CS5150 Datasheet, PDF (1/14 Pages) Cherry Semiconductor Corporation – CPU 4-Bit Synchronous Buck Controller

CS5150
CPU 4-Bit Synchronous Buck Controller
Description
Features
The CS5150 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 CS5150 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 CS5150 is specifically designed
to power Pentium^® Pro processors
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, V_CC monitor, and pro-
grammable soft start capability. The
CS5150 is upward compatible with
the 5-bit CS5155, allowing the
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.
Application Diagram
Switching Power Supply for core logic - Pentium^® Pro processor
12V
5V
0.1µF
V_ID0
V_ID1
V_ID2
V_ID3
330pF
V_CC1
V_CC2
V_GATE(H)
V_ID0
V_ID1
V_ID2
V_ID3
CS5150
V_GATE(L)
C_OFF
PGnd
0.1µF
SS
COMP
0.33µF
LGnd
V_FB
V_FFB
3.3k
100pF
1200µF/16V x 3
AlEl
IRL3103
2µH
2.1V to 3.5V @ 13A
IRL3103
1200µF/16V x 5
AlEl
s Dual N-Channel Design
s Excess of 1MHz Operation
s 100ns Transient Response
s 4-Bit DAC
s Upward Compatible with
5-Bit CS5155/5156 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
Package Options
16 Lead SO Narrow & PDIP
V_ID0 1
V_ID1
V_ID2
V_ID3
SS
NC
C_OFF
V_FFB
V_FB
COMP
LGnd
V_CC1
V_GATE(L)
PGnd
V_GATE(H)
V_CC2
V² is a trademark of Switch Power, Inc.
Pentium is a registered trademark of Intel Corporation.
Rev. 1/4/99
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: [phone] Fax: [phone]
Email: [e-mail]
Web Site: www.cherry-semi.com
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