Quiescent current surge stopper

The LTC4380, an ultralow quiescent current (IQ) surge stopper, provides compact overvoltage and overcurrent protection for always-on 4V to 72V electronics in automotive, industrial and avionic systems.

By Linear Technology April 28, 2016

The LTC4380, an ultralow quiescent current (IQ) surge stopper, provides compact overvoltage and overcurrent protection for always-on 4V to 72V electronics in automotive, industrial and avionic systems. The LTC4380 protects downstream electronics from input overvoltage up to the MOSFET rating, while also protecting the power supply from output overload. During an input voltage surge, such as automotive load dump, the LTC4380 drops the excess voltage across the external MOSFET while clamping its gate and therefore the output to a safe voltage. This enables the use of lower voltage rated electronics downstream, saving costs. During an output overload or short-circuit, the LTC4380 regulates the forward path to a current limit set by a sense resistor.

Linear Technology

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