Hello,
For us our IO rail is 1.8V. In this case do you see a big difference in power consumption whether REG1 is in LDO mode or DCDC mode? From 1.8V to 1.3V if in LDO mode the efficiency is about 72% best case. In DCDC mode I don’t see any efficiency plots or a quiescent current in the datasheet (maybe I am just not looking in the right place). But I am thinking it is probably 85% or so. Does this sound about right ? I don't see any significant advantage to using the DCDC for REG1 unless the nRF is in HV mode where the output of LDO0 is much higher than 1.8V.
Harry
