Hi Sonya,
For the ADV7612 on EVAL-ADV7612-7511, I used an ADP1715-3.3 to generate 3.3V from 5V and an ADP1715-1.8 to generate 1.8V from 5V.
I don't think we've had any issues with this approach, but the 5V to 1.8V is quite a large voltage drop, so on…