[FAQ] AM62L ( AM62L32 , AM62L31 ) Design Recommendations / Custom board hardware design – Queries regarding power architecture including PMIC

Hi Board designers

Input regarding selection of PMIC:

The recommend PMIC(s) on the product folder or used on the SK or EVM schematics has been designed considering the power sequencing, supply rail output slew, nRSTOUT (reset output) delay output from PMIC connected to MCU_PORz after all the supplies ramp for clock to be stable and the sizing of the supply rails based on the processor worst case current draw.

When choosing an alternate non-TI PMIC, the recommendation for custom board designers is to review the relevant collaterals including the data sheet and Maximum Current Ratings document and follow the requirements/recommendations. The recommendation is to review the slew rate requirements, Power-up and power-down sequence sections of the data sheet and confirm the non-TI PMIC based power architecture follows the recommendation.

An important point to note is the processor does not support dynamic scaling of the core voltage or the analog supplies.

Inputs regarding supply decay

Refer below FAQ

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1485094/faq-am62a7-power-rails-decay-note-in-latest-datasheet/5703704#5703704

I have placed the note in both sections because it applies to both power-up and power-down. The power-up sequence should not begin until all power rails are below 300mV, and the power-down sequence is not complete until all power rails are below 300mV.

Regards,

Sreenivasa

HI Board designers, 

Inputs on power supply sizing:

Using Maximum Current Ratings application note vs Power Estimation Tool PET 

The max current app note is representing the current draw for a group of rails. Please note that it is not expected for this current to necessarily be replicated in the power estimation tool. The PET will tend to show more average use case power while the max current app note is intended to be used for power supply sizing as it will allow for the max transient on these groups with some margin. The PET should not be used for power supply sizing.

Regards,

Sreenivasa