LTC4380CMS-1#TRPBF

Surge Suppression ICS Overview

The LTC4380CMS-1#TRPBF is a low quiescent current surge stopper manufactured by Analog Devices Inc. It protects loads from transient high-voltage damage by clamping the gate voltage of an external N-channel MOSFET. The device features a fixed internal gate clamp voltage suitable for 12V and 24V/28V systems, with a wide operating voltage range of 4 VDC to 72 VDC. It provides overcurrent protection via an internal multiplier that generates a timer current proportional to VDS and ID, limiting stress on the MOSFET during fault conditions. The part operates in a temperature range of -40°C to +85°C.

Surge Suppression ICS Feature Summary

• Clamps external N-channel MOSFET gate voltage to limit output voltage during overvoltage events such as automotive load dump.
• Provides overcurrent protection using an internal multiplier to generate a timer current proportional to MOSFET drain-source voltage and current.
• Features a GATE pin capable of driving back-to-back MOSFETs to eliminate voltage drop and power dissipation associated with Schottky diode solutions.
• Includes an accurate ON pin comparator to monitor input supply for undervoltage conditions or function as a shutdown input.

Surge Suppression ICS Applications

• Automotive, avionics, and industrial surge protection
• Hot-swap and hot-insertion applications
• High-side switching for battery-powered systems
• Intrinsically safe applications

Surge Suppression ICS Procurement Notes

Verify the specific suffix 'CMS' indicates the MSOP-10 package variant when sourcing this component. Confirm the '-1' designation corresponds to the fixed gate clamp voltage configuration intended for standard 12V and 24V/28V system architectures. Ensure compatibility with the required external N-channel MOSFET specifications for the target voltage and current ratings.

Surge Suppression ICS Selection Notes

Select this model for applications requiring low static current operation, specifically the 8 µA active current and 6 µA shutdown current, which supports always-on and battery-powered designs. Choose the fixed clamp version for standard vehicle architectures rather than the adjustable variant used for higher voltage systems up to 72 VDC. Consider the MSOP-10 package dimensions for PCB layout constraints.

Surge Suppression ICS Part Context

This component belongs to the LTC4380 family of low quiescent current surge stoppers designed to protect sensitive electronics from high-voltage transients. The family includes variants with fixed or adjustable gate clamp voltages and different packaging options such as DFN-10 and MSOP-10. These devices are engineered to replace traditional protection schemes by actively controlling external MOSFETs to manage both overvoltage and overcurrent stress.

Surge Suppression ICS Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify if other members of the LTC4380 family, such as the IDD or IMS series, meet the specific package and clamp voltage requirements of the design.