U3 chip super hot

Hi, I have a 1708 controller, cannot able to turn on. from battery the u3 chip not heat up but from usb the chip start to heat up. the chip VIN is 5v, but as far as i know from the schematic it needs 3v/b+. No burning marks, all capacitors tested with multimeter. Maybe the U1 chip is faulty? it makes 3v/b+ from 5v. any suggestions?

Thanks!