LTC4366 Stopper Datasheet

LTC4366 Datasheet, PDF, Equivalent


Part Number

LTC4366

Description

High Voltage Surge Stopper

Manufacture

Linear

Total Page 24 Pages
Datasheet
Download LTC4366 Datasheet


LTC4366
LTC4366
High Voltage Surge Stopper
FEATURES
nn Rugged Floating Topology
nn Wide Operating Voltage Range: 9V to >500V
nn Adjustable Output Clamp Voltage
nn Controls N-Channel MOSFET
nn Adjustable Protection Timer
nn Internal 9-Second Cool-Down Timer
nn Shutdown IQ < 14µA
nn 8-Lead TSOT and 3mm × 2mm DFN Packages
APPLICATIONS
nn Industrial, Automotive and Avionic Surge Protection
nn High Voltage DC Distribution
nn 28V Vehicle Systems
DESCRIPTION
The LTC®4366 surge stopper protects loads from high
voltage transients. By controlling the gate of an external
N-channel MOSFET, the LTC4366 regulates the output
during an overvoltage transient. The load may remain
operational while the overvoltage is dropped across the
MOSFET. Placing a resistor in the return line isolates the
LTC4366 and allows it to float up with the supply; therefore,
the upper limit on the output voltage depends only on the
availability of high valued resistors and MOSFET ratings.
An adjustable overvoltage timer prevents MOSFET dam-
age during the surge while an additional 9-second timer
provides for MOSFET cool down. A shutdown pin reduces
the quiescent current to less than 14µA during shutdown.
After a fault the LTC4366-1 latches off while the LTC4366‑2
will auto-retry.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners. Patents pending.
TYPICAL APPLICATION
Overvoltage Protected 1.5A, 28V Supply
VIN IXTK90N25L2
28V
10Ω
324k
2nF
VDD
SD
GATE
LTC4366-2
OUT
FB
TIMER
VSS
1µF
BASE
46.4k
VOUT
1.5A
0.47µF
12.4k
422k
436612 TA01a
Overvoltage Protector Regulates Output at 43V During Transient
250V INPUT SURGE
VIN
100V/DIV
28V
VOUT
20V/DIV
28V
43V CLAMP
100ms/DIV
436612 TA01b
For more information www.linear.com/LTC4366
436612fe
1

LTC4366
LTC4366
ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) All voltages relative to VSS, unless otherwise noted.
Supply Voltage (VDD) ................................. –0.3V to 10V
Supply Voltage (OUT) .................................. –0.3V to 5V
Input Voltages
FB............................................... –0.3V to OUT + 0.3V
TIMER.................................................... –0.3V to 3.5V
SD........................................................... –0.3V to 10V
Output Voltages
BASE..........................................................–1.5V to 4V
OUT – BASE .......................................... –0.3V to 5.5V
GATE (Note 3)......................................... –0.3V to 15V
GATE – OUT (Note 3).............................. –0.3V to 10V
Currents
IVDD....................................................................10mA
IOUT ....................................................................10mA
BASE.................................................. –300µA to 10µA
SD........................................................–10mA to 10µA
Operating Ambient Temperature Range (Note 4)
LTC4366C................................................. 0°C to 70°C
LTC4366I..............................................–40°C to 85°C
LTC4366H........................................... –40°C to 125°C
LTC4366MP........................................ –55°C to 125°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
TSOT-23 Package Only..................................... 300°C
PIN CONFIGURATION
TOP VIEW
VDD 1
SD 2
TIMER 3
VSS 4
8 GATE
7 OUT
6 FB
5 BASE
TS8 PACKAGE
8-LEAD PLASTIC TSOT-23
TJMAX = 150°C, θJA = 195°C/W
TOP VIEW
VSS 1
8 BASE
TIMER 2
7 FB
SD 3 9 6 OUT
VDD 4
5 GATE
DDB PACKAGE
8-LEAD (3mm × 2mm) PLASTIC DFN
TJMAX = 150°C,
θJA = 75°C/W IF VSS IS SOLDERED TO PCB, θJA = 135°C/W IF VSS IS NOT SOLDERED TO PCB
EXPOSED PAD (PIN 9), PCB VSS CONNECTION OPTIONAL
2
For more information www.linear.com/LTC4366
436612fe


Features LTC4366 High Voltage Surge Stopper FEAT URES nn Rugged Floating Topology nn Wid e Operating Voltage Range: 9V to >500V nn Adjustable Output Clamp Voltage nn C ontrols N-Channel MOSFET nn Adjustable Protection Timer nn Internal 9-Second C ool-Down Timer nn Shutdown IQ < 14µA n n 8-Lead TSOT and 3mm × 2mm DFN Packag es APPLICATIONS nn Industrial, Automoti ve and Avionic Surge Protection nn High Voltage DC Distribution nn 28V Vehicle Systems DESCRIPTION The LTC®4366 sur ge stopper protects loads from high vol tage transients. By controlling the gat e of an external N-channel MOSFET, the LTC4366 regulates the output during an overvoltage transient. The load may rem ain operational while the overvoltage i s dropped across the MOSFET. Placing a resistor in the return line isolates th e LTC4366 and allows it to float up wit h the supply; therefore, the upper limi t on the output voltage depends only on the availability of high valued resist ors and MOSFET ratings. An adjustable overvoltage timer prevents M.
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