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ST779AC PDF预览

ST779AC

更新时间: 2024-01-23 08:24:22
品牌 Logo 应用领域
其他 - ETC 转换器输出元件DC-DC转换器
页数 文件大小 规格书
11页 346K
描述
LOW VOLTAGE 3-3.3V/5V/ADJUSTABLE OUTPUT DC-DC CONVERTER WITH SYNCHRONOUS RECTIFIERS

ST779AC 技术参数

是否Rohs认证:符合生命周期:Obsolete
零件包装代码:DIP包装说明:PLASTIC, DIP-8
针数:8Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.77Is Samacsys:N
模拟集成电路 - 其他类型:SWITCHING REGULATOR控制模式:VOLTAGE-MODE
最大输入电压:6 V最小输入电压:1.1 V
标称输入电压:2.5 VJESD-30 代码:R-PDIP-T8
JESD-609代码:e3功能数量:1
端子数量:8最高工作温度:85 °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:DIP
封装等效代码:DIP8,.3封装形状:RECTANGULAR
封装形式:IN-LINE认证状态:Not Qualified
座面最大高度:4.8 mm子类别:Switching Regulator or Controllers
表面贴装:NO切换器配置:BOOST
技术:BIPOLAR温度等级:OTHER
端子面层:Matte Tin (Sn)端子形式:THROUGH-HOLE
端子节距:2.54 mm端子位置:DUAL
宽度:7.62 mmBase Number Matches:1

ST779AC 数据手册

 浏览型号ST779AC的Datasheet PDF文件第2页浏览型号ST779AC的Datasheet PDF文件第3页浏览型号ST779AC的Datasheet PDF文件第4页浏览型号ST779AC的Datasheet PDF文件第5页浏览型号ST779AC的Datasheet PDF文件第6页浏览型号ST779AC的Datasheet PDF文件第7页 
ST777/778/779  
LOW VOLTAGE INPUT, 3-3.3V/5V/ADJUSTABLE OUTPUT  
DC-DC CONVERTER WITH SYNCHRONOUS RECTIFIER  
1V TO 6V INPUT GUARANTEES START-UP  
UNDER LOAD  
MAXIMUM OUTPUT CURRENT OF 300mA  
(778 OR 779 ADJUSTED TO 3V)  
LOAD FULLY DISCONNECTED IN  
SHUTDOWN  
TYPICAL EFFICIENCY OF 82%  
INTERNAL 1A POWER SWITCH AND  
SYNCHRONOUS RECTIFIER  
ADJUSTABLE CURRENT LIMIT ALLOWS  
DIP-8  
SO-8  
LOW-COST INDUCTORS  
SUPPLY CURRENT OF 270µA (NO LOAD)  
SHUTDOWN SUPPLY CURRENT 20µA  
PACKAGE AVAILABLE: DIP-8 AND SO-8  
Unlike others step-up DC-DC converters the  
ST777/778/779’s Sinchronous Rectifier turns off in  
the shutdown mode, fully disconnecting the output  
from the source. This eliminates the current drain  
associated with conventional step-up converters  
when off or in shutdown. Supply current is 270µA  
under no load and only 20µA in stand by mode.  
DESCRIPTION  
The ST777/778/779 are dc-dc converters that  
step-up from low voltage inputs requiring only  
three external components, an inductor (typically  
22µH) and two capacitors. The device include a  
Sinchronous Rectifier that eliminates the need for  
an external catch diode, and allows regulation  
even when the input is greater than the output.  
SCHEMATIC DIAGRAM  
22µH  
IN  
V
100µF  
RLIM  
1
2
5
IN  
ILIM  
LX  
DELAY  
TIMER  
OFF  
t
ACTIVE RECTIFIER  
6
4
OUT  
O
V
SWITCH  
DRIVER  
DELAY  
TIMER  
100µF  
RECTIFIER  
CONTROL  
tON  
PGND  
1 : N  
SEL  
8
1.25V  
VREF  
7
SHDN  
SHUTDOWN  
CONTROL  
AGND  
3
October 2002  
1/11  

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