TPS2158是TI公司的一款含LDO的开关产品,TPS2158是用于 USB 外设的 3.3V LDO + 双路开关,工作态高电平启用,本页介绍了TPS2158的产品说明、应用、特性等,并给出了与TPS2158相关的TI元器件型号供参考。
TPS2158 - 用于 USB 外设的 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 TPS2148 incorporates two power distribution switches and an LDO in one small package, providing a USB peripheral power management solution that saves up to 60% in board space over typical implementations.
The TPS2148 meets USB 2.0 bus-powered peripheral requirements. An integrated LDO regulates the 5-V bus power down to 3.3 V for the USB controller, and a MOSFET switch that is internally connected to the output of the LDO simplifies meeting the suspend and enumeration current requirements imposed by the USB specification.
A second switch is available to support a downstream port, stage power to a second voltage regulator, or disable power to selected circuitry in power-save modes.
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 TPS2148 has active-low enables while the TPS2158 has active-high enables.
- Complete Power Management Solution for USB Bus-Powered Peripherals
- 3.3-V 200 mA Low-Dropout Voltage Regulator With Enable
- 3.3-V 340-m (Typ) High-Side MOSFET
- 5-V 340-m (Typ) High-Side MOSFET
- Independent Thermal- and Short-Circuit Protection for LDO and Each Switch
- 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 Peripherals
- Digital Cameras
- Zip Drives
- Speakers and Headsets
- USB Peripherals
PowerPAD is a trademark of Texas Instruments.