CS5132
CS5132
Dual Output CPU Buck Controller
Description
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
industryÕs most highly integrated
solution, minimizing external com-
ponent count, total solution size,
and cost.
The CS5132 is specifically designed
to power IntelÕs 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.
s
s
s
s
s
s
s
s
s
s
s
C6-C11
1200mF x 6
10V
+5V
C3-C5
1200mF x 3
10V
23
C2
1mF
20
16
C1
1mF
Q1
FS70VSJ-03
L1
1.2mH
1200mF x 8
10V
17
19
+3.3V (V
I/O
)
1
2
PCB TRACE
(FreeCurrent
Sensing Element)
Features
Synchronous Switching
Regulator Controller (V
CORE
)
Dual N-Channel MOSFET
Synchronous Buck Design
V
2
TM
Control Topology
200ns Transient Loop Response
5 bit DAC with 1% Tolerance
Hiccup Mode Overcurrent
Protection
65ns adaptive FET Non-Overlap
Time
Non-Synchronous Switching
Regulator Controller (V
I/O
)
Single N-Channel MOSFET
buck design
Adjustable Output with 2%
Tolerance
System Power Management
Pentium
¨
II System V
CORE
and V
I/O
Controlled by
a Single IC
Application Diagram
+12V
+12V
+5V
PCB TRACE (Free
Current Sensing
Element)
3.3mW
C23-C30
V
CC(CORE)
V
ID0
V
CC1
V
CC2
GATE(H)
GATE(L)
13
V
ID3
V
ID4
GATE
V
FFB2
V
FFB1
V
OUT1
V
FB2
C
OFF2
PWRGD
OVP
COMP1
22
21
5
4
C15
680pF
C14
0.1mF
R9
51W
8
6
C13
0.1mF
COMP2
C12
0.1mF
C22
100pF
R8
Q2
Power-Good Output
Monitors V
CORE
Switching
Regulator Output
OVP Signal Monitors V
CORE
Switching Regulator Output
24 V
ID1
V
ID2
FS70VSJ-03
Q3
L2
FS70VSJ-03
3
15
10
10K
R7
R1
510W
R5
510W
6.6mW
3.5mH
C18-C21
MBRD835L
Package Options
24L SO Wide
V
ID2
V
ID3
V
ID4
C
OFF1
COMP1
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
12
11
14
V
OUT2
D1
1200mF
10V
x4
V
ID1
V
ID0
PWRGD
OVP
V
CC1
GATEL
PGND
GATEH
V
CC2
GATE
C
OFF2
COMP2
R2
510W
C17
7 V
FB1
0.1mF
9
R3
LGnd
C
OFF1
PGnd
18
R6
510W
0.01mF
2K
1%
100W
R10
C25
10K
V
OUT1
V
FB1
R4
1.18K
1%
C16
390pF
V
FFB1
LGND
V
FFB2
5V/12V to 2V/16A for
Pentium
¨
II
V
CC(CORE)
, 5V/12V to 3.3V/8A for V
I/O
V
FB2
V
OUT2
V
2
is a trademark of Switch Power, Inc.
Pentium is a registered trademark of Intel Corporation.
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
Rev. 11/3/98
1
A
¨
Company
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
