LinearLTM462715A高效DC-DC电源解决方案

LinearLTM462715A高效DC-DC电源解决方案关键词：电源管理,DC/DC转换器,开关电源Linear公司的LTM4627是输出电流15A的高效DC/DC转换器,输入电压从4.5V到20V,输出电压从0.6V到5V,并行电流输出电流可达60A,效率高达93%.主要用在通信服务器和网络设备,ATCA和存储卡,工业设备以及医疗系统.本文介绍了LTM4627主要特性,简化方框图,以及多种应用电路.TheLTMR4627isacomplete15AoutputhighefficiencyswitchmodeDC/DCpowersupply.Includedinthepackagearetheswitchingcontroller,powerFETs,inductorandcompensationcomponents.Operatingoveraninputvoltagerangefrom4.5Vto20V,theLTM4627supportsanoutputvoltagerangeof0.6Vto5V,setbyasingleexternalresistor.Onlyafewinputandoutputcapacitorsareneeded.CurrentmodeoperationallowsprecisioncurrentsharingofuptofourLTM4627regulatorstoobtain60Aoutput.Highswitchingfrequencyandacurrentmodearchitectureenableaveryfasttransientresponsetolineandloadchangeswithoutsacrificingstability.Thedevicesupportsfrequencysynchronization,multiphase/currentsharingoperation,BurstModeoperationandoutputvoltagetrackingforsupplyrailsequencing.4.32mmLGApackage.TheLTM4627isPB-freeandRoHScompliant.TheLTM4627isofferedinathermallyenhanced15mmx15mmxLTM4627主要特性:Complete15ASwitchModePowerSupplyWideInputVoltageRange:4.5Vto20V0.6Vto5VOutputRange±1.5%TotalDCOutputError(–40℃to125℃)DifferentialRemoteSenseAmplifierforPrecisionRegulationCurrentModeControl/FastTransientResponseFrequencySynchronizationParallelCurrentSharing(Upto60A)SelectablePulse-SkippingorBurstModeROperationSoft-Start/VoltageTrackingUpto93%Efficiency(12VIN,3.3VOUT)OvercurrentFoldbackProtectionOutputOvervoltageProtection4.32mmLGAPackage15mmxSmallSurfaceMountFootprint,LowProfile15mmxLTM4627应用:TelecomServersandNetworkingEquipmentATCAandStorageCardsIndustrialEquipmentMedicalSystems图1.LTM4627简化方框图图2.LTM4627外形图图3.LTM46271.2V/15ADC/DC稳压器电路图图4.LTM4627带跟踪的双输出(1.2V和1.5V)稳压器电路图图5.LTM46274.5V-20V输入1.5V/15A输出电路图AO-Electronics傲壹电子官网：中文网：双路平行输出电路图图7.LTM46271.2V/60A共享电流4相稳压器电路图