SC2642 Datasheet | SEMTECH

.. POWER MANAGEMENT Description The SC2642 provides microprocessor core voltage regulation solution with two paralleled PWM channels. Multi-phase buck regulator utilizes the phase-shift timing control to allow interleaved switching of the power switches. This architecture minimizes the core voltage ripple and the input current ripple, which leads to optimized voltage regulator design for power density, transient responses, and the thermal performances. 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 current mode control provides intrinsic phase current matching. 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 plaint 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 pensation technology further enhances the performance of voltage accuracy. The patented bi-Sense TM topology is employed by SC2642. The MOSFET Rds(on) and the output inductor winding resistance are used to generate the phase current information. The bi-Sense TM MOSFET driver plus the SC2642 enables the plete solution. The SC2642 is a multi-platform controller. It conforms to Intel VRM/VRD10.0, VRM9.X, and AMD K-8 (Opteron TM) VID specifications. With very minor changes of the schematic and the layout, the SC2642 based solution can be ported form one platform to another. This greatly benefits the system manufactures for reductions of design cycle and minimize the inventory management. Multi-Platform Two-Phase PWM Controller The VID structure of the SC2642...