LTC4380CMS-2#PBF

Surge Suppression ICS Overview

The LTC4380CMS-2#PBF is a low quiescent current surge stopper manufactured by Analog Devices Inc. It protects loads from high voltage transients by clamping the gate voltage of an external N-channel MOSFET. The device operates within a wide input voltage range of 4 V to 72 V and features a fixed internal gate clamp voltage selectable for 12V or 24V/28V systems. It provides overcurrent protection with adjustable fault timers and reverse input protection up to -60 V. The component draws only 8 µA during operation and 6 µA when disabled, making it suitable for battery-powered applications. It is housed in a 10-pin MSOP package.

Surge Suppression ICS Feature Summary

• Clamps external N-channel MOSFET gate voltage to limit output during overvoltage events such as automotive load dump
• Generates internal multiplier current proportional to VDS and ID to limit operating time under stress conditions
• Drives back-to-back MOSFETs for reverse input protection without Schottky diode voltage drop
• Includes accurate ON pin comparator for undervoltage monitoring and shutdown control

Surge Suppression ICS Applications

• Automotive, avionics, and industrial surge protection
• Hot-swap and hot-insertion power supply circuits
• High-side switching for battery-powered systems
• Intrinsically safe applications requiring low standby current

Surge Suppression ICS Procurement Notes

Verify the specific suffix #PBF indicates tube packaging and confirm the CMS-2 designation corresponds to the commercial temperature grade and fixed clamp voltage variant. Ensure compatibility with the required external N-channel MOSFET ratings. Check for AEC-Q100 qualification if automotive compliance is mandatory. Confirm availability status as distribution channels may report limited stock for this specific package configuration.

Surge Suppression ICS Selection Notes

Select this part when a fixed gate clamp voltage for 12V or 24V/28V systems is required rather than an adjustable version. Choose the MSOP-10 package for through-hole or standard surface mount assembly needs. Consider the 8 µA quiescent current for always-on designs. Verify that the external MOSFET can withstand the maximum surge voltages handled by the limiter circuitry.

Surge Suppression ICS Part Context

This component belongs to the LTC4380 family of low quiescent current surge stoppers designed for protecting sensitive electronics from transient overvoltages. The series offers various packages including DFN and MSOP, and options for fixed or adjustable gate clamp voltages. The CMS-2 variant specifically targets commercial temperature ranges with fixed clamp settings.

Surge Suppression ICS Replacement Considerations

LTC4380IMS-2#WPBF

Surge Suppression ICS FAQ

How does the LTC4380CMS-2#PBF handle reverse polarity?

The GATE pin can drive back-to-back MOSFETs to provide reverse input protection up to -60 V, eliminating the need for external Schottky diodes.

What determines the operating time during overcurrent events?

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