Why has it been the leading-edge SPICE program for power supply designers?
In my opinion, because Larry Meares, having designed power supplies, was aware of the pitfalls of simulating switching-mode power supplies from the beginning and developed the features and set the defaults so the program worked with these circuits. Intusoft was also first to develop many model types needed to simulate power supplies. What I found is that IsSpice worked with my switching-mode power supply circuits while other SPICE programs blew up or took much longer to get any results — and when I needed a model type for a power supply component, Intusoft usually had one. Intusoft has continued to look after the needs of the switching-mode power supply designers as shown by their current Power Supply Designer package. This package consists of ICAP, the integrated SPICE simulation program, Magnetics Designer, a magnetics design program that generates the magnetic design and a SPICE model, and Power Designer Library, a library of power electronic component models that augments the exte
