Three-phase, step-down dc/dc controller targets high current rails

摘要

Linear Technology's new three-phase, single-output LTC3829 synchronous step-down dc/dc controller features efficiency as high as 95%, PolyPhase operation, differential output-voltage sensing, and integrated PLL (phase-locked-loop) clock synchronization. You can parallel as many as six phases and clock them out of phase to minimize input- and output-filtering requirements for applications requiring currents as high as 150A.rnThe differential amplifier provides true remote output-voltage sensing of both the positive and the negative terminals, enabling high-accuracy regulation independent of IR losses in trace runs, vias, and interconnects. Applications include high-current ASIC and FPGA supplies, power-distribution buses, and high-power audio amplifiers.