MAX1623 - 3A、低电压、降压型稳压器，内置同步整流与开关

MAX1623是Maxim美信半导体公司的一款DC-DC开关调节器产品，MAX1623是3A、低电压、降压型稳压器，内置同步整流与开关，本站介绍了MAX1623的封装应用图解、特点和优点、功能等，并给出了与MAX1623相关的Maxim元器件型号供参考。

MAX1623 - 3A、低电压、降压型稳压器，内置同步整流与开关 - DC-DC开关调节器 - 业内尺寸最小的3A DC-DC，带有同步整流器 - 美信半导体

产品概述

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

以下关键特性由Maxim美信半导体提供：

±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

热门应用

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

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