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Original question:

TPS22811: how to proper enable the controller from a microcontroller

TPS22811: Simple Load Switch

Aria10
Prodigy 110 points
Part Number: TPS22811

Tool/software:

I want a simple load switch application in which I turn on and off the 12V power supply based on a push switch input.
I want the fastest slew rate /

  • Can I leave the PG/ PGTH/ DVDT pins floating?
  • I have connected EN/UVLO pin directly to the output of a MCU, but unsure what to do with the *EN/OVLO pin? Apparently I can't leave it floating?

  • 0
    TI__Mastermind 31105 points

    Hi Aria,

    Aria10 said:
    Can I leave the PG/ PGTH/ DVDT pins floating?

    You can leave PG floating. PGTH can be connected to GND. DVDT can be left floating if you don't have big caps at output. dvdt helps in controlling inrush current so if there is high output caps, you need dvdt pin to reduce the inrush current. 

    Aria10 said:
    I have connected EN/UVLO pin directly to the output of a MCU, but unsure what to do with the *EN/OVLO pin? Apparently I can't leave it floating?

    OVLO should be connected to GND if you don't need Overvoltage protection.

    Best Regards,
    Arush