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TPL5100: Observing wrong timer Interval

Part Number: TPL5100

Dear Team,

We are configuring TPL5100 to wakeup the MCU from deep sleep. Before going to deep sleep the TPL5100 will be configured for 64 seconds (D2-0, D1-1, D0-0) using GPIOs from MCU.

The sequence is given below:

  • PGOOD -> Low
  • TPL5100_VDD --> high (GPIO from MCU)
  • Configuring D2,D1,D0 as mentioned above
  • PGOOD -> High
  • MCU goes to deep sleep

The issue is that for some devices the timer expiry is happening at exact 64 seconds, but for some others the timer interval is varying from 65 to 70 seconds. Why would it behave differently for different devices (same binary) ?

Best regards,

Luke