TPS562201: Is there any possibility that reverse current flow from EN pin to IN pin through inside the device?

Part Number: TPS562201

Tool/software:

Hi experts,

our customer have additional question about original thread.

Chen said as followings

> EN pin voltage higher than VIN pin when turn-off input voltage, so you need to add clamp diode between EN and VIN pin. 

And customer wants to know the possibility that a reverse current flow from the EN pin to VIN through inside the IC

I saw a functional block diagram but I couldn't understand.

Thanks and regards,

Tsuyoshi