Other NXP Products中的主题 LS1023/43 USB VBUS

LS1023/43 USB VBUS

fabio_sponticci — Fri, 09 Apr 2021 10:22:41 GMT

Hi,

I'm testing our prototypes and I found the step-up (3V3 to 5V) I'm using to provide the USB[1,2,3]_VBUS, is quite noisy. See attached picture.

So far I have no issue on the USB links but I have not started to stress the interfaces yet.

Even if I'm inside the tolerance I would like to understand if the ac component could be an issue, and if I have to change the dcdc.

Regards

Fabio

ufedor — Fri, 09 Apr 2021 16:37:23 GMT

Something is really wrong with the 5V converter.

Please consult with the device manufacturer support.

fabio_sponticci — Mon, 12 Apr 2021 07:55:29 GMT

Thanks, I'm aware of that and I'm working on that side too, therefore you're suggesting to improve it.

Have a good day