LTC4380 Low Quiescent Current Surge Stopper FEATURESDESCRIPTION n Low Quiescent Current: 8µA Operating The LTC®4380 low quiescent current surge stopper protects n Withstands Surge Voltage Up to the MOSFET Limit loads from high voltage transients. Overvoltage protection n Wide Operating Voltage Range: 4V to 72V is provided by clamping the gate voltage of an external n Overcurrent Protection N-channel MOSFET to limit the output voltage to a safe n Selectable Internal 31.5V/50V or Adjustable Gate value during overvoltage events such as load dump in Clamp Voltage automobiles. Fixed gate clamp voltages are selectable for n Reverse Input Protection to –60V 12V and 24V/28V systems. For systems of any voltage up n Adjustable Turn-On Threshold to 72V, use the adjustable gate clamp versions. Overcur- n Adjustable Fault Timer with MOSFET Stress rent protection is also provided. Acceleration An internal multiplier generates a TMR pin current pro- n Controls N-Channel MOSFET portional to VDS and ID, so that operating time in both n Latchoff and Retry Options overcurrent and overvoltage conditions is limited in ac- n Low Retry Duty Cycle During Faults cordance with MOSFET stress. n 10-Pin DFN (3mm × 3mm) and MSOP Packages n AEC-Q100 Qualified for Automotive Applications The GATE pin can drive back-to-back MOSFETs for reverse input protection, eliminating the voltage drop and dissi- pation of a Schottky diode solution. A low 8µA operating APPLICATIONS current permits use in always-on and battery powered n Automotive/Avionic/Industrial Surge Protection applications. An accurate ON pin comparator monitors n Hot Swap, Live Insertion the input supply for undervoltage (UV) conditions and n High Side Switch for Battery Powered Systems also serves as a shutdown input, reducing the quiescent n Automotive Load Dump Protection current to 6µA. All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. patents, including 9634481. TYPICAL APPLICATION12V, 1A with 250V Overvoltage ProtectionSurge Stopper Limits Output to 27V During Input Surge FDB33N25 20mΩ 12V/1A VIN C OUTPUT CLAMPED TMR = 8.2µF 12V 100V INPUT SURGE I AT 27V LOAD = 1A (250VPK) 22µF 10Ω 33Ω 249k 10k 47nF V DRN GATE SNS OUT IN 20V/DIV 12V VCC LTC4380-2 FLT V 0.1µF OUT ON 20V/DIV 12V GND TMR SEL 27V ADJUSTABLE CLAMP 68V 8.2µF CMHZ5266B 100ms/DIV 4380 TA01b 4380 TA01a Rev. C Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts
