EE Product News

DC/DC Converter Delivers One Amp

The LTC3441 buck-boost dc/dc converter is capable of outputting up to 1A with efficiencies up to 95%. Optimizing battery run-time for single cell Li-Ion, multi-cell alkaline, or NiMH batteries, the device operates from an input voltage range of 2.4V to 5.5V. And a unique buck-boost topology allows it to operate above, below and equal to the output voltage with one inductor. Operating frequency is set to 1 MHz and can be synchronized up to 2 MHz. In burst-mode, internal power MOSFETs operate intermittently according to load demands and reduce the quiescent current to 25 µA when there is no load and less than 1µA in shutdown. Additionally, the selectable burst mode is inactive during synchronization or when the SYNC/MODE pin goes low, preventing low frequency ripple from interfering with audio circuitry. LTC3441 comes in a 4 x 3-mm DFN package priced at $3.55 each/1,000. LINEAR TECHNOLOGY CORP., Milpitas, CA. (800) 454-6327.


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