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Question of Load Switches

Takahiro Nishizawa
Genius 5575 points
Other Parts Discussed in Thread: TPS27081A, TPS27082L, TPS22914

I have questions about Load Switches.

  ●TPS22914B/C

    ・Please tell me quiescent current of this IC.

    ・Does this IC have reverse current protection , over current protection and thermal shutdown?

    ・ When  this IC have short circuit between Vout and GND, does this IC catch fire?

●TPS27081A 

   

    ・Please tell me quiescent current of this IC.

    ・Does this IC have reverse current protection , over current protection and thermal shutdown?

    ・ When  this IC have short circuit between Vout and GND, does this IC catch fire?

●TPS27082L

    ・Please tell me quiescent current of this IC.

    ・Does this IC have reverse current protection , over current protection and thermal shutdown?

    ・ When  this IC have short circuit between Vout and GND, does this IC catch fire?

  • 0
    TI__Mastermind 24975 points
    Hello Nishizawa-san,

    I can address your questions about the TPS27081/2, but I will let the expert for the TPS22914 answer those questions:

    TPS27081A
    -Leakage currents for the device are described in the 'OFF-TIME CHARACTERISTICS' section of the electrical charicteristics
    -This IC does not have reverse current protection, over current protection or thermal shutdown. The device is essentially an NFET controlled PFET.
    -If the output get shorted to ground and the device sees current in excess of 3A DC (absolute maximum specification) or the junction temperature exceeds 150C based on thermal characteristics, the device may fail.

    TPS27082L
    -Leakage currents for the device are described in the 'OFF-TIME CHARACTERISTICS' section of the electrical charicteristics
    -This IC does not have reverse current protection, over current protection or thermal shutdown. The device is essentially an NFET controlled PFET, but has additional circuitry that the TPS27081A does not have - additional OFF isolation circuitry that prevents the PMOS from turning ON in applications that may have fast transients.
    -If the output get shorted to ground and the device sees current in excess of 3A DC (absolute maximum specification) or the junction temperature exceeds 150C based on thermal characteristics, the device may fail.

    Best,
    Michael
  • 0
    TI__Prodigy 70 points

    Hello Nishizawa-san,

    In mirroring Michael’s format for the response of the TPS22914, please see below:

    TPS22914

    1. The Quiescent current of this IC is specified as having a typical value of 7.7uA at Vin=3.3V, located in Section 8.5, Electrical Characteristics of the Datasheet.
    2. The TPS22914B/C does not implement reverse current protection, over current protection, or thermal shutdown.
    3. If the output is shorted to ground and the device sees an excess of 2A DC (ABS MAX Rating), or the junction temperature exceeds 125C based on thermal characteristics, the device may fail. Information is found in Section 8.1, Absolute Maximum Ratings on the Datasheet.

     Regards,


    Daniel Foncannon