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LT4356HMS-1-TR PDF预览

LT4356HMS-1-TR

更新时间： 2024-11-07 05:43:35
品牌 Logo 应用领域
凌特 - Linear 稳压器限制器
页数 文件大小 规格书
20页 220K
描述
Overvoltage Protection Regulator and Inrush Limiter

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LT4356HMS-1-TR 数据手册

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LT4356-1  
Overvoltage Protection  
Regulator and Inrush Limiter  
FEATURES  
DESCRIPTION  
The LT®4356-1 surge stopper protects loads from high  
voltage 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  
loadstocontinuefunctioning.TheLT4356-1alsomonitors  
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  
n
Adjustable Fault Timer  
the voltage drop between the V and SNS pins to protect  
CC  
n
Controls N-Channel MOSFET  
against 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  
impending power down. If the condition persists, the  
MOSFET is turned off.  
n
Shutdown Pin Withstands –60V to 100V  
n
Fault Output Indication  
n
Spare Amplifier for Level Detection Comparator or  
Linear Regulator Controller  
n
Available in (4mm × 3mm) 12-Pin DFN or 10-Pin  
MSOP Packages  
The spare 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 during shutdown.  
Automotive/Avionic Surge Protection  
n
Hot Swap/Live Insertion  
n
High Side Switch for Battery Powered Systems  
L, LT, LTC and LTM 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  
80V INPUT SURGE  
10Ω  
102k  
V
IN  
V
SNS GATE OUT  
FB  
20V/DIV  
CC  
383k  
V
CC  
SHDN  
12V  
12V  
4.99k  
27V CLAMP  
DC-DC  
+
IN  
LT4356DE-1  
V
OUT  
CONVERTER  
20V/DIV  
100k  
EN  
SHDN  
GND  
UNDERVOLTAGE  
A
FLT  
FAULT  
43561 TA01b  
OUT  
GND  
TMR  
100ms/DIV  
43561 TA01  
0.1μF  
43561fd  
1
1234567...20

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