LTC4259ACGW#TRPBF

Overview

The LTC4259ACGW#TRPBF is a quad IEEE 802.3af Power over Ethernet (PoE) controller designed for Power Sourcing Equipment (PSE). It integrates four independent channels, each featuring current limiting set to 425 mA and operating within a supply voltage range of 3 V to 4 V. The device supports temperatures from 0°C to +70°C and utilizes a 36-pin SSOP package.

Feature Summary

• Integrates four independent PoE channels compliant with IEEE 802.3af standards
• Includes AC disconnect functionality for enhanced safety and compliance
• Provides precise current limiting capabilities per channel

Applications

• IEEE 802.3af compliant Power Sourcing Equipment (PSE)
• Multi-port PoE injectors and midspan devices
• Network infrastructure power distribution systems

Procurement Notes

Verify the specific suffix (#TRPBF indicates tape and reel packaging) against official Analog Devices documentation to ensure correct handling and storage requirements. Confirm that the AC disconnect variant matches system design needs, as this differs from standard versions. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and traceability before procurement.

Selection Notes

Select this component when designing multi-port PoE solutions requiring integrated AC disconnect features. Ensure the 425 mA current limit aligns with connected Powered Device (PD) specifications. Verify that the 3 V to 4 V supply voltage range fits the system's power architecture. Consider the SSOP-36 package constraints for PCB layout and thermal management during the initial design phase.

Part Context

This part belongs to the LTC4259 family of PoE controllers. It is functionally similar to the LTC4258 but includes additional AC disconnect circuitry. The #TRPBF suffix denotes a tape and reel configuration suitable for automated surface-mount assembly processes, distinguishing it from tube-packaged variants like the #PBF version.

Replacement Considerations

The LTC4258CGW#PBF is a related component in the same family but lacks the AC disconnect feature. Verify if the absence of AC disconnect meets application requirements. No other direct substitutes are confirmed in public documentation.