LTC4380HMS-3#TRPBF

Overview

The LTC4380HMS-3#TRPBF 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 features a fixed gate clamp voltage suitable for 24V and 28V systems, with an operating voltage range of 4 VDC to 72 VDC. It operates with a low quiescent current of 12 uA, making it suitable for always-on applications. The component is housed in a 10-lead MSOP package and supports surface mount technology.

Feature Summary

• Provides overvoltage protection by clamping the gate voltage of an external N-channel MOSFET during transient events such as automotive load dump.
• Includes internal overcurrent protection using a multiplier that generates a current proportional to V_DS and I_D to limit stress time.
• Features an accurate undervoltage lockout comparator on the ON pin to monitor input supply conditions.

Applications

• Automotive electronics requiring robust load dump protection
• Avionics power distribution systems
• Industrial equipment needing reliable surge suppression

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing components. Confirm the -3 variant corresponds to the fixed 24V/28V system clamp voltage rather than adjustable options. Ensure compatibility with the required MSOP-10 footprint and check for any recent product change notifications regarding manufacturing updates or material composition changes before finalizing procurement orders.

Selection Notes

Select this component for designs requiring low standby current in battery-powered or always-on circuits. The fixed clamp voltage simplifies design for standard 24V and 28V automotive architectures compared to adjustable versions. Consider the thermal performance of the MSOP-10 package and ensure the external MOSFET selection aligns with the internal current limiting characteristics defined by the TMR pin functionality.

Part Context

This part belongs to the LTC4380 series of board mount surge protectors designed for high-voltage transient suppression. It serves as a specialized power management IC within Analog Devices' portfolio, focusing on protecting downstream loads from damaging voltage spikes without the power loss associated with traditional Schottky diode solutions.

Replacement Considerations

LTC4380IMS-3#TRPBF offers identical electrical specifications but utilizes an MSOP-10 package instead of the DFN-10 package found in other variants like the LTC4380HDD-3#TRPBF. Verify package dimensions and thermal dissipation requirements when substituting between these form factors.