Follow the recommendations listed
below:
- The power requirement for
each supply rail varies based on the interfaces used and the operating
environment.
- The current draw of processor
supply rails can be estimated using the PET (Power Estimation Tool).
If the outputs from the selected power architecture powers the other
on-board attached (peripheral) devices, the maximum current draw of these
devices needs to be included.
- Verify if the output current
ratings of the selected power architecture including PMIC, DC/DC converters
and LDOs meet the maximum demand of processor and all devices that are
attached. It is recommended to consider some additional margin for design
variances.
- Verify if the recommended
power supply sequence (Power-Up/Power-Down) is being followed. Proper power
supply sequencing in correlation with resets and clocks is recommended. For
the recommended power sequencing requirements, see the Power Supply
Sequencing section of device-specific data sheet.