SURGE STOPPERS

SURGE STOPPERS PROTECTION CIRCUIT BREAKER SUPPLY MOSFET LOAD 100V INPUT SURGE VIN VOUT VIN 20V/DIV 12V SURGE STOPPER ADJUSTABLE VOUT OUTPUT CLAMP 12V FAULT VOLTAGE TIMER 27V ADJUSTABLE CLAMP 100ms/DIV Compact, Precise Overvoltage and Overcurrent Protection Automotive, industrial, and aviation electronics need to survive and operate through power supply surges endemic to their environment. Traditional overvoltage (OV) and overcurrent (OC) protection relies on capacitors, transient voltage suppressors (TVS), fuses, diodes, and inductors, but these discrete solutions are bulky, inaccurate, and blow the fuse during a sustained fault. Our surge stopper family replaces these passive components with a controller and series protection MOSFET, enabling a compact and precise solution. X Shields Load Electronics from High Voltage Surges X Allows Uninterrupted System Operation through Surges X Protects Supply from Overload and Short-Circuit X Disconnects Load from Supply for Sustained Faults X Adjustable Clamp Voltage Eases Design Changes and Reuse X Tight Accuracy Minimizes Overdesign and Reduces Cost X Low Profile, Surface Mount Solution Enables Compact Form Factor X Automotive and Military-Plastic Temperature Grades Visit analog.com

2 Visit analog.com 3 Linear Surge Stoppers During normal operation, a linear surge stopper fully turns on the MOSFET to provide a low resistance path for the load current. When the input supply volt- age surges, the output is linearly regulated to a safe voltage set by a resistive divider, enabling ride-through operation. A capacitive fault timer protects the MOSFET by limiting the time spent in the high dissipation regulation state. VIN V 4V TO 80V OUT Surge Stopper with Circuit Breaker X Resistor-Adjustable 2% Accurate Clamp Voltage X Input Surge: Linear Regulator for Adjustable Time VCC FB X −60V Reverse Input Protection LT4363 X Foldback Current-Limited Circuit Breaker with Adjustable Delay X Fault Timer Accelerated by MOSFET Voltage Drop TIMER VIN V 4V TO 80V OUT i Surge Stopper with Ideal Diode SHDN FB X LT4363 Functions Plus Ideal Diode Control UV LTC4364 X Ideal Diode for Output Holdup and Reverse Protection ENABLE X Resistor-Adjustable 2.4% Accurate Clamp Voltage OV FAULT X −40V Reverse-Input, −20V Reverse-Output Protection TIMER VIN V 4V TO 72V OUT 8µA Quiescent Current Surge Stopper X Low 8µA Operating IQ, 6µA in Shutdown VCC X Pin-Selectable Gate Clamp for 12V and 24V/28V Systems LTC4380 FAULT X Input Surge: Clamps MOSFET Gate for Adjustable Time CLAMP X −60V Reverse Input Protection SELECT TIMER X Current-Limited Circuit Breaker with Adjustable Delay X Fault Timer Accelerated by MOSFET Power VIN V 9V TO >500V OUT Floating Surge Stopper X Rugged Floating Topology for >500V Operation LTC4366 FB X Resistor-Adjustable 3% Accurate Clamp Voltage TIMER X Input Surge: Linear Regulator for Adjustable Time VSS

Visit analog.com 3 Switching Surge Stopper During normal operation, a switching surge stopper turns on an external MOSFET continuously to pass the input voltage through to the output with minimum conduction loss. When an input voltage surge occurs, it starts switching the external MOSFET to operate as a high efficiency switching DC/DC regulator to protect critical downstream components by limiting the output voltage and current. High Efficiency Switching Surge Stopper X High Efficiency for High Power (>5A) Surges X Normal Operation: 100% Duty Cycle with MOSFET On X Input Surge: Switching Regulator with Adjustable Timer X Resistor Adjustable 1.1% Accurate Clamp Voltage X Adjustable Current Limit X Inherent LC Filter Improves Input EMI Protection Controllers Protection controllers disconnect immediately during overvoltage and provide a compact solution for power entry protection in battery-powered portable equipment. VIN 2.5V TO 60V VOUT Undervoltage (UV), Overvoltage (OV), Overcurrent (OC), and Reverse Input (RI) Protection Controllers SHDN X Block Voltages Outside UV-OV Window X −40V Reverse Input Protection UV LTC4368 FAULT X Adjustable 1.5% Accurate UV, OV Thresholds X Low Quiescent and Shutdown Currents OV RETRY X Compact Solution Footprint Forward Reverse Device VIN UV OV RI OC Current Trip Current Trip LTC4365 2.5V to 34V • • • +70V OV = 36V UV = 7V LTC4367 2.5V to 60V • • • 20V/DIV VIN LTC4368 2.5V to 60V • • • • 50mV −50mV/−3mV VALID WINDOW GND VOUT VOUT –40V 20V/DIV VIN 200ms/DIV Overvoltage and Overcurrent Protection Controllers X 2.5V to 5.5V Operation X Fixed 5.8V ±2% Overvoltage Turn-Off Threshold X <1µs Fast Overvoltage Turn-Off X Reverse Input Protection FET Driver Output X Compact Solution Footprint Device VIN(MAX) OV OC MOSFET LTC4360 80V • External N-Ch LTC4361 80V • • External N-Ch LTC4362 28V • • Internal 1.5A

