LTC4258CGW#PBF

Overview

The LTC4258CGW#PBF is a Power Sourcing Equipment (PSE) controller compliant with IEEE 802.3af standards, designed for PoE applications. It integrates four independent channels within an SSOP-36 package. The device operates on a supply voltage of 3 V to 4 V and draws a typical operating current of 2.5 mA. Each channel supports a current limit of 425 mA. It functions within a temperature range of 0°C to +70°C.

Feature Summary

• Integrates four independent power switch controllers for multi-port PoE implementations
• Complies with IEEE 802.3af Power over Ethernet standards
• Includes integrated detection circuitry for powered device identification

Applications

• IEEE 802.3af compliant Power Sourcing Equipment designs
• Multi-port LAN infrastructure power distribution
• PoE network switches and hubs

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when sourcing. Confirm the SSOP-36 package dimensions against your PCB footprint requirements. Ensure the 3 V to 4 V control voltage range matches your system logic levels. Check for any recent Product Change Notifications that may affect pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this component for designs requiring four isolated PoE ports under the 802.3af standard. The integrated nature reduces external component count compared to discrete solutions. Verify that the 425 mA per-channel limit meets the maximum power budget of your connected devices. Consider thermal management strategies given the SSOP-36 package constraints in high-density layouts.

Part Context

This part belongs to the Analog Devices LTC4258 series of PoE controllers. It serves as a specialized PMIC solution for network interface power delivery. The CGW variant specifies the commercial temperature grade and SSOP-36 packaging format within the broader family of power switching ICs.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.