LTC4380
Low Quiescent Current
Surge Stopper
FEATURES DESCRIPTION
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Low Quiescent Current: 8A Operating The LTC 4380 low quiescent current surge stopper protects
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Withstands Surge Voltage Up to the MOSFET Limit loads from high voltage transients. Overvoltage protection
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Wide Operating Voltage Range: 4V to 72V is provided by clamping the gate voltage of an external
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Overcurrent Protection N-channel MOSFET to limit the output voltage to a safe
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Selectable Internal 31.5V/50V or Adjustable Gate value during overvoltage events such as load dump in
Clamp Voltage automobiles. Fixed gate clamp voltages are selectable for
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Reverse Input Protection to 60V 12V and 24V/28V systems. For systems of any voltage up
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Adjustable Turn-On Threshold to 72V, use the adjustable gate clamp versions. Overcur-
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Adjustable Fault Timer with MOSFET Stress rent protection is also provided.
Acceleration
An internal multiplier generates a TMR pin current pro-
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Controls N-Channel MOSFET
portional to V and I , so that operating time in both
DS D
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Latchoff and Retry Options
overcurrent and overvoltage conditions is limited in ac-
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Low Retry Duty Cycle During Faults
cordance with MOSFET stress.
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10-Pin DFN (3mm 3mm) and MSOP Packages
n The GATE pin can drive back-to-back MOSFETs for reverse
AEC-Q100 Qualified for Automotive Applications
input protection, eliminating the voltage drop and dissi-
pation of a Schottky diode solution. A low 8A operating
APPLICATIONS
current permits use in always-on and battery powered
n applications. An accurate ON pin comparator monitors
Automotive/Avionic/Industrial Surge Protection
n the input supply for undervoltage (UV) conditions and
Hot Swap, Live Insertion
n also serves as a shutdown input, reducing the quiescent
High Side Switch for Battery Powered Systems
n current to 6A.
Automotive Load Dump Protection
All registered trademarks and trademarks are the property of their respective owners. Protected
by U.S. patents, including 9634481.
TYPICAL APPLICATION
12V, 1A with 250V Overvoltage Protection Surge Stopper Limits Output to 27V During Input Surge
20m
FDB33N25 12V/1A
V C = 8.2F
IN TMR
100V INPUT SURGE
OUTPUT CLAMPED
12V I = 1A
LOAD
AT 27V
(250V )
22F
PK
10
33
249k
10k
47nF
V
IN
DRN GATE SNS OUT
20V/DIV
12V
V
CC
LTC4380-2
FLT V
OUT
0.1F 12V
ON
20V/DIV
GND TMR SEL
27V ADJUSTABLE CLAMP
68V
8.2F
CMHZ5266B
4380 TA01b
100ms/DIV
4380 TA01a
Rev. C
1
Document Feedback For more information www.analog.comLTC4380
ABSOLUTE MAXIMUM RATINGS (Notes 1, 2)
V , ON, SEL ............................................... 60V to 80V FLT ............................................................. 0.3V to 80V
CC
DRN (Note 3), SNS, OUT I .......................................................................2.5mA
DRN
LTC4380-1/LTC4380-2........................... 0.3V to 53V Operating Ambient Temperature Range
LTC4380-3/LTC4380-4 .......................... 0.3V to 80V LTC4380C ................................................ 0C to 70C
SNS to OUT ..................................................... 5V to 5V LTC4380I .............................................40C to 85C
GATE (Note 4) LTC4380H .......................................... 40C to 125C
LTC4380-1/LTC4380-2........................... 0.3V to 53V Storage Temperature Range .................. 65C to 150C
LTC4380-3/LTC4380-4 .......................... 0.3V to 86V Lead Temperature (Soldering, 10 sec)
GATE to OUT, GATE to V (Note 4) ........... 0.3V to 10V MSOP ...............................................................300C
CC
TMR ............................................................. 0.3V to 5V
PIN CONFIGURATION
TOP VIEW
TOP VIEW
DRN 1 10 TMR
DRN 1 10 TMR
V 2 9 ON
CC
V 2 9 ON
11
CC
GATE 3 8 GND
GATE 3 8 GND
GND
SNS 4 7 FLT SNS 4 7 FLT
OUT 5 6 SEL
OUT 5 6 SEL
MS PACKAGE
10-LEAD PLASTIC MSOP
DD PACKAGE
T = 150C, = 160C/W
10-LEAD (3mm 3mm) PLASTIC DFN
JMAX JA
T = 135C, = 43C/W
JMAX JA
EXPOSED PAD (PIN 11) IS GND, PCB CONNECTION OPTIONAL
Rev. C
2
For more information www.analog.com