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Preliminary Specification describes products that are not in full production at the time of printing. Specifications are based on design goals and
limited characterization. In the process of final product release, specification. Contact Fairchild Semiconductor for current information.
P
www.fairchildsemi.com
Pentium is a registered trademark of Intel Corporation.
Rev. 0.8.1
Features
¥ Programmable output for Vcore from 1.3V to 3.5V using
an integrated 5-bit DAC
¥ Controls adjustable linears for Vtt (1.5V), and Vclock
(2.5V)
¥ Meets VRM speciTcation with as few as 5 capacitors
¥ Meets 1.550V +40/-70mV over initial tolerance,
temperature and transients
¥ Remote sense
¥ Active Droop
¥ Drives N-Channel MOSFETs
¥ Overcurrent protection using MOSFET sensing
¥ 85% efTciency typical at full load
¥ Integrated Power Good and Enable/Soft Start functions
¥ 20 pin SOIC package
Applications
¥ Power supply for Pentium
¨
II Camino Platform
¥ Power supply for Pentium II Whitney Platform
¥ VRM for Pentium III processor
¥ Programmable multi-output power supply
Description
The FAN5061 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 FAN5061 features remote
voltage sensing, independently adjustable current limit, and
Active Droop for optimal converter transient response. The
FAN5061 uses a 5-bit D/A converter to program the output
voltage from 1.3V to 3.5V. The FAN5061 uses a high level of
integration to deliver load currents in excess of 16A from a 5V
Block Diagram
VID3
VID2
VID1
13
VID0
GNDP
19
18
2
15
20
1
14
-
+
-
+
OSC
1.24V
Reference
Digital
Control
Power
Good
5-Bit
DAC
VID4
8 7 6 5 4
+5V
+12V
PWRGD
-
+
ENABLE/SS
VCC
GNDA
3
LODRV
HIDRV
VCCP
17
VCCA
+5V
16
-
REF
REF
PWRGD,
OCL
PWRGD,
OCL
+3.3V
+1.5V
10
9
+2.5V
12
11
OCL
-
+
VCCP
R
S
+
-
+
FAN5061
High Performanc e Programmable S ync hronous
DC-DC Controller for Multi-Voltage Platforms