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Ultra-small 4-A buck-boost converter [TPS630250]

The TPS630250 buck-boost converter with 4-A switches supports a wide input voltage range of 2.3 V to 5.5 V and can discharge lithium batteries down to 2.5 V or lower, while maintaining excellent light load efficiency and a quiescent current of 35 uA. The 2.5-MHz device can achieve a complete DC/DC buck-boost solution of 33mm2 -- less than half the size achieved with existing 4-A products.