LM5070SDX-80

The LM5070SDX-80 is a power-over-ethernet (PoE) controller integrated with a switch-mode power supply (SMPS) for single-port PoE applications. It offers adjustable power up to 80W over a single port and is available in an 8-pin thermally enhanced 3mm x 3mm TDFN package. The LM5070SDX-80 also includes both a DC/DC and an LDO, allowing flexible application choice from low-power operation to high-power systems.

The LM5070SDX-80 is an ideal solution for PoE applications where high-power operation is required. The device is compliant with IEEE 802.3at and the IEEE 802.3af standards and is designed to provide efficient power and heat dissipation to support a wide range of DC and AC input voltages. The high power-to-footprint ratio and the low external component count make the LM5070SDX-80 an ideal solution for PoE applications such as IP phones, IP cameras, access points, and many others.

The LM5070SDX-80 offers two different operating modes that are selected by the REV/HIZ pin: an active DC/DC converter mode and an auxiliary low-dropout (LDO) mode. In the active converter mode, the LM5070SDX-80 starts up in a Green_Mode, allowing for power saving and proper power management for the connected device. In the auxiliary mode LEDs are enabled with a constant current source. The LM5070SDX-80 also supports both under-voltage and over-voltage detection for enhanced port protection.

The LM5070SDX-80 includes a wide range of protection features, such as over-current protection (OCP), over-voltage protection (OVP), and under-voltage shutdown (UVLO). The device also features an adjustable DC/DC operating frequency, allowing for easy optimization of the power supply design. The efficient design of the LM5070SDX-80 minimizes the number of external components required, making it an ideal solution for PoE applications that require a high power-to-footprint ratio.

In conclusion, the LM5070SDX-80 is the ideal solution for PoE applications requiring high power efficiency and reliability. The device offers adjustable power up to 80W over a single port, with a wide range of support for different DC and AC input voltages. Its combination of a DC/DC converter and an auxiliary low-dropout (LDO) mode ensure optimal power management and protection features, while the high power-to-footprint ratio and low external component count make the LM5070SDX-80 an ideal solution for PoE applications.