This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
I've decided to use a couple of TPS54429E buck converters in a new design and I just wanted to get some guidance on my layout since I've use the QFN part which does not have a recommended layout shown in the datasheet. The schematic and layout are shown below, I've got the 12V power coming in from the bottom, and 5V exiting at the top. I plan to use the same part for a 3v3 rail, and will likely use an identical layout but with different values for some components.
I'd really appreciate if someone could have a look at my layout and let me know if it is going to be adequate. I've done my best to folow the layout guidelines, but could do with a sense-check to make sure I've not missed anythnig significant in this first draft. The PCB will be 4 layers, with a ground plane directly below the top layer.
Thanks.
Hi Craig,
Let me take a look and get back to you by tomorrow.
Thanks,
Amod
Hi Craig,
Sorry for the inconvenience of not having a reference TPS54429E QFN layout in the datasheet. Please refer to TPS54526 page 20 for this layout. It is identical pinout and package so that should work.
Some comments:
1. C17 should be directly connected to VREG5. Please note C17 should not be connected to PG as shown in schematic.
2. R10 is not required.
3. I would follow TPS54526 layout as closely as possible:
Thanks,
Amod