LTC4259AIGW-1#PBF

Overview

The LTC4259AIGW-1#PBF is a Power Sourcing Equipment (PSE) controller designed for IEEE 802.3af compliant Power over Ethernet applications. It integrates four independent channels within a single package, supporting up to 425 mA current limit per port. The device operates on a supply voltage range of 3 V to 4 V and functions within a commercial temperature range of 0°C to +70°C. Housed in a 36-pin SSOP package, it provides comprehensive management for PoE power delivery.

Feature Summary

• Integrates four independent IEEE 802.3af PSE controllers for multi-port deployment
• Includes AC disconnect functionality for safe power termination
• Supports standard PoE classification and power negotiation protocols

Applications

• IEEE 802.3af compliant Power over Ethernet switches
• Multi-port LAN infrastructure equipment
• Network interface cards requiring integrated PoE sourcing

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm the specific suffix matches the required operational specifications. Check current availability status as supply may be limited. Ensure storage conditions comply with manufacturer guidelines for moisture-sensitive devices prior to assembly.

Selection Notes

Select this component when designing systems requiring multiple PoE ports managed by a single controller. It is suitable for applications needing integrated AC disconnect features. Consider the 36-SSOP footprint during PCB layout. Verify that the 3 V to 4 V supply rail aligns with the system's power architecture requirements.

Part Context

This part belongs to the LTC4259 series of PoE controllers from Analog Devices. It serves as a centralized solution for managing power distribution in network hardware. The device simplifies design by combining control logic and protection features into one integrated circuit, reducing component count compared to discrete solutions.

Replacement Considerations

Consult official documentation for direct pin-compatible substitutes. Verify electrical parameters such as current limits and operating voltage ranges before substitution. Ensure any alternative component maintains IEEE 802.3af compliance and supports the required number of channels.