LTC4259ACGW-1#PBF

Overview

The LTC4259ACGW-1#PBF is a quad Power Sourcing Equipment (PSE) controller compliant with IEEE 802.3af standards, designed for 48V Hot Swap applications. It integrates four independent channels within a 36-lead SSOP package. The device operates on a supply voltage ranging from 3 V to 4 V and supports a maximum operating temperature of 70°C. Each channel features a current limit of 425 mA. This component provides comprehensive protection and control logic for PoE LAN implementations.

Feature Summary

• Integrates four independent power switch controllers for simultaneous multi-port operation
• Includes AC disconnect functionality to ensure safe cable management and fault isolation
• Provides full compliance with IEEE 802.3af Power over Ethernet standards
• Supports Hot Swap capabilities for safe insertion and removal under load

Applications

• IEEE 802.3af compliant Power Sourcing Equipment (PSE)
• Multi-port PoE LAN infrastructure systems
• 48V Hot Swap controller designs
• Network interface cards requiring integrated power switching

Procurement Notes

Verify the specific suffix designation carefully during procurement. The #PBF suffix indicates lead-free packaging and RoHS compliance. Confirm that the required quantity matches the tube packaging format typically associated with this part number variant. Ensure the supplier source is authorized to guarantee authenticity, as counterfeit components may lack the specified electrical tolerances or physical markings.

Selection Notes

Select this component when designing systems requiring four independent PoE ports with integrated AC disconnect features. It is suitable for applications needing strict adherence to IEEE 802.3af protocols without external discrete switching components. Consider the 36-SSOP footprint for PCB layout constraints. Evaluate thermal dissipation requirements given the quad-channel architecture and 425 mA per-channel limit in enclosed environments.

Part Context

This part belongs to the LTC4259 family of PoE controllers manufactured by Analog Devices Inc. It serves as a specialized solution for network equipment manufacturers integrating power delivery into data transmission lines. The device simplifies design complexity by combining control logic, protection circuits, and switching elements into a single monolithic IC, reducing bill-of-materials count compared to discrete solutions.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official Analog Devices resources for cross-reference information or updated product line recommendations if this specific variant is discontinued or unavailable.