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TPS7A8300: EN threshold

Neo.Wang
Intellectual 860 points
Part Number: TPS7A8300

Hi TI experts,

How to understand the EN threshold from datasheet? Given EN sweeps from 0<->3.3V:

1. From 0V-3.3V: once EN rises above 1.1V, the LDO turns on, right?

2. From 3.3V->0V: When will LDO be turned off? Below 1.1V or has to drop to <0.5V? considering EN drops slowly enough.

3. If it's 1.1V in question #2, what's the status between 1.1V->0.5V?

Thanks

Neo

  • 0
    TI__Genius 13315 points

    Hi Neo,

    Yes all TPS7A83 LDOs will enable when Ven>=1.1V and they will all turn off when Ven <=0.5V. 

    Due to process variation there will be some that turn on a little lower than1.1V, and some that will turn off a little higher than 0.5V, but we ensure they will all meet those limits shown in the EC Table. 

  • 0 in reply to Kyle Van Renterghem
    Intellectual 860 points

    Hi Kyle,

    So that means we should never provide any voltage between 0.5V and 1.1V, right? Since the state is undefined between this range?

    Thanks

    Neo

  • 0 in reply to Neo.Wang
    TI__Mastermind 34095 points

    Hi Neo,

    You can provide voltage in this range, however we cannot guarantee the LDO will be disabled or enabled in this voltage range.  Providing voltage in this range is unavoidable as you must turn on or off the LDO, and thus you must slew through this voltage range to do so.  The LDO will not be damaged by seeing a voltage from 0.5V to 1.1V on the EN pin.

    Thanks,

    Stephen