https://devzone.nordicsemi.com/f/nordic-q-a/48466/nrf52840-efficient-power-management-solutionHi, I have read a lot of posts about using the internal LDO/DCDC converters or using an external switch mode regulator, but haven&#39;t seen any answers I could use. I have a setup with the nRF52840 that continuous uses 1.8mA for reading/writing to differenten-USTelligent Community 13Thu, 13 Jun 2019 14:07:42 GMThttps://devzone.nordicsemi.com/thread/192742?ContentTypeID=1Thu, 13 Jun 2019 14:07:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0a34e184-f14e-4ee5-8bc3-966eb861d56cJared<p>Hi,</p> <p>The internal regulator is the LDO regulator while the external regulator is the DC/DC. The benefit of using the DC/DC regulator is that it&#39;s more efficient than the LDO but the drawback is that it requires extra components (two inductors) and more place. When DCDC is enabled then the nRF will use LDO refresh mode in SYSTEM ON IDLE. It will switch to DCDC refresh once&nbsp;any significant current is drawn from a peripheral. The nRF will switch to DCDC normal from DCDC refresh once the radio is used to prevent any added noise. No other power calculations are&nbsp;available&nbsp; then <a href="https://devzone.nordicsemi.com/nordic/power?Redirected=true">this </a>one.&nbsp;</p> <p>Regards</p> <p>Jared&nbsp;</p><div style="clear:both;"></div>