I have a Microchip PIC board (18F46K22) which has a VIN pin to connect to a power source (7vdc + supply).
What happen if I feed 3.3V to the VIN which goes through the 5V linear regulator (ST 78M05)?
The 18F46K22 is able to run on 5v or 3.3v supply. I would like to force the board to run on 3.3V so it will solve my logic voltage level issues easily.
I am asking because I can't find any information regarding going lower voltage than the linear is normally regulating.