Maxim MAX8655 25A同步PWM降压电源解决方案

Maxim公司的MAX8655是25A输出电流同步PWM降压电源稳压器,输入电压4.5V-25V,输出电压从0.7V到5.5V可调.集成的功率MOSFET提供小占位面积,容易布局和降低EMI等优点,主要用在POL电源,通信电源,网络设备,非隔离的DC/DC转换器,服务器和工作站,笔记本电脑,IBA电源等.本文介绍了MAX8655主要特性,方框图,多种典型应用电路以及MAX8655评估板电路图和材料清单(BOM).

The MAX8655 synchronous-PWM buck regulator operates from a 4.5V to 25V input and generates an output voltage adjustable from 0.7V to 5.5V at loads up to 25A.

Integrated power MOSFETs provide a small footprint, ease of layout, and reduced EMI. Removing the board trace inductances ensures the highest efficiency at high frequency.

The MAX8655 uses peak current-mode control architecture with an adjustable (200kHz to 1MHz), constantswitching frequency, which is externally synchronizable. The MAX8655’s adjustable current limit uses the inductor’s DC resistance to improve efficiency or an external sense resistor for higher accuracy. Foldback type current limit is available to reduce the power dissipation under severe-overload or short-circuit conditions. A reference input is provided for use with a high-accuracy external reference or for DDR and tracking applications.
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