Max current from 3.3v PEX

I’d like to know how much current is safety available from 3.3v pin in PEX connector.

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I’ve asked Daniel to measure this for real.

But, according to my prior measurements 200mA is safe, 250mA is probably safe and 300mA is pushing it

We have the definitive word from Daniel:

I tested 4 boards and they all tested within 4mA of 275mA.
Min 271mA, max 279mA