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TPS5430: EN脚低电平不能关闭DC芯片功能,输出还有6.6V左右压降

Part Number: TPS5430


使用TPS5430做了12V转5V的电路设计,目前EN高电平时,芯片可以正常输出5V电压。EN低电平时,却关闭不了。

EN=0时,输出波形和PH波形如下

我的layout 感觉也没问题