LT4363HDE-2#TR

Overview

The LT4363HDE-2#TR is a high voltage surge stopper controller manufactured by Analog Devices Inc. It operates within a wide input supply range of 4 VDC to 80 VDC and features an SMD/SMT termination type in a DFN-12 package. The device supports a maximum operating temperature of +125°C and a minimum of -55°C, with a quiescent current of 1.2 mA. Designed for board mount applications, it provides robust protection against overvoltage and reverse polarity events.

Feature Summary

• Controls external N-channel MOSFETs to protect loads from high voltage transients exceeding 100V.
• Provides fast overcurrent limiting to safe values, allowing connected loads to continue functioning during faults.
• Includes adjustable undervoltage/overvoltage comparators to monitor input supply conditions.

Applications

• Automotive systems requiring load dump protection
• Avionics power distribution networks
• Industrial equipment surge suppression

Procurement Notes

Verify the specific suffix TR indicates tape and reel packaging when sourcing. Confirm the H-grade designation aligns with the required extended temperature specifications (-55°C to +125°C). Ensure compatibility with the DFN-12 footprint and check for any recent product change notifications regarding pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this component for applications demanding high efficiency switching surge stopping with low quiescent current. The LT4363HDE-2#TR is suitable where bidirectional circuit breaker functionality and precise current monitoring are necessary. Consider the thermal performance of the DFN-12 package relative to the expected power dissipation in the external MOSFET under fault conditions.

Part Context

The LT4363 series serves as a high voltage surge stopper controller designed to protect sensitive electronics from severe voltage transients. This specific variant integrates current limit and retry logic, distinguishing it from basic surge suppressors. It is part of Analog Devices' portfolio for robust power management in harsh environments.

Replacement Considerations

LT4363HMS-2#PBF

FAQ

How does the LT4363HDE-2 handle persistent overvoltage conditions?

The LT4363-2 automatically retries after a cool-down delay if the overvoltage condition persists, provided the OV threshold is not exceeded beyond specific limits.

What is the reverse input protection capability?

The device can withstand reverse input voltages down to -60V, protecting the system from incorrect polarity connections.