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FAN5066

Fairchild Semiconductor
Part Number FAN5066
Manufacturer Fairchild Semiconductor
Description Ultra Low Voltage Synchronous DC-DC Controller
Published Mar 30, 2005
Detailed Description www.fairchildsemi.com FAN5066 Ultra Low Voltage Synchronous DC-DC Controller Features • • • • • • • • Output adjustabl...
Datasheet PDF File FAN5066 PDF File

FAN5066
FAN5066

Overview
www.
fairchildsemi.
com FAN5066 Ultra Low Voltage Synchronous DC-DC Controller Features • • • • • • • • Output adjustable from 400mV to 3.
5V Synchronous Rectification Adjustable operation from 80KHz to 1MHz Integrated Power Good and Enable functions Overvoltage protection Overcurrent protection Drives N-channel MOSFETs 20 pin SOIC or TSSOP package Description The FAN5066 is a synchronous mode DC-DC controller IC which provides an adjustable output voltage for ultra-low voltage applications, down to 400mV.
The FAN5066 uses a high level of integration to deliver load currents in excess of 19A from a 5V source with minimal external circuitry.
Synchronous-mode operation offers optimum efficiency over the entire output voltage range, and the internal oscillator can be programmed from 80KHz to 1MHz for additional flexibility in choosing external components.
The FAN5066 also offers integrated functions including a four-bit DAC-controlled reference, Power Good, Output Enable, over-voltage protection and current limiting.
Applications • • • • Power supply DDR SDRAM VTT Power Supply HSTL Power Supply for ASICs Adjustable ultra-low voltage step-down power supply Block Diagram +12V FAN5066 1 – + +5V 5 4 OSC – + 13 12 – + – + DIGITAL CONTROL +5V 7 9 VO CNTRL VREF 16 20 4-BIT DAC 19 18 17 8 1.
24V REFERENCE POWER GOOD 2 3 PWRGD VID2 VID4 VID1 VID3 ENABLE PRELIMINARY INFORMATION describes products that are not in full production at the time of printing.
Specifications are based on design goals REV.
2.
1.
4 11/13/01 and limited characterization.
They may change without notice.
Contact Fairchild Semiconductor for current information.
FAN5066 PRODUCT SPECIFICATION Pin Assignments CEXT ENABLE PWRGD IFB VFB VCCA VCCP VID4 LODRV GNDP 1 2 3 4 5 6 7 8 9 10 20 19 18 17 VREF VID1 VID2 VID3 CNTRL GNDA GNDD VCCQP HIDRV GNDP FAN5066 16 15 14 13 12 11 Pin Definitions Pin Number Pin Name 1 CEXT Pin Function Description Oscillator Capacitor Connection.
Connecting an external...


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