LTC4380IMS-2#TRPBF

Overview

The LTC4380IMS-2#TRPBF is a low quiescent current surge stopper manufactured by Analog Devices Inc. It operates within a voltage range of 4 V to 72 V and features an SMD/SMT mounting style in an MSOP-10 package. The device draws a typical operating current of 8 µA, with a maximum operating temperature of +85°C and a minimum of -40°C. Designed for board mount applications, it provides robust protection against high voltage transients.

Feature Summary

• Clamps external N-channel MOSFET gate voltage to limit output during overvoltage events like automotive load dump
• Drives back-to-back MOSFETs for reverse input protection without Schottky diode voltage drop
• Generates TMR pin current proportional to VDS and ID to limit operating time under stress conditions

Applications

• Automotive, avionics, and industrial surge protection
• Battery-powered systems requiring always-on functionality
• High-voltage side switching for battery-supplied equipment

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing components. Confirm that the IMS-2 designation corresponds to the fixed internal clamp voltage suitable for your system requirements. Ensure the MSOP-10 footprint matches your PCB layout constraints before finalizing procurement orders.

Selection Notes

Select this component for applications requiring ultra-low static current consumption in always-on environments. The fixed clamp version is appropriate for standard 12V or 24V/28V systems where adjustable thresholds are unnecessary. Consider the MSOP-10 package size if space efficiency is critical compared to larger DFN options.

Part Context

This part belongs to the LTC4380 series of low quiescent current surge stoppers designed to protect loads from transient high voltages. Unlike general-purpose switches, these devices specifically manage MOSFET stress during fault conditions. The series supports both fixed and adjustable clamp configurations to accommodate various system voltage levels up to 72V.

Replacement Considerations

LTC4380IMS-2#PBF (Tube Packaging)

FAQ

How does the device handle reverse input protection?

The GATE pin can drive back-to-back MOSFETs to provide reverse input protection, eliminating the voltage drop and power dissipation associated with Schottky diode solutions.

What determines the operating time during overcurrent or overvoltage?

An internal multiplier generates a TMR pin current proportional to VDS and ID, limiting operating time in accordance with MOSFET stress limits.