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LTC1149CS-5 PDF预览

LTC1149CS-5

更新时间: 2024-09-29 22:25:51
品牌 Logo 应用领域
凌特 - Linear 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
20页 393K
描述
High Efficiency Synchronous Step-Down Switching Regulators

LTC1149CS-5 技术参数

是否Rohs认证: 不符合生命周期:Transferred
零件包装代码:SOIC包装说明:0.150 INCH, PLASTIC, SOP-16
针数:16Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.1模拟集成电路 - 其他类型:SWITCHING CONTROLLER
控制模式:CURRENT-MODE控制技术:CONSTANT OFF TIME
最大输入电压:48 V最小输入电压:12 V
标称输入电压:12 VJESD-30 代码:R-PDSO-G16
JESD-609代码:e0长度:9.906 mm
湿度敏感等级:1功能数量:1
端子数量:16最高工作温度:70 °C
最低工作温度:最大输出电流:0.05 A
标称输出电压:5 V封装主体材料:PLASTIC/EPOXY
封装代码:SOP封装等效代码:SOP16,.25
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):235认证状态:Not Qualified
座面最大高度:1.752 mm子类别:Switching Regulator or Controllers
最大供电电流 (Isup):3 mA表面贴装:YES
切换器配置:PUSH-PULL最大切换频率:250 kHz
技术:CMOS温度等级:COMMERCIAL
端子面层:Tin/Lead (Sn/Pb)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:20宽度:3.899 mm
Base Number Matches:1

LTC1149CS-5 数据手册

 浏览型号LTC1149CS-5的Datasheet PDF文件第2页浏览型号LTC1149CS-5的Datasheet PDF文件第3页浏览型号LTC1149CS-5的Datasheet PDF文件第4页浏览型号LTC1149CS-5的Datasheet PDF文件第5页浏览型号LTC1149CS-5的Datasheet PDF文件第6页浏览型号LTC1149CS-5的Datasheet PDF文件第7页 
LTC1149  
LTC1149-3.3/LTC1149-5  
High Efficiency Synchronous  
Step-Down Switching Regulators  
U
DESCRIPTIO  
EATURE  
S
F
Operation to 48V Input Voltage  
The LTC®1149 series is a family of synchronous step-  
down switching regulator controllers featuring automatic  
Burst ModeTM operation to maintain high efficiencies at  
low output currents. These devices drive external comple-  
mentary power MOSFETs at switching frequencies up  
to 250kHz using a constant off-time current-mode archi-  
tecture.  
Ultrahigh Efficiency: Up to 95%  
Current Mode Operation for Excellent Line and  
Load Transient Response  
High Efficiency Maintained over Wide Current Range  
Logic-Controlled Micropower Shutdown  
Short-Circuit Protection  
Very Low Dropout Operation: 100% Duty Cycle  
Synchronous FET Switching for High Efficiency  
Adaptive Nonoverlap Gate Drives  
Special onboard regulation and level-shift circuitry allow  
operation at input voltages from dropout to 48V (60V  
absolute max). The constant off-time architecture main-  
tains constant ripple current in the inductor, easing the  
design of wide input range converters. Current mode  
operation provides excellent line and load transient  
response. The operating current level is user-program-  
mable via an external current sense resistor.  
Available in 16-Pin Narrow SO Package  
O U  
PPLICATI  
A
S
Notebook and Palmtop Computers  
Portable Instruments  
Battery-Operated Digital Devices  
Industrial Power Distribution  
Avionics Systems  
The LTC1149 series incorporates automatic power saving  
Burst Modeoperation when load currents drop below the  
level required for continuous operation. Standby power is  
reduced to only about 8mW at VIN = 12V. In shutdown,  
both MOSFETs are turned off.  
Telecom Power Supplies  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Burst Modeis a trademark of Linear Technology Corporation.  
U
O
TYPICAL APPLICATI  
V
IN  
LTC1149-5 Efficiency  
C
+
IN  
1N4148  
1N4148  
100  
90  
80  
70  
60  
100µF  
V
IN  
FIGURE 1 CIRCUIT  
100V  
CAP  
P-CHANNEL  
IRFR9024  
PGATE  
V
= 12V  
IN  
0.068µF  
V
V
0.047µF  
D1  
1N5819  
CC  
+
PDRIVE  
3.3µF  
L*  
62µH  
R
**  
CC  
SENSE  
0.05Ω  
V
= 24V  
V
IN  
OUT  
LTC1149-5  
5V/2A  
+
SHDN1  
SHDN2  
SENSE  
SENSE  
0V = NORMAL  
>2V = SHUTDOWN  
1000pF  
I
TH  
+
N-CHANNEL  
IRFR024  
C
OUT  
220µF  
3300µF  
C
NGATE  
SGND P, RGNDS  
T
C
T
1k  
470pF  
0.02  
0.2  
LOAD CURRENT (A)  
2
*COILTRONICS CTX62-2-MP  
**KRL SL-1-C1-0R050J  
1149 F01  
1149 TA01  
Figure 1. High Efficiency Step-Down Regulator  
1

LTC1149CS-5 替代型号

型号 品牌 替代类型 描述 数据表
LTC1149CS-5#TR Linear

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LTC1149 - High Efficiency Synchronous Step-Down Switching Regulators; Package: SO; Pins: 1

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