DCDC Circuit configuration no. 1 for QFAA QFN48

[xusbzi]

Hello,

I am developing a board using the nRF52840 QFN48 and powering it using a 3.7V single cell LiPo battery. Since the battery voltage is stepped down to 3.3V via an external DC-DC converter (XCL210D331GR-G) and I plan on using the internal LDO on the nRF, do I still require L3 L4 C14 and C15? What about C11 or C12? I am trying to limit the size of my design as much as possible.

Any help would be greatly appreciated! Thanks!

-Paul

[mathiaso]

Hi, Paul.

And thank you for your explanation, JT898.

What JT898 writes is mostly correct. Just keep C14 as well.

Graphic explanations of the different regulator configurations are found in the Regulator configuration examples section of the datasheet.

Best regards,
Mathias