TPS2074中文资料用于总线/自供电 USB 集线器的电源控制器，具有 3.3V LDO、8 个电源开关以及低电平有效 BPMode 指示器数据手册TI规格书

描述 Description

The TPS2074 and TPS2075 provide a complete USB hub power solution by incorporating three major functions: current-limited power switches for four ports, a 3.3-V 100-mA regulator, and a DP0 line control to signal attach/detach of the hub. These devices are designed to meet bus-powered and self-powered hub requirements. These devices are also designed for hybrid hub implementations and allow for automatic switching from self-powered mode to bus-powered mode if loss of self-power is experienced. This feature can be disabled by applying a logic high to the BP_DIS input Each port has a current-limited 100-m N-channel MOSFET high-side power switch for 100-mA bus-powered operation. All the N-channel MOSFETs are designed without parasitic diodes, preventing current backflow into the inputs. For applications where a 5-V regulator is needed, use the TPS2070 or TPS2071 device.

特性 Features

• Complete USB Hub Power Solution
• Meets USB Specifications 1.1 and 2.0
• Independent Thermal and Short-Circuit Protection
• 3.3-V Regulator for USB Hub Controller
• Overcurrent Logic Outputs
• 4.5-V to 5.5-V Operating Range
• CMOS- and TTL-Compatible Enable Inputs
• 185 uA Bus-Power Supply Current
• Available in 24-Pin SSOP Package
• -40°C to 85°C Ambient Temperature Range