原标题：Linear LTM4650-150A降压电源模块μModuleR解决方案

　　Linear公司的LTM4650-1是双路25A或单路50A降压电源μModuleR稳压模块,DC输出总误差±0.8% (LTM4650-1A)和±1.5% (LTM4650-1B).μModuleR稳压模块封装内包括开关控制器,功率FET,电感和所有的支持元件.输入电压4.5V-15V,输出电压0.6V-1.8V,主要用在FPGA,ASIC,微处理器核电压稳压以及信息和通信系统.本文介绍了LTMR4650-1A/LTM4650-1B主要特性,框图,多种应用电路,以及演示板DC2378A-B主要特性,电路图和材料清单.

　　The LTMR4650-1A/LTM4650-1B is dual 25A or single 50Aoutput step-down μModuleR (power module) regulatorwith ±0.8% (LTM4650-1A) and ±1.5% (LTM4650-1B)total DC output error with ±3% transient output error.Included in the package are the switching controller,power FETs, inductors, and all supporting components.

　　External compensation allows for fast transient responseto minimize output capacitance when powering FPGAs,ASICs, and processors. With synchronized multiphaseparallel current sharing, six LTM4650-1 devices can deliverup to 300A. The LTM4650-1 is offered in a 16mm ×16mm × 5.01 BGA package, with SnPb (BGA) or RoHScompliant terminal finish.

　　LTMR4650-1A/LTM4650-1B主要特性:

　　±0.8% Maximum Total DC Output Error Over Lineand Load (LTM4650-1A)

　　±3% Transient Output Error with MinimumOutput Capacitance

　　Dual 25A or Single 50A Output

　　4.5V to 15V Input, 0.6V to 1.8V Output Voltage Range

　　Differential Remote Sense Amplifier

　　Current Mode Control/Fast Transient Response

　　Current Sharing Up to 300A

　　16mm × 16mm × 5.01mm BGA Package

　　LTMR4650-1A/LTM4650-1B应用:

　　FPGA, ASIC, μProcessor Core Voltage Regulation

　　Information, Communication Systems

　　图1.LTMR4650-1简化框图

　　图2.LTM4650-1输出跟踪应用电路图

　　图3.LTM4650-1应用电路图:4.5V-15V输入,1.5V和1.2V 25A输出

　　图4.LTM4650-1应用电路图:2相1V 50A

　　图5.LTM4650-1应用电路图:1.2V和1V输出跟踪

　　图6.LTM4650-1应用电路图:4相1.2V 100A

　　演示板DC2378A-B

　　Demonstration circuit DC2378A-B features the LTM4650EY-1, the high efficiency, high density, dual 25A, single 50A, switch mode step-down power module regulator. The input voltage is from 4.5V to 15V. The output voltage is programmable from 0.6V to 1.8V. DC2378A-B can deliver 25A maximum current from each channel. As explained in the data sheet, output current derating is necessary for certain VIN , VOUT , and thermal conditions.

　　The board operates in continuous conduction mode in heavy load conditions. For high efficiency at low load currents, the MODE jumper (JP1) selects pulse-skipping mode for noise sensitive applications or Burst Mode ® operation in less noise sensitive applications. Two outputs can be connected in parallel for a single 50A output solution with optional jumper resistors. The board allows the user to program how its output ramps up and down through the TRACK/SS pin. The output can be set up to either coincidentally or ratiometrically track with another supply’s output. Remote output voltage sensing is available for improved output voltage regulation at the load point. These features and the availability of the LTM4650EY-1 in a compact 15mm × 15mm × 5.01mm BGA package make it ideal for use in many high density point-of-load regulation applications. The LTM4650-1 data sheet must be read in conjunction with this demo manual for working on or modifying the demo circuit DC2378A-B.

　　图7.演示板DC2378A-B外形图

　　演示板DC2378A-B材料清单:

　　详情请见:

46501fb.pdf

DC2378ABF.pdf