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LTC1515CS8-3.3/5 PDF预览

LTC1515CS8-3.3/5

更新时间： 2024-11-04 22:37:23
品牌 Logo 应用领域
凌特 - Linear 转换器开关
页数 文件大小 规格书
8页 236K
描述
Step-Up/Step-Down Switched Capacitor DC/DC Converters with Reset

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LTC1515CS8-3.3/5 数据手册

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LTC1515 Series  
Step-Up/Step-Down  
Switched Capacitor DC/DC  
Converters with Reset  
U
DESCRIPTION  
FEATURES  
■
Adjustable/Selectable 3V, 3.3V or 5V  
The LTC®1515, LTC1515-3/5 and LTC1515-3.3/5 are  
micropower switched capacitor DC/DC converters that  
produce a regulated output voltage by either stepping up  
or stepping down the input voltage. Output voltage is  
adjustable using an external resistor divider (LTC1515) or  
programmable to either 3V/5V (LTC1515-3/5) or 3.3V/5V  
(LTC1515-3.3/5) using a logic pin.  
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  
■
Very Low Shutdown Current: < 1µA  
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  
■
VOUT Programmable to 3V/5V or 3.3V/5V  
■
Short-Circuit and Overtemperature Protected  
■
650kHz Switching Frequency  
■
Open-Drain Power-On Reset Output  
■
Daisy-Chained Control Outputs  
An internal power-on reset circuit forces the POR pin low  
on initial power-up. The POR output remains low until  
200ms (typ) after VOUT is in regulation.  
Available in SO-8 Package  
U
APPLICATIONS  
Thepartsareshort-circuitandovertemperatureprotected.  
Battery life is maximized by very low operating currents  
(ICC = 60µA typ, ICC < 1µA in shutdown). All three parts are  
available in an SO-8 package.  
■
SIM Interface in GSM Cellular Telephones  
■
Smart Card Readers  
■
Local Power Supplies  
Portable Equipment  
■
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATION  
LTC1515-X 5V Output vs Input Voltage  
Programmable 3.3V/5V Power Supply with Power-On Reset  
5.2  
100k  
I
= 10mA  
OUT  
5/3 = 3V  
1
2
3
4
8
7
6
5
V
= 3.3V OR 5V  
= 50mA  
OUT  
OUT  
5.1  
5.0  
4.9  
4.8  
SHDN  
POR  
LTC1515-3.3/5  
5/3  
V
OUT  
ON OFF  
RESET  
I
V
IN  
+
+
+
V
IN  
10µF  
10µF  
4-CELL  
NiCd  
5V 3.3V  
C1  
0.22µF  
–
GND  
C1  
LTC1515 • TA01  
2
3
4
5
6
7
8
9
10  
INPUT VOLTAGE (V)  
LT1515 • TA02  
1
12345678

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LTC1515CS8-3.3/5 替代型号

型号 品牌 替代类型 描述 数据表
LTC1515IS8-3.3/5#TRPBF Linear

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