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开关模式稳压器、5V至±12或±15V双输出

产品详情

主要特征

应用/用途

简化框图

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主要特征

  • Specs Guaranteed for In-Circuit Performance
  • Load Currents to ±2A
  • 4.2V to 10V Input-Voltage Range
  • Switches From ±15V to ±12V Under Logic Control
  • ±4% Output Tolerance Max Over Temp, Line, and Load
  • 90% Typ Efficiency
  • Low-Noise, Current-Mode Feedback
  • Cycle-by-Cycle Current Limiting
  • Undervoltage Lockout and Soft-Start
  • 100kHz or 200kHz Operation

应用/用途

  • 计算机外设
  • 替代DC-DC转换器模块
  • 分布式供电系统

描述

The MAX742 DC-DC converter is a controller for dual-output power supplies in the 3W to 60W range. Relying on simple two-terminal inductors rather than transformers, the MAX742 regulates both outputs independently to within ±4% over all conditions of line voltage, temperature, and load current.

The MAX742 has high efficiency (up to 92%) over a wide range of output loading. Two independent PWM current-mode feedback loops provide tight regulation and operation free from subharmonic noise. The MAX742 can operate at 100kHz or 200kHz, so it can be used with small and lightweight external components. Also ripple and noise are easy to filter. The MAX742 provides a regulated output for inputs ranging from 4.2V to 10V (and higher with additional components).

External power MOSFETs driven directly from the MAX742 are protected by cycle-by-cycle overcurrent sensing. The MAX742 also features undervoltage lockout, thermal shutdown, and programmable soft-start.

If 3W of load power or less is needed, refer to the MAX743 data sheet for a device with internal power MOSFETs.

简化框图

MAX742:简化框图 MAX742:简化框图 Zoom icon

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心