LTC4380HMS-3#WTRPBF

Overview

The LTC4380HMS-3#WTRPBF is a low quiescent current surge stopper designed to protect loads from high voltage transients. It operates within a wide input voltage range of 4V to 72V and features an ultra-low operating current of 8µA. The device utilizes an external N-channel MOSFET for overvoltage protection, clamping the gate voltage to limit output during events such as automotive load dump. It includes adjustable gate clamp functionality and integrated overcurrent protection via an internal multiplier that monitors VDS and ID to limit stress time.

Feature Summary

• Provides overvoltage protection by clamping the gate voltage of an external N-channel MOSFET to safe levels during transient events
• Integrates overcurrent protection using an internal multiplier to generate TMR pin current proportional to VDS and ID
• Enables reverse input protection by driving back-to-back MOSFETs, eliminating Schottky diode voltage drop and dissipation

Applications

• Automotive systems requiring AEC-Q100 qualification
• Avionics power distribution networks
• Industrial equipment power inputs

Procurement Notes

Verify the specific suffix WTRPBF against the manufacturer's official ordering guide to confirm the MSOP-10 package and tape-and-reel quantity. Confirm AEC-Q100 automotive grade status and RoHS compliance details directly with Analog Devices documentation prior to procurement.

Selection Notes

Select this component when designing circuits requiring low standby current for always-on or battery-powered applications. Choose the adjustable clamp version for system voltages exceeding standard 12V or 24V/28V fixed options. Ensure the external MOSFET selection aligns with the device's voltage and current stress limitations defined in the datasheet.

Part Context

This part belongs to the LTC4380 series of board mount surge protectors. It is functionally similar to other variants like the LTC4380HDD-3#TRPBF but differs in package type, utilizing a 10-MSOP form factor instead of DFN-10. All variants share the core low quiescent current architecture and external MOSFET control mechanism.

Replacement Considerations

Direct substitutes include other LTC4380 variants with different packages such as LTC4380HDD-3#TRPBF or LTC4380HMS-4#WPBF, provided the package footprint and electrical parameters match the design requirements.