LTspice IV Simulation Speed

Discussion in 'Electronics Resources' started by HarwareGuy, Jan 17, 2013.

  1. HarwareGuy

    Thread Starter New Member

    Jan 17, 2013
    The attached LTspice file is taking a very long time to simulate. Please can anyone offer any suggestions to decrease the simulation time?
  2. toffee_pie

    Senior Member

    Oct 31, 2009
    i tried this program and its awful.. so fustrating.
    today was using orcad and pspice, like a whole new world.
  3. tshuck

    Well-Known Member

    Oct 18, 2012
    Not exactly helpful....

    I don't have LTspice on this computer, so I can't open your file, but if you have a lot of components, it will take longer to simulate... that's the name of the game...
    You may want to change the simulation run time like
    this(page 29), it explains how to change the simulation runtime...
  4. toffee_pie

    Senior Member

    Oct 31, 2009
    just saying.

    its not user friendly, looking for parts, placing components etc is ridiculous tbh.
  5. crutschow


    Mar 14, 2008
    Spice simulation time always tends to be long for switching regulators since the loop response is a relatively low frequency compared to the switching frequency. Thus to do 100ms of simulation requires the simulator to do many thousands of complex calculations. Sometimes you just have to start the simulation and then go on a break. ;)

    One way to speed it up is to use a faster computer.