How to Use WEBENCH Tools
Just four easy steps to design a power supply!

• Choose a part based on your specifications
• Create a design including passive components and important calculated operating values
• Analyze a design using the WEBENCH electrical simulaton and thermal simulation
• Build it and take your virtual design to the real world.

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The WEBENCH environment provides the end-to-end design and prototyping tools you need to create power supplies or DC-DC Converters that meet your design requirements. WEBENCH tools enable designers to solve switching power supply design problems before a prototype is built, alleviating the time and trouble associated with traditional design methods. The WEBENCH toolset can also be used as a device selection tool to find the best voltage regulator, switching regulator, switched capacitor, mosfet controller, or LDO for your application or power supply solution. Many new parts are fully supported such as the NEW! LM20xxx Family of Full-Featured PowerWise® Synchronous Buck Regulators.

WEBENCH Electrical Simulation
After entering your design specifications, the circuit calculator displays the best power IC options, plus recommendations for the surrounding components. Designs will be suggested using buck (step-down), boost (step-up), flyback, inverting, sepic (buck/boost), ldo/linear, or switched-capacitor topologies, depending on your specifications. Switching regulators with voltage mode, current mode, emulated current mode, or hysteretic control methods are supported in both integrated switch voltage regulator or separate mosfet DC-DC controller solutions.

Utilizing SPICE models, WEBENCH provides various test measurements for you to simulate your power supply circuit, such as bode plots, steady state, input transient, load transient, and startup simulations. Through probe points on a schematic display, you can examine waveforms, change component values, and view a history of simulation results to fine-tune your design.

WebTHERM™ Thermal Simulation
Use this tool to simulate the thermal behavior of an electronic printed circuit board (PCB). Define environmental conditions like ambient temperature, board specifications, air flow, and optional heat sink to solve thermal problems customized to your design requirements. WebTHERM then plots a color map of the PCB, allowing you to identify any potentially hot spots on your board.

Build It Features
WEBENCH tools provide complete documentation: BOM, schematic, design specifications, and simulation results. WEBENCH tools also give you options to order your custom power supply kit, standard evaluation kit, samples, or parts for purchasing.

Switchers Made Simple®
Downloadable software that enables you to develop a complete power supply design on your local PC. This covers SIMPLE SWITCHER® devices and includes discrete component and manufacturer selection.

• SMS 6.3 (for LM2852Y)
• SMS 6.24 (for LM2698, LM267x, LM259x and LM259xHV buck regulators; and LM258x and LM2577 boost & flyback regulators)
• SMS 4.3 (for LM258X & LM259X)
• SMS 3.3 (for LM257X)