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Create an Inverting Power Supply From a Step-Down Regulator
Understand how to design an inverting power supply using a DC/DC converter
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By
David G. Daniels, Texas Instruments
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Power Management DesignLine
(11/02/2009 7:21 AM EST)
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When you need to generate a negative output voltage from a positive input voltage, you can use the buck (step down) regulator that is already available in your system. This step-by-step procedure helps guide the user through designing an inverting power supply using a wide-input-voltage family of SWIFT DC/DC converters. By applying duality to a buck regulator, it allows the user to derive an inverting (buck-boost) regulator as shown in the References at the end of this application report.
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