tps2552输入端5V,输出5V接TPS7A88转换3.3V和1.8V,后面接负载,2552的#en拉高的时候测试其输出为0.8V,此时3.3V变为0V,而1.8V变为1.0V了,不能完全关断。在2552后端对地串了1K欧的电阻负载也不能拉下来,这个是什么原因呢???如果断开tps2552与TPS7A88之间的连接,tps2552的#en拉高的时候输出可以降为0V。这个情况是什么原因引起的呢??
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