You can download the latest official version of LTspice for Windows and macOS directly from Analog Devices. What is LTspice 17.1?
Previously, evaluating loop gain in switching regulators required complex workarounds using .measure commands. The new .fra directive simplifies this into a single component and command. 2. Improved File Architecture ltspice 17.1 beta download
The "17.1 beta" phase ended in early 2023. Most users looking for the "17.1 beta" should instead download the latest stable release (currently succeeded by LTspice 24 in some regions), which includes all the beta features in a more polished form. You can download the latest official version of
LTspice 17.1 represents a major shift in the evolution of the world's most popular free SPICE simulator. While originally introduced as a beta release, it has since transitioned to the official stable version, succeeding the long-standing LTspice XVII. The new
Library files, symbols, and examples are now stored in %LOCALAPPDATA% (e.g., C:\Users\[User]\AppData\Local\LTspice\ ) instead of the "My Documents" folder.
You can install 17.1 alongside LTspice XVII without overwriting the older version, allowing you to test new features without breaking existing workflows. 3. Performance Boosts Version Specific Release Notes - FAQs/Docs - LTspice
LTspice 17.1 was a significant upgrade designed to modernize the simulator's core. Unlike its predecessor, LTspice XVII, this version dropped the Roman numeral naming convention and introduced several internal architectural changes.