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TPS53014: Can the customer apply 3.3V external power to the buck converter output trace if Vin is open?

Ikoma
Intellectual 940 points
Part Number: TPS53014

Hi Expert,

This is a similar question on the thread linked below but target device is different.
https://e2e.ti.com/support/power-management/f/196/t/795968

The customer uses TPS53014 to configure a 3.3V Vout buck converter on their application board. So, normally they uses this converter to supply 3.3V power on their application circuit. However, there is a case that they want to apply 3.3V power by external source for test purpose. In this case, can the customer apply 3.3V external power to the output trace of TPS53014 buck converter?
In other words, can the customer apply 3.3V to SW node trace in case that there is no voltage applying on Vin and EN pin?

I think if Vin is not open and a current path can be assumed from Vout to Vin via body diode of high side FET, it can't be allowed. But if Vin is open, it maybe OK. Do you have any other concern about this use case?

Thanks for your help in advance.

Regards,