TPS2159是TI公司的一款含LDO的开关产品，TPS2159是用于 USB 集线器的 3.3V LDO + 双路开关，工作态高电平启用，本页介绍了TPS2159的产品说明、应用、特性等，并给出了与TPS2159相关的TI元器件型号供参考。
TPS2159 - 用于 USB 集线器的 3.3V LDO + 双路开关，工作态高电平启用 - 含LDO的开关 - USB电源和充电端口控制器 - TI公司（Texas Instruments，德州仪器）
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.
- Complete Power Management Solution for USB Bus-Powered Hubs
- 3.3-V 200 mA Low-Dropout Voltage Regulator
- Two 5-V 340-m (Typ) High-Side MOSFETs
- Independent Thermal- and Short-Circuit Protection for LDO and Each Switch
- Overcurrent Indicator With Transient Filter
- 2.9-V to 5.5-V Operating Range
- CMOS- and TTL-Compatible Enable Inputs
- 75-uA (Typ) Supply Current
- Available in 8-Pin MSOP (PowerPAD™)
- -40°C to 85°C Ambient Temperature Range
- APPLICATIONS
- USB Bus-Powered Hubs
- Keyboards
- Monitors
- Hub Boxes
- USB Bus-Powered Hubs
PowerPAD is a trademark of Texas Instruments.
