CS5132H Datasheet, PDF (1/20 Pages) ON Semiconductor – Dual Output CPU Buck Controller

CS5132H
Dual Output CPU Buck Controller
Description
Features
The CS5132H is a dual output CPU
power supply controller. It con-
tains a synchronous dual NFET
buck controller utilizing the V^2TM
control method to achieve the
fastest possible transient response
and best overall regulation. The
CS5132H also contains a second
nonsynchronous NFET buck con-
troller. These synchronous and
nonsynchronous buck regulators
are designed to power the core and
I/O logic of the latest high perfor-
mance CPUs. The CS5132H incor-
porates many additional features
required to ensure the proper
operation and protection of the
CPU and power system. The
CS5132H dual output provides the
industry’s most highly integrated
solution, minimizing external com-
ponent count, total solution size,
and cost.
The CS5132H is specifically
designed to power Intel’s
Pentium^® II processor and
includes the following features:
5-bit DAC and fixed 1.23V refer-
ence, Power-Good output, hiccup
mode overcurrent protection,
adaptive voltage positioning, and
overvoltage protection.
The CS5132H will operate over an
8.4V to 20V range and is available
in 24 lead surface mount package.
Application Diagram
+12V +12V
+3.3V (VI/O)
PCB TRACE
(FreeCurrent
Sensing Element)
L2
6.6mΩ
3.5µH
C18-C21
1200µF
10V
x4
R2
510Ω
+5V
C3-C5
1200µF x 3
10V
Q3
FS70VSJ-03
MBRD835L
D1
C17
C2
1µF
20
16
23 _{VID0 VCC1 VCC2}
24 V_{ID1 GATE(H)} ¹⁷
19
1 _{VID2 GATE(L)}
2 _VID3
13
COMP2
3 _VID4
15 _GATE
51Ω
10
VFFB2
VFFB1 ⁸
12 _VOUT2
6
VOUT1
11 _{VFB2 PWRGD 22}
14 C_OFF2
21
OVP
5
COMP1
7 V_FB1
4
COFF1
R6
0.1µF
LGnd PGnd
510Ω
R3
9
18
2K
1%
C1
1µF
+5V
C6-C11
Q1
FS70VSJ-03
L1
1.2µH
1200µF x 6
10V
PCB TRACE (Free
Current Sensing
Element)
3.3mΩ
C23-C30
VCC(CORE)
1200µF x 8
10V
Q2
FS70VSJ-03
C12
0.1µF
C22 10K
100pF R7
R8
R1
510Ω
R5
510Ω
C13
0.1µF
C15
680pF
C14
0.1µF
R9
100Ω
R10
10K
0.01µF
C25
R4
1.18K
1%
C16
390pF
5V/12V to 2V/16A for Pentium^®II V_CC(CORE) , 5V/12V to 3.3V/8A for V_I/O
V² is a trademark of Switch Power, Inc.
Pentium is a registered trademark of Intel Corporation.
December, 2001 - Rev. 2
1
s Synchronous Switching
Regulator Controller (V_CORE)
s Dual N-Channel MOSFET
Synchronous Buck Design
s V^2TM Control Topology
s 200ns Transient Loop Response
s 5-Bit DAC with 1% Tolerance
s Hiccup Mode Overcurrent
Protection
s 65ns adaptive FET Non-Overlap
Time
s Nonsynchronous Switching
Regulator Controller (V_I/O)
s Single N-Channel MOSFET
buck design
s Adjustable Output with 2%
Tolerance
s System Power Management
Pentium^® II System V_CORE
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 Option
24L SO Wide
V_ID2 1
V_ID3 2
V_ID4 3
C_OFF1 4
COMP1 5
V_OUT1 6
V_FB1 7
V_FFB1 8
LGND 9
V_FFB2 10
V_FB2 11
V_OUT2 12
24 V_ID1
23 V_ID0
22 PWRGD
21 OVP
20 V_CC1
19 GATEL
18 PGND
17 GATEH
16 V_CC2
15 GATE
14 C_OFF2
13 COMP2
ON Semiconductor
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Tel: (401)885–3600 Fax: (401)885–5786
N. American Technical Support: 800-282-9855
Web Site: www.cherry–semi.com