- Want to know when Power Good is goes high, whether it is at input supply or at the when enable is active.
- And what is the state of PG which is pulled high with 2.5v before enable is active for TPS7A7200
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To answer your questions:
1. PG goes high when VOUT is >90% of the VOUT target. Meaning if VOUT is 3.3V, PG will assert above ~2.97V.
2. As long as VIN is above 1.425V, the internal circuitry is up and running. So PG is held low until VOUT rises above the PG threshold.
I hope this answers your questions