MPM3650C Power Good Voltage rating in Unpowered State

Hello:

I plan on using the Power Good pin on the MPM3650C to begin a power up sequence using several MPS POL devices, I must power the pullup to the PG1 and PG2 with a external power supply which already powered when the MPM3650C is unpowered, is there a latch up condition issue?

I did see the EN pin and the VIN must be equal (I assume less than as well) , does this give me a specification?