The SI3454-B01-IMR is a Power Switch IC (PSE) from Silicon Labs that provides Power-over-Ethernet (POE) and LAN Quad 802.3at for networked devices. This IC is used to supply power to networked hardware without the need for additional power supplies. It is capable of providing up to 20W of power with up to four ports managed as a single device. This IC is ideal for applications such as IP phones, wireless access points, IP cameras, Building Automation Systems, and many others. This IC features advanced system-on-chip technology including an integrated 4-port transformer controller, an integrated voltage regulator, and a highly integrated state machine. It has integrated protection features with support for IEEE 802.3af/at, PoE+, Class 3, Class 4, and Class 5 modes. It offers enhanced diagnostics with support for 802.3at Advanced Link Information, auto-detect and detect.