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TPS55340上电就烧掉芯片,求指点



最近设计了一个TPS5534芯片的demo板子,焊接上去了,一通电就将芯片少点了,原理图是按照官方推荐的那个升压24V的电路

实际焊接是这样的,C7焊56nF,R3是0R,R11是2.4K,C12是两个200pF电容串联得到的,R4是18.7K+30K+30K得到,R1是35.7K,R5是150K,C1、C2、C3、L2没有焊接

layout是这样子的