When I use circuit configuration no.5, VDD connected to VDDH and have 5V going into VBUS, I see a 1.6V output from the VDD_nRF (VDD/VDDH).
Normally when I connect a battery (with LDO to supply 3.0V) to the VDD/VDDH everything works fine. However, if I connect USB power directly to the VBUS and remove the battery, I see a 1.6V at the VDD/VDDH.
This results in the voltage at VDD_nRF at 4.6V another strange thing as it shouldn't add up.
My USB goes to the VBUS directly and goes to an LDO which then output goes tot he VDD_nRF.
Thank you