TPS2149中文资料2-ch, 0.15A loading, 340mΩ USB power switch, active-low + 3.3V LDO shared input with switches数据手册TI规格书

描述 Description

The TPS2149 incorporates two power distribution switches and an LDO in one small package, providing a USB bus-powered hub power management solution that saves up to 60% in board space over typical implementations. The TPS2149 meets USB 2.0 bus-powered hub requirements. An integrated LDO regulates the 5-V bus power down to 3.3 V for the USB controller. The two MOSFET switches provide power to the downstream ports. With independent enables, the downstream ports remain unpowered until the hub completes enumeration. Each power-distribution switch is capable of supplying 200 mA of continuous current, and the independent logic enables are compatible with 5-V logic and 3-V logic. The switches and the LDO are designed with controlled rise times and fall times to minimize current surges. The TPS2149 has active-low enables while the TPS2159 has active-high enables.

特性 Features

• Complete Power Management Solution for USB Bus-Powered Hubs
• Two 5-V 340-m (Typ) High-Side MOSFETs
• Overcurrent Indicator With Transient Filter
• CMOS- and TTL-Compatible Enable Inputs
• Available in 8-Pin MSOP (PowerPAD™)
• APPLICATIONS
• Keyboards
• Hub Boxes


PowerPAD is a trademark of Texas Instruments.