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LT4356IDE-2

更新时间： 2024-11-10 01:04:47
品牌 Logo 应用领域
Linear Systems /
页数 文件大小 规格书
26页 241K
描述
Surge Stopper

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中文翻译

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LT4356IDE-2 数据手册

 浏览型号LT4356IDE-2的Datasheet PDF文件第2页浏览型号LT4356IDE-2的Datasheet PDF文件第3页浏览型号LT4356IDE-2的Datasheet PDF文件第4页浏览型号LT4356IDE-2的Datasheet PDF文件第5页浏览型号LT4356IDE-2的Datasheet PDF文件第6页浏览型号LT4356IDE-2的Datasheet PDF文件第7页 
LT4356-1/LT4356-2  
Surge Stopper  
FEATURES  
DESCRIPTION  
TheLT®4356surgestopperprotectsloadsfromhighvoltage  
transients. It regulates the output during an overvoltage  
event, such as load dump in automobiles, by controlling  
the gate of an external N-channel MOSFET. The output is  
limited to a safe value thereby allowing the loads to con-  
tinue functioning. The LT4356 also monitors the voltage  
n
Stops High Voltage Surges  
n
Adjustable Output Clamp Voltage  
n
Overcurrent Protection  
n
Wide Operation Range: 4V to 80V  
n
Reverse Input Protection to –60V  
n
Low 7μA Shutdown Current, LT4356-1  
n
Adjustable Fault Timer  
Controls N-channel MOSFET  
drop between the V and SNS pins to protect against  
CC  
n
overcurrent faults. An internal amplifier limits the current  
sense voltage to 50mV. In either fault condition, a timer  
is started inversely proportional to MOSFET stress. If the  
timer expires, the FLT pin pulls low to warn of an impend-  
ing power down. If the condition persists, the MOSFET is  
turned off. After a cool down period, the GATE pin pulls  
up turning on the MOSFET again.  
n
Shutdown Pin Withstands –60V to 100V  
Fault Output Indication  
Guaranteed Operation to 125°C  
n
n
n
Auxiliary Amplifier for Level Detection Comparator or  
Linear Regulator Controller  
n
Available in (4mm × 3mm) 12-Pin DFN,  
10-Pin MSOP or 16-Pin SO Packages  
The auxiliary amplifier may be used as a voltage detection  
comparator or as a linear regulator controller driving an  
external PNP pass transistor.  
APPLICATIONS  
n
Back-to-back FETs can be used in lieu of a Schottky diode  
for reverse input protection, reducing voltage drop and  
powerloss. Ashutdownpinreducesthequiescentcurrent  
to less than 7μA for the LT4356-1 during shutdown. The  
LT4356-2 differs from the LT4356-1 during shutdown by  
reducing the quiescent current to 60μA and keeping alive  
the auxiliary amplifier for uses such as an undervoltage  
lockout or always-on regulator.  
Automotive/Avionic Surge Protection  
n
Hot Swap/Live Insertion  
n
High Side Switch for Battery Powered Systems  
Intrinsic Safety Applications  
n
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  
4A, 12V Overvoltage Output Regulator  
Overvoltage Protector Regulates Output at  
27V During Transient  
10mΩ  
IRLR2908  
V
OUT  
V
IN  
12V  
C
= 6.8μF  
= 500mA  
80V INPUT SURGE  
TMR  
I
LOAD  
10Ω  
102k  
V
IN  
V
SNS GATE OUT  
FB  
CC  
20V/DIV  
383k  
V
CC  
SHDN  
4.99k  
12V  
12V  
DC-DC  
27V ADJUSTABLE CLAMP  
100ms/DIV  
+
IN  
LT4356DE  
CONVERTER  
V
OUT  
20V/DIV  
100k  
EN  
SHDN  
GND  
UNDERVOLTAGE  
A
FLT  
FAULT  
OUT  
GND  
TMR  
4356 TA01b  
4356 TA01  
0.1μF  
4356fa  
1
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