LTC4380IMS-2#PBF

Overview

The LTC4380IMS-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 voltage range of 4 V to 72 V and features a fixed internal gate clamp voltage suitable for 12V systems. It draws a typical operating current of 8 µA, enabling use in always-on and battery-powered applications. The component provides overcurrent protection via an internal multiplier that limits operating time based on MOSFET stress. It supports reverse input protection using back-to-back MOSFETs and includes an undervoltage lockout function. The part is housed in a 10-pin MSOP package.

Feature Summary

• Clamps external N-channel MOSFET gate voltage to limit output during overvoltage events
• Provides overcurrent protection with adjustable fault timer based on MOSFET stress
• Supports reverse input protection through back-to-back MOSFET drive capability
• Features accurate undervoltage comparator and shutdown pin for low static current

Applications

• Automotive load dump protection
• Avionics power distribution
• Industrial surge suppression
• Battery-powered system high-side switching

Procurement Notes

Verify the specific suffix #PBF indicates tube packaging when sourcing. Confirm the IMS-2 designation matches the required 12V fixed clamp voltage for your system architecture. Ensure the MSOP-10 footprint aligns with your PCB layout constraints. Cross-reference the manufacturer datasheet for any recent product change notifications affecting pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when a fixed 12V clamp threshold is appropriate for the application's overvoltage requirements. Choose this part over adjustable versions if system design does not require custom clamp voltages up to 72V. Consider the 8 µA quiescent current for power-sensitive designs. Verify that the external MOSFET selection can handle the specified drain-source voltage and thermal stress limits defined in the datasheet.

Part Context

The LTC4380 series comprises low quiescent current surge stoppers designed for protecting sensitive electronics from transient voltage spikes. This specific model belongs to the IMS family, utilizing a surface-mount MSOP package for compact board integration. It serves as a robust alternative to traditional diode-based protection schemes by eliminating forward voltage drops and associated power dissipation in high-current paths.

Replacement Considerations

LTC4380IMS-4#PBF offers a different fixed clamp voltage option. LTC4380IDD-2#TRPBF provides the same electrical specifications but in a DFN-10 package with tape-and-reel packaging. Verify package compatibility and clamp voltage requirements when substituting.