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MAX1627：5V/3.3V或可调、100%占空比、高效率、降压型DC-DC控制器

高效、低成本、降压控制器，非常适合1.5V CPU I/O供电

The MAX1626/MAX1627 step-down DC-DC controllers operate over a 2.6V to 16.5V input voltage range. The controllers deliver load current from 1mA to more than 2A. The MAX1626 has pin-selectable 3.3V and 5V outputs. The MAX1627 supports adjustable outputs from 1.3V to 16V. A unique current-limited, pulse-frequency-modulation (PFM) control scheme operates up to 100% duty cycle, resulting in very low dropout voltage. This control scheme eliminates minimum load requirements and reduces supply current under light loads to 90µA (versus 2mA to 10mA for common pulse-width modulation controllers). The devices are available in a 8-pin SOIC package (-40°C to +85°C) and dice (0°C to +70°C).

关键特性 Reduce External Components and Total Cost 300KHz PWM Switching Reduces Component Size Tiny Surface-Mount Inductor Reduce Power Dissipation > 90% Efficiency from 3mA to 2A Loads Low Dropout Voltage 100% Maximum Duty Cycle Reduce Number of DC-DC Controllers to Stock Wide 2.6V to 16.5V Input Voltage Options Selectable 3.3V and 5V or Adjustable 1.3V to 16V Output Voltage Options Reduce System Power Consumption 90µA Max Quiescent Current 1µA Max Shutdown Current Operates Reliably in Adverse Environment Soft-Start Limits Startup Current Current-Limited Control Scheme Increase Design Flexibility External P-Channel MOSFET Allows Output Power of > 12.5W

MAX1626、MAX1627：典型工作电路 应用 5V至3.3V绿色PC应用 电池供电应用 手持式计算机 高效降压转换器 低成本笔记本电脑电源 元件数最少的DC-DC转换器 PCMCIA电源 PDA及其它手持设备 便携式终端

数据手册DataSheet

关键参数

开发工具

• MAX1626EVKIT

质量和环境数据

• MAX1627.pdf

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