MC33063 Buck Regulator Simulation using Cadence Orcad Capture+pSpice

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  • February 11, 2013 at 8:46 am #16294
    alirezaei
    Guest

    I have made a SPICE simulation for converting +12 DC to +5 volts using MC33063
    from ONsemi; Cadence Orcad Capture generates the netlist well but
    pSpice calculations do not converge. Is there anyone to help the
    simulation converge, please? The whole project is attached.

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    February 12, 2013 at 9:07 am #16389
    Cribald
    Participant
    Credits: 222

    Hi,

    models and schematic are OK. you only have to fix some parameters. Check Skip the initial transient bias point calculation (SKIPBP), then run 20ms with a maximum step size of 1 us. It will work fine.Below the simulation on 10 and 100 Ohm.

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