ICL7660, MAX1044 开关电容电压转换器

ICL7660, MAX1044 开关电容电压转换器

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 关键特性

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 应用/使用

从+5V逻辑电源产生-5V电源
	数据采集
	EIA/TIA-232E和EIA/TIA-562电源
	手持式仪表(PDA、掌上电脑)
	运算放大器电源
	面板表
	个人通信设备
	便携式电话

ICL7660, MAX1044 应用电路

典型工作电路