PoE+ PD controller for powered-device designs
The MAX5969BETB+T is a single-channel Power-over-Ethernet (PoE) Powered Device (PD) controller from Analog Devices, compliant with both 802.3af (PoE) and 802.3at (PoE+) standards. It integrates the internal switching MOSFET and delivers up to 25.5 W to the load, making it suitable for high-power PDs like IP cameras, wireless access points, and VoIP phones that draw the full PoE+ budget.
What the 25.5 W rating means for your BOM
The 25.5 W maximum power delivery corresponds to the full Class 4 (802.3at) allocation from a PSE. This means the controller can support loads that require the entire PoE+ budget — a typical dual-radio 802.11ac access point drawing 18-22 W still has headroom for the controller's own 270 µA supply current and the auxiliary sense circuit. The 40 V to 60 V supply range covers the full PoE voltage envelope from the PSE output, including the 44-57 V range typical after cable drop. The internal switch eliminates an external FET, saving board space in the 10-TDFN (3x3 mm) package.
Active production, ROHS3 compliant
It is ROHS3 compliant, meeting the latest EU directive for lead-free and restricted-substance materials.