Hi,
We have an issue with the TPS65910A31 start-up,
the TPS65910x is used as a PMIC for AM335x and out of 5 custom boards 3
are not working properly. During power up the VRTC voltage is very low at 0.8V.
After some testing and with the help of the below E2E we found that
the problem was related to the capacitor value on VRTC pin.
Even the below E2E mentions that After lots of debugging I found that
if we change capacitor value on VRTC pin to 0.1uF all the boards were working perfectly fine.
e2e.ti.com/.../320847
But as per the TPSxx datasheet, the capacitor value for VTRC should be in
the range of 0.8uF to 2.64uF.
In our case out of 3 boards
1> Board 1 works if we change the VRTC capacitor value from 2.2uF to 0.1uF
2> Board 2 works only if we remove the VRTC capacitor
3> Board 3 doesn't work at all.
Is this some kind of Errata of this device?
Best Regards
Kummi