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Surge Stoppers
ADJUSTABLE
V
TIMER
OUT
SNSFBGATE
V
CC
LT4363
R
LT4363 High Voltage Surge Stopper with Current Limit
In harsh industrial, automotive and avionic environments, systems must continue operating reliably through severe overvoltage events.
The LT®4363 builds on the first-generation LT4356 by extending overvoltage protection capabilities beyond 100V, without sacrificing
overcurrent protection. Additional features include OV/UV monitoring, fast overcurrent limit and extended cooldown period.
V
4V TO 80V
IN
SNS
V
OUT
ADJUSTABLE
CLAMP
V
100V/DIV
V
OUT
20V/DIV
250V INPUT SURGE
IN
28V
43V CLAMP
28V
100ms/DIV
LTC4366 Floating Surge Stopper
The LTC®4366’s adjustable floating topology is capable of extremely high voltages; the operational upper voltage is limited only
by MOSFET ratings. During high voltage transient events, the LTC4366 clamps the output to a user-defined voltage, while the fault
timer ensures safe shutdown of the MOSFET if the fault persists.
9V TO >500V
RUGGED
FLOATING
TOPOLOGY
IN
LTC4366
REF+
–
R
BIAS
V
OUT
CLAMP
V
200V/DIV
V
OUT
100V/DIV
800V INPUT SURGE
IN
160V
200V CLAMP
160V
20ms/DIV
Part
Number
Operating
Range VIN Max
Reverse
Protection
Overcurrent
Protection Comments Package Options
LT4356 4V to 80V 100V –60V Yes, <100V Surge Stopper with Auxiliary Amplifier 4mm × 3mm DFN, MSOP-10, SO-16
LT4363 4V to 80V 100V –60V Yes, >100V High Voltage Surge Stopper with Current Limit 4mm × 3mm DFN, MSOP-12, SO-16
LTC4364 4V to 80V 100V –40V Yes, >100V Surge Stopper with Ideal Diode 4mm × 3mm DFN, MSOP-16, SO-16
LTC4365 2.5V to 34V 60V –40V No UV, OV and Reverse Supply Protection Controller 3mm × 2mm DFN, TSOT-8
LTC4366 9V to >500V Unlimited Yes No Floating Surge Stopper 3mm × 2mm DFN, TSOT-8
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.
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LTC4364 High Voltage Surge Stopper with Ideal Diode
The LTC4364 adds the ideal diode function along with reverse output protection to the LT4363. The ideal diode protects the load
from a reversed battery, holds up the output during an input brownout, and facilitates diode-ORing.
LTC4365 UV, OV and Reverse Supply Protection Controller
VIN OPERATING RANGE:
2.5V TO 34V
PROTECTS 60V TO –40V
NO TVS REQUIRED
0V/UV THRESHOLDS
Protection to –40V
10µA Shutdown
ADJUSTABLE
Reverse Input
V
IN
4V to 80V
Current
SHDN
UV
OV
GATE
V
IN
LTC4365
SHDN
UV
GND
OV
>80V Surge
Protection
V
OUT
FAULT
Ideal Diode for
Output Hold-Up and
Reverse Protection
LTC4364
TIMER
V
OUT
Window
10V/DIV
Valid
–30V
30V
GND
Overcurrent
Protection
FB
UV = 3.5V
OV = 18V
V
OUT
V
IN
Output Port
Protection to –20V
V
OUT
Adjustable
Output Clamp
ENABLE
FA U LT
V
IN
V
OUT
Features
n
Low Operating Current: 125μA
n
Low Shutdown Current: 10μA
n
Blocks 50Hz and 60Hz AC Power
n
–40°C to 125°C Operation
n
8-Lead, 3mm × 2mm DFN and TSOT-23 Packages
www.linear.com/surgestoppers n 1-800-4-LINEAR
1s/DIV
0712A
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