
The CS5132 is a dual output CPU
power supply controller. It con-
tains a synchronous dual NFET
buck controller utilizing the V
2
TM
control method to achieve the
fastest possible transient response
and best overall regulation. The
CS5132 also contains a second non-
synchronous NFET buck con-
troller. These synchronous and
non-synchronous buck regulators
are designed to power the core and
I/O logic of the latest high perfor-
mance CPUs. The CS5132 incorpo-
rates many additional features
required to ensure the proper
operation and protection of the
CPU and power system. The
CS5132 dual output provides the
industrys most highly integrated
solution, minimizing external com-
ponent count, total solution size,
and cost.
The CS5132 is specifically designed
to power Intels Pentium
¨
II pro-
cessor and includes the following
features: 5 bit DAC and fixed
1.23V reference, Power-Good out-
put, hiccup mode overcurrent pro-
tection, adaptive voltage position-
ing, and overvoltage protection.
The CS5132 will operate over an
8.4V to 14V range and is available
in 24 lead surface mount package.
1
Features
+5V
+12V
+5V
+3.3V (V
I/O
)
V
CC(CORE)
V
ID0
V
ID1
V
ID3
V
ID2
V
ID4
GATE
Q3
PCB TRACE
(FreeCurrent
Sensing Element)
6.6m
W
L2
3.5
m
H
MBRD835L
V
OUT2
10V
x 4
510
W
V
FFB2
2K
1%
1.18K
1%
V
FB2
C
OFF2
V
CC1
V
CC2
LGnd
GATE(H)
Q1
1.2
m
H
L1
Q2
GATE(L)
COMP2
PCB TRACE (Free
Current Sensing
Element)
3.3m
W
10V
10V
510
W
V
FFB1
V
OUT1
PWRGD
OVP
COMP1
C
OFF1
PGnd
23
24
1
2
3
12
11
14
20
16
4
5
21
22
6
8
13
19
17
15
C1
1
m
F
C6-C11
C12
0.1
m
F
C14
0.1
m
F
C15
680pF
C16
390pF
C17
C18-C21
C23-C30
R1
R2
R3
R4
V
FB1
7
C3-C5
510
W
R5
510
W
R6
FS70VSJ-03
0.1
m
F
1200
m
F
1200
m
F x 6
1200
m
F x 8
D1
1200
m
F x 3
10V
9
18
FS70VSJ-03
FS70VSJ-03
10
10K
100pF
51
W
C13
0.1
m
F
100
W
R10
0.01
m
F
10K
C25
R9
R8
R7
C22
+12V
C2
1
m
F
I
Synchronous Switching
Regulator Controller (V
CORE
)
Dual N-Channel MOSFET
Synchronous Buck Design
V
2
TM
Control Topology
I
I
I
200ns Transient Loop Response
I
5 bit DAC with 1% Tolerance
I
Hiccup Mode Overcurrent
Protection
I
65ns adaptive FET Non-Overlap
Time
I
Non-Synchronous Switching
Regulator Controller (V
I/O
)
Single N-Channel MOSFET
buck design
I
I
Adjustable Output with 2%
Tolerance
I
System Power Management
Pentium
¨
II System V
and V
I/O
Controlled by
a Single IC
Power-Good Output
Monitors V
CORE
Switching
Regulator Output
OVP Signal Monitors V
CORE
Switching Regulator Output
Package Options
24L SO Wide
C
Dual Output CPU Buck Controller
CS5132
Description
Application Diagram
16
15
14
13
12
11
10
1
2
3
4
5
6
7
8
V
ID2
V
ID3
V
ID4
C
OFF1
COMP1
V
OUT1
V
FB1
V
FFB1
V
ID1
V
ID0
PWRGD
OVP
V
CC1
GATEL
PGND
GATEH
LGND
V
CC2
9
17
18
V
FFB2
GATE
19
20
V
FB2
C
OFF2
V
OUT2
COMP2
21
22
23
24
5V/12V to 2V/16A for Pentium
¨
II V
CC(CORE)
, 5V/12V to 3.3V/8A for V
I/O
Pentium is a registered trademark of Intel Corporation.
V
2
is a trademark of Switch Power, Inc.
Rev. 11/3/98
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: info@cherry-semi.com
Web Site: www.cherry-semi.com
A
Company
¨