LTC4380IDD-2#PBF

Surge Suppression ICS Overview

The LTC4380IDD-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, limiting output voltage during overvoltage events such as automotive load dump. The device features a fixed internal gate clamp voltage selectable for 12V and 24V/28V systems. It operates within a wide input voltage range of 4 VDC to 72 VDC and draws a typical operating current of 12 µA. The component is housed in a 10-lead DFN package measuring 3 mm x 3 mm with a height of 0.75 mm. It supports operation temperatures from -40°C to +85°C.

Surge Suppression ICS Feature Summary

• Provides overvoltage protection by clamping the gate voltage of an external N-channel MOSFET to limit output voltage during transient events.
• Features a fixed internal gate clamp voltage optimized for standard 12V and 24V/28V system architectures.
• Includes overcurrent protection functionality utilizing an internal multiplier to generate a timer current proportional to MOSFET stress.
• Enables reverse input protection up to -60V by driving back-to-back MOSFETs, eliminating Schottky diode voltage drops.

Surge Suppression ICS Applications

• Automotive and avionics load dump protection
• Industrial board mount surge suppression
• Hot-swap and hot-insertion circuitry
• High-voltage side switching for battery-powered systems

Surge Suppression ICS Procurement Notes

Verify the specific suffix #PBF indicates tube packaging when reviewing distributor listings, as other variants may use tape and reel. Confirm the IDD designation corresponds to the industrial temperature grade (-40°C to +85°C) required for your application environment. Ensure the fixed gate clamp version matches your system's nominal voltage level (12V or 24V/28V), as adjustable versions exist for higher voltages. Cross-reference the datasheet revision date to ensure compatibility with your design specifications.

Surge Suppression ICS Selection Notes

Select this part when a fixed gate clamp voltage is sufficient for 12V or 24V/28V systems, avoiding the complexity of external resistor networks required for adjustable versions. The low 12 µA operating current makes it suitable for always-on applications where power conservation is critical. Choose the DFN-10 package for compact PCB layouts requiring surface-mount installation. Ensure the external N-channel MOSFET selected can withstand the maximum surge voltage limits defined in the datasheet without exceeding its breakdown ratings.

Surge Suppression ICS Part Context

The LTC4380 series comprises low quiescent current surge stoppers designed for protecting sensitive electronics from high voltage transients. This specific model belongs to the IDD variant family, which offers a fixed gate clamp voltage configuration. It serves as a robust alternative to traditional diode-based protection schemes, offering lower power dissipation and better efficiency in high-voltage DC distribution networks across automotive, industrial, and avionics sectors.

Surge Suppression ICS Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should evaluate functional equivalents based on voltage rating, current handling, and package dimensions if direct substitution is required.