Why not use the chip internal DCDC regulator?

joric / nrfmicro

A Pro Micro alternative for wireless keyboards

https://github.com/joric/nrfmicro/wiki

The Unlicense

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Why not use the chip internal DCDC regulator? #62

Closed cirias closed 1 year ago

cirias commented 1 year ago

Hi Joric,

The current design uses an external LDO for the power supply. I wonder if it's possible to use the internal DC/DC regulator for converting USB or battery voltage to 3.3V?

That will need an additional 10uh inductor between DCCH and VDD. Is there any specific reason you didn't do that?

2022-11-23-190443_668x412_scrot

joric commented 1 year ago

there's nRFMicro 1.2, see wiki.