Tool/software:
Hello,
I'm using this regulator to power a Raspberry Pi. I have a power board that the Pi plugs into and the circuit is on there. I essentially copied the example circuit provided for 5V 5A and am running the regulator from 12V -> 5V. This circuit definitely works, the Pi boots up and I can operate for around 5-10 minutes, but then the Pi reboots and gets stuck in a reboot cycle it never recovers from. In our debugging of the issue, we found that pointing a small fan at the assembly stopped this behavior from happening. I was skeptical that the Pi was overheating, so disconnected the 5V circuit output and powered the Pi up separately (with no fan) and that never had the reboot issue.
So it seems like the regulator is overheating for some reason. Or maybe there is a spike in current draw from the Pi that triggers a bad transient response on the regulator that is somehow tied to temperature? See the below trace data. There are brown outs on the 5V line that seem to be causing the reboot.
Any advice on updates to the circuit would be very appreciated. This regulator should be more than enough to power a Pi. I read that Pi 4s can be picky with power supplies, but again, it does work and then something causes these voltage dips. I am looking to do a respin and would like to fix this issue.
Regulator schematic:
