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数码相机升压型DC-DC从控制器

从控制器,配合MAX1800和MAX1802主控制器件工作扩展电源输出

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主要特征

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主要特征

  • Provides Simple Expandability for the MAX1800 and MAX1802 Master Converters
  • Operates in Step-Up, SEPIC, and Flyback Topologies
  • 100kHz to 1MHz Adjustable Operating Frequency
  • Duty-Cycle Limit Adjustable from 40% to 90%
  • Soft-Start
  • Short-Circuit Protection
  • 0.01µA Supply Current in Shutdown Mode
  • Tiny 8-Pin SOT23 Package

应用/用途

  • 数码相机
  • 数字摄像机
  • 手持式设备
  • 网络浏览器
  • PDA
  • 便携式DVD播放器

描述

The MAX1801 step-up slave DC-DC controller is used with either the MAX1800 (step-up) or the MAX1802 (step-down) master DC-DC converter to provide a complete power-supply solution for digital still and digital video cameras. By using the master converter's reference voltage and oscillator, the size and the cost of the slave controller are reduced and all converters are guaranteed to switch at the same frequency.

The MAX1801 drives an external N-channel MOSFET and can be used in step-up, single-ended primary inductance converter (SEPIC), and flyback topologies. If extra supplies are required for a new design, slave controllers can be added to an existing master circuit with minimal redesign, saving both cost and time. The MAX1801 features a built-in soft-start, short-circuit protection, and an adjustable duty-cycle limit.

The MAX1801 is available in a space-saving 8-pin SOT23 package. Separate evaluation kits combining the MAX1800/MAX1801 (MAX1800EVKIT) and MAX1802/MAX1801 (MAX1802EVKIT) are available to expedite designs.

简化框图

MAX1801:典型工作电路 MAX1801: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

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