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RC5061 Datasheet

  • RC5061

  • High Performance Programmable Synchronous DC-DC Controller f...

  • 18頁(yè)

  • FAIRCHILD

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www.fairchildsemi.com
RC5061
High Performance Programmable Synchronous
DC-DC Controller for Multi-Voltage Platforms
Features
鈥?Programmable output for Vcore from 1.3V to 3.5V using
an integrated 5-bit DAC
鈥?Controls adjustable linears for Vtt (1.5V), and Vclock
(2.5V)
鈥?Meets VRM speci鏗乧ation with as few as 5 capacitors
鈥?Meets 1.550V +40/-70mV over initial tolerance,
temperature and transients
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Remote sense
Active Droop (Voltage Positioning)
Drives N-Channel MOSFETs
Overcurrent protection using MOSFET sensing
85% ef鏗乧iency typical at full load
Integrated Power Good and Enable/Soft Start functions
Applications
鈥?Power supply for Pentium
廬
III Camino Platform
鈥?Power supply for Pentium III Whitney Platform
鈥?VRM for Pentium III processor
鈥?Programmable multi-output power supply
Description
The RC5061 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 Camino,
and provides a complete solution for the Intel Whitney and other
high-performance processors. The RC5061 features remote
voltage sensing, independently adjustable current limit, and
Active Droop for optimal converter transient response. The
RC5061 uses a 5-bit D/A converter to program the output
voltage from 1.3V to 3.5V. The RC5061 uses a high level of
integration to deliver load currents in excess of 16A from a 5V
鈥?20 pin SOIC package
Block Diagram
+3.3V
9
10
VCCP
11
+
-
+
-
+5V
VCCA 17
REF
PWRGD,
OCL
OCL
REF
+12V
PWRGD,
OCL
OSC
-
+
-
+
15
R
S
16
20 VCCP
1 HIDRV
+5V
+1.5V
12
+2.5V
-
+
-
+
Digital
Control
2
VCC
19 LODRV
18
GNDP
5-Bit
DAC
8 7 65 4
VID0 VID2 VID4
VID1 VID3
1.24V
Reference
3
GNDA
13
ENABLE/SS
Power
Good
14
PWRGD
Pentium is a registered trademark of Intel Corporation.
REV. 1.0.0 7/6/00

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