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INA199-Q1: Does it have POR to return to normal operation even after voltage drop?

Yoshikazu Kawasaki
Expert 3510 points
Part Number: INA199-Q1

Hello,

My customer is wondering if it might have POR to return to normal operation once the input voltage drops by cranking or something.  For example, even if V+ changes like 5V -> 3V -> 5V or 5V -> 2V -> 5V, does INA199-Q1 work correctly without changing 5V -> 0V -> 5V?  The datasheet doesn't say about it, so I think it works even if the input drops to any voltage if it returns to normal voltage, but if it has POR, would you please tell me min voltage?

It might be better to ask for all the INAxxx devices to avoid asking the same question for the other INAxxx devices though.

Best Regards,

Yoshikazu Kawasaki

  • 0
    TI__Mastermind 24125 points

    Hello Yoshikazu,

    Thanks for reaching out on the forum.  The device should recover without a full reset regardless of whether it leaves the linear operating region or stays within it as your customer does.  Despite the device being able to recover, the output will temporarily show signs that the supply drooped.  This transient on the output relates to the device PSRR.

    Below is a simulation illustrating something similar to what you might see.