Can AD8336 can be powered by single supply power, if it's OK, then how can I
connect Vcom? Do I connect Vcom to mid supply?
The AD8336 can be used with a single supply. For a preliminary reference, look
at figure 82 in the AD8337 data sheet and you’ll see a reference and driver
connected for single supply operation of a AD8337. This happens to be designed
for a 5V supply so the output of the regulator is 2.5V.