Um. The 3.3V regulator comes AFTER the 5V regulator, so it would never dissipate more than about 0.3W regardless of input voltage to the board. (now, the 5V regulator could get in trouble, but it's still spec'ed at a much higher current.)
Um. The 3.3V regulator comes AFTER the 5V regulator, so it would never dissipate more than about 0.3W regardless of input voltage to the board. (now, the 5V regulator could get in trouble, but it's still spec'ed at a much higher current.)