Surge Stoppers 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. RSNS VIN 4V TO 80V GATE VCC SNS VOUT VIN 100V/DIV OUT LT4363 250V INPUT SURGE ADJUSTABLE CLAMP FB 28V 43V CLAMP VOUT 20V/DIV TIMER 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. VIN 9V TO >500V VOUT + RUGGED FLOATING TOPOLOGY 800V INPUT SURGE VIN 200V/DIV REF 160V ADJUSTABLE CLAMP – LTC4366 200V CLAMP VOUT 100V/DIV 160V RBIAS 20ms/DIV Part Number Operating Range VIN Max Reverse Overcurrent Protection Protection 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 Comments 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. Package Options 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. Reverse Input Protection to –40V >80V Surge Protection Ideal Diode for Output Hold-Up and Reverse Protection Overcurrent Protection Output Port Protection to –20V VIN 4V to 80V VOUT 10µA Shutdown Current SHDN UV FB LTC4364 Adjustable Output Clamp ENABLE OV FAULT TIMER LTC4365 UV, OV and Reverse Supply Protection Controller VIN OPERATING RANGE: 2.5V TO 34V PROTECTS 60V TO –40V VOUT 30V UV = 3.5V OV = 18V VIN VOUT VOUT GATE NO TVS REQUIRED VIN VOUT LTC4365 ADJUSTABLE 0V/UV THRESHOLDS SHDN UV OV FAULT GND Valid Window GND 10V/DIV –30V VIN 1s/DIV Features n n n n n Low Operating Current: 125μA Low Shutdown Current: 10μA Blocks 50Hz and 60Hz AC Power –40°C to 125°C Operation 8-Lead, 3mm × 2mm DFN and TSOT-23 Packages www.linear.com/surgestoppers n 1-800-4-LINEAR 0712A