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LT4356IDE-1#PBF

Description
Surge Suppressors Overvoltage Protection Regulator with Auto-retry
CategoryPower/power management    The power supply circuit   
File Size470KB,26 Pages
ManufacturerADI
Websitehttps://www.analog.com
Environmental Compliance
Download Datasheet Parametric View All

LT4356IDE-1#PBF Overview

Surge Suppressors Overvoltage Protection Regulator with Auto-retry

LT4356IDE-1#PBF Parametric

Parameter NameAttribute value
Brand NameAnalog Devices Inc
Is it lead-free?Contains lead
Is it Rohs certified?conform to
MakerADI
package instructionVSON,
Contacts12
Manufacturer packaging code05-08-1695
Reach Compliance Codecompliant
Adjustable thresholdYES
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeR-PDSO-N12
JESD-609 codee3
length4 mm
Humidity sensitivity level1
Number of channels1
Number of functions1
Number of terminals12
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeVSON
Package shapeRECTANGULAR
Package formSMALL OUTLINE, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height0.8 mm
Maximum supply voltage (Vsup)80 V
Minimum supply voltage (Vsup)4 V
Nominal supply voltage (Vsup)12 V
surface mountYES
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceMATTE TIN (SN)
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width3 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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