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LM25066A: Datasheet mentions "Pull the SMBA pin low after the input voltage has exceeded its POR threshold.."

Trushal Alshi
Prodigy 50 points
Part Number: LM25066A
Other Parts Discussed in Thread: LM25066,

I am not able to understand intended meaning of statement "The LM25066 will pull the SMBA pin low after the input voltage has exceeded its POR threshold to indicate that the volatile memory and device settings are in their default state." on page 18 of LM25066A datasheet. Is not it supposed to be a desirable condition  and should not be a fault ? Or it is related to Fault Timer. Could not simulate and check as do not have Spice model of LM25066A. 

  • +1
    TI__Mastermind 30915 points

    Thanks for reaching out. 

    During power-up of LM25066, the SMBA# will be low. This is an expected behavior. After every the successful start-up, it is required to send the CLEAR_FAULTS (03h) command. 

    Please click on "This resolved my issue" if this post answers your query.