LTC4259AIGW-1#TRPBF

Overview

The LTC4259AIGW-1#TRPBF is a Power Sourcing Equipment (PSE) controller designed for IEEE 802.3af compliant Power over Ethernet applications. It integrates four independent power switch channels within a single package, enabling efficient power distribution across multiple LAN ports. The device operates with a supply voltage range of 3 V to 4 V and supports a current limit of 425 mA per channel. It features an integrated AC detection circuit to distinguish between powered devices and legacy resistive loads. The component is housed in a 36-SSOP surface-mount package and is rated for operation within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates four independent power switch channels for multi-port PoE implementations
• Includes internal AC detection circuitry for accurate Powered Device classification
• Complies with IEEE 802.3af standards for Power over Ethernet signaling

Applications

• IEEE 802.3af compliant Power Sourcing Equipment designs
• Multi-port Power over Ethernet hub controllers
• LAN infrastructure power management systems

Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm tape-and-reel packaging configuration. Confirm that the 36-SSOP package dimensions match your PCB footprint requirements. Ensure the operating temperature range meets your environmental specifications. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and supply chain integrity before procurement.

Selection Notes

Select this component when designing systems requiring four isolated PoE channels from a single controller IC. It is suitable for applications needing IEEE 802.3af compliance with integrated AC detection. Consider the 36-SSOP package constraints for board space. Evaluate the 3 V to 4 V supply requirement against your system's available voltage rails. This part is appropriate for cost-sensitive, high-density PoE deployments.

Part Context

This component belongs to the Analog Devices LTC4259 family of PoE controllers. It is specifically engineered for PSE applications, distinguishing it from Powered Device (PD) controllers like the LTC4257 series. The '1' suffix typically denotes specific pinout or feature variations within the family. It serves as a central control unit for managing power delivery over Ethernet cables in network infrastructure equipment.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify compatibility with alternative PoE controllers by comparing pinouts, electrical characteristics, and IEEE standard compliance. Consult Analog Devices technical support for validated cross-references.