IRUK3055CQ01
1
Rev. 1.0
06/26/02
www.irf.com
DESCRIPTION
The IRUK3055CQ01 is a complete power management
chipset solution that meets Intel's VRM 9.0 specifica-
tions for CPU power. The chipset consists of the
IRU3055CQ 3-phase PWM IC and matching control
(IRF3704S) and synchronous MOSFETs (IRF3711S).
The IRUK3055CQ01TR chipset simplifies procurement
of power MOSFETs and multi-phase, synchronous PWM
ICs to reduce design time of high current DC-DC con-
verters for CPU power. When used in a 3-phase DC-DC
converter design, the IRUK3055CQ01TR chipset can pro-
vide up to 60A for microprocessor V
CORE
requirements.
Complete VRM 9.0 chipset for a 3-phase Buck con-
verter capable of up to 60A
Optimized chipset for easy design of high current
multiphase DC-DC converters complying with the
VRM 9.0 specification
HEXFET
MOSFETs for the control and synchro-
nous FET socket
FEATURES
POWER MANAGEMENT CHIPSET FOR
3-PHASE VRM 9.0 CONVERTERS
Intel Pentium 4 and AMD K7 CPU Power
Low voltage/high current DC to DC converters
APPLICATIONS
Data Sheet No.94514
CHIPSET CONTENTS
Each IRUK3055CQTR chipset contains:
ORDER INFORMATION
PART #
DESCRIPTION PACKAGE QTY
IRU3055CQ
IRF3704S
IRF3711S
5-Bit Programmable 3-Phase Synchronous PWM IC
20VN Control MOSFET, 9m
V
(Max)
20VN Synchronous MOSFET, 6.5m
V
(Max)
36-Pin QSOP
D
2
Pak
D
2
Pak
1
3
3
PART #
DESCRIPTION STANDARD PACK
IRUK3055CQ01TR
IRUK3055CQ01
VRM 9.0 Power Chipset in Tape and Reel
VRM 9.0 Power Chipset in Bulk
1600
1
Note: Click on the part numbers in the table above to link to individual datasheets. You may also use the part
search engine on www.irf.com to access the datasheets of the individual parts.
2
Rev. 1.0
06/26/02
IRUK3055CQ01
www.irf.com
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
TAC Fax: (310) 252-7903
Visit us at www.irf.com for sales contact information
Data and specifications subject to change without notice. 02/01
TYPICAL APPLICATION CIRCUIT
Figure 1 - Application circuit of a 3-phase Buck converter using the IRUK3055CQ01TR chipset.
V
OUT
= 1.5V @ 60A
Vcc
D 4
Ref
R t
SS
D 3
D 2
D 1
D 0
C o m p
F b
V
CL1
V
CL23
HDrv1
OCSet
LDrv1
PGnd1/
OCGnd
CS1
HDrv2
LDrv2
PGnd2
CS2
HDrv3
LDrv3
PGnd3
CS3
5V
22nF
C12
R 6
27K
C 9
1uF
R 3
47K
C10
0.1uF
V
CH3
V
CH12
C 1
1uF
C 2
0.1uF
C 3
1uF
R 1
12V
Q1
IRF3704S
Q2
IRF3711S
Q3
IRF3704S
Q4
IRF3711S
Q5
IRF3704S
Q6
IRF3711S
L2
C13
L4
C11
R 5
1.5K
L3
C 8
C14
8x 2700uF
1uH
1uH
1uH
IRU3055
C 5
1uF
C 6
6 x 1500uF
R 4
1.5K
R 2
1.5K
1uF
1.5V / 60A
L1
1uH
C 4
1000uF
1uF
1uF
D1
100pF
C 7
(Optional)
2.2K
PDF 
ZIP