nrf52832 has two power mode.LDO mode and Switching power mode.To use Switching power mode will need to add Inductor between the DEC4 pin and DCC pin, and use software to change mode.
in softdevice :
It can save 5~6 uA around 17% of current on ble_template project
Ref:
1. LDO vs Switching power
2. nRF52 Online Power Profiler
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