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3.3V LDO + Dual Switch For USB Peripherals, Active-Low Enables


Package | PIN: DGN | 8
Temp: I (-40 to 85)
Carrier: Partial Tube
Qty Price
1-9 $2.65
10-24 $2.39
25-99 $2.22
100-249 $1.95
250-499 $1.83
500-749 $1.55
750-999 $1.31
1000+ $1.25


  • 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
    • USB Peripherals
      • Digital Cameras
      • Zip Drives
      • Speakers and Headsets

PowerPAD is a trademark of Texas Instruments.

Texas Instruments  TPS2148IDGN

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.