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如上图，利用芯片的电压选择输出想要的5.1V，但是实际上输出变成8.2V，请问是不是输出电容选得不对？输入输出都是用的100uF的钽电容，另外芯片的pad脚我没接地，悬空的，不知是否有影响，麻烦指导下，谢啦
