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LTC1514CS8-3.3 PDF预览

LTC1514CS8-3.3

更新时间： 2024-10-30 22:34:35
品牌 Logo 应用领域
凌特 - Linear 转换器电池比较器开关
页数 文件大小 规格书
8页 239K
描述
Step-Up/Step-Down Switched Capacitor DC/DC Converters with Low-Battery Comparator

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LTC1514CS8-3.3 数据手册

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LTC1514-3.3/LTC1514-5  
Step-Up/Step-Down Switched  
Capacitor DC/DC Converters  
with Low-Battery Comparator  
U
FEATURES  
DESCRIPTION  
TheLTC®1514-3.3/LTC1514-5aremicropowerswitched  
capacitor DC/DC converters that produce a regulated  
output voltage by either stepping up or stepping down  
the input voltage. Output voltage is fixed at either 3.3V  
(LTC1514-3.3) or 5V (LTC1514-5) by an internal resistor  
divider.  
■
3.3V or 5V Output Voltages  
■
2V to 10V Input Voltage Range  
■
Up to 50mA Output Current  
■
■
■
■
■
■
■
■
■
Only Three External Capacitors Required  
Soft Start Limits Inrush Current at Turn-On  
Low Operating Current: 60µA  
Low Shutdown Current: 10µA  
A unique architecture allows the parts to accommodate  
a wide input voltage range (2V to 10V) while maintaining  
±4% regulation. Additional circuitry prevents excessive  
inrush current and output voltage ripple when large VIN  
to VOUT differentials are present.  
Shutdown Disconnects Load from VIN  
Short-Circuit and Overtemperature Protected  
650kHz Switching Frequency  
Low-Battery Comparator Active in Shutdown  
Available in SO-8 Package  
An internal uncommitted comparator is kept active in  
shutdown. The comparator has an open-drain output for  
flexible interfacing.  
U
APPLICATIONS  
■
Battery-Operated Equipment  
The parts are short-circuit and overtemperature pro-  
tected. Battery life is maximized by very low operating  
currents (ICC = 60µA typ, 10µA in shutdown). Both parts  
are available in an SO-8 package.  
■
Smart Card Readers  
■
Local Power Supplies  
■
Handheld Instruments  
■
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Battery Backup Supplies  
U
TYPICAL APPLICATION  
LTC1514-5 Output Voltage  
vs Input Voltage  
5V Step-Up/Step-Down Power Supply with Low-Battery Detect  
5.2  
I
= 10mA  
100k  
OUT  
1.33M  
1%  
LTC1514-5  
SHDN  
5.1  
5.0  
4.9  
4.8  
1
2
3
4
8
7
6
5
V
= 5V  
OUT  
OUT  
V
ON OFF  
LOW BAT  
OUT  
I
= 50mA  
LBO  
LBI  
V
IN  
+
+
V
10µF  
C1  
C1  
IN  
0.22µF  
4-CELL  
NiCd  
+
499k  
1%  
–
GND  
10µF  
1514 TA01  
2
3
4
5
6
7
8
9
10  
INPUT VOLTAGE (V)  
LT1514 • TA02  
1
12345678

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LTC1514CS8-3.3 替代型号

型号 品牌 替代类型 描述 数据表
LTC1514CS8-3.3#PBF Linear

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