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The Texas Instruments TPS63900 is a high-efficiency synchronous buck-boost converter with an extremely low quiescent current (75 nA typical) in a 10-pin, 2.5-mm × 2.5-mm, 0.5-mm pitch WSON package.
The TPS63900EVM uses the TPS63900 integrated circuit (IC) and operates with an input voltage up to 5.5 V.