DC/DC to supply nRF21540

[Akash Patel]

Hello,

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 Patel

[ketiljo]

Hi Akash

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'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.

cheers,

Ketil