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Original question:

TPS65094: RSMRSTB abnormal while operate at low temperature

TPS65094: TPS650942

Abdelmajid Chouifi
Prodigy 10 points
Part Number: TPS65094 
Hello everyone,
 
For some devices, we found that TPS650942A0 (use for apollo lake) resets at temperatures between 0 and -10 ° C. when we dip PMIC, everything will be fine.

However, when the temperature drops to -25 to -40 ° C, it becomes normal.

Do you have an idea for this problem?
  • 0
    TI__Expert 4155 points
    Abdelmajid,

    The first step would be to read the OFFONSRC, PWR_FAULT_STATUS1, and PWR_FAULT_STATUS2 registers to see what the PMIC is reporting as the cause of the reset.

    If you can't communicate with the device, then you should probe each rail to see if there is anything that looks out of the ordinary with any of them.