In looking at the schematic here, I note that there is a 3v3 regulator U5 specified as nf (not fitted). But it looks from the pinouts as though you definitely had a regulator in mind.
I usually use the TPS736 but it looks like this regulator has pins for additional filtering (inductor L6, etc.)
Can you tell me what regulator you had in mind for this design?
Thanks,
DougM