Electronics > PCB/EDA/CAD
12V-5V buck converter layout feedback using TPS54331DR IC
newtekuser:
Using a TPS54331DR as switching IC for a 12V-5V buck converter and need some feedback on the layout. I used the sample layout suggested in the TPS datasheet with some small adjustments.
The stack-up is 4 layer (SIG, GND, PWR, GND).
Attached are the schematic and PCB layout. Thanks in advance!
daisizhou:
https://we.tl/t-RjTRRjgkeH
Here is the complete PCB layout, please check it out
newtekuser:
--- Quote from: daisizhou on December 24, 2024, 11:28:54 am ---https://we.tl/t-RjTRRjgkeH
Here is the complete PCB layout, please check it out
--- End quote ---
Thanks, but I'd like to get feedback on the layout I attached.
daisizhou:
https://www.douyin.com/user/MS4wLjABAAAAsrnydfX_gbCgGmRky_QT9Wb2DWgu3HW4-OZdRTNBeYxiiXZc4KSjrQEkq0Rp1N6v?from_tab_name=main&modal_id=7350684535358590219&vid=7450517367639149834
Please watch this video, you will find the answer you want.
thm_w:
- You don't have the topside ground which they mention in the datasheet.
- D5 should have topside ground or more vias.
- C23 and C27 can move closer to D5
- Feedback trace can be a bit shorter
I'm sure it will work fine as is, but its a fair departure from the datasheet layout.
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