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The XL4101 is a 150KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 3A load with high efficiency, low ripple and excellent line and load regulation. Requiring a minimum number of external components, the regulator is simple to use and include internal frequency compensation and a fixed-frequency oscillator.

一种用于DC-DC电源变换的集成电路，片内包含有温度补偿带隙基准源、一个占空比周期控制振荡器、驱动器和大电流输出开关，能输出1.5A的开关电流。可用于电压的升压，降压以及极性的反转。极性反转的效率最高65%，升压效率最高90%，降价效率最高80%，变换效率和工作频率滤波电容等成正比。另外，输出功率达不到要求的时候，比如>250～300MA时，可以通过外接扩功率管的方法扩大电流，双极型或MOS型扩流管均可。