參數(shù)資料
型號(hào)： SC1102EVB
廠商： Semtech Corporation
英文描述： SYNCHRONOUS DC/DC CONTROLLER FOR DISTRIBUTED POWER SUPPLY APPLICATIONS
中文描述： 同步DC / DC控制器的分布式電源應(yīng)用
文件頁數(shù)： 1/10頁
文件大小： 146K
代理商： SC1102EVB
SC1102
SYNCHRONOUS DC/DC CONTROLLER FOR
DISTRIBUTED POWER SUPPLY APPLICATIONS
2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
September 5, 2000
1
DESCRIPTION
The SC1102 is a low-cost, full featured, synchronous
voltage-mode controller designed for use in single
ended power supply applications where efficiency is of
primary concern. Synchronous operation allows for the
elimination of heat sinks in many applications. The
SC1102 is ideal for implementing DC/DC converters
needed to power advanced microprocessors in low
cost systems, or in distributed power applications
where efficiency is important. Internal level-shift, high-
side drive circuitry, and preset shoot-thru control, al-
lows the use of inexpensive N-channel power switches.
SC1102 features include temperature compensated
voltage reference, triangle wave oscillator and current
sense comparator circuitry. Power good signaling,
shutdown, and over voltage protection are also pro-
vided.
The SC1102 operates at a fixed 200kHz, providing an
optimum compromise between efficiency, external
component size, and cost.
FEATURES
1.265V Reference available
Synchronous operation
Over current fault monitor
On-chip power good and OVP functions
Small size with minimum external components
Soft Start
R
DS(ON)
Current sensing
APPLICATIONS
Microprocessor core supply
Low cost synchronous applications
Voltage Regulator Modules (VRM)
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DEVICE
(1)
PACKAGE
TEMP. RANGE (T
J
)
0 - 125°C
SC1102CSTR
SO-14
SC1102EVB
Evaluation Board
ORDERING INFORMATION
Note:
(1) Only available in tape and reel packaging. A reel
contains 2500 devices.
APPLICATION CIRCUIT
Figure 1.
Typical Distributed Power Supply
VCC
1
PWRGD
2
OVP
3
OCSET
4
PHASE
5
DRVH
6
PGND
7
DRVL
8
BSTL
9
BSTH
10
SENSE
11
VREF
12
SS/SHDN
13
GND
14
U1
Q1
Q2
R5
3.9
L1
C9
C10
C11
C12
C7
C6
680/6.3V
R1
1k
R3
1k
C2
0.1
C3
0.1
C1
0.1
R2
PWRGD
OVP
SHDN
VREF
+
_
+
_
Vin 5V
Vout=2.5V*
R7
127
R8
NOTE:
*) Vout = 1.265 x (1+R8/R7)
+5V
MBD1
R6
2.2
C4
1.0
C5
C8
R4
10
+12V
C13
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參數(shù)描述
SC1103 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:VOLTAGE MODE PWM CONTROLLER
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SC1103CS.TR.T 制造商:Semtech Corporation 功能描述:Voltage Mode PWM Controller 500mA 8-Pin SOIC T/R
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