LTC4269IDKD-2#PBF

Overview

The LTC4269IDKD-2#PBF is a Powered Device (PD) controller and power switch compliant with the IEEE 802.3at standard for high-power Power over Ethernet applications. It integrates a synchronous rectifier controller, allowing for efficient DC-to-DC conversion directly from the PoE input voltage. The device operates within a 37V to 57V input range and supports output voltages down to 3.3V. Packaged in a 32-lead DFN exposed pad, it features an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates a synchronous rectifier controller for high-efficiency DC-to-DC conversion directly from the PoE source.
• Provides comprehensive protection mechanisms including thermal shutdown, current limit, and reverse polarity protection.
• Supports Class 4 operation with integrated power monitoring and fault signaling capabilities.

Applications

• High-power IP cameras requiring up to 30W via IEEE 802.3at
• Wireless access points needing increased power budgets
• PoE-powered LED lighting fixtures

Procurement Notes

Verify the specific suffix IDKD-2 against the official Analog Devices datasheet to confirm package type and temperature grade. Ensure compatibility with the intended PoE class requirements. Check for recent Product Change Notifications (PCNs) regarding manufacturing site or material changes before finalizing procurement orders.

Selection Notes

Select this component when designing systems that require direct integration of PoE power switching and DC-DC conversion in a compact form factor. It is suitable for applications demanding high efficiency and robust protection without external discrete switches. Consider the thermal performance of the DFN package during layout design.

Part Context

This part belongs to the LTC4269 family of PoE PD controllers. It is distinct from the LTC4261 series, which focuses on hot-swap control rather than PoE compliance. The '2' suffix typically denotes specific pinout or feature variations within the family compared to the base LTC4269 model.

FAQ

Does the LTC4269IDKD-2#PBF support IEEE 802.3bt?

No, this component is certified for the IEEE 802.3at (PoE+) standard. For higher power levels defined in 802.3bt, other devices such as the LT4294 are recommended.

What is the maximum input voltage supported?

The device is designed to operate with an input voltage range of 37V to 57V, consistent with IEEE 802.3at specifications.