USB Power SW Hi Side/DIST Dual 5.5V 0.4A 8-Pin HTSSOP EP Tube

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-mO (Typ) High-Side MOSFET

5-V 340-mO (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