Overheating of LM1117 SOT223, 5v-3.3v
Your regulator appears to be connected incorrectly. 



The minus side of the two tantalum caps (presumably your ground) is connected to the "input" pin. 

Putting reverse voltage on the chip is a good way to turn it permanently into a heater or NED (Noise Emitting Diode). 



Your problem may be visible in the schematic, but it's probably more likely that you have a problem with the mapping of the schematic symbol pins to the footprint.