Current consumption is same with 3.3V and 1.8V supply.

RE: Current consumption is same with 3.3V and 1.8V supply.

Stian Røed Hafskjold — Tue, 23 Oct 2018 07:54:27 GMT

Usually it's disabled by default in the SDK example code. You can read out this register to see if it is enabled or not: http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52840.ps/power.html?cp=2_0_0_4_2_6_9#register.DCDCEN

Or you can just write 0 or 1 to the register in start of main to disable or enable the DCDC.

DCDCEN is for the VDD regulator. DCDCEN0 is for the HVDD regulator (high voltage).

RE: Current consumption is same with 3.3V and 1.8V supply.

Bharath Gopal — Mon, 22 Oct 2018 06:41:34 GMT

Hi Stian,

Thank you for the response.

How do I know if DCDC regulator is enabled or not?

Thank you,

Bharath

RE: Current consumption is same with 3.3V and 1.8V supply.

Stian Røed Hafskjold — Wed, 17 Oct 2018 11:53:41 GMT

If you don't enable the internal DCDC regulator, the chip uses the internal LDO regulator by default. In LDO regulators the current is not a function of voltage.

Remember to turn off logging, this will consume about 0.5mA when active. (NRF_LOG_ENABLED in sdk_config.h)