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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