Linear LTM4628双路8A DC-DC稳压电源方案

分享到:

  Linear公司的LTM4628是双路8A 或单路DC/DC μModule稳压器,包括有开关控制器,功率FET,电感以及所有的支持元件.输入电压从4.5V到 26.5V,两输出的电压从0.6V 到 5.5V,由外接电阻设定,直流输出总误差为±1.5%,主要用在通信和网络设备,存储和ATCA卡以及工业设备.本文介绍了LTM4628主要特性, 简化方框图以及各种应用电路图.

  LTM4628: Dual 8A or Single 16A DC/DC μModule Regulator

  The LTM4628 is a complete dual 8A output switching mode DC/DC power supply and can be easily configured to provide a single 2-phase 16A output. Included in the package are the switching controller, power FETs, inductor, and all supporting components. Operating from an input voltage range of 4.5V to 26.5V, the LTM4628 supports two outputs each with an output voltage range of 0.6V to 5.5V, set by a single external resistor. Its high efficiency design delivers 8A continuous current for each output. Only a few input and output capacitors are needed.

  The device supports frequency synchronization, multiphase operation, Burst Mode operation and output voltage tracking for supply rail sequencing. It has an onboard temperature diode for device temperature monitoring.

  High switching frequency and a current mode architecture enable a very fast transient response to line and load changes without sacrificing stability.

  Fault protection features include overvoltage and overcurrent protection. The power module is offered in a space saving and thermally enhanced 15mm × 15mm × 4.32mm LGA package. The LTM4628 is PB-free and ROHS compliant.

  LTM4628主要特性:

  Complete Standalone Dual Power Supply

  Single 16A or Dual 8A Output

  Wide Input Voltage Range: 4.5V to 26.5V

  Output Voltage Range: 0.6V to 5.5V

  ±1.5% Total DC Output Error

  Differential Remote Sense Amplifier

  Current Mode Control/Fast Transient Response

  Adjustable Switching Frequency

  Overcurrent Foldback Protection

  Multiphase Parallel Current Sharing with Multiple LTM4628s

  Frequency Synchronization

  Internal Temperature Sensing Diode Output

  Selectable Burst Mode Operation

  Soft-Start/Voltage Tracking

  Output Overvoltage Protection

  Low Profile (15mm × 15mm × 4.32mm) LGA Package

  LTM4628应用:

  Telecom and Networking Equipment

  Storage and ATCA Cards

  Industrial Equipment

图1.LTM4628简化方框图

  TYPICAL APPLICATION

图2.LTM4628双路8A,1.2V和1.5V输出DC/DC稳压器电路图

图3.LTM4628四相并联配置框图

图4.LTM4628输出跟踪的应用电路图

图5.LTM4628应用电路图:7V-16V输入,1.5V和1.2V输出

图6.LTM4628应用电路图:1.0V和1.2V输出跟踪

图7.LTM4628应用电路图:四相1.2V/32A输出

  详情请见: