That would depend on which Arduino you are talking about. You can actually find this info on your own. Look at the schematics for your arduino, find out what regulator it uses for 3.3V, then look up the datasheet.
That would depend on which Arduino you are talking about. You can actually find this info on your own. Look at the schematics for your arduino, find out what regulator it uses for 3.3V, then look up the datasheet.