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5A/2A、降压型、PWM、开关模式DC-DC稳压器

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主要特征

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主要特征

  • Input Range: Up to 40V
  • 5A On-Chip Power Switch (MXL1074)
  • 2A On-Chip Power Switch (MXL1076)
  • Adjustable Output: 2.5V to 35V
  • 100kHz Switching Frequency
  • Excellent Dynamic Characteristics
  • Few External Components
  • 8.5mA Quiescent Current
  • TO-220 Package

应用/用途

  • 从高压总线产生分布式电源
  • 大电流反相器
  • 大电流、高电压降压应用
  • 隔离型DC-DC转换
  • 多输出降压控制器
  • 负电源升压型转换器

描述

The MXL1074/MXL1076 are monolithic, bipolar, pulse-width modulation (PWM), switch-mode DC-DC regulators optimized for step-down applications. The MXL1074 is rated at 5A, while the MXL1076 is rated at 2A. Few external components are needed for standard operation because the power switch, oscillator, and control circuitry are all on-chip. Employing a classic buck topology, these regulators perform high-current step-down functions, but can also be configured as an inverter, a negative boost converter, or a flyback converter.

The regulators have excellent dynamic and transient-response characteristics, while featuring cycle-by-cycle current limiting to protect against overcurrent faults and short-circuit output faults. The MXL1074/MXL1076 also have a wide 8V to 40V input range in the step-down configuration. In inverting and step-up configurations, the input can be as low as 5V.

The MXL1074/MXL1076 are available in a 5-pin TO-220 package. The devices have a preset 100kHz oscillator frequency and a preset current limit of 6.5A for the MXL1074, and 2.6A for the MXL1076. The MXL1074/MXL1076 are pin compatible with the LT1074/LT1076.

简化框图

MXL1074、MXL1076:典型工作电路 MXL1074、MXL1076:典型工作电路 Zoom icon

Technical Docs

支持和培训

在Maxim的知识库中搜索技术问题的答案

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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