CS5158
CPU 5-Bit Synchronous Buck Controller
Features
Description
The CS5158 is a 5-Bit synchronous
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-
ꢀ Dual N-Channel Design
ꢀ Excess of 1MHz Operation
ꢀ 100ns Transient Response
ꢀ 5-Bit DAC
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
ꢀ Backward Compatible with
operates using a proprietary control erance for the 01111 DAC code
Adjustable CS5157
method, which allows a 100ns
response time to load transients.
The CS5158 is designed to operate
over a 4.25-16V range (VCC) using
12V to power the IC and 5V as the
main supply for conversion.
(1.3V) and 1% for the remaining
DAC codes, VCC monitor, and pro-
grammable soft start capability. The
CS5158 is available in 16 pin surface
mount.
ꢀ 30ns Gate Rise/Fall Times
ꢀ 0.8% Accuracy for the
01111 DAC Code and 1%
for the Remaining DAC
Codes
ꢀ 5V & 12V Operation
ꢀ Remote Sense
ꢀ Programmable Soft Start
Application Diagram
Switching Power Supply for core logic - Pentium® II processor
ꢀ Lossless Short Circuit
Protection
ꢀ VCC Monitor
ꢀ 25ns FET Nonoverlap Time
ꢀ V2 Control Topology
12V
5V
TM
1200µF/10V x 3
AlEl
0.1µF
ꢀ Current Sharing
ꢀ Overvoltage Protection
V
IRL3103
V
CC2
CC1
V
GATE(H)
2µH
1.3V to 3.5V @ 13A
V
V
ID0
V
ID1
V
ID2
ID0
V
V
ID1
ID2
Package Options
CS5158
V
V
ID3
V
V
IRL3103
ID3
16 Lead SO Narrow
V
GATE(L)
ID4
ID4
1200µF/10V x 5
AlEl
C
OFF
1
V
V
V
V
ID0
ID1
ID2
FB
PGnd
330pF
COMP
LGnd
SS
V
FB
V
V
V
ID3
CC1
0.1µF
COMP
3.3k
V
FFB
LGnd
SS
GATE(L)
0.33µF
V
PGnd
V
ID4
100pF
C
OFF
GATE(H)
V
V
CC2
FFB
V2 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