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TPS798-Q1: About Low-Voltage Tracking.

watanabe
Expert 1740 points
Part Number: TPS798-Q1

Hi Team,

Q1.Does Low-Voltage Tracking work when the input voltage drops below the output voltage?

(Datasheet Page 12  7.4.1 Low-Voltage Tracking)

Best Regards,

Watanabe

  • 0
    Expert 1740 points
    Hi Team,

    It is an additional question.

    When the input voltage becomes lower than the output voltage,
    Will regulation continue?

    Example: Vin = 11 V Vout = 13.3 V

    Best Regards,
  • 0 in reply to watanabe
    TI__Guru 55940 points
    Hi Watanabe,

    When Vin is less than the set output voltage, the LDO will be in dropout. While in dropout the LDO does not have enough headroom (Vin - Vout) to regulate the output voltage. The output will follow (track) the input voltage minus a small voltage drop caused by the load current over the switch resistance.

    Very Respectfully,
    Ryan