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1、LinearLTC3880双输出多相降压电源解决方案关键词：电源管理,DC/DC转换器Linear公司的LTC3880/LTC3880-1是双输出多相DC/DC同步降压开关电源控制器，集成了基于I2C的PMBus兼容的串行接口，采用恒定频率电流模式架构.VIN输出电压从4.5V到24V,输出电压VOUT从0.5V到5.5V,输出电压对温度的变化为±0.5%.器件集成了15位ADC,主要用在大电流分布电源系统,通信,数据通信和存储器系统以及智能能效的电源系统•本文介绍了LTC3880/LTC3880-1主要特性，方框图，三相工作负载共享连接
2、图，电感DCR和电阻电流检测电路图，以及多种应用电路图.DualOutputPolyPhaseStep-DownDC/DCControllerwithDigitalPowerSystemManagementTheLTC3880/LTC3880-1aredual,PolyPhaseDC/DCsynchronousstep-downswitchingregulatorcontrollerswithanl2C-basedPMBuscompliantserialinterface・Thecontrollersuseaconstantfrequen
3、cy,currentmodearchitecture.Switchingfrequency,outputvoltage,anddeviceaddresscanbeprogrammedusingexternalconfigurationresistors.Additionally,parameterscanbesetviathedigitalinterfaceorstoredinEEPROM.Voltage,current,intemal/externaltemperatureandfaultstatuscanbereadbackthrou
4、ghthebusinterface.TheLTC3880/LTC3880-1canbeconfiguredforBurstModeoperation,discontinuous(pulse-skipping)modeorcontinuousinductorcurrentmode.TheLTC3880incorporatesa5VlinearregulatorwhiletheLTC3880-1usesanexternal5Vsupplyforminimumpowerloss.TheLTC3880/LTC3880-1areavailablei
5、na40-pin6mmx6mmQFNpackage.LTC3880/LTC3880-1主要特性：PMBus/l2CCompliantSerialInterlace一QueryVoltage,Currents,TemperatureandFaults一ProgrammableVoltage,CurrentLimit,DigitalSoft-Start/Stop,Sequencing,Margining,OV/UVandFrequencySynchronization(250kHzto1MHz)±0.5%OutputVoltageAccura
6、cyoverTemperatureIntegrated15-BitADCOptionalResistorProgrammableParametersInternalEEPROMandFaultLoggingIntegratedPowerfulN-ChannelMOSFETGateDriversPowerConversionWideVINRange:4.5Vto24VVOUTRange:0.5Vto5.5VAnalogCurrentModeControlLoopSupportsPower-UpIntoPre-BiasedLoadAccura
7、tePolyPhaseCurrentSharingforUpto6PhasesAvailableina40-Pin(6mmx6mm)QFNPackageLTC3880/LTC3880-1应用：HighCurrentDistributedPowerSystemsTelecom,DatacomandStorageSystemsIntelligentEnergyEfficientPowerRegulation丫1心g5.3VSWEG5VFKLTC3M0OHIY赶Wen4HJ-ICC6TOVCO33沁]kVscitsro一Mg古VSTBT1.2T
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