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TPS5430: TPS5430DDAR的一个9V转-8V的设计,输出一直没有

Part Number: TPS5430

原理图和Layout如图,其中R94没焊。

TPS5430DDAR的一个9V转-8V的设计,输出一直没有,测了4脚参考电平也是0V,奇怪。

是啥原因,热焊盘没焊接牢造成的?或者本身这个设计就出不来结果?