LTC4380IDD-1#PBF

Surge Suppression ICS Overview

The LTC4380IDD-1#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 dump. The device operates within a wide input voltage range of 4 VDC to 72 VDC and features a fixed internal gate clamp voltage selectable for specific system requirements. It incorporates overcurrent protection with a fault timer that accelerates based on MOSFET stress. The component utilizes a 10-pin DFN package measuring 3 mm x 3 mm with a height of 0.75 mm.

Surge Suppression ICS Feature Summary

• Clamps external N-channel MOSFET gate voltage to limit output during overvoltage transients
• Provides overcurrent protection with a fault timer proportional to MOSFET stress
• Drives back-to-back MOSFETs for reverse input protection without Schottki diode voltage drop
• Features accurate undervoltage lockout comparator and shutdown control for minimal static current

Surge Suppression ICS Applications

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

Surge Suppression ICS Procurement Notes

Verify the specific suffix IDD-1 against official Analog Devices documentation to confirm the fixed gate clamp voltage configuration. Ensure the 10-pin DFN package dimensions match the target PCB footprint. Confirm RoHS compliance status through the manufacturer's latest datasheet or certification documents before finalizing procurement specifications.

Surge Suppression ICS Selection Notes

Select this component when designing circuits requiring protection against high-voltage transients in systems operating up to 72 VDC. The fixed gate clamp option simplifies design compared to adjustable versions. Consider the low quiescent current for battery-operated applications where minimizing standby power consumption is critical. Verify compatibility with the chosen external N-channel MOSFET for optimal thermal and electrical performance.

Surge Suppression ICS Part Context

The LTC4380 series comprises low quiescent current surge stoppers designed for robust transient protection. Variants within the family offer different gate clamp configurations, including fixed voltages for 12V and 24V/28V systems, as well as adjustable options for higher voltage ranges. The series supports various packaging formats to accommodate diverse board space constraints while maintaining consistent protective functionality.

Surge Suppression ICS FAQ

How does the LTC4380 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 duration of overcurrent protection?

An internal multiplier generates a TMR pin current proportional to VDS and ID, allowing the fault timer to accelerate based on MOSFET stress during overcurrent and overvoltage conditions.