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TPS73701的EN脚问题

请教在使用TPS73701做产品,出现异常。

Vin=5v,Vout=3.3v。

最近在生产上发现有34台产品出现TPS73701异常,测试发现EN脚对地短路,阻抗只有几Ω,EN脚电压1.5V左右。

生产中半成品测试时会有热插拔,手册中并未看到这颗芯片支持热插拔,会不会是插入瞬间引入大的电压电流冲击损坏了芯片?