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)?

[Ressa]

There is no official characterization data about specifically audio applications power efficiency, you can use Nordic PPK kit for that purpose by running your application on SoC to see how is the power efficiency. 

Best regards,
Ressa