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參數(shù)資料
| 型號： | CS5127 |
| 廠商： | ZF Electronics Corporation |
| 英文描述： | Dual Output Nonsynchronous Buck Controller with Sync Function and Second Channel Enable |
| 中文描述： | 非同步雙輸出同步降壓控制器的功能及第二通道啟用 |
| 文件頁數(shù)： | 1/24頁 |
| 文件大?。?/td> | 293K |
| 代理商： | CS5127 |
Features
3.3V
C
T
SYNC
COMP2
PGnd
COMP1
ENABLE
LGnd
V
FB1
V
FB2
V
REF
V
IN
GATE1
GATE2
R6
1k
CS5127
C12, C13
2 x 680
m
F
R9
2k
Q3
IRL3103S
R11
R2
27k
V
FFB1
V
FFB2
R
T
Q2
IRL3103S
C16
100
m
F
C8
1
m
F
R3
18k
D2
1N5821
C15
100
m
F
L2
5
m
H
C1, C2
2 x 680
m
F
L1
5
m
H
C7
330pF
2.8V
C10, C11
2 x 680
m
F
+5V
C3
1
m
F
D1
1N5821
C14
330pF
R4
1540
R5
1270
R10
20k
+
C6
0.1
m
F
R1
20k
Q1
FMMT2222ACT
5V
12V
+
C4, C5
2 x 680
m
F
+
C17
330pF
20k
+
+
+
R7
2400
R8
1500
C9
0.1
m
F
I
Nonsynchronous Buck
Design
V
2
aControl Topology
100ns Transient Loop
Response
Programmable Oscillator
Frequency
30ns Typical Gate Rise
and 10ns Fall Times
(No Load)
Frequency
Synchronization Input
ENABLE Input Controls
Channel 2 Gate Driver
5V/10mA Reference
Output
I
I
I
I
I
I
I
Package Option
C
Dual Output Nonsynchronous Buck Controller
with Sync Function and Second Channel Enable
Description
CS5127
The CS5127 is a fixed frequency
dual output nonsynchronous buck
controller. It contains circuitry for
regulating two separate outputs.
Each output channel contains a
high gain error amplifier, a com-
parator and latch, and a totem-pole
output driver capable of providing
DC current of 100mA and peak cur-
rent in excess of 0.5A. A common
oscillator controls switching for
both channels, and a sync lead is
provided to allow parallel supply
operation or shifting of the switch-
ing noise spectrum. An on-chip 5V
reference is capable of providing as
much as 10mA of current for exter-
nal circuitry. The CS5127 also
contains two undervoltage lockout
circuits. The first lockout releases
when V
IN
reaches 8.4V, while the
second lockout ensures that V
REF
is
higher than 3.6V. The outputs are
held in a low state until both lock-
outs have released. The controller is
configured to utilize the V
2
acon-
trol method to achieve the fastest
possible transient response and
best overall regulation. This dual
controller is a cost-effective solu-
tion for providing V
CORE
and V
IO
power solutions in computing
applications using a single con-
troller. The CS5127 will operate
over an input voltage range of 9.4V
to 20V and is available in a 16 lead
wide body surface mount package.
Applications Diagram
16 Lead SOIC Wide
1
1
C
T
SYNC
COMP2
PGND
COMP1
ENABLE
LGND
V
FB1
V
FB2
V
REF
V
IN
GATE1
GATE2
V
FFB1
V
FFB2
R
T
12V, 5V to 2.8V @ 7A and 3.3V @ 7A for 233MHz Pentium
¨
Processor with MMXa Technology
V
2
is a trademark of Switch Power, Inc.
Pentium is a registered trademark and MMX is a trademark of Intel Corporation
Rev. 11/3/98
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
A
Company
¨
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