LTspice Overview - LT Spice 4 Design Tool and Simulation Overview

LTspice is a high performance SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators.  Enhancements to SPICE have made simulating switching regulators extremely fast compared to normal SPICE simulators, allowing the user to view waveforms for most switching regulators in just a few minutes. Included in the download are LTspice, Macro Models for 80% of switching regulators, over 200 op amp models, as well as resistors, transistors and MOSFET models.