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ICL7660, MAX1044 開關電容電壓轉換器

2008-10-24 13:23www.elecfans.co 本站我要評論（0）我要收藏

ICL7660, MAX1044 開關電容電壓轉換器

ICL7660, MAX1044 概述

The MAX1044 and ICL7660 are monolithic, CMOS switched-capacitor voltage converters that invert, double, divide, or multiply a positive input voltage. They are pin compatible with the industry-standard ICL7660 and LTC1044. Operation is guaranteed from 1.5V to 10V with no external diode over the full temperature range. They deliver 10mA with a 0.5V output drop. The MAX1044 has a BOOST pin that raises the oscillator frequency above the audio band and reduces external capacitor size requirements.

The MAX1044/ICL7660 combine low quiescent current and high efficiency. Oscillator control circuitry and four power MOSFET switches are included on-chip. Applications include generating a -5V supply from a +5V logic supply to power analog circuitry. For applications requiring more power, the MAX660 delivers up to 100mA with a voltage drop of less than 0.65V.

ICL7660, MAX1044 關鍵特性

  • Miniature µMAX Package
  • 1.5V to 10.0V Operating Supply Voltage Range
  • 98% Typical Power-Conversion Efficiency
  • Invert, Double, Divide, or Multiply Input Voltages
  • BOOST Pin Increases Switching Frequencies (MAX1044)
  • No-Load Supply Current: 200µA Max at 5V
  • No External Diode Required for Higher-Voltage Operation

    ICL7660, MAX1044 應用/使用

    從+5V邏輯電源產生-5V電源
  		•  數據采集
  		•  EIA/TIA-232E和EIA/TIA-562電源
  		•  手持式儀表(PDA、掌上電腦)
  		•  運算放大器電源
  		•  面板表
  		•  個人通信設備
  		•  便攜式電話

    ICL7660, MAX1044 應用電路

    ICL7660,MAX1044:典型工作電路
    典型工作電路

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