One problem with writing an Application Note on PCB layout is that the people who read it are usually not the ones who are going to use it. Even if the designer has struggled through electromagnetic fields, EMC, EMI, board parasitics, transmission line effects, grounding, etc., he will in all probability then go on with his primary design task, leaving the layout to the CAD/layout person. Unfortunately, especially when it comes to switching regulators, it is not enough to be concerned with just basic routing/connectivity and mechanical issues.
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National Application Note
AN-1120: Application Note 1120 LM2675-5.0EVAL 1A Step-Down High-Efficiency SIMPLE SWITCHER Evaluation Board
National Application Note
AN-1157: Application Note 1157 Positive to Negative Buck-Boost Converter Using LM267X SIMPLE SWITCHER® Regulators
National Application Note
AN-1229: Application Note 1229 SIMPLE SWITCHER PCB Layout Guidelines
National Application Note
AN-1095: Application Note 1095 Design of Isolated Converters Using Simple Switchers
National Application Note
AN-776: Application Note 776 20 Watt Simple Switcher Forward Converter
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