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我用TPS62175由12V转-5V，但是输出只有0.47V，SW管脚波形如图，这是说明芯片坏了吗？谢谢
你好，原理图PCB传上来看看，谢谢。
HI
注意芯片的GND是接到-5V上的，同时电容别接反了？
楼主，你可以看一下这篇文章，专门讲TPS62175做inverter buck-boost，对照一下里面的设计要点，希望对你有用。
