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LM3525 Maximum output capacitance and spice model

ChangedDaily
Prodigy 70 points

Other Parts Discussed in Thread: LM3525

Hi,

I am thinking about using the LM3525 in a USB device to switch on/off a part of my circuit. The circuit in question has a large input capacitance (~220uF). I couldn't find anywhere on the data sheet for the LM3525 a maximum value for output capacitance. Do I have to work out the energy based on the Rdson vs Vout?

Is there a spice model available?

Thanks

  • 0
    TI__Mastermind 42795 points

    I could not find the PSPICE model online but will ask if one is in work. Since this is a fairly old load switch, there may not be a model available.

    With larger load capacitance values, the switch may go into current limit at start up which should be fine. Extremely large load capacitance may cause the switch to hit thermal overload during start up but I don't think that should be an issue with only 220uF.

    I would recommend going with a newer device such as TPS2051CDGN or "DBV". These have PSPICE models online and have a better current limit characteristic than the old devices.