The AS1331 provides continuous transitions between buck and boost mode, suiting it for dual- or triple-cell alkaline/NiCd/NiMH as well as single cell Li-ion battery applications. It offers an adjustable output voltage range from 2.5 to 3.3 V from an input voltage range of 1.8 to 5.5 V.
The buck-boost converter uses a four-switch architecture to deliver 90% efficiencies, at light loads, the quiescent current is reduced to 22 µA. It also offers battery-monitoring circuitry that can be used for power-OK signaling. ($1.29 ea/1,000 — available now.)
austriamicrosystems , Unterpremstaetten , Austria
Rene Wutte 011-43-(0)-3136-500-5653
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