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??

[FormerMember]

Since the core system uses 1.3V, the supply voltage is regulated through either a Linear (LDO) or a switching regulator (DC-DC). DC-DC requires an additional inductor.

In case of a LDO, there the power dissipated is proportional to the difference between the input and output voltage and also proportional to the drawn current.

If you want to use the LDO, then it makes sense to use 1.8V supply. The pro is that you need not use the inductor. The con is that the power consumption will be higher than using DC-DC.

If adding an inductor is not an issue, the DC-DC will give greater power saving. And the supply voltage doesn't matter. And the GPIO voltage will now be 3V, compatible with other components.