I am not quite certain what the advantages/disadvantages are of using LDV vs DCDC if you are using an external regulator. In my case i use a LiPo battery outputting ~4.2V so i need to drop the voltage down to something 1.8-3.6V for the nRF51822.
Would it be more power efficient to use the LDO @ 1.8V or DCDC at some higher voltage like 2.0V? Either is an option im just not sure since i hear DCDC is more power efficient than LDO.
The DCDC is safe to use with the third revision nRF51 hardware and softdevices S110 8.0.0, S120 2.0.0, S130 1.0.0, S210 5.0.0 or S310 3.0.0. See the nRF51 compatibility matrix to identify third revision…
I would like to also append the third option which is the low voltage mode using a regulated 1.8V from the external regulator.