Single-channel PSE controller with integrated switch
The MAX5971AETI+T is a single-channel Power Sourcing Equipment (PSE) controller from Analog Devices, designed to deliver up to 40 W per port in compliance with IEEE 802.3at (PoE+) and 802.3af (PoE) standards. The integrated internal switch eliminates the need for an external MOSFET, reducing BOM count and board area in compact switch or midspan designs.
Supply voltage and power delivery
Operating from a 32 V to 60 V supply rail, the device directly connects to standard PoE power sources (48 V nominal) with headroom for cable drop. The 40 W maximum power supports 802.3at Type 2 powered devices, including pan-tilt-zoom cameras, wireless access points, and thin clients. The 2.5 mA supply current keeps the controller's own dissipation low, important for thermally constrained enclosures.
Housed in a 28-WFQFN exposed pad package with a 5x5 mm 28-TQFN supplier device package, the MAX5971AETI+T suits surface-mount assembly with a thermal pad for heat sinking.
Analog Devices lists the MAX5971AETI+T as Active with ROHS3 compliance, indicating no near-term end-of-life risk for ongoing designs or production runs.