参数：Use this high side switch and usb power distribution switch TPS2554DRCR USB powered Ethernet switch from Texas Instruments to control which one of your devices draws power. With a small input voltage of 4.5 V and a max of 5.5 V, this will supply sufficient power to your circuit. Its current limit is 0.5 to 2.5 A. This product will be shipped in tape and reel packaging for quick mounting and safe delivery. This USB powered network switch has an operating temperature range of -40 °C to 125 °C.