I am using a P-Channel MOSFET to build a buck converter and change 12VDC, 2A (from a 12V battery) to 5VDC, 2A (for cell phone charging), should I use a MOSFET rated for 20V, 2A or -20V, -2A?
I am new to this, so sorry for the basic question. A simple one word answer will do, don't trouble yourselves too much with an explanation.
Thanks!!!!