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TPS51100发热严重

Other Parts Discussed in Thread: TPS51100, TPS54386

使用TPS51100给DDR3供电,但是出现有很大一部分板子上的TPS51100芯片发烫严重。原理图如下所示

之前出现过类似的现象,但是改了V_DDR和5V的上电顺序,就不发热了。这次做了几十片,大部分都发热严重,改上电的顺序也没有效果。请问这种现象是有什么引起的呢?