我用LM5118做了一个设计，输入11-15V，输出12V，做了一批板卡，发现有一部分板卡输出不正常，测量我发现UVLO电压不对，是用电阻分压做的，正常情况下都有2.4V，但有问题的板卡几乎为0V，我看规格书此引脚悬空也可以，把电阻卸掉，电压还是接近0V，我原来以为芯片坏了，但更换了芯片，还是一样的。请高手分析一下原因，谢谢！
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