Solutions for Automotive and Military Surge Standards Analog Devices provides evaluation boards demonstrating surge stopper circuits for automotive and military surge standards such as ISO-7637-2 and MIL- STD-1275D. Each board has been tested by an independent lab with the complete test report available online. DC2062 for 12V, 3.8A ISO-7637-2 Application X Features LT4363 Surge Stopper X Rides through 100V, 500ms Load Dump Pulse X Latchoff and Auto-Retry Options Parameter Min Typ Max Units Input Supply Operating Range 5 12 23.5 V Input Supply 500ms Surge 100 V Output Regulation Voltage 23.5 25 25.4 V Current Limit 3 3.8 4.6 A DC2150 for 28V, 5A MIL-STD-1275D Application X Features LTC4366 and LT4363 Surge Stoppers X Rides through 100V, 500ms Surge X Four Assembly Options, Full-Featured Option Available Parameter Min Typ Max Units Input Supply Operating Range 8 28 40 V Input Supply 500ms Surge 100 V Output Regulation Voltage 41 43.6 46 V Current Limit 4.4 5 5.6 A Overvoltage Protection Selection Guide OVP Reverse OVP Fault Blocks Temp Demo Device Type* OCP Operating VIN Stops VIN Input IQ (µA) ISHDN (µA) MOSFET Accuracy Timer IREV Grades Board Package (mm x mm) Surge Stoppers LT4356 1 •† 4V to 80V >100V −60V 1210 7 N-Ch 2% • C, I, H, MP DC1018 4x3 DFN-12, MSOP-10, SO-16 LT4363 1 • 4V to 80V >100V −60V 970 7 N-Ch 2% • C, I, H, MP DC1935 4x3 DFN-12, MSOP-12, SO-16 LTC4364 1 • 4V to 80V >100V −40V 483 10 N-Ch 2.4% • • C, I, H DC2027 4x3 DFN-14, MSOP-16, SO-16 LTC4366 1 9V to >500V >500V External 159 5 N-Ch 3% • C, I, H, MP DC1850 3x2 DFN-8, TSOT-8 LTC4380 2 • 4V to 72V >100V −60V 8 6 N-Ch ~10% • C, I, H DC2178 3x3 DFN-10, MSOP-10 LTC7860 3 • 3.5V to 60V >100V External 770 7 P-Ch 1.1% • E, I, H, MP DC2239 MSOPE-12 Protection Controllers LTC4365 4 2.5V to 34V >100V −40V 125 10 N-Ch 1.5% C, I, H DC1555 3x2 DFN-8, TSOT-8 LTC4367 4 2.5V to 60V >100V −40V 70 5 N-Ch 1.5% C, I, H DC2417 3x3 DFN-8, MSOP-8 LTC4368 4 • 2.5V to 60V >100V −40V 80 5 N-Ch 1.5% • C, I, H DC2418 3x3 DFN-10, MSOP-10 LTC4360 4 2.5V to 5.5V 80V External 230 1.5 N-Ch 2% C, I DC1505 SC70-8 LTC4361 4 • 2.5V to 5.5V 80V External 230 1.5 N-Ch 2% C, I, H DC1506 2x2 DFN-8, TSOT-8 LTC4362 4 • 2.5V to 5.5V 28V External 220 1.5 1.5A 2% C, I DC1575 2x3 DFN-8 OCP = Overcurrent Protection, * Overvoltage Protection Type: 1 = Linear regulation of output; 2 = Clamps MOSFET gate voltage; 3 = Switching regulation of output; 4 = Disconnects output from input; † Overcurrent protection only below 100V Analog Devices, Inc. Analog Devices, Inc. Analog Devices, Inc. Analog Devices, Inc. ©2017–2018 Analog Devices, Inc. All rights reserved. Worldwide Headquarters Europe Headquarters Japan Headquarters Asia Pacific Headquarters Trademarks and registered trademarks are the property of their respective owners. Analog Devices, Inc. Analog Devices GmbH Analog Devices, KK Analog Devices Ahead of What’s Possible is a trademark of Analog Devices. One Technology Way Otl-Aicher-Str. 60-64 New Pier Takeshiba 5F, Sandhill Plaza PHsurgestoppers-9/18(B) P.O. Box 9106 80807 München South Tower Building 2290 Zuchongzhi Road Norwood, MA 02062-9106 Germany 1-16-1 Kaigan, Minato-ku, Zhangjiang Hi-Tech Park analog.com U.S.A. Tel: 49.89.76903.0 Tokyo, 105-6891 Pudong New District Tel: 781.329.4700 Fax: 49.89.76903.157 Japan Shanghai, China 201203 (800.262.5643, U.S.A. only) Tel: 813.5402.8200 Tel: 86.21.2320.8000 Fax: 781.461.3113 Fax: 813.5402.1064 Fax: 86.21.2320.8222