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SC1102ASTRT

更新时间: 2024-09-30 04:05:35
品牌 Logo 应用领域
商升特 - SEMTECH 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
页数 文件大小 规格书
12页 258K
描述
Synchronous Voltage Mode Controller for Distributed Power Supply Applications

SC1102ASTRT 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Obsolete零件包装代码:SOIC
包装说明:ROHS COMPLIANT, MS-012AB, SOIC-14针数:14
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.63
Is Samacsys:N模拟集成电路 - 其他类型:SWITCHING CONTROLLER
控制模式:VOLTAGE-MODE控制技术:PULSE WIDTH MODULATION
最大输入电压:12.6 V最小输入电压:4.2 V
标称输入电压:4.75 VJESD-30 代码:R-PDSO-G14
JESD-609代码:e3长度:8.65 mm
功能数量:1端子数量:14
最高工作温度:70 °C最低工作温度:
最大输出电流:1 A封装主体材料:PLASTIC/EPOXY
封装代码:SOP封装等效代码:SOP14,.25
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):NOT SPECIFIED认证状态:Not Qualified
座面最大高度:1.75 mm子类别:Switching Regulator or Controllers
表面贴装:YES切换器配置:PUSH-PULL
最大切换频率:575 kHz温度等级:COMMERCIAL
端子面层:Matte Tin (Sn)端子形式:GULL WING
端子节距:1.27 mm端子位置:DUAL
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:3.9 mm
Base Number Matches:1

SC1102ASTRT 数据手册

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SC1102/SC1102A  
Synchronous Voltage Mode Controller  
for Distributed Power Supply Applications  
POWER MANAGEMENT  
Features  
Description  
The SC1102 and SC1102A are low-cost, full featured,  
synchronous voltage-mode controllers 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  
SC1102s are ideal for implementing DC/DC converters  
needed to power advanced microprocessors in low cost  
systems, or in distributed power applications where effi-  
ciency is important. Internal level-shift, high-side drive  
circuitry, and preset shoot-thru control, allows the use of  
inexpensive N-channel power switches.  
‹ 1.265V reference available  
‹ Synchronous operation for high efficiency (95%)  
‹ RDS(ON) current sensing  
‹ On-chip power good and OVP functions  
‹ Small size with minimum external components  
‹ Soft Start  
‹ Enable function  
‹ 14 Pin SOIC lead free package available. Fully  
WEEE and RoHS compliant  
Applications  
‹ Microprocessor core supply  
‹ Low cost synchronous applications  
‹ Voltage Regulator Modules (VRM)  
‹ DDR termination supplies  
‹ Networking power supplies  
‹ Sequenced power supplies  
SC1102s features include temperature compensated  
voltage reference, triangle wave oscillator and current  
sense comparator circuitry. Power good signaling, shut-  
down, and over voltage protection are also provided.  
The SC1102 operates at a fixed frequency of 200kHz  
and the SC1102A at 500kHz, providing a choice for op-  
timum compromise between efficiency, external compo-  
nent size, and cost.  
Two SC1102s can be used together to sequence power  
up of telecom systems. The power good of the first  
SC1102 connected to the enable of the second SC1102  
makes this possible.  
Typical Application Circuit  
Typical Distributed Power Supply  
+5V  
+
R4  
C6  
C5  
C7  
C8  
Vin 5V  
R1  
1k  
R2  
10  
U1  
C1  
10.0  
680/6.3V  
680/6.3V  
680/6.3V  
SC1102  
opt.  
C2  
0.1  
_
1
14  
13  
12  
11  
10  
9
VCC  
GND  
SS/SHDN  
VREF  
PWRGD  
OVP  
C3  
0.1  
2
3
4
5
6
7
SHDN  
VREF  
PWRGD  
OVP  
R3  
1k  
0.1  
R8  
124*  
OCSET  
PHASE  
DRVH  
PGND  
SENSE  
BSTH  
R7  
127  
+12V  
C4  
1.0  
D1  
MBR0520  
Q1  
L1  
STP40NE  
2uH  
BSTL  
+
R5  
3.9  
Q2  
STP40NE  
8
DRVL  
C9  
C10  
180/4V  
C11  
180/4V  
C12  
180/4V  
C13  
Vout=2.5V*  
180/4V  
180/4V  
R6  
2.2  
_
NOTE:  
*) Vout = 1.265 x (1+R8/R7)  
Figure 1.  
1
www.semtech.com  
Revision: January 5, 2006  

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