LTC4249AV2-1#PBF

Overview

The LTC4249AV2-1#PBF is a high-voltage dual electronic circuit breaker from Analog Devices, designed for robust power management in demanding environments. Operating within a supply voltage range up to 65V, this component integrates two independent SPST switches with adjustable external control capabilities. It features accurate analog current monitoring outputs with 5% precision, facilitating precise load protection. The device supports current sharing between channels and includes distinct overcurrent thresholds: a filtered primary threshold of 50µs and a fast secondary threshold of 2µs. Packaged in a 20-LQFN (3x4) format, it ensures reliable performance across industrial temperature ranges.

Feature Summary

• Integrates two high-voltage SPST switches with adjustable external switch control
• Provides accurate analog current monitor outputs with 5% accuracy
• Features dual overcurrent protection thresholds including a fast 2µs response
• Supports parallel operation with allowed current sharing between channels

Applications

• High voltage bus protection systems
• Industrial equipment surge suppression circuits
• Telecommunications power distribution units
• Server backplane hot-swap interfaces

Procurement Notes

Verify the specific suffix AV2-1 against official Analog Devices documentation to ensure correct pinout and electrical characteristics. Confirm RoHS compliance status through the manufacturer's latest certification records. Check for any recent lifecycle changes or obsolescence notices directly from the supplier. Ensure the 20-LQFN package dimensions match your PCB footprint requirements precisely before ordering.

Selection Notes

Select this component when dual-channel high-voltage protection with precise analog feedback is required. The 5% current monitor accuracy suits applications needing detailed load data. Consider the 2µs fast threshold for sensitive loads requiring rapid fault isolation. Verify that the external switch capability aligns with your system's control logic and voltage levels.

Part Context

This part belongs to the LTC4249 series of specialized PMICs focused on power path management. It complements other Analog Devices solutions like the LTC4232 and ADM1273 by offering dual-channel protection rather than single-channel or integrated fuse alternatives. The series targets applications requiring granular control over high-voltage power distribution paths.

Replacement Considerations

LTC4249AV2-2#PBF serves as a variant within the same family, potentially differing in specific threshold configurations or marking codes. Direct substitution requires verification of electrical parameters and pin compatibility via official datasheets.