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LTC1261L

更新时间： 2024-09-24 14:57:31
品牌 Logo 应用领域
亚德诺 - ADI 开关电容器转换器
页数 文件大小 规格书
14页 2582K
描述
开关电容器稳压负输出转换器

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中文翻译

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LTC1261L 数据手册

 浏览型号LTC1261L的Datasheet PDF文件第2页浏览型号LTC1261L的Datasheet PDF文件第3页浏览型号LTC1261L的Datasheet PDF文件第4页浏览型号LTC1261L的Datasheet PDF文件第5页浏览型号LTC1261L的Datasheet PDF文件第6页浏览型号LTC1261L的Datasheet PDF文件第7页 
LTC1261L  
Switched Capacitor  
Regulated Voltage Inverter  
FEATURES  
DESCRIPTION  
The LTC®1261L is a switched-capacitor voltage inverter  
designed to provide a regulated negative voltage from a  
single positive supply. The LTC1261L operates from a  
single 2.7V to 5.25V supply and provides an adjustable  
output voltage from –1.23V to –5V. The LTC1261L-4/  
LTC1261L-4.5 needs a single 4.5V to 5.25V supply and  
provides a fixed output voltage of –4V to –4.5V respec-  
tively.Threeexternalcapacitorsarerequired:a0.1µFflying  
capacitor and an input and output bypass capacitors. An  
optional compensation capacitor at ADJ (COMP) can be  
used to reduce the output voltage ripple.  
n
Regulated Negative Voltage from a  
Single Positive Supply  
n
REG Pin Indicates Output is in Regulation  
n
Adjustable or Fixed Output Voltages  
Output Regulation: 4.5%  
Supply Current: 650µA Typ  
n
n
n
Shutdown Mode Drops Supply Current to 5µA  
n
Up to 20mA Output Current  
n
Requires Only Three or Four External Capacitors  
n
Available in MS8 and SO-8 Packages  
Each version of the LTC1261L will supply up to 20mA  
outputcurrentwithguaranteedoutputregulationof 4.5%.  
The LTC1261L includes an open-drain REG output that  
pulls low when the output is within 5% of the set value.  
Quiescent current is typically 650µA when operating and  
5µA in shutdown.  
APPLICATIONS  
n
GaAs FET Bias Generators  
n
Negative Supply Generators  
n
Battery-Powered Systems  
n
Single Supply Applications  
TheLTC1261Lisavailablein 8-pinMSOPandSOpackages.  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
TYPICAL APPLICATION  
Waveforms for –4V Generator with Power Valid  
–4V Generator with Power Valid  
0V  
5V  
OUT  
1
2
3
4
8
7
6
5
5V  
V
SHDN  
REG  
CC  
+
10k  
–4V  
C1  
POWER VALID  
C1  
1µF  
C2  
0.1µF  
5V  
SHDN  
0V  
LTC1261L-4  
V
= –4V  
–
OUT  
C1  
OUT  
AT 10mA  
C4  
3.3µF  
+
GND  
COMP  
5V  
POWER VALID  
0V  
C3*  
100pF  
1261L TA01  
*OPTIONAL  
1261L TA02  
0.1ms/DIV  
1261lfa  
1
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