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LM63625-Q1: /RESET at over current

Shinji Tsuji
Genius 14179 points
Part Number: LM63625-Q1

Hi team,

Could you advice if /RESER pin goes Low after tdg time when it hits over current (Ios)?

When load current exceed Isc, it limits the current to 20% of Iomax after tdg time and then /RESET goes Low?

Could you advice how /RESET pin behaves in over current condition?

regards,

  • 0
    TI__Guru 73545 points

    Hello

    The RESET flag monitors the FB voltage.  Any event that causes the FB voltage to outside of the

    prescribed limits will cause the RESET flag to assert.

    If a heavy load pulls the output voltage out of regulation, the the RESET flag will assert.

    Thanks

  • 0 in reply to Frank De Stasi
    TI__Genius 14179 points

    Hi Frank-san,

    Thank you for the clarification.

    I would like to double confirm that the "current limit" in datasheet page17 (8.3.5 /RESET Flag Output) means the 

    Output voltage drop caused by the current limit forces /RESER pin to Low when Vout decrease to Vreset_Low, correct?

    "This open-drain output goes low under fault
    conditions, such as current limit and thermal shutdown, as well as during normal start-up."

    regards,

  • 0 in reply to Shinji Tsuji
    TI__Guru 73545 points

    Hello

    Yes, you are correct.  A heavy load will cause current limit and the output will fall out of regulation

    and the RESET flag will go low.

    Thanks