Adding a highly efficient/stable 5.1v regulator to my PiNAS

Dec 4, 2024 10:33 PM

My PiNAS (Pi based SAN) project uses an ATX PSU for the 12v and 5v, but the RPi5 technically wants 5.1v, and it spams syslog when it goes bellow that.
I had one of those cheap buck converters from amazon, but it blew up, and they seem to have a history of doing that.
So, I went on a quest to design my own 5.1v regulator circuit with top-shelf parts for maximum reliability and stability.
I wanted something fully integrated (internal crystal, vref, and drivers), and rated for 5A.
I landed on the TPS5450 from Texas Instruments. After putting together a BOM, the price was pretty close to their eval board that sports a full TPS5450 based circuit. The only caveat was that it's set for 5v output, but that can be adjusted by changing the feedback resistors. So that's what I decided to do. Thanks TI for doing the work for me.
Side note: Yes, if I needed like 10 or 20 boards, having my own pcb printed would end up being cheaper, but I just needed 1 for now, and maybe a 2nd later

electrical_engineering

shopping

pinas

I don't know the first thing about circuitry but Hehe Pinas

8 months ago | Likes 4 Dislikes 0

hahahah PiNAS

8 months ago | Likes 4 Dislikes 0