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LT1776IN8#PBF PDF预览

LT1776IN8#PBF

更新时间: 2024-02-27 01:14:17
品牌 Logo 应用领域
凌特 - Linear 开关光电二极管
页数 文件大小 规格书
20页 226K
描述
LT1776 - Wide Input Range, High Efficiency, Step-Down Switching Regulator; Package: PDIP; Pins: 8; Temperature Range: -40°C to 85°C

LT1776IN8#PBF 技术参数

是否无铅: 含铅是否Rohs认证: 符合
生命周期:Active包装说明:DIP,
针数:8Reach Compliance Code:compliant
风险等级:4.64模拟集成电路 - 其他类型:SWITCHING REGULATOR
控制模式:CURRENT-MODE控制技术:PULSE WIDTH MODULATION
最大输入电压:60 V最小输入电压:7.4 V
标称输入电压:40 VJESD-30 代码:R-PDIP-T8
JESD-609代码:e3湿度敏感等级:1
功能数量:1端子数量:8
最大输出电流:1 A封装主体材料:PLASTIC/EPOXY
封装代码:DIP封装形状:RECTANGULAR
封装形式:IN-LINE峰值回流温度(摄氏度):NOT SPECIFIED
认证状态:Not Qualified座面最大高度:3.937 mm
表面贴装:NO切换器配置:BUCK
最大切换频率:230 kHz端子面层:MATTE TIN
端子形式:THROUGH-HOLE端子节距:2.54 mm
端子位置:DUAL处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:7.62 mm

LT1776IN8#PBF 数据手册

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LT1776  
Wide Input Range,  
High Efficiency, Step-Down  
Switching Regulator  
U
DESCRIPTION  
FEATURES  
The LT®1776 is a wide input range, high efficiency Buck  
(step-down) switching regulator. The monolithic die in-  
cludes all oscillator, control and protection circuitry. The  
part can accept input voltages as high as 60V and contains  
an output switch rated at 700mA peak current. Current  
mode control delivers excellent dynamic input supply  
rejection and short-circuit protection.  
Wide Input Range: 7.4V to 40V  
Tolerates Input Transients to 60V  
700mA Peak Switch Rating  
Adaptive Switch Drive Maintains Efficiency at High  
Load Without Pulse Skipping at Light Load  
True Current Mode Control  
200kHz Fixed Operating Frequency  
Synchronizable to 400kHz  
The LT1776 contains several features to enhance effi-  
ciency. The internal control circuitry is normally powered  
via the VCC pin, thereby minimizing power drawn directly  
from the VIN supply (see Applications Information). The  
action of the LT1776 switch circuitry is also load depen-  
dent. At medium to high loads, the output switch circuitry  
maintains fast rise time for good efficiency. At light loads,  
rise time is deliberately reduced to avoid pulse skipping  
behavior.  
Low Supply Current in Shutdown: 30µA  
Available in 8-Pin SO and PDIP Packages  
U
APPLICATIONS  
Automotive DC/DC Converters  
Cellular Phone Battery Charger Accessories  
IEEE 1394 Step-Down Converters  
The available SO-8 package and 200kHz switching fre-  
quency allow for minimal PC board area requirements.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATION  
V
IN  
Efficiency vs VIN and ILOAD  
8V TO 40V  
5
90  
V
IN  
1
2
3
80  
SHDN  
V
CC  
100µH*  
5V  
V
SW  
70  
400mA  
+
+
100µF  
10V  
36.5k  
39µF  
63V  
MBR160  
LT1776  
1%  
60  
50  
40  
30  
20  
7
8
FB  
6
SYNC  
V
C
2200pF  
V
V
V
V
= 10V  
= 20V  
= 30V  
= 40V  
12.1k  
1%  
IN  
IN  
100pF  
22k  
GND  
4
IN  
IN  
*43T #30 ON MAGNETICS  
MPP #55030  
1776 F01  
1
10  
100  
1000  
LOAD CURRENT (mA)  
1776 TA01  
Figure 1  
1

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