I now investigated the PMIC a bit. It's a Renesas DA9091 but unfortunately the datasheet does not seem to be publicly available.
But looking at the board we can see that it includes eight buck regulator channels. With the main one (for CPU core?) having four inductors and/or synchronous switches for high current delivering capacity.
In the absence of datasheet and/or RPi 5 schematics, it is still possible to measure the voltage on the output capacitors of these bucks. I get this (everything w.r.t. ground of course):
![Image]()
Would anyone with a functioning RPi5 be kind and try to measure this as well, for comparison?
In any case it seems that the PMIC on my board is working.
But looking at the board we can see that it includes eight buck regulator channels. With the main one (for CPU core?) having four inductors and/or synchronous switches for high current delivering capacity.
In the absence of datasheet and/or RPi 5 schematics, it is still possible to measure the voltage on the output capacitors of these bucks. I get this (everything w.r.t. ground of course):
Would anyone with a functioning RPi5 be kind and try to measure this as well, for comparison?
In any case it seems that the PMIC on my board is working.
Statistics: Posted by sm6vfz — Tue Jul 30, 2024 11:44 am