• 简体中文
• English

MAX1623：3A、低电压、降压型稳压器，内置同步整流与开关

业内尺寸最小的3A DC-DC，带有同步整流器

The MAX1623 switch-mode buck regulator with synchronous rectification provides local CPU and bus-termination power in notebook and desktop computers. An internal 55mΩ (typ), 3A PMOS power switch and 60mΩ (typ), 3A NMOS synchronous-rectifier switch deliver continuous load currents up to 3A from a 5V supply with 95% typical efficiency. Output accuracy is ±1%, including line and load regulation. The MAX1623 features constant-off-time, current-mode pulse-width-modulation (PWM) control with switching frequencies as high as 350kHz. An external resistor at the TOFF pin sets the off-time, allowing optimum design flexibility in terms of switching frequency, output switching noise, and inductor size. This device is available in a space-saving 20-pin SSOP package.

关键特性 ±1% Output Accuracy, Including Line and Load Regulation 94% Efficiency Internal Switches 55mΩ PMOS Power Switch 60mΩ NMOS Synchronous-Rectifier Switch Guaranteed 3A Load Capability Minimal External Components Pin-Selectable Fixed 3.3V, 2.5V, or Adjustable (1.1V to 3.8V) Output Voltage 4.5V to 5.5V Input Voltage Range 400µA (typ) Supply Current <1µA Shutdown Supply Current Constant-Off-Time PWM Operation Switching Frequencies Up to 350kHz Idle Mode™ Operation at Light Loads Thermal Shutdown Protection Available in 20-Pin SSOP

MAX1623：典型工作电路 应用 5V至3.3V转换 CPU子卡电源 台式计算机总线端接电源 DSP电源 笔记本电脑CPU I/O电源

数据手册DataSheet

关键参数

开发工具

• MAX1623EVKIT

技术资料

• Dual Voltage Tracking Circuit for I/O, Microprocessor, and DSP Core Voltages

质量和环境数据

• MAX1623.pdf

相关产品

• MAX1644：2A、低电压、降压型稳压器，内置同步整流与开关
• MAX1636：低电压、高精度降压型控制器，用于便携式CPU电源

订购型号