FAN5098

www.fairchildsemi.com FAN5098 Two Phase Interleaved Synchronous Buck Converter for AMD® Hammer™ Features Programmable output from 800mV to 1.550V in 25mV steps using an integrated 5-bit DAC Two interleaved synchronous phases for maximum performance 100nsec transient response time Built-in current sharing between phases Remote sense Programmable Active Droop (Voltage Positioning) Programmable switching frequency from 100KHz to 1MHz per phase 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 12V operation High efficiency mode (E*) at light load Overcurrent protection using MOSFET sensing 24 pin TSSOP package Description The FAN5098 is a synchronous two-phase DC-DC controller IC which provides a highly accurate, programmable output voltage for the AMD® Hammer™ processor. Two interleaved synchronous buck regulator phases 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 FAN5098 features Programmable Active Droop for 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 FAN5098 uses a 5-bit D/A converter to program the output voltage from 800mV to 1.550V in 25mV steps...