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原理图如下，焊接了3块测试板都是同样的问题，仅有LDO5V和LDO3V3输出正常，BUCK1输出仅0.4V左右
另外，BUCK1和后续的电压也有震荡，隔一段时间会降低。
原理图如下，焊接了3块测试板都是同样的问题，仅有LDO5V和LDO3V3输出正常，BUCK1输出仅0.4V左右
