Hello TI experts,
We are using LP875640RNFTQ1 PMIC for the voltage and current requirement fulfillment in our design. We are very close to the production and doing thermal validation for the same.
We are facing some strange behavior from the PMIC at 80C ambient in thermal chamber. After some time when PMIC temperature is around 100C, some of the Buck outputs suddenly stopped working.
This is random, any of the Buck out of 4 or GPIO will be low and there is no request for the same from the Host side. Here are the details of the design.
Input voltage 3.3V
Buck 0 :- 1.1V @2A current (max)
Buck 1 :- 1.1V @1.5A current (max)
Buck 2 :- 1.07V @2.5A current (max)
Buck 3 :- 1.8V @ 1.5A current (max)
Please suggest us where and how to debug?
Snap of the design for your reference.