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TPS22949A Datasheet Current-limited Load Switch

Manufacturer: Texas Instruments

Overview: Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TPS22949, TPS22949A SLVS908D – FEBRUARY 2009 – REVISED JUNE 2015 TPS22949x Current-Limited Load Switch With Low Noise Regulation.

This datasheet includes multiple variants, all published together in a single manufacturer document.

General Description

The TPS22949 and TPS22949A are devices that provide protection to systems and loads in highcurrent conditions.

The device contains a 500-mΩ current-limited P-channel MOSFET that can operate over an input voltage range of 1.62 V to 4.5 V as well as a low-dropout (LDO) regulator with a fixed output voltage of 1.8 V.

The switch is controlled by an on/off input (EN1), which can interface directly with low-voltage control signals.

Key Features

  • 1 Integrated Current Limiter.
  • Input Voltage Range: 1.62 V to 4.5 V.
  • Low ON-Resistance.
  • rON = 300-mΩ at VIN = 4.5 V.
  • rON = 350-mΩ at VIN = 3.3 V.
  • rON = 400-mΩ at VIN = 2.5 V.
  • rON = 600-mΩ at VIN = 1.8 V.
  • Integrated 100-mA Minimum Current Limit.
  • Undervoltage Lockout.
  • