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TPS65910A3A1 产品无法正常输出电压

我按照参考板原理图做的电路如下,  目前调试情况是: 提供5V收入后, VRTC 可以输出1.8V.  但是我将Pin33的PWRON直接接地超过10s钟后释放后, 芯片并没有按预想的输出各种电压. 求大神看看我这个电路问题出在哪里?