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TPS54622的SS pin 电压咨询

这三段中都有提到VSS的电压,第一个是说VSS处电容的设置,参考电压是0.8V,不是表示VSS的电压是0.8V吗?

第二段第三段提到VSS小于1.4V的时候PWRGD为低,高于1.4V的时候才有打开低边MOSFET的可能。这里不就是说VSS可以高于0.8V吗

请问这里怎么解释 谢谢