TPS54394: I have an issue about the layout in the datasheet.

? ?

Part Number: TPS54394

Tool/software:

Hi,i have an issue about the layout in the datasheet at 16-17 page,the SW pin of the ic connect to the inductance, that isn't in top layer,but in inner layer,why do it? I observed other DC-DC chips where the SW pins and inductor wiring are on the same layer,so I'm confused.

5 months ago

0 Gautam Iyer 5 months ago

TI__Genius 10960 points

Hi,

This way analog and non-switching components are away from switching components (physically away on the same layer with electrical connection on bottom or inner layer). Another aspect I can think about is to minimize RE.

? ? said:
I observed other DC-DC chips where the SW pins and inductor wiring are on the same layer,so I'm confused.

You can very well have this implementation too and depends on your application and compliance requirement. This is a very old device and the recommendation for the same might hold true then - I'm not aware about the history but let's follow what has been documented.

Regards,

Gautam