CS5150H
CS5150H
CPU 4-Bit Synchronous Buck Controller
Description
The CS5150H is a 4-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 CS5150H is designed to operate
over a 4.25-20V range (V
CC
) using
12V to power the IC and 5V or 12V
as the main supply for conversion.
The CS5150H is specifically
designed to power Pentium
®
Pro
processors and other high perfor-
mance core logic. It includes the fol-
lowing features: on board, 4-bit
DAC, short circuit protection, 1.0%
output tolerance, V
CC
monitor, and
programmable soft start capability.
The CS5150H is upward compatible
with the 5-bit CS5155H, allowing
the mother board designer the
capability of using either the
CS5150H or the CS5155H with no
change in layout. The CS5150H is
available in 16 pin surface mount.
Features
s
Dual N-Channel Design
s
Excess of 1MHz Operation
s
100ns Transient Response
s
4-Bit DAC
s
Upward Compatible with
5-Bit CS5155H/5156H
and Adjustable
CS5120/5121
s
30ns Gate Rise/Fall Times
s
1% DAC Accuracy
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
Adaptive Voltage
Positioning
s
V
2
™ Control Topology
s
Current Sharing
s
Overvoltage Protection
Application Diagram
Switching Power Supply for core logic - Pentium
®
Pro processor
12V
5V
0.1µF
1200µF/16V x 3
AlEl
IRL3103
2µH
2.1V to 3.5V @ 13A
V
CC1
V
CC2
V
ID0
V
ID1
V
ID2
V
ID3
V
ID0
V
ID1
V
ID2
V
ID3
C
OFF
330pF
SS
0.1µF
0.33µF
COMP
LGnd
V
GATE(H)
Package Options
CS5150H
V
GATE(L)
IRL3103
1200µF/16V x 5
AlEl
16 Lead SO Narrow
V
ID0
V
ID1
V
ID2
V
ID3
SS
NC
C
OFF
V
FFB
1
PGnd
V
FB
V
FFB
3.3k
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. 1/21/99
1
A
®
Company
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
