wuchy143
Member
Hi all,
I'm trying to find a good p-channel mosfet candidate for a +5v power select circuit. Essentially the design will have two independent +5V power inputs. The circuit I attached will select the power source which has power on it and will draw from that source only.
The problem I'm facing is having very little body diode voltage drop. I want my circuit to see as close to +5v as possible. You will see in my schematic that due to the normal .6v drop across the body diode I get ~4.4v out for power to my design.
Are there any p-channels out there that can handle at least 2 Amps but rated for 5 for a decent de-rating?
Thanks.
I'm trying to find a good p-channel mosfet candidate for a +5v power select circuit. Essentially the design will have two independent +5V power inputs. The circuit I attached will select the power source which has power on it and will draw from that source only.
The problem I'm facing is having very little body diode voltage drop. I want my circuit to see as close to +5v as possible. You will see in my schematic that due to the normal .6v drop across the body diode I get ~4.4v out for power to my design.
Are there any p-channels out there that can handle at least 2 Amps but rated for 5 for a decent de-rating?
Thanks.