CS5166H
CS5166H
5-Bit Synchronous CPU Controller
with Power-Good and Current Limit
Description
The CS5166H is a synchronous
dual NFET Buck Regulator
Controller. It is designed to pow-
er the core logic of the latest high
performance CPUs. It uses the
V
2
TM
control method to achieve
the fastest possible transient
response and best overall regula-
tion. It incorporates many addi-
tional features required to ensure
the proper operation and protec-
tion of the CPU and power sys-
tem. The CS5166H provides the
industry’s most highly integrat-
ed solution, minimizing external
component count, total solution
size, and cost.
The CS5166H is specifically
designed to power Intel’s
Pentium
®
II processor and
includes the following features:
5-bit DAC with 1% tolerance,
Power-Good output, adjustable
hiccup mode over-current pro-
tection, V
CC
monitor, Soft Start,
adaptive voltage positioning,
over-voltage protection, remote
sense and current sharing capa-
bility.
The CS5166H will operate over a
4.15 to 20V range using either
single or dual input voltage and
is available in a 16 lead wide
body surface mount package.
Features
s
V
2
TM
Control Topology
s
Dual N-Channel Design
s
125ns Controller Transient Response
s
Excess of 1Mhz Operation
s
5-bit DAC with 1% Tolerance
s
Power-Good Output with Internal
Delay
s
Adjustable Hiccup Mode Over
Current Protection
s
Complete Pentium
®
II System
Requires just 21 Components
s
5V and 12V Operation using either
Dual or Single Supplies
s
Adaptive Voltage Positioning
s
Remote Sense Capability
Application Diagram
5V to 2.8V @ 14.2A for 300MHz Pentium® II
5V
12V
1200µF/10V x 3
s
Current Sharing Capability
s
V
CC
Monitor
s
Overvoltage Protection (OVP)
s
Programmable Soft Start
s
200ns PWM Blanking
s
65ns FET Non-Overlap
1µF
C
OFF
330pF
0.1µF
0.1µF
SS
COMP
V
CC
GATE(H)
1.2µH
3.0mΩ
510
1200µF
10V x 5
I
SENSE
s
40ns Gate Rise and Fall Times
(3.3nF load)
Pentium® II
System
PWRGD
CS5166H
0.1µF
GATE(L)
V
ID0
V
ID1
V
ID2
V
ID3
V
ID4
PWRGD
V
FB
PGnd
LGnd
Package Options
16 Lead SO WIDE
V
ID0
V
ID1
V
ID2
V
ID3
SS
1
V
FB
COMP
LGnd
PWRGD
GATE(L)
PGnd
GATE(H)
V
CC
3.3K
V
ID4
1000pF
V
ID3
V
ID2
V
ID1
V
ID0
V
ID4
C
OFF
V
2
is a trademark of Switch Power, Inc.
Pentium is a registered trademark of Intel Corporation.
I
SENSE
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. 6/28/99
1
A
®
Company
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
