The FAN5091 is a synchronous multi-slice DC-DC controller IC which provides a highly accurate, programmable output voltage for all high-performance processors. Two interleaved synchronous buck regulator slices with built-in current shar-ing operate 180° out of phase to provide the fast transient response needed to satisfy high current applications while minimizing external components. The FAN5091 features remote voltage sensing, and Programmable Active Droop ? for 100nsec converter transient response with minimum out-put capacitance. It has integrated high-current gate drivers, with adaptive delay gate switching, eliminating the need for external drive devices. The FAN5091 uses a 5-bit D/A con-verter to program the output voltage from 1.10V to 1.85V in 25mV steps with an accuracy of 1%. The FAN5091 uses a high level of integration to deliver load currents in excess of 50A from a 5V source with minimal external circuitry. The FAN5091 also offers integrated functions including Power Good, Output Enable/Soft Start, under-volt-age lockout, over-voltage protection, and adjustable current limiting with independent current sense on each slice. It is available in a 24 pin TSSOP package.