LTC4270CIUKG#PBF

Overview

The LTC4270CIUKG#PBF is a twelve-channel Power Sourcing Equipment (PSE) controller designed for IEEE 802.3at Type 1 and Type 2 PoE systems. It integrates high-side power switches, current limiters, and classification logic into a single package. The device supports LTPoE++ standards for extended power delivery. It operates within a supply voltage range of 3 V to 3.6 V and functions reliably across an industrial temperature range from -40°C to +85°C. The component utilizes a 52-lead QFN package measuring 7x8 mm.

Feature Summary

• Integrates twelve independent high-side power channels with individual control capabilities
• Supports IEEE 802.3at Type 1 and Type 2 classifications for standard and high-power applications
• Enables LTPoE++ protocol for delivering power beyond standard PoE limits
• Includes integrated protection mechanisms against overcurrent and thermal events

Applications

• High-density PoE switch modules requiring multiple powered ports
• Industrial networking equipment operating in extreme temperature environments
• Access points and wireless controllers supporting advanced power protocols
• Surveillance systems utilizing high-power PTZ cameras via Ethernet

Procurement Notes

Verify the specific suffix 'I' indicates the industrial temperature grade (-40°C to +85°C). Confirm the 'UKG' package code corresponds to the 52-lead 7x8mm QFN footprint. Ensure compatibility with upstream management interfaces before integration. Cross-reference the datasheet revision date to confirm pinout consistency with existing designs.

Selection Notes

Select this component when deploying twelve-port architectures requiring unified control. It is suitable for designs needing compliance with both legacy 802.3af and modern 802.3at standards. Consider the thermal dissipation requirements of the QFN package during PCB layout. Evaluate system power budget constraints against the maximum output capabilities defined in the electrical characteristics table.

Part Context

This part belongs to the LTC4270/LTC4271 family of PoE controllers manufactured by Analog Devices. These devices are engineered to simplify the design of complex power distribution networks over Ethernet cables. The series provides a compact solution for replacing discrete transistor-based implementations, reducing board space and component count in modern network infrastructure hardware.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify functional equivalence carefully if considering alternative manufacturers, as pinouts and internal protection thresholds may differ significantly between PoE controller families.