FAN5098MTC ,Two Phase Interleaved Synchronous Buck Converter for AMD Hammerfeatures Programmable Active Droop for • Programmable switching frequency from 100KHz to transient ..
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FAN5098MTC-FAN5098MTCX
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
Applications VRM/VRD for 64-Bit Athlon™ and Opteron™ CPU’s VRM/VRD for Advanced CPU’s Programmable step-down power supply
DescriptionThe FAN5098 is a synchronous two-phase DC-DC controller
IC which provides a highly accurate, programmable output
voltage for the AMD
Hammer™ processor. Two inter-
leaved synchronous buck regulator phases with built-in cur-
rent 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 out-
put voltage from 800mV to 1.550V in 25mV steps with an
accuracy of 1%. The FAN5098 uses a high level of integra-
tion to deliver load currents in excess of 50A from a 12V
source with minimal external circuitry.
The FAN5098 also offers integrated functions including
Power Good, Output Enable/Soft Start, under-voltage lock-
out, over-voltage protection, and adjustable current limiting
with independent current sense on each phase. It is available
in a 24 pin TSSOP package.
