High Voltage Surge Stopper Features: Rugged Floating Topology Wide Operating Voltage Range: 9V to >500V Adjustable Output Clamp Voltage Controls N-Channel MOSFET Adjustable Protection Timer Internal 9 Second Cool-Down Timer Shutdown IQ < 14μA Available in 8-Lead TSOT and 8-Lead 3mm × 2mm DFN Packages

High Voltage Surge Stopper Features: Rugged Floating Topology Wide Operating Voltage Range: 9V to >500V Adjustable Output Clamp Voltage Controls N-Channel MOSFET Adjustable Protection Timer Internal 9 Second Cool-Down Timer Shutdown IQ < 14μA Available in 8-Lead TSOT and 8-Lead 3mm × 2mm DFN Packages

100V Overvoltage, Undervoltage and Reverse Supply Protection Controller Features:Wide Operating Voltage Range: 2.5V to 60VOvervoltage Protection to 100VReverse Supply Protection to –40VLTC4367: Blocks 50Hz and 60Hz AC PowerLTC4367: 32ms Recovery from FaultLTC4367-1: Fast 500μs Recovery from FaultNo Input Capacitor or TVS Required for Most ApplicationsAdjustable Undervoltage and Overvoltage ThresholdsControls Back-to-Back N-Channel MOSFETsLow Operating Current: 70μALow Shutdown Current: 5μA8-Pin MSOP and 3mm × 3mm DFN PackagesAEC-Q100 Qualified for Automotive Applications

100V Overvoltage, Undervoltage and Reverse Supply Protection Controller Features:Wide Operating Voltage Range: 2.5V to 60VOvervoltage Protection to 100VReverse Supply Protection to –40VLTC4367: Blocks 50Hz and 60Hz AC PowerLTC4367: 32ms Recovery from FaultLTC4367-1: Fast 500μs Recovery from FaultNo Input Capacitor or TVS Required for Most ApplicationsAdjustable Undervoltage and Overvoltage ThresholdsControls Back-to-Back N-Channel MOSFETsLow Operating Current: 70μALow Shutdown Current: 5μA8-Pin MSOP and 3mm × 3mm DFN PackagesAEC-Q100 Qualified for Automotive Applications

Low Quiescent Current Surge Stopper Features: Low Quiescent Current: 8µA Operating Withstands Surge Voltage Up to the MOSFET Limit Wide Operating Voltage Range: 4V to 72V Overcurrent Protection Selectable Internal 31.5V/50V or Adjustable Gate Clamp Voltage Reverse Input Protection to –60V Adjustable Turn-On Threshold Adjustable Fault Timer with MOSFET Stress Acceleration Controls N-Channel MOSFET Latchoff and Retry Options Low Retry Duty Cycle During Faults 10-Pin DFN (3mm × 3mm) and MSOP Packages AEC-Q100 Qualified for Automotive Applications

High Efficiency Switching Surge Stopper Features:High Efficiency VOUT Clamp Stops High Voltage Input SurgesSWITCH-ON Mode 100% Duty Cycle for Normal OperationPROTECTIVE PWM Mode for Transients and FaultsVIN Pin to SGND Range: 3.5V to 60VExternal Input Voltage is Extendable to 200V+Adjustable Output Voltage ClampAdjustable Output Overcurrent ProtectionPower Inductor Improves Input EMI in Normal OperationProgrammable Fault TimerAdjustable Soft-Start for Input Inrush Current Limiting4.5% Retry Duty Cycle During FaultsAdjustable Switching Frequency: 50kHz to 850kHzOptional Reverse Input Voltage ProtectionAvailable in Thermally Enhanced 12-lead MSOP Package

140V High Efficiency Switching Surge Stopper Features: VOUT Clamp Stops High Voltage Input Surges 100% Duty Cycle Pass-Through Mode During Normal Operation Switches During Overvoltage or Overcurrent Transients and Faults and During Startup High Efficiency Switching Enables Long Duration Surge Protection and High Output Currents Wide VIN Range: 4V to 140V (150V Abs Max) Adjustable Output Voltage Clamp Up to 60V Adjustable Output Overcurrent Protection RSENSE or Inductor DCR Current Sensing Power Inductor Reduces Input EMI in Normal Mode Adjustable Soft-Start for Inrush Current Limiting Programmable Fault Timer Open-Drain Fault Warning Indicator 2.7% Retry Duty Cycle During Faults Adjustable Switching Frequency: 50kHz to to 900kHz Adjustable Input Voltage Turn-On Threshold Adjustable Input Overvoltage Lockout Threshold 20-Pin 4mm × 5mm QFN and TSSOP Packages

Surge Suppressors 485 SRGE PRO W/TB RS-485 High Energy

SPD, 120KA, BASIC PKG., NEMA 4X

The LTC4380 low quiescent current surge stopper protects loads from high voltage transients. Overvoltage protection is provided by clamping the gate voltage of an external N-channel MOSFET to limit the output voltage to a safe value during overvoltage events such as load dump in automobiles. Fixed gate clamp voltages are selectable for 12V and 24V/28V systems. For systems of any voltage up to 72V, use the adjustable gate clamp versions. Overcurrent protection is also provided.An internal multiplier generates a TMR pin current proportional to VDS and ID, so that operating time in both overcurrent and overvoltage conditions is limited in accordance with MOSFET stress.The GATE pin can drive back-to-back MOSFETs for reverse input protection, eliminating the voltage drop and dissipation of a Schottky diode solution. A low 8µA operating current permits use in always-on and battery powered applications. An accurate ON pin comparator monitors the input supply for undervoltage (UV) conditions and also serves as a shutdown input, reducing the quiescent current to 6µA.Applications Automotive/Avionic/Industrial Surge Protection Hot Swap, Live Insertion High Side Switch for Battery Powered Systems Automotive Load Dump Protection