Linear Technology Corporationannounces the LTC3371, a highly-integrated general-purpose power management solution for 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. With eight unique output current configurations, the LTC3371 provides substantial flexibility and ease of reuse across many different applications. The device is suited for a wide variety of multichannel industrial, automotive, communications and distributed power systems.
The LTC3371’s buck power stages can be connected in parallel by simply 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.
The switching regulators may be programmed to operate either in Burst Mode® operation for high efficiency at light loads or in forced continuous PWM mode for lowest noise at light loads. The bucks are phased in 90 degree 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.
The LTC3371 is available from stock in thermally enhanced 38-pin packages: a low profile 5mm x 7mm QFN and TSSOP. E- and I-grades are specified over an operating junction temperature range of -40 to 125 degrees C, and the H-grade features operation from -40 to 150 degrees C. 1000-piece pricing starts at $4.15 each for the E-grade.
source: http://www.powerpulse.net/story.php?storyID=31379
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