Power supply voltage for nrf52 SoC

[Lakerno]

Does nrf52 SoC consumes the same current at different supply voltages(assuming similar operating conditions) ? For eg what is the difference between operating the nrf52 at 1.8V or 3V for current consumption?

In my design I am using a li-ion battery to power NRF52 SoC at 1.8V. Some of the other logic require 3V. So does it make sense to use 1.8V for NRF52, from a power savings point of view??

[Lakerno]

I am using DC-DC converter configuration from the reference schematic. I have additional external power managment IC with an integrated DC-DC output which I want to use for powering nrf52. So there is 2 DCDC converters, one is the external DCDC converter from my PMIC and the second one is the internal DCDC converter in the NRF52 chip.

now, my question is if I use 1.8V supply to power NRF52 from the external DCDC converter OR if I use a 3V external DCDC converter, IS there any difference in the current consumed by NRF52? If the current is the same, then I can use the 1.8V to save some battery.