In a design, we originally had ADP150ACBZ-2.6R7 for the OTP supply voltage. This output voltage seems (currently) a bit hard to find so changed to 2.75V since we already used ADP150ACBZ-2.75R7 in our design.
Anyway, from the BF52x datasheet:
VDDOTP, (OTP Supply Voltage), min 2.25, nominal 2.5, max 2.75
Would you say it's risky to stay at maximum supply voltage +/- 1% (for the ADP150) !?