LMR33630-Q1: Can Enable signal come before Vin?

Hello Elec, per the ABSMAX table, unfortunately, EN cannot exceed VIN by 300mV.

So no.

LM61430-Q1 does not have this concern.

Hello Elec,

My understanding is you are describing a scenario where Vin maybe at a voltage potential (or floating), less than EN.

In ABSMAX table, EN max voltage potential is VIN + 300mV, thus, if the above scenario is true, you would be violating the ABSMAX table and device performance cannot be guaranteed.