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LT4356HS-1#PBF

Description
IC SURGE STOPPER ADJ 16-SOIC
CategoryPower/power management    The power supply circuit   
File Size470KB,26 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric View All

LT4356HS-1#PBF Overview

IC SURGE STOPPER ADJ 16-SOIC

LT4356HS-1#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
Parts packaging codeSOIC
package instructionSOP, SOP16,.25
Contacts16
Manufacturer packaging codeS
Reach Compliance Codecompliant
ECCN codeEAR99
Adjustable thresholdYES
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeR-PDSO-G16
JESD-609 codee3
length9.9 mm
Humidity sensitivity level1
Number of channels1
Number of functions1
Number of terminals16
Maximum operating temperature125 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP16,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)260
power supply12 V
Certification statusNot Qualified
Maximum seat height1.752 mm
Maximum supply current (Isup)1.5 mA
Maximum supply voltage (Vsup)80 V
Minimum supply voltage (Vsup)4 V
Nominal supply voltage (Vsup)12 V
surface mountYES
technologyCMOS
Temperature levelAUTOMOTIVE
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width3.9 mm
Base Number Matches1
LT4356-1/LT4356-2
Surge Stopper
FeAtures
n
n
n
n
n
n
n
n
n
n
n
n
Description
The
LT
®
4356
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 con-
tinue functioning. The LT4356 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 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.
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. A shutdown pin reduces the quiescent current
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.
n
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, LT4356-1
Adjustable Fault Timer
Controls N-channel MOSFET
Shutdown Pin Withstands –60V to 100V
Fault Output Indication
Guaranteed Operation to 125°C
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
ApplicAtions
n
n
n
n
Automotive/Avionic Surge Protection
Hot Swap/Live Insertion
High Side Switch for Battery Powered Systems
Intrinsic Safety Applications
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and No
R
SENSE
and ThinSOT are trademarks of Analog Devices, Inc. All other trademarks are the
property of their respective owners.
typicAl ApplicAtion
4A, 12V Overvoltage Output Regulator
V
IN
12V
10m
IRLR2908
V
OUT
Overvoltage Protector Regulates Output at
27V During Transient
80V INPUT SURGE
C
TMR
= 6.8µF
I
LOAD
= 500mA
10
383k
V
CC
SHDN
IN
+
100k
UNDERVOLTAGE
A
OUT
LT4356DE
EN
GND
TMR
FLT
4356 TA01
102k
OUT
FB
4.99k
V
CC
DC-DC
CONVERTER
SHDN
GND
FAULT
V
OUT
20V/DIV
V
IN
20V/DIV
SNS
GATE
12V
27V ADJUSTABLE CLAMP
12V
100ms/DIV
4356 TA01b
0.1µF
4356fb
For more information
www.linear.com/LT4356-1
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