LTC4380 Datasheet | Analog Devices

LTC4380 Low Quiescent Current Surge Stopper Features nn Low Quiescent Current: 8µA Operating nn Withstands Surge Voltage Up to the MOSFET Limit nn Wide Operating Voltage Range: 4V to 72V nn Overcurrent Protection nn Selectable Internal 31.5V/50V or Adjustable Gate Clamp Voltage nn Reverse Input Protection to - 60V nn Adjustable Turn-On Threshold nn Adjustable Fault Timer with MOSFET Stress Acceleration nn Controls N-Channel MOSFET nn Latchoff and Retry Options nn Low Retry Duty Cycle During Faults nn 10-Pin DFN (3mm × 3mm) and MSOP Packages nn AEC-Q100 Qualified for Automotive Applications APPLICATIONS nn Automotive/Avionic/Industrial Surge Protection nn Hot Swap, Live Insertion nn High Side Switch for Battery Powered Systems nn Automotive Load Dump Protection DESCRIPTION The LTC®4380 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 parator monitors the input supply for undervoltage (UV) conditions and also serves as a shutdown input, reducing the quiescent current to 6µA. All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. patents, including...