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TPS62825: Recovery voltage from UVLO

Part Number: TPS62825

Hello Support team,

According to datasheet p4, "Under voltage lock out threshold" is 2.3V as max and "Under voltage lock out hysteresis" is 160mV as typ.
Q1. Is EN voltage level for recovering from under voltage lock out 2.3V+160mV?
Q2. Could you let me know max of "Under voltage lock out hysteresis"?

Best Regards,
Hirokazu Takahashi

  • Hi Hirokazu,

    can you please be more specific on your first question, do you mean the voltage required at the enable pin after an undervoltage event?
    In this case, any voltage above 1V at the enable pin is sufficient for the device after an undervoltage event.

    The maximum value of the UVLO hysteresis is typically in a region, which allows operation down to the minimum specified input voltage of the device.

  • Hello Björn

    I'm sorry, I misunderstood that UVLO will be detected by EN pin voltage. Now, I understand it will be detected at VIN voltage.

    I want to clarify VIN condition recovering from under voltage lock out.

    As My 1st question, let me know the VIN voltage level for recovering from under voltage lock out. Is it 2.3V+160mV?

    Since the maximum value of the UVLO hysteresis is typically in a region as your answer, can the max voltage of recovering from under voltage lock out be defined as 2.3V+160mV also?

    Best Regards,
    Hirokazu Takahashi

  • Hi Hirokazu,

    the max voltage of recovering from UVLO is the minimum operating input voltage of the device, which is 2.4V.

  • Hello Björn

    I guess that 2.4V is defined as Vin@min at recommended operation condition.
    I want to know max of Vin voltage threshold which TPS6282x will be restarted from UVLO lock condition.
    I guss it may be defined as max of "Under voltage lock out threshold" + max of "Under voltage lock out hysteresis" define.
    Is it correct?

    Best Regards,
    Hirokazu

  • Hi Hirokazu,

    the highest possible voltage, required to recover from an UVLO event is ensured to be not greater than 2.4V for those versions of the device, which are specified to work at 2.4V. For those versions of the device which are specified to work at 2.5V or higher, your definition is correct.