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请教一款三输出的线性电源



要求:

1、体积不要太大,板子的空间有限,是替换原来选择的电源芯片的;

2、输入5V电压,输出两路3.3V(最大电流分别不小于500mA),一路1.8V((最大电流不小于500mA);

3、纹波要尽量小,这是控制模拟芯片电路的;

4、线性电源、三输出,最好是带上点顺序控制的,没有亦无妨;

谢谢!