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Multirail Power Supply Design for Successful Application Boards—Part 2: Layout Tips and Tricks

Introduction: An Engineer’s Challenges in Evolving Times

Power supply design can be broken down into three main stages: (a) design strategy and IC choice, (b) schematic design, simulation, and testing, and (c) placement and routing. Investing time into the (a) design and (b) simulation stages can prove the efficacy of your design concept, but the real test requires putting it all together and testing it on the benchtop. In this article, we’re going to skip to step (c), as there are a significant number of resources that cover Analog Devices’ simulation and design power tools, all free to download, such as LTpowerPlanner® , LTpowerCad® , LTspice® , and LTpowerPlay® . Part 1 of this series covered (a) strategy.

This article is the second of a 2-part series that addresses issues sometimes overlooked when designing multirail power supplies. Part 1 focused on the strategy and topology, while this article focuses of the specifics of power budgeting and board layout. As many application boards require a number of power rails, this 2-part series examines a multisupply board solution. The goal is to achieve a quality initial design with.

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Niloy Banerjee

A generic movie-buff, passionate and professional with print journalism, serving editorial verticals on Technical and B2B segments, crude rover and writer on business happenings, spare time playing physical and digital forms of games; a love with philosophy is perennial as trying to archive pebbles from the ocean of literature. Lastly, a connoisseur in making and eating palatable cuisines.

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