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FAN5066 Datasheet

  • FAN5066

  • Ultra Low Voltage Synchronous DC-DC Controller

  • 18頁

  • FAIRCHILD

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www.fairchildsemi.com
FAN5066
Ultra Low Voltage Synchronous DC-DC Controller
Features
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Output adjustable from 400mV to 3.5V
Synchronous Recti鏗乧ation
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 ef鏗乧iency over
the entire output voltage range, and the internal oscillator
can be programmed from 80KHz to 1MHz for additional
鏗俥xibility 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
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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
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+
+5V
5
4
OSC
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+
13
12
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+
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+
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.

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