DESCRIPTION
Multi-phase buck regulator utilizes the phase-shift timing control to allow interleaved switching of the power switches. To satisfy the highly dynamic nature of the modern microprocessors, the SC2642 adopts peak current mode control topology which ensures wide control loop bandwidth and fast transient responses. The maximum ripple frequency is greater than 1MHz. One of the outstanding features of the SC2642 is its voltage regulation accuracy. Not only it provides better than 1% set point accuracy, but also the accuracy to fully complaint with the stringent load line slope specifications mandated by the modern microprocessors.Lossless output current sensing ensures the regulator output voltage is accurately positioned according to the load current condition, and an internal temperature compensation technology further enhances the performance of voltage accuracy. The patented Combi-SenseTM topology is employed by SC2642. The MOSFET Rds(on) and the output inductor winding resistance are used to generate the phase current information.
Semtech Corporation
