The LTC3371 configurable dc/dc converters addresses systems requiring multiple low voltage power supplies. The device features four synchronous buck converters, each powered from independent 2.25V to 5.5V inputs, and each configurable to share up to four of eight available 1A power stages. Its buck power stages can be connected in parallel by combining their respective Vin and SW pins and programming the desired configuration on the C1-C3 pins. Up to four adjacent power stages can be combined on a single channel, resulting in eight unique output configurations ranging from a quad 2A buck to a dual 4A buck. A single inductor may be used for each buck regulator, and any unused power stages may be added to one of the high power channels for improved overall efficiency. Additionally, the bucks are phased in 90° steps to reduce noise and input ripple, have forward and reverse current limiting, soft-start to limit inrush current during start-up, and short-circuit protection. Available in 38-pin, 5 mm x 7 mm QFN and TSSOP footprints, pricing starts at $4.15 each/1,000. A datasheet is available at http://cds.linear.com/docs/en/datasheet/3371f.pdf
Linear Technology Corp.