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.

TPS54232 - Ringing noise

Other Parts Discussed in Thread: TPS54232

TPS54232 - Ringing noise

Hi everybody,

i've recently designed a 3.3V 2A step-down (6-12V IN) with the IC tps54232 but I have a problem with the output noise. I've got this pretty bad ringing noise around 1Mhz (I guess it's when the mosfet open/close).

Noise at 7.5V Input and 20Ohms load:

I wonder if my inductance is sufficient enough but i do the math and i'ts should be ok ( specs ). Or it may be my layout but i've fallowed the TI layout pretty much.

It's just the top side, the bottom is a ground plane.

And finally my scheme:


B.O.M : http://www.digikey.ca/short/7bdt48

Thanks! And sorry for my english it's not my primary language.