nRF24LU1p VBUS/VDD

[Atlas]

If use D+/D- to transmit data, does need to connect 5V to VBUS or I can open VBUS and connect 3.3V to VDD only?

Thanks. BR Atlas

[Håkon Alseth]

Hi Atlas,

If you want to omit the VBUS, you can supply 3.3V directly to VDD instead. Here is a snippet from the datasheet:

2.2.3 Power supply pins

The nRF24LU1+ contains an on-chip regulator that produces +3.3V on the VDD pins, from the VBUS supply
line (4.0 – 5.25 V). Alternatively, the VBUS pin can be left open and the VDD pins may be fed from an
external 3.3V supply. In this case, the on-chip 3.3V regulator is switched off.

Cheers, Håkon