LTspice^® Technical Information and Guides

LTspice® is a high performance SPICE simulation software, schematic capture and waveform viewer with enhancements and models for easing the simulation of analog circuits. Below are resources organized to help you get started or perform more advanced LTspice simulations.

Getting Started with LTspice

Your LTspice journey begins here. Learn the fundamentals of this powerful simulation software, from basic navigation to essential functions and computations that will help you analyze and improve your analog circuit design.

Get Up and Running with LTspice

Keyboard Shortcuts

Connecting the Dots

Combining Multiple Model Instances Into One Symbol

Piecewise Linear Functions for Voltage & Current Sources

Generating Triangular & Sawtooth Waveforms

Simple Steps for Simulating Transformers

Copy and Paste Between Schematics

Computing the Average or RMS Value of a Trace

Using the .STEP Command to Perform Repeated Analysis

Simple Idealized Diode

Simple Steps to Import Third-Party Models

Importing & Exporting PWL Data

Basic Steps in Generating a Bode Plot of SMPS

Annotating Schematic & Waveform Plots

Simulating Power Solution Designs using LTspice

LTspice Essentials

Once you’ve mastered the basics of LTspice, you’re ready to go deeper with the resources below. Learn how to use LTspice for more complex simulations by manipulating parameters, pulling in external data, adjusting for noise, and more.

Undocumented Shortcuts

Voltage Controlled Switches

Using Transformers

Modeling Constant Power Loads

AC Analysis Using The Step Command

Integrating Noise Over a Bandwidth

Using .MEAS and .STEP Commands to Calculate Efficiency

Parametric Plots

Importing Third Party Models, Creating Schematic Symbols and Managing Libraries in LTspice^®︎

Plotting a Parameter Against Something Other Than Time (e.g. Resistance)

Using an Intrinsic Symbol for a Third-Party Model

Using Time-Dependent Exponential Sources to Model Transients