The LTC4380HDD-4#TRPBF 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.
Feature
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
Applications
Automotive/Avionic/Industrial Surge Protection
Hot Swap, Live Insertion
High Side Switch for Battery Powered Systems
Automotive Load Dump Protection
Catalogue
FPGA / CPLD
Memory
MOS 
MCU 
DSP
OCEP
Secondary 
Other 
