MAX1790, MAX8715 低噪声、升压型DC-DC转

2011-04-04 22:19:47来源: 互联网

MAX1790, MAX8715 概述

The MAX1790/MAX8715 boost converters incorporate high-performance (at 1.2MHz), current-mode, fixed-frequency, pulse-width modulation (PWM) circuitry with a built-in 0.21Ω /0.15Ω n-channel MOSFET to provide a highly efficient regulator with fast response.

High switching frequency (640kHz or 1.2MHz selectable) allows easy filtering and faster loop performance. An external compensation pin provides the user flexibility in determining loop dynamics, allowing the use of small, low equivalent-series-resistance (ESR) ceramic output capacitors. The device can produce an output voltage as high as 12V from an input as low as 2.6V.

Soft-start is programmed with an external capacitor, which sets the input-current ramp rate. In shutdown mode, current consumption is reduced to 0.1µA. The MAX1790/ MAX8715 are available in a space-saving 8-pin µMAX® package. The ultra-small package and high switching frequency allow the total solution to be less than 1.1mm high.

µMAX is a registered trademark of Maxim Integrated Products, Inc.

MAX1790, MAX8715 关键特性

  • 90% Efficiency
  • Adjustable Output from VIN to 12V
  • 1.6A, 0.21Ω, 14V Power MOSFET (MAX1790)
  • 2.4A, 0.15Ω, 14V Power MOSFET (MAX8715)
  • +2.6V to +5.5V Input Range
  • Pin-Selectable 640kHz or 1.2MHz Switching Frequency
  • 0.1µA Shutdown Current
  • Programmable Soft-Start
  • Small 8-Pin µMAX Package

    MAX1790, MAX8715 应用/使用

    手持式设备
  • LCD显示器
  • PCMCIA卡
  • 便携式应用

    MAX1790,MAX8715应用电路

    MAX1790,MAX8715:典型工作电路
    典型工作电路

  • 关键字:MAX1790  MAX8715  DC-DC

    编辑:神话 引用地址:http://www.eeworld.com.cn/mndz/2011/0404/article_6558.html
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