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FAN5071

Fairchild Semiconductor
Part Number FAN5071
Manufacturer Fairchild Semiconductor
Description High Performance Programmable Synchronous DC-DC Controller
Published Mar 30, 2005
Detailed Description www.fairchildsemi.com FAN5071 High Performance Programmable Synchronous DC-DC Controller for Multi-Voltage Platforms Fe...
Datasheet PDF File FAN5071 PDF File

FAN5071
FAN5071

Overview
www.
fairchildsemi.
com FAN5071 High Performance Programmable Synchronous DC-DC Controller for Multi-Voltage Platforms Features • Output programmable in 25mV steps from 1.
05V to 1.
825V using a dynamically programmable integrated 5-bit DAC • Controls adjustable linears for Vclock (2.
5V), Vnorthbridge (1.
8V) or Vagp (selectable 1.
5V/3.
3V), and Vadj (1.
2V nominal) • Remote sense • Programmable Active Droop™ up to 200mV • Drives N-Channel MOSFETs • Overcurrent protection using MOSFET sensing • Overvoltage protection including startup • 85% efficiency typical at full load • Integrated Power Good and Enable/Soft Start functions • Linears start instantly • Meets Intel VRM8.
5 specifications using minimum number of external components • 24 pin SOIC package Description The FAN5071 is a synchronous mode DC-DC controller IC which provides a highly accurate, programmable set of output voltages for multi-voltage platforms such as the Intel Pentium III, and provides a complete solution for all Intel VRM8.
5 CPU applications, and for other high-performance processors.
The FAN5071 features remote voltage sensing, independently adjustable current limit, and a proprietary wide-range Programmable Active Droop™ for optimal converter transient response and VRM8.
5 compliance.
The FAN5071 uses a 5-bit D/A converter to dynamically program the output voltage during operation from 1.
05V to 1.
825V in 25mV steps.
The FAN5071 uses a high level of integration to deliver load currents in excess of 28A from a 5V source with minimal external circuitry.
Synchronous-mode operation offers optimum efficiency over the entire specified output voltage range.
An on-board precision low TC reference achieves 0.
8% voltage regulation without expensive external components.
The FAN5071 includes linear regulator controllers for Vclock (2.
5V),Vnorthbridge (1.
8V) or Vagp (selectable 1.
5V/3.
3V), and Vadjustable (1.
2V nominal) each adjustable with an external divider.
The FAN5071 also offers integrated functions including ...


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