2.0%VoltageReferenceAccuracyP-channelsynchronousrectifier.SonoexternalPMOSCurrentLimitforShortCircuitProtectionSchottkydiodeisrequiredandcouldgetbetterLowQuiescentCurrentefficiencynear93%.OutputRippleunder200mV.(ScopeFullBandwidth)Theconverterisbasedonafixedfrequency,currentFastTransientResponsemode,pulse-width-modulationPWMcontrollerthatBuilt-InSoftStartFunctiongoesautomaticallyintoPSMmodeatlightload.Over-TemperatureProtectionwithAutoRecoveryOutputOvervoltageProtectionWhenconverteroperationintodiscontinuousmode,Space-SavingSOT-23-6Packagetheinternalanti-ringingswitchwillreduceinterferenceandradiatedelectromagneticenergy.ApplicationsThePS7516isavailableinaspace-savingSOT-23-6PortablePowerBankpackageforportableapplication.WirelessEquipmentHandheldInstrumentGPSReceiverPinAssignmentsSOT23-6-INOUTEN654123LXGNDFBFigure1.PinAssignmentofPS7516FunctionalPinDescriptionPinNamePinNo.PinFunctionLX1PowerSwitchingConnection.ConnectLXtotheinductorandoutputrectifier.GND2GroundPin.FB3VoltageFeedbackInputPin.EN4LogicControlledShutdownInput.OUT5OutputoftheSynchronousRectifier.ININ6PowerSupplyInputPin.1PS7516.85TBlockDiagramVINLXPMOSOUTANTI-RINGOn/OffENControlNMOSBody-DiodeSwitchAnti-ReverseIsense/CurrentLimitComparatorPFMSlopeComp.ControlPWMOSCControlLogicOVPCOMPFBErrorAmpBandgapUVLOOTPReferenceVIN85TGNDFigure3.BlockDiagramofPS75162PS7516