最近仿照pga281evm的评估板自己画了一块板子。但是电源模块TPS7A4101 一直出错(只焊接了电源部分)。vsop一直输出在0.2v左右(理论输出5v),pcb和原理图如下。和pga281evm datasheet给出pcb设计几乎一样,实在找不出原因,求指教!
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