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降压型调节器如TPS54232在使用负电压拓扑时使能端EN电压是如何定义的?

参考点是哪?是芯片GND管脚电平吗?是高于GND管脚电压超过阈值就使能吗?

还是相对于系统GND电平?还是相对于Vin的某个电压是阈值?

我就是想知道,在使用负电压拓扑时EN端该如何使用:相对于哪一点、多高的电压会使能,多高的电压会禁用。