DCDC or LDO

[zwf]

hi all!

     I would like to ask the DCDC and LDO two modes of choice. My product is a watch, it uses the cr2032 battery dropped to 2.5v by an external LDO to 52832 power supply. I learned that DCDC mode can reduce the peak current. So should I use DCDC mode? Does this model have any special requirements for hardware or software? I currently use the default LDO mode, I can be set to DCDC mode directly through the function (sd_power_dcdc_mode_set) at initialization, and do not need to change other hardware and software?

• thanks!

[Turbo J]

The external LDO drops efficiency when using the internal DCDC. NRF chips can work from the CR2032 primary cell directly. Note that DCDC mode requires additional components (inductor) to be present on your board.