nRF52840 on PCIe mini card & VBUS question

[Aleksej]

Hi,

I'm working on a design with nRF52840 on PCIe Mini Size card. Since there is no VBUS rail on PCIe connector and I need a communication via USB, is it possible to bypass the detection on VBUS pin or is a dedicated 3.3V-to-5V boost converter my only one option?

[Kenneth]

Hi,

The USB peripheral have it's own power domain internally, so you need to feed VBUS for the USB interface to work.

Kenneth