LTC4380HDD-4#PBF

Surge Suppression ICS Overview

The LTC4380HDD-4#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, limiting output voltage during overvoltage events such as automotive load dumps. The device operates within a voltage range of 4V to 72V and features a fixed 50V internal gate clamp. It includes adjustable fault timers for overcurrent and overvoltage protection based on MOSFET stress. The component is housed in a 10-WFDFN (3mm x 3mm) package with exposed pad.

Surge Suppression ICS Feature Summary

• Provides overvoltage protection by clamping external N-channel MOSFET gate voltage during transient events
• Features adjustable fault timers that limit operating time based on MOSFET stress conditions
• Supports reverse input protection up to -60V through back-to-back MOSFET drive capability

Surge Suppression ICS Applications

• Automotive and avionics surge protection
• Industrial system load dump protection
• Hot-swap and hot-insertion applications

Surge Suppression ICS Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and standard tube packaging. Confirm the DD suffix corresponds to the DFN-10 package variant. Ensure compatibility with external MOSFET selection for the 50V clamp setting. Check for any recent Product Change Notifications regarding pinout or material updates before finalizing procurement.

Surge Suppression ICS Selection Notes

Select this part when a fixed 50V gate clamp is required for systems operating between 4V and 72V. Choose the DD suffix for the 10-pin DFN package suitable for space-constrained designs. Consider the HMS variant if automotive qualification or higher temperature operation is needed. Ensure the external MOSFET can handle the specified surge currents and thermal stress defined by the internal timer.

Surge Suppression ICS Part Context

This component belongs to the LTC4380 family of low quiescent current surge stoppers designed for protecting sensitive electronics from high-voltage transients. The family offers various clamp voltages and packages to suit different system requirements. The IDD and IMS variants provide alternative package options, while the H-series parts offer extended temperature ranges and automotive qualification.

Surge Suppression ICS Replacement Considerations

LTC4380HDD-3#PBF provides similar functionality but with a 31.5V fixed gate clamp instead of 50V.