Power sequence required for nRF5340 Soc

[shahid Sultan]

I have been reviewing the datasheet of the BLE audio nRF5340. It lists multiple power rails in power section.

Is any power-on sequence required for the SOC.

Also, can we use an LDO or buck converter instead of a PMIC IC (nPM1300)?

[Turbo J]

No, there is only the VDD power rail available. This one is either tied to VDDH or powered from VDDH using internal regulator.

If you tied VDD to VDDH you can use an external converter or LDO for both. See reference circuit No. 2 in the PS as an example.