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參數資料
| 型號： | SC1157 |
| 廠商： | Semtech Corporation |
| 英文描述： | Programmable Synchronous DC/DC Controller(用于先進微處理器的可編程同步DC/DC控制器（輸出電壓1.3V-2.05V,電壓型脈寬調制控制器）) |
| 中文描述： | 可編程同步DC / DC控制器（用于先進微處理器的可編程同步直流/直流控制器（輸出電壓為1.3V - 2.05V，電壓型脈寬調制控制器）） |
| 文件頁數： | 1/9頁 |
| 文件大小： | 241K |
| 代理商： | SC1157 |
POWER MANAGEMENT
Description
1
www.semtech.com
SC1157
Programmable Synchronous DC/DC
Controller for Advanced Processors
Features
Applications
u
Pentium II Core Supply
u
Multiple Microprocessor Supplies
u
Voltage Regulator Modules (VRM)
u
Programmable Power Supplies
u
High Efficiency DC/DC Conversion
Revision 4/01
The SC1157 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
SC1157 is ideal for implementing DC/DC converters
needed to power advanced microprocessors such as
the Pentium
ll , in both single and multiple
processor configurations. Internal level-shift, high-side drive
circuitry, and preset shoot-thru control, allows for use of
inexpensive N-channel power switches.
SC1157 features include an integrated 4-bit VID DAC,
temperature compensated voltage reference, triangle
wave oscillator, current limit comparator, frequency shift
over-current protection, and an internally compensated
error amplifier.
The SC1157 operates at a fixed 140KHz, providing an
optimum compromise between efficiency, external
component size, and cost.
u
Low cost / full featured
u
Synchronous operation
u
4 Bit VID
DAC programmable output (1% tolerance)
u
Designed to meet Intel VRM8.2 (Pentium
II)
u
1.5% Reference
R19
18.7
R20
100
U1
SC1157CS
1
3
2
5
4
7
10
11
12
13
14
15
16
8
6
9
GND
VCC
REF
CS+
CS-
DH
BSTH
EN
VOSENSE
VID3
VID2
VID1
VID0
DL
PGND
BSTL
Q5
Si4410
R10
2.2
C12
0.01uF
+
C7
1500uF
R5
1.00k
C4
0.1uF
+
33C24
R21
97.6
PHASE
Q3
Si4410
R8
2.2
+
-
U2B
LM358
5
6
7
8
4
C13
0.1uF
R9
2.2
R7
5mOhm
R16
1k
Q6
IRLR024N
12V
VCCP
C5
0.1uF
R1
10
+
C17
1500uF
R4
2.2
+
C15
1500uF
12V
+
C3
1500uF
+
C21
1500uF
2.5V
5V
+
C10
1500uF
L1
2uH
C6
0.1uF
+
C2
1500uF
+
C27
330uF
R22
100
Q7
IRLR024N
C11
0.1uF
Q1
5V
+
C9
1500uF
VID0
R14
0
R6
2.32k
Q2
R12
See Table
R15
0
VID2
VID1
C1
0.1uF
1.5V
+
-
U2A
LM358
3
2
1
8
4
Q4
Si4410
VID3
+
C8
1500uF
3.3V
R13
See Table
EN
R3
2.2
+
C25
330uF
Typical Application Circuit
相關PDF資料 |
PDF描述 |
|---|---|
| SC1158 | Programmable Synchronous DC/DC Controller(用于先進微處理器的可編程同步DC/DC控制器（輸出電壓2V-3.5V,電壓型脈寬調制控制器）) |
| SC1163 | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| SC1162 | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| SC1162CSW | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| SC1157CS | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:PROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED PROCESSORS |
| SC1157CS.TR | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:PROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED PROCESSORS |
| SC1158 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:PROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED PROCESSORS |
| SC1158CS | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:PROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED PROCESSORS |
| SC1158CS.TR | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:PROGRAMMABLE SYNCHRONOUS DC/DC CONTROLLER FOR ADVANCED PROCESSORS |
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