CS5158
CS5158
CPU 5-Bit Synchronous Buck Controller
Description
The CS5158 is a 5-Bit synchronous
dual N-Channel buck controller. It
is designed to provide unprece-
dented transient response for
today’s demanding high-density,
high-speed logic. The regulator
operates using a proprietary control
method, which allows a 100ns
response time to load transients.
The CS5158 is designed to operate
over a 4.25-16V range (V
CC
) using
12V to power the IC and 5V as the
main supply for conversion.
The CS5158 is specifically designed
to power Pentium
®
II processors
and other high performance core
logic. It includes the following fea-
tures: on board, 5-Bit DAC, short
circuit protection, 0.8% output tol-
erance for the 01111 DAC code
(1.3V) and 1% for the remaining
DAC codes, V
CC
monitor, and pro-
grammable soft start capability. The
CS5158 is available in 16 pin surface
mount.
Features
s
Dual N-Channel Design
s
Excess of 1MHz Operation
s
100ns Transient Response
s
5-Bit DAC
s
Backward Compatible with
Adjustable CS5157
s
30ns Gate Rise/Fall Times
s
0.8% Accuracy for the
01111 DAC Code and 1%
for the Remaining DAC
Codes
s
5V & 12V Operation
s
Remote Sense
s
Programmable Soft Start
s
Lossless Short Circuit
Protection
s
V
CC
Monitor
s
25ns FET Nonoverlap Time
s
V
2
TM
Control Topology
1200µF/10V x 3
AlEl
Application Diagram
Switching Power Supply for core logic - Pentium
®
II processor
12V
5V
0.1µF
s
Current Sharing
s
Overvoltage Protection
V
CC1
V
CC2
V
ID0
V
ID1
V
ID2
V
ID3
V
ID4
330pF
SS
0.1µF
0.33µF
COMP
LGnd
V
ID0
V
ID1
V
ID2
V
ID3
V
ID4
C
OFF
V
GATE(H)
IRL3103
2µH
1.3V to 3.5V @ 13A
Package Options
CS5158
V
GATE(L)
IRL3103
1200µF/10V x 5
AlEl
PGnd
V
FB
V
FFB
3.3k
16 Lead SO Narrow
V
ID0
V
ID1
V
ID2
V
ID3
SS
V
ID4
C
OFF
V
FFB
1
V
FB
COMP
LGnd
V
CC1
V
GATE(L)
PGnd
V
GATE(H)
V
CC2
100pF
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. 2/16/99
1
A
®
Company
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
