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LTC1514IS8-3.3#TRPBF

更新时间： 2024-11-01 13:09:43
品牌 Logo 应用领域
凌特 - Linear 转换器稳压器开关式稳压器或控制器电源电路电池比较器开关式控制器光电二极管
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LTC1514IS8-3.3#TRPBF 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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LTC1514IS8-3.3#TRPBF 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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