https://devzone.nordicsemi.com/f/nordic-q-a/79592/using-a-switching-regulator-to-step-down-voltage-from-21-6v-to-3-3v-to-power-nrf52840Hi, I am developing a PCB with the nrf52840 chip. The chip is implemented as described in the datasheet ( Circuit configuration no. 6 for QIAA aQFN73 ), using the files that can be downloaded from the nordic webpage. The chip will act as a centralen-USTelligent Community 13Tue, 14 Sep 2021 11:58:03 GMThttps://devzone.nordicsemi.com/thread/329424?ContentTypeID=1Tue, 14 Sep 2021 11:58:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ad088468-76c3-4128-abdb-3776ea9600e5ketiljo<p>This shouldn&#39;t be a problem. The switching frequency is high enough to be properly filtered. Use a ferrite bead in series with the nRF52840 power supply in case there are high frequency components that&#39;s slipping through.</p> <p>Use the recommended decoupling caps from both regulator and nRF52840 reference schematics and you should be fine.&nbsp;</p><div style="clear:both;"></div>