Hi all, my team is experiencing some boards have failure of their STUSB4500 sink PD controller. We have not 100% determined the cause yet, but I found that our implementation is only using 0.1uF caps for the VREG 1V2 and VREG 2V7 decoupling. This is way under the datasheet minimum of 0.5uF.
The failure mode we are seeing is that the STUSB4500 does not communicate on USB PD at all after failure. On both failed boards I have received back, VREG 1V2 and VREG 2V7 output ~0V.
My question: is it possible or likely that the 0.1uF decoupling caps are causing or leading to this failure? The STUSB4500 is programmed to negotiate 12V, also. So the operating condition would be to negotiate 5V on plugin, and then negotiate 12V.
Thanks!
