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1节电池、升压型、双向寻呼机系统电源IC

完备的电源及监控系统,提供SPI™接口,简化设计、降低成本、节省空间

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主要特征

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主要特征

  • 80mA Output from 1 Cell at 90% Efficiency
  • 13µA Idle Mode™ (coast) Current
  • Selectable Low-Noise PWM or Low-Current Operation
  • PWM Operating Frequency Synchronized to Seven Times an External Clock Source
  • Operates at 270kHz with No External Clock
  • Automatic Backup-Battery Switchover

应用/用途

  • 1节电池供电的手持设备
  • GPS接收机
  • 双向寻呼

描述

The MAX847 is a complete power-supply and monitoring system for two-way pagers or other low-power digital communications devices. It requires few external components. Included on-chip are:

  • A 1-cell input, 80mA output, synchronous-rectified boost DC-DC regulator with a digitally controlled +1.8V to +4.9V output
  • Three low-noise linear-regulator outputs
  • Three DAC-controlled comparators for software- driven 3-channel A/D conversion
  • SPI™-compatible serial interface
  • Reset and low-battery (LBO) warning outputs
  • Charger for NiCd, NiMH, lithium battery, or storage capacitor for RF PA power or system backup
  • Two 1.8Ω (typical) serial-controlled open-drain MOSFET switches


An evaluation kit for the MAX847 (MAX847EVKIT) is available to aid in design and prototyping.

简化框图

MAX847:典型工作电路 MAX847: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