Does the nRF52833 support external circuitry supply on VDD using high voltage mode?

[Pascal Künzi]

Hi guys,

Is it possible to supply external circuitry from VDD when the nRF52833 is configured in high voltage mode?

I have found the following two devzone entries which are contradicting each other:

•  https://devzone.nordicsemi.com/f/nordic-q-a/84425/question-on-nrf52833-reg0-max-output-current 
  • Assumes that VDD should be able to source up to 25mA.
•  https://devzone.nordicsemi.com/f/nordic-q-a/85333/can-the-vdd-pin-of-nrf52833-be-use-to-supply-another-chip-in-high-voltage-mode/355827 
  • States that external supply is not supported.

I hope you can help me clarify this.

Thank you in advance!

Regards,
Pascal

[ketiljo]

The nRF52833 does not support external circuitry from REG0. The nRF52840 can do this, but not the 833. The regulator itself is the same but the behavior in power off is different so there might be issues with the POR  circuit if you draw current from REG0 when the device is in power off

[Pascal Künzi]

Hi ketilijo

Thank you for the quick response and clarifying this topic!

Regards,
Pascal