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LP38693 EN pin

Atsushi Yamauchi
Genius 4810 points
Other Parts Discussed in Thread: LP38693

I would like to confirm EN pin for LP38693.

The customer wants to have the delay of enable with RC circuit (10kohms/1uF) connecting EN pin.

I think it is no problem.

Is it correct?

Best regards,

Atsushi Yamauchi 

  • 0
    TI__Mastermind 22610 points

    Per the LP38693 datasheet in section 8.3.1 Enable (EN): "... The Enable On/Off threshold has no hysteresis. The voltage signal must rise and fall cleanly, and promptly, through the ON and OFF voltage thresholds..."

    If the rising EN voltage is too slow, the output may chatter (i.e. On-Off-On-etc) for some period of time (10's of milli-secs). Depending on the output capacitance value, and the load current demand, this behavior may, or may not, be noticeable in their application.

    It will be the customers responsibility to ensure  that the device behavior is acceptable in their application.