TPS2071

www.ti.com TPS2070 TPS2071 SLVS287B – SEPTEMBER 2000 – REVISED SEPTEMBER 2007 FOUR-PORT USB HUB POWER CONTROLLERS FEATURES 1 2 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 μA Bus-Power Supply Current Available in 32-Pin HTSSOP PowerPAD™ Package –40°C to 85°C Ambient Temperature Range DESCRIPTION The TPS2070 and TPS2071 provide a complete USB hub power solution by incorporating four major functions: current-limited power switches for four ports, a 3.3-V 100-mA regulator, a 5-V regulator controller for self-power, 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 (can be disabled by applying a logic high to BP_DIS). Each port has a current-limited 107-mΩ N-channel MOSFET high-side power switch for 500-mA self-powered operation. Each port also has a current-limited 560-mΩ 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 not requiring a 5...