LTC9103AUKJ#PBF

Overview

The LTC9103AUKJ#PBF is an 8-channel IEEE 802.3bt Power Sourcing Equipment (PSE) controller manufactured by Analog Devices Inc. It supports PoE, PoE+, and PoE++ standards with a maximum output power of 71.3W per channel. The device operates within a supply voltage range of 3V to 3.6V and draws a supply current of 11mA. It is designed for surface mount installation in a 64-WFQFN exposed pad package measuring 7x11 mm. The component functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates eight independent channels for simultaneous PoE power sourcing
• Compliant with IEEE 802.3bt Type 4 PoE++ standards
• Supports legacy PoE and PoE+ classifications for backward compatibility

Applications

• High-density PoE switch designs requiring multiple powered devices
• Industrial networking equipment operating in extended temperature environments
• Access point infrastructure supporting high-power wireless standards

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when ordering. Confirm the package variant matches the required footprint for PCB layout. Ensure the supplier provides the official datasheet for the latest electrical characteristics. Check for any recent manufacturing updates that may affect pinout or thermal performance.

Selection Notes

Select this component for applications requiring eight isolated PoE channels from a single controller. Consider the 64-pin QFN package for space-constrained designs. Evaluate thermal management requirements given the 71.3W output capability per channel. Compare against lower-channel alternatives if fewer ports are sufficient for the system architecture.

Part Context

This part belongs to the LTC9103 family of PoE controllers. It serves as a central control unit for managing power distribution over Ethernet cables. The device integrates classification, monitoring, and protection features necessary for compliant PSE operation. It replaces older discrete solutions by consolidating control logic into a single integrated circuit.

Replacement Considerations

The LTC9103AUKJTRPBF is a tape-and-reel version of the same functional device. Verify package dimensions remain identical for direct substitution. Ensure the reel quantity meets production needs without altering electrical specifications.