https://devzone.nordicsemi.com/f/nordic-q-a/78825/dc-dc-to-supply-nrf21540Hello, Is it okay to supply the nRF21540 with a DC/DC or do I need to use an LDO? Are there any performance differences of the nRF21540 when choosing one over the other? Regards, Akash Patelen-USTelligent Community 13Mon, 23 Aug 2021 10:39:40 GMThttps://devzone.nordicsemi.com/thread/326147?ContentTypeID=1Mon, 23 Aug 2021 10:39:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:31820df2-61a8-4f48-94f5-d85748f945b3ketiljo<p>Hi Akash</p> <p>DCDC should be ok as a supply. But as always, make sure the noise is low enough. Power supply noise will show up as spurious around the carrier. It&#39;s hard to give a number for max power supply noise as it depends on the frequency as well. But 100 mV ripple is normally ok.</p> <p></p> <p>cheers,</p> <p>Ketil</p><div style="clear:both;"></div>