POWER 4-5-6 is the world's only comprehensive power supply design software.

Features
Power-Stage Designer 
Magnetics Designer with core library
Control Loop Designer
Current-Mode and Voltage-Mode Designer and analysis with most advanced & accurate models
Nine power topologies for all power ranges
True transient response for step loads
CCM and DCM operation simulated exactly
Stress and loss analysis for all power components
Fifth-order input filter analysis of stability interaction
Proprietary high-speed simulation outperforms any other approach 
Second-stage LC Filter Designer
Snubber Designer 
Magnetics Proximity Loss Designer
Semiconductor Switching Loss Designer
Micrometals Toroid Designer
Design Process Interface accelerated and enhanced