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Synchronous Buck Reference Design (PMP369)

This reference design is synchronous buck-boost converter that can deliver up to 3.8 A of continuous current at -5 V from a 5 V input. This topology uses a synchronous buck controller (TPS5103) referenced to the negative output rail. The synchronous MOSFETs allow this design to achieve a peak efficiency of 88%. In addition, the TPS5103 provides a soft-start function and over-current protection.


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