LTC4364-1/LTC4364-2
Surge Stopper
with Ideal Diode
FEATURES DESCRIPTION
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Wide Operating Voltage Range: 4V to 80V
The LTC 4364 surge stopper with ideal diode controller
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Withstands Surges Over 80V with V Clamp
protects loads from high voltage transients. It limits and
CC
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Adjustable Output Clamp Voltage
regulates the output during an overvoltage event, such
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Ideal Diode Controller Holds Up Output Voltage
as load dump in automobiles, by controlling the voltage
During Input Brownouts
drop across an external N-channel MOSFET pass device.
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Reverse Input Protection to 40V
The LTC4364 also includes a timed, current limited circuit
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Reverse Output Protection to 20V
breaker. In a fault condition, an adjustable fault timer must
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Overcurrent Protection
expire before the pass device is turned off. The LTC4364-1
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Low 10A Shutdown Current at 12V
latches off the pass device while the LTC4364-2 automati-
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Adjustable Fault Timer
cally restarts after a delay. The LTC4364 precisely monitors
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0.1% Retry Duty Cycle During Faults (LTC4364-2)
the input supply for overvoltage (OV) and undervoltage
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Available in 4mm 3mm 14-Lead DFN, 16-Lead MSOP,
(UV) conditions. The external MOSFET is held off in un-
and 16-Lead SO Packages
dervoltage and auto-retry is disabled in overvoltage.
An integrated ideal diode controller drives a second MOS-
APPLICATIONS
FET to replace a Schottky diode for reverse input protec-
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Automotive/Avionic Surge Protection
tion and output voltage holdup. The LTC4364 controls the
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Hot Swap/Live Insertion
forward voltage drop across the MOSFET and minimizes
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Redundant Supply ORing
reverse current transients upon power source failure,
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Output Port Protection
brownout or input short.
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.
TYPICAL APPLICATION
Overvoltage Protector Regulates
Output at 27V During Input Transient
4A, 12V Overvoltage Output Regulator with Ideal Diode
C = 6.8F
92V INPUT SURGE TMR
Withstands 200V 1ms Transient at V
IN I = 0.5A
LOAD
V
IN
V
10m 20V/DIV
FDB33N25 FDB3682 OUT
V
IN
CLAMPED
12V
12V
+
AT 27V
383k
22F
27V CLAMP (ADJUSTABLE)
CMZ5945B
2.2k 6.8nF 10
V
OUT
12V
68V
20V/DIV
4364 TA01b
50ms/DIV
102k
V HGATE SOURCE DGATE SENSE OUT
CC
SHDN FB
Ideal Diode Holds Up Output
UV
4.99k
UV During Input Short
6V
LTC4364
90.9k
12V C = 6300F
LOAD
OV
ENOUT ENABLE INPUT SHORTED
I = 0.5A
OV
V LOAD
IN
60V
TO GND
FLT FAULT 10V/DIV
10k
GND TMR
436412 TA01a
0.22F
OUTPUT HELD UP
12V
V
OUT
10V/DIV
4364 TA01c
1ms/DIV
436412f
1LTC4364-1/LTC4364-2
ABSOLUTE MAXIMUM RATINGS (Notes 1, 2)
FB, TMR Voltages ..................................... 0.3V to 5.5V
Supply Voltage: V ................................. 40V to 100V
CC
Operating Ambient Temperature Range
SOURCE, OV, UV, SHDN Voltages ............. 40V to 100V
LTC4364C ................................................ 0C to 70C
DGATE, HGATE Voltages
LTC4364I .............................................40C to 85C
(Note 3) ..................... SOURCE 0.3V to SOURCE + 10V
LTC4364H .......................................... 40C to 125C
ENOUT, FLT Voltages ................................ 0.3V to 100V
Storage Temperature Range .................. 65C to 150C
OUT, SENSE Voltages.................................20V to 100V
Lead Temperature (Soldering, 10 sec)
Voltage Difference (SENSE to OUT) ............ 30V to 30V
MS, SO Packages .............................................300C
Voltage Difference (OUT to V ) ..............100V to 100V
CC
Voltage Difference (SENSE to SOURCE) ..100V to 100V
PIN CONFIGURATION
TOP VIEW
TOP VIEW
OUT 1 16
FB
OUT 1 14 FB TOP VIEW
SENSE 2 15
TMR
SENSE 2 13 TMR
OUT 1 16 FB
NC 3 14
SENSE 2 15 TMR ENOUT
DGATE 3 12 ENOUT
NC 3 14 ENOUT
DGATE 4 13
FLT
SOURCE 4 15 11 FLT DGATE 4 13 FLT
SOURCE 5 12 GND
SOURCE 5 12
HGATE 5 10 GND GND
HGATE 6 11 OV
V 6 9 OV
NC 7 10 UV HGATE 6 11
CC OV
V 8 9 SHDN
CC
SHDN 7 8 UV
NC 7 10
UV
MS PACKAGE
V 8 9
SHDN
16-LEAD PLASTIC MSOP CC
DE PACKAGE
14-LEAD (4mm 3mm) PLASTIC DFN T = 150C, = 120C/W
JMAX JA
S PACKAGE
T = 150C, = 45C/W
JMAX JA
16-LEAD PLASTIC SO
EXPOSED PAD (PIN 15) PCB GND CONNECTION OPTIONAL
T = 150C, = 100C/W
JMAX JA
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4364CDE-1#PBF LTC4364CDE-1#TRPBF 43641 14-Lead (4mm 3mm) Plastic DFN 0C to 70C
LTC4364IDE-1#PBF LTC4364IDE-1#TRPBF 43641 40C to 85C
14-Lead (4mm 3mm) Plastic DFN
LTC4364HDE-1#PBF LTC4364HDE-1#TRPBF 43641 14-Lead (4mm 3mm) Plastic DFN 40C to 125C
LTC4364CDE-2#PBF LTC4364CDE-2#TRPBF 43642 14-Lead (4mm 3mm) Plastic DFN 0C to 70C
LTC4364IDE-2#PBF LTC4364IDE-2#TRPBF 43642 14-Lead (4mm 3mm) Plastic DFN 40C to 85C
LTC4364HDE-2#PBF LTC4364HDE-2#TRPBF 43642 40C to 125C
14-Lead (4mm 3mm) Plastic DFN
LTC4364CMS-1#PBF LTC4364CMS-1#TRPBF 43641 16-Lead Plastic MSOP 0C to 70C
LTC4364IMS-1#PBF LTC4364IMS-1#TRPBF 43641 16-Lead Plastic MSOP 40C to 85C
LTC4364HMS-1#PBF LTC4364HMS-1#TRPBF 43641 16-Lead Plastic MSOP 40C to 125C
LTC4364CMS-2#PBF LTC4364CMS-2#TRPBF 43642 16-Lead Plastic MSOP 0C to 70C
LTC4364IMS-2#PBF LTC4364IMS-2#TRPBF 43642 16-Lead Plastic MSOP 40C to 85C
LTC4364HMS-2#PBF LTC4364HMS-2#TRPBF 43642 16-Lead Plastic MSOP 40C to 125C
436412f
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