Data Sheet No.94514
IRUK3055CQ01
POWER MANAGEMENT CHIPSET FOR
3-PHASE VRM 9.0 CONVERTERS
FEATURES
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
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.
APPLICATIONS
Intel Pentium 4 and AMD K7 CPU Power
Low voltage/high current DC to DC converters
CHIPSET CONTENTS
Each IRUK3055CQTR chipset contains:
PART #
IRU3055CQ
IRF3704S
IRF3711S
DESCRIPTION
5-Bit Programmable 3-Phase Synchronous PWM IC
20VN Control MOSFET, 9mV (Max)
20VN Synchronous MOSFET, 6.5mV (Max)
PACKAGE
36-Pin QSOP
D
2
Pak
D
2
Pak
QTY
1
3
3
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.
ORDER INFORMATION
PART #
IRUK3055CQ01TR
IRUK3055CQ01
DESCRIPTION
VRM 9.0 Power Chipset in Tape and Reel
VRM 9.0 Power Chipset in Bulk
STANDARD PACK
1600
1
Rev. 1.0
06/26/02
www.irf.com
1
IRUK3055CQ01
TYPICAL APPLICATION CIRCUIT
12V
D1
C1
1uF
C2
0.1uF
Q1
IRF3704S
R1
OCSet
C3
1uF
L1
1uH
C4
1000uF
V
CH3
5V
C5
1uF
V
CH12
Vcc
V
CL1
V
CL23
HDrv1
C6
6 x 1500uF
L2
2.2K
Ref
LDrv1
Rt
PGnd1/
OCGnd
CS1
HDrv2
Q3
IRF3704S
Q4
IRF3711S
Q2
IRF3711S
1uH
R2
1.5K
C8
1uF
L3
1uH
R4
1.5K
C11
1.5V / 60A
SS
C9
1uF
R3
47K
C10
0.1uF
D4
IRU3055
LDrv2
PGnd2
D3
CS2
D2
HDrv3
D1
D0
C12
22nF
C7
100pF
Fb
R6
Comp
27K
CS3
LDrv3
PGnd3
Q5
IRF3704S
Q6
IRF3711S
1uF
L4
1uH
R5
1.5K
C13
1uF
C14
8x 2700uF
(Optional)
Figure 1 - Application circuit of a 3-phase Buck converter using the IRUK3055CQ01TR chipset.
V
OUT
= 1.5V @ 60A
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
2
www.irf.com
Rev. 1.0
06/26/02