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Boost 3.3 Volt to 5 Volt With Tiny Audio Amplifier

Boost 3.3 Volt to 5 Volt With Tiny Audio Amplifier

This charge-pump circuit quietly converts a3.3V source to5V at500 mA (figures1 and2). Nationals (www.national.com) LM4871LD power amplifier makes this design idea both possible and practical, thanks to its low output resistance, low cost, components.

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