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)?

[shahid Sultan]

Thank you for your response, 

I have one more query regarding the power supplies, as given below.

Can we use the internal DC/DC converter for an Audio BLE application?   

What is the efficiency of the internal DC/DC converter? 

[mathiaso]

Hi, Shahid.

shahid Sultan said:

Can we use the internal DC/DC converter for an Audio BLE application?

The main difference between using internal DC/DC vs. LDO is the current consumption. See, e.g., the radio current consumption.

shahid Sultan said:

What is the efficiency of the internal DC/DC converter?

This isn't publicly documented, but again, see the differences in current consumption between DC/DC and LDO mode.

Best regards,
Mathias