CS5150
CPU 4-Bit Synchronous Buck Controller
Features
Description
The CS5150 is a 4-bit synchronous
and other high performance core
logic. It includes the following fea-
tures: on board, 4-bit DAC, short
circuit protection, 1.0% output tol-
erance, VCC monitor, and pro-
ꢀ Dual N-Channel Design
ꢀ Excess of 1MHz Operation
ꢀ 100ns Transient Response
ꢀ 4-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
grammable soft start capability. The
ꢀ Upward Compatible with
5-Bit CS5155/5156 and
operates using a proprietary control CS5150 is upward compatible with
method, which allows a 100ns
response time to load transients.
The CS5150 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.
the 5-bit CS5155, allowing the
Adjustable CS5120/5121
mother board designer the capabili-
ty of using either the CS5150 or the
CS5155 with no change in layout.
The CS5150 is available in 16 pin
surface mount and DIP packages.
ꢀ 30ns Gate Rise/Fall Times
ꢀ 1% DAC Accuracy
ꢀ 5V & 12V Operation
ꢀ Remote Sense
The CS5150 is specifically designed
to power Pentium® Pro processors
ꢀ Programmable Soft Start
ꢀ Lossless Short Circuit
Protection
Application Diagram
Switching Power Supply for core logic - Pentium® Pro processor
ꢀ VCC Monitor
ꢀ 25ns FET Nonoverlap Time
ꢀ Adaptive Voltage
12V
5V
Positioning
ꢀ V2 Control Topology
™
1200µF/16V x 3
AlEl
0.1µF
ꢀ Current Sharing
V
CC2
IRL3103
V
ꢀ Overvoltage Protection
CC1
V
GATE(H)
2µH
2.1V to 3.5V @ 13A
V
V
ID0
V
ID1
V
ID2
V
ID3
ID0
V
V
ID1
ID2
Package Options
CS5150
V
ID3
IRL3103
16 Lead SO Narrow & PDIP
V
GATE(L)
1200µF/16V x 5
AlEl
C
OFF
1
V
ID0
V
ID1
V
ID2
V
FB
PGnd
330pF
COMP
LGnd
SS
V
FB
V
V
V
ID3
CC1
0.1µF
COMP
3.3k
V
FFB
SS
LGnd
GATE(L)
0.33µF
NC
PGnd
V
100pF
C
OFF
GATE(H)
V
FFB
V
CC2
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. 1/4/99
1
A
®
Company