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MAX769

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2或3节电池、升/降压型、双向寻呼机系统电源IC

完备的电源及监控系统，简化设计、降低成本、节省空间

可打印的数据手册 订阅

产品详情

主要特征

简化框图

Technical Docs

数据资料 2或3节电池、升/降压型、双向寻呼机系统电源IC Oct 01, 1998

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 。

主要特征

  • Regulated Step-Up/Step-Down Operation
  • 80mA Output from 3 Cells
  • 85% Efficiency
  • 13µA Idle Mode™ (coast) Current
  • Selectable Low-Noise PWM or Low-Current PFM 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

  • 2节或3节电池供电的手持设备
  • GPS接收机
  • 双向寻呼

描述

The MAX769 is a complete buck/boost power supply and monitoring system for two-way pagers or other low-power digital communications devices. Few external components are required. Included on-chip are:
  • An 80mA output, synchronous-rectified, buck/boost DC-DC converter with a digitally controlled +1.8V to +4.9V output. The DC-DC converter is unique, since it provides a regulated output for battery inputs that are both less than and greater than the output voltage, without using transformers.
  • 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 for beeper or vibrator drive
An evaluation kit for the MAX769 (MAX769EVKIT) is available to aid in design and prototyping.

简化框图

MAX769：典型工作电路 MAX769：典型工作电路 Zoom icon

Technical Docs

数据资料 2或3节电池、升/降压型、双向寻呼机系统电源IC Oct 01, 1998

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 。