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TPS5430: 12V转-5V输出却为正电压

Part Number: TPS5430

参考TI论坛和网络上一些tps5430转负电源的设计,将GND与Vout互换,输出Vout为+5V,这是什么问题啊?

下面这是我的原理图和PCB设计,求大佬帮忙看看