参数资料
型号: LT4356IS-3#PBF
厂商: Linear Technology
文件页数: 1/24页
文件大小: 0K
描述: IC SURGE STOPPER W/LATCH 16SOIC
产品目录绘图: LT4356 Output Graph
LT4356 Series 16-SOIC
标准包装: 50
电压 - 工作: 4 ~ 80V
电压 - 箝位: 27V,可调
技术: 混合技术
电路数: 1
应用: 自动
封装/外壳: 16-SOIC(0.154",3.90mm 宽)
供应商设备封装: 16-SOIC
包装: 管件
产品目录页面: 2388 (CN2011-ZH PDF)
配用: DC1018B-C-ND - DEMO BOARD FOR LT4356-3
DC1018B-B-ND - DEMO BOARD FOR LT4356-2
DC1018B-A-ND - DEMO BOARD FOR LT4356-1

LT4356-3
Surge Stopper with
Fault Latchoff
FEATURES
DESCRIPTION
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Stops High Voltage Surges
Adjustable Output Clamp Voltage
Overcurrent Protection
Wide Operation Range: 4V to 80V
Reverse Input Protection to –60V
Low 7μA Shutdown Current
Adjustable Latchoff Fault Timer
Controls N-channel MOSFET
Shutdown Pin Withstands –60V to 100V
Fault Output Indication
Auxiliary Amplifier for Level Detection Comparator or
Linear Regulator Controller
Available in (4mm × 3mm) 12-Pin DFN,
10-Pin MSOP or 16-Pin SO Packages
The LT ? 4356-3 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
loads to continue functioning. The LT4356-3 also monitors
the voltage drop between the V CC and SNS pins to protect
against overcurrent faults. An internal amplifier limits
the current sense voltage to 50mV. In either fault condi-
tion, 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, until the SHDN pin pulls low
momentarily.
Automotive/Avionic Surge Protection
Hot Swap/Live Insertion
High Side Switch for Battery Powered Systems
Intrinsic Safety Applications
APPLICATIONS
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L , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
Hot Swap, No R SENSE and ThinSOT are trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
TYPICAL APPLICATION
The auxiliary amplifier may be used as a voltage detection
comparator or as a linear regulator controller driving an
external PNP pass transistor.
Back-to-back FETs can be used in lieu of a Schottky diode
for reverse input protection, reducing voltage drop and
power loss. The SHDN input turns off the part, including
the auxiliary amplifier, and reduces the quiescent current
to less than 7μA.
V OUT
V IN
12V
4A, 12V Overvoltage Output Regulator
10m IRLR2908
Overvoltage Protector Regulates Output at
27V During Transient
80V INPUT SURGE C TMR = 6.8μF
I LOAD = 500mA
383k
V CC
SNS
10
GATE
OUT
102k
V IN
20V/DIV
100k
UNDERVOLTAGE
SHDN
IN +
A OUT
LT4356DE-3
GND
TMR
FB
EN
FLT
4.99k
FAULT
V CC
DC-DC
CONVERTER
SHDN GND
V OUT
20V/DIV
12V
12V
27V ADJUSTABLE CLAMP
100ms/DIV
LT4356-3TA01b
43563 TA01
0.1μF
43563fb
1
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