The SC2434, a tri-phase, current mode controller is designed to work with Semtech smart synchronous drivers, such as the SC1205, SC1206, and SC1207 to provide the DC/DC converter solution for the most demanding Microprocessor applications. Input current sensing is used to guarantee precision phase to phase current matching using a single sense resistor on the input power line. This topology reduces the power loss and complexity associated with output current sense methods. Multi phase operation allows significant reduction in input/output ripple while enhancing transient response. Two or three phase operation is selectable. The DAC step size and range are programmable with external components thus allowing compliance with new and emerging VID ranges. A novel approach implements active droop to minimize output capacitors during load transients.