LS1023/43 USB VBUS

[fabio_sponticci]

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 · Accepted solution]

Something is really wrong with the 5V converter.

Please consult with the device manufacturer support.

[fabio_sponticci]

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