Top 10 Best Psu Software of 2026

LTspice, developed by Analog Devices, is a free, high-performance SPICE simulation tool with integrated schematic capture and waveform viewing capabilities. It excels in simulating analog and mixed-signal circuits, particularly power supply units (PSUs) like switching regulators, DC-DC converters, LDOs, and buck/boost topologies. Renowned for its speed, accuracy, and extensive library of manufacturer models, it's an industry standard for PSU design validation and optimization.

PSIM from Powersim Technologies is a specialized simulation software for power electronics, motor drives, and control systems, enabling accurate modeling of power converters, inverters, rectifiers, and PSUs. It features a schematic-driven interface for building complex topologies with built-in libraries of semiconductors, magnetics, and controls. The tool excels in switched-mode power supply simulations, offering fast computation and advanced analysis like thermal modeling and hardware-in-the-loop support.

PLECS, developed by Plexim, is a specialized simulation software for power electronics and electrical drive systems, particularly suited for designing and analyzing power supply units (PSUs), converters, and motor controls. It employs a block-diagram approach similar to Simulink but with a dedicated solver optimized for fast, accurate simulations of switched-mode power supplies using physical modeling techniques. Users can model complex systems including thermal behavior, control loops, and digital controllers, with options for code generation and hardware-in-the-loop testing.

LTpowerCAD is a free desktop software tool from Analog Devices designed specifically for power supply engineers to create, simulate, and optimize DC/DC converter designs using LTpower ICs. It offers schematic entry, circuit simulation, layout generation, thermal analysis, and BOM export, streamlining the design process from concept to manufacturing-ready files. Primarily focused on multiphase buck regulators and other high-performance PSUs, it integrates tightly with Analog Devices' component library.

WEBENCH Power Designer is a free web-based tool from Texas Instruments that streamlines the design of DC-DC converters, AC-DC supplies, and other power management circuits. Users specify input/output parameters, efficiency targets, and constraints, and it automatically selects optimal TI components, simulates performance, and generates schematics, BOMs, and Gerber files. It supports iterative optimization and integration with TI's design ecosystem for rapid prototyping.

PI Expert, from Power Integrations (power.com), is a specialized software suite for designing switch-mode power supplies (PSUs) using their proprietary ICs like InnoSwitch and Hiper families. It automates the selection of components, generates optimized schematics, bills of materials (BOMs), transformer designs, and PCB layouts based on user-input specifications such as output power, voltage, and efficiency targets. The tool also includes simulation capabilities and performance predictions to streamline prototyping and reduce design time.

SIMPLIS is a specialized simulation software for power electronics, particularly switched-mode power supplies (SMPS), offering ultra-fast, accurate analysis using piecewise-linear modeling. It simulates steady-state, transient, and control-loop behaviors with cycle-by-cycle precision, making it ideal for PSU design iteration. Often paired with schematic editors like SIMetrix, it bridges high-level behavioral modeling with detailed SPICE-level verification.

TINA-TI is a free SPICE-based circuit simulation software from Texas Instruments, tailored for designing, simulating, and analyzing analog, digital, and mixed-signal circuits with a strong emphasis on TI components. It supports schematic capture, DC, AC, transient, noise, and Monte Carlo analyses, making it effective for power supply (PSU) design including linear regulators, DC-DC converters, and LDOs. Virtual instruments and post-processing tools allow detailed waveform viewing and optimization, ideal for verifying TI PSU performance before prototyping.

Power Stage Designer is a free web-based tool from Texas Instruments (TI) specifically for designing and optimizing power stages in switch-mode power supplies (SMPS). It allows users to input electrical specifications such as Vin, Vout, Iout, and switching frequency, then automatically selects optimal TI components, calculates losses, efficiency, and thermal performance across topologies like buck, boost, buck-boost, and flyback. The tool generates schematics, BOMs, and design reports, streamlining the prototyping process for DC-DC converters.

OrCAD PSpice Simulator from Cadence is an industry-standard SPICE-based tool for analog, digital, and mixed-signal circuit simulation, widely used in power supply unit (PSU) design. It excels in modeling switching converters, linear regulators, magnetics, and control loops with high accuracy. Integrated with OrCAD Capture for schematic entry and Cadence's PCB tools, it supports a full design workflow from simulation to layout.