nRF52840 Dongle draws more current on VDDH than VDD

[hestro92]

Hi,

We're currently developing a low-power framework for the nRF52840 and testing the application on a Dongle configuration. We have no problems when supplying the chip with a 3.3V voltage on the VDD pin to reach around 3.5-4 µA standby current. However when we change to supplying 5V on the VDDH pin instead we reach levels of 250 µA. We've made the appropiate cuts and connections concerning the SBs on the dongle and made no changes to choice of regulator. Do you have any idea what may cause this issue?

Thank you!

[Stian Røed Hafskjold]

Hi, I tried here as well and I see the same thing. I removed FB1 and the current dropped down to normal idle. So seems like D1 is consuming current when J1 is unplugged.