LTC4266CIUHF#TRPBF

Overview

The LTC4266CIUHF#TRPBF is a quad Power Sourcing Equipment (PSE) controller designed for IEEE 802.3at PoE+ applications. It supports four independent ports with integrated high-side switches and current sensing. The device operates within an input voltage range of 37V to 57V and provides precise classification and detection capabilities compliant with the standard. It features thermal shutdown, overcurrent protection, and status reporting via I2C interface.

Feature Summary

• Integrates four independent PSE channels with built-in power switches
• Supports IEEE 802.3at PoE+ classification and detection protocols
• Includes I2C interface for configuration and status monitoring
• Provides comprehensive protection against overcurrent and thermal events

Applications

• High-density PoE+ midspan injectors
• Network switch power sourcing equipment modules
• Industrial IoT gateway power distribution units
• PoE++ ready infrastructure upgrades

Procurement Notes

Verify the specific suffix 'IUHF' indicates the package type and temperature grade. Confirm availability through authorized Analog Devices distributors as supply may be limited. Ensure the order matches the exact part number including the '#TRPBF' tape and reel designation to avoid packaging discrepancies.

Selection Notes

Select this component when designing systems requiring four isolated PoE+ ports in a compact form factor. Consider the I2C control capability for dynamic power management. Evaluate thermal performance requirements based on the expected load per port and ambient conditions. Verify compatibility with existing network management software using the standard classification codes.

Part Context

This part belongs to the LTC4266 family of quad PSE controllers from Analog Devices. It is engineered for space-constrained networking equipment that requires compliance with IEEE 802.3at standards. The device simplifies design by integrating switches and sensing into a single IC, reducing external component count compared to discrete solutions.

Replacement Considerations

Check for direct pin-compatible alternatives within the LTC426x series if supply is constrained. Verify that any substitute maintains identical IEEE 802.3at classification logic and I2C register mapping. Ensure the replacement supports the same input voltage range and thermal characteristics.