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.

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

Applications

• VRM/VRD for 64-Bit Athlon™ and Opteron™ CPU’s

• VRM/VRD for Advanced CPU’s

• Programmable step-down power supply