Power savings of using 32kHz and/or DCDC converter

Question

Hi 
 I'm currently working on a small nRF52 based design, and I have been asked to keep the cost as low as possible, while maintaining a good battery life while being powered by a CR2032. 
 The application will be advertising and transmitting data once every second when not in the OFF mode. 
 My gut feeling is that I will get the most bang for my buck by adding the inductors for the DC-DC converter, as it almost cuts the radio currents in half. 
 But has any one attempted to measure the additional power used by the RC recalibration cycle?

Einar Thorsrud · Accepted Answer

I do not have exact numbers for the RC calibration power consumption for the nRF52. However, it is normally not significant. A DC-DC converter on the other hand has a significant impact on power consumption, so this where you should put your money. 
 RC recalibration is only needed when the temperature changes, therefore the SoftDevice support a calibration strategy that checks the chip temperature at regular intervals, and only run calibration again if temperature has changed above a threshold.