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LTC3255IMSE#PBF

更新时间： 2024-11-05 21:19:51
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凌特 - Linear /
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LTC3255IMSE#PBF 数据手册

 浏览型号LTC3255IMSE#PBF的Datasheet PDF文件第2页浏览型号LTC3255IMSE#PBF的Datasheet PDF文件第3页浏览型号LTC3255IMSE#PBF的Datasheet PDF文件第4页浏览型号LTC3255IMSE#PBF的Datasheet PDF文件第5页浏览型号LTC3255IMSE#PBF的Datasheet PDF文件第6页浏览型号LTC3255IMSE#PBF的Datasheet PDF文件第7页 
LTC3255  
Wide V Range  
IN  
Fault Protected 50mA  
Step-Down Charge Pump  
FEATURES  
DESCRIPTION  
The LTC®3255 is a switched-capacitor step-down DC/DC  
converter that produces a regulated output (2.4V to 12.5V  
adjustable) from a 4V to 48V input. In applications where  
the input voltage exceeds twice the output voltage, 2:1  
capacitivechargepumpingextendsoutputcurrentcapabil-  
ity beyond input supply current limits. At no load, Burst  
n
Input Voltage Range: 4V to 48V  
n
Adjustable Regulated Output: 2.4V to 12.5V  
n
Output Current: 50mA Maximum  
n
16μA Quiescent Current in Regulation at No Load  
n
Input Fault Protection from –52V to 60V  
n
Multimode Charge Pump (2:1, 1:1) with Automatic  
Mode Switching Maintains Regulation Over Wide  
Mode® operation cuts V quiescent current to 16µA.  
IN  
V Range  
IN  
With its integrated V shunt regulator, the LTC3255  
IN  
n
n
n
n
n
Input Voltage Shunt Mode for Current-Fed Applications  
excels in 4mA to 20mA current loop applications. The  
device enables current multiplication; a 4mA input current  
can power a 7.4mA load continuously. Alternatively, the  
LTC3255 serves as a higher efficiency replacement for  
linear regulators and provides a space-saving inductor-  
free alternative to buck DC/DC converters.  
Power Good Output  
Overtemperature and Short-Circuit Protection  
Operating Junction Temperature: 150°C Maximum  
Thermally Enhanced 10-Lead MSOP and 10-Lead  
(3mm × 3mm) DFN packages  
APPLICATIONS  
The LTC3255 withstands reverse-polarity input supplies  
and output short-circuits without damage. Safety features  
including current limit and overtemperature protection  
further enhance robustness. The LTC3255 is available in  
thermally enhanced 10-lead MSOP and low profile 3mm  
× 3mm 10-lead DFN packages.  
n
Industrial Control, Factory Automation, Sensors, and  
SCADA Systems  
n
Housekeeping Power Supplies  
n
Current-Boosting Voltage Regulators for 4mA to  
20mA Current Loops  
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks  
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the  
property of their respective owners.  
TYPICAL APPLICATION  
Available Output Current  
vs Input Current  
7.4mA DC Supply from 4mA to 20mA Current Loop  
40  
37  
34  
1µF  
OUTPUT  
+
–
31  
C
C
+
3.3V  
V
V
OUT  
IN  
28  
7.4mA  
AVAILABLE  
EN  
LTC3255  
220k  
PGOOD  
25  
22  
19  
16  
13  
10  
7
INCREASED  
CAPABILITY  
I
OUT  
I
OUT  
PGOOD  
FB  
4mA TO 20mA INPUT  
>10V COMPLIANCE  
1µF  
10µF  
SHUNT  
BIAS  
2.15M  
1.21M  
GND  
INPUT  
CURRENT  
0.1µF  
3255 TA01a  
–
4
4
6
8
10 12 14 16 18 20  
INPUT CURRENT (mA)  
3255 TA01b  
3255f  
1
For more information www.linear.com/LTC3255  
1234567...16

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LTC3255IMSE#PBF 替代型号

型号 品牌 替代类型 描述 数据表
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