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TPS62130RGT输出负压,关于EN问题

大家好:

输入8V,输出-5.2V,目前使用TPS62130RGT,TPS62130RGT的使能是上拉另外5V,但是有好几个芯片的EN出现-0.7V,不知道为啥?希望在这里能碰到大神帮忙分析分析为啥?