A LTC1709-7-based, dual phase mobile VRM is described. It achieves higher efficiency, smaller size and lower solution cost.
CPU power supply
The increasing demand for computing power in notebook computers has significantly increased CPU clock frequencies and supply currents. Forthcoming mobile CPUs call for core currents as high as 25A to handle sophisticated computing tasks. Traditional single phase solutions have difficulty delivering such a high current. When the CPU supply voltage (0.7V to 1.8V) is converted directly from a high voltage (21V max) adapter input, single phase MOSFET drivers ...