FAN5091

www.fairchildsemi.com FAN5091 Two Slice Interleaved Synchronous Buck Converter Features Programmable output from 1.10V to 1.85V in 25mV steps using an integrated 5-bit DAC Two interleaved synchronous slices for maximum performance 100nsec response time Built-in current sharing between slices Remote sense Programmable Active Droop (Voltage Positioning) Programmable frequency from 200KHz to 2MHz Adaptive delay gate switching Integrated high-current gate drivers Integrated Power Good, OV, UV, Enable/Soft Start functions Drives N-channel MOSFETs Operation optimized for 5V operation High efficiency mode (E*) at light load Overcurrent protection using MOSFET sensing 24 pin TSSOP package Description 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 sharing 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 output 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 converter to program the output voltage from 1.10V to 1.85V in 25mV ste...