【MP1583】1.22V反馈电压、3A负载单片集成DC-DC******转换芯片，MP1583工作电压为（4.75V～23V），操作频率高达385KHz，使得可选取比较小的电感电容与之配合即达到小的纹波输出；MP1583具有外围元件少，可以连续输出电流达到3A，具有过温/过流和短路保护。另外通过对反馈电阻的调整，MP1583输出电压可任意调节，还有可通过一个外部电阻调整过流保护点，输出短路时可自动也降低操作频率使输出功率变小；MP1583可广泛用于各种设备的电池电压转换和电源变换电路，如便携DVD,LCD，车载电器，路由器,数码相框,***，网络交换机等。MP1583引脚定义1.MP1583-BS：High-SideGateDriveBoostInput.BSsuppliesthedriveforthehigh-sideN-ChannelMOSFETswitch.Connecta10nForgreatercapacitorfromSWtoBStopowerthehighsideswitch.；2.MP1583-IN：PowerInput.INsuppliesthepowertotheIC,aswellasthestep-downconverterswitches.DriveINwitha6Vto28Vpowersource.BypassINtoGNDwithasuitablylargecapacitortoeliminatenoiseontheinputtotheIC；3.MP1583-SW：PowerSwitchingOutput.SWistheswitchingnodethatsuppliespowertotheoutput.ConnecttheoutputLCfilterfromSWtotheoutputload.NotethatacapacitorisrequiredfromSWtoBS；topowerthehigh-sideswitch.4.MP1583-Ground.(Note:ConnecttheexposedpadonbacksidetoPin4).；5.MP1583-FB：FeedbackInput.FBsensestheoutputvoltagetoregulatethatvoltage.DriveFBwitharesistivevoltagedividerfromtheoutputvoltage.Thefeedbackthresholdis1.222V；6.MP1583-COMP：CompensationNode.COMPisusedtocompensatetheregulationcontrolloop.ConnectaseriesRCnetworkfromCOMPtoGNDtocompensatetheregulationcontrolloop.Insomecases,anadditionalcapacitorfromCOMPtoGNDisrequired.7.MP1583-EN：EnableInput.ENisadigitalinputthatturnstheregulatoronoroff.DriveENhightoturnontheregulator,driveENlowtoturnitoff.AnUnderVoltageLockout(UVLO)functioncanbeimplementedbytheadditionofaresistordividerfromVINtoGND.Forcompletelowcurrentshutdownitsneedstobelessthan0.7V.Forautomaticstartup,le***eENunconnected8.MP1583-SS：Soft-StartControlInput.SScontrolsthesoft-startperiod.ConnectacapacitorfromSStoGNDtosetthesoft-startperiod.A0.1μFcapacitorsetsthesoft-startperiodto10ms.Todisablethesoft-startfeature,le***eSSunconnected.)