Other Parts Discussed in Thread: TPS65216
Dear Champs,
My customer is bring-up AM4372 in their custom board and it was powered by PMIC(TPS65216). They found every power rails of TPS65216 were very unstable during several dozens of seconds and then to be stable.
After the power outputs of TPS65216 were stable, there is no issue to connect JTAG and they are assuming AM4372 can be boot.
These unstable power output of TPS65216 were not observed when one of 1.1V VDD_CORE or 1.8V or 3.3V power rail was not connected, and it would be very helpful if you can guide me where should be checked to resolve this issue.
The each power rail was showed as below during initial dozens of second.
1) LDO1, 0~1.8V, with 565ms period
2) DCDC1, 0~1.1V, with 565ms period
3) DCDC2, 0~1.1V, with 565ms period
4) DCDC3, 0~1.35V, with 565ms period
5) DCDC4, 2.6~3.3V, with 565ms period
Thanks and Best Regards,
SI.