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紧凑的、高效率、双输出、升压型DC-DC转换器

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主要特征

应用/用途

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主要特征

  • Dual Step-Up Converter in a Tiny 10-Pin µMAX Package
  • Main Output
    • Up to 125mA Load Current
    • Fixed 3.3V or Adjustable 2.5V to 5.5V
    • Up to 88% Efficiency
    • Internal Switch
  • LCD Output
    • Up to 28V for LCD Bias
    • Internal Switch
  • Input Voltage Range +1.5V to +5.5V
  • Minimal External Components Required
  • 0.1µA Logic-Controlled Shutdown
  • Low 15µA Quiescent Supply Current

应用/用途

  • GPS接收机
  • MP3播放器
  • 数字助理/转换器
  • PDA

描述

The MAX1817 is a compact, high-efficiency, dual-output step-up converter for portable devices that provides both the main logic supply and the LCD bias. The device operates from an input voltage of +1.5V to +5.5V, allowing the use of 2- or 3-cell alkaline batteries, or 1-cell lithium-ion (Li+) batteries.

The MAX1817's main regulator supplies 125mA at either a preset 3.3V or an adjustable 2.5V to 5.5V output voltage with up to 88% efficiency. A 0.1µA shutdown state also minimizes battery drain. The MAX1817's secondary step-up converter provides the LCD bias voltage and is adjustable up to +28V.

Other features include a fast switching frequency to reduce the size of external components and a low quiescent current to maximize battery life. Both outputs can be independently shut down for improved flexibility.

The MAX1817 is supplied in a compact 10-pin µMAX package. The MAX1817 evaluation kit (MAX1817EVKIT) is available to speed up design.

简化框图

MAX1817:典型工作电路 MAX1817:典型工作电路 Zoom icon

技术文档

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