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TPS659039-Q1: SMPS45 voltage change from 1.06V to 1.175V

Part Number: TPS659039-Q1

After power-up, customer found that the SMPS45 voltage change from 1.06V to 1.175V.

The test waveform could be found as following:

The output voltage is already written in OTP. Why it is change from 1.06V to 1.175V?

  • Hello,

    Today is a Holiday in US and please expect 1-2 days delay in getting the feedback from device expert. In the meantime, can you please check whether customer has accidentally changed the output voltage through software (RANGE and VSEL bits)? Can you ask them  to probe I2C lines ? Also, cab you please provide the  time from start up to this change in output voltage?

    Regards,

    Murthy