Data processing system complexity is growing fast, and the need for intelligent power system management is growing right alongside it. Designers now require better system management capabilities like those offered by the new generation of digital PWM controllers. While these digital controllers can use resistors to configure basic parameters, the immense flexibility of the digital controller is its ability to provide full software control via the PMBus. This white paper describes how engineers can benefit from a digital hybrid controller that combines an analog PWM controller with a PMBus interface.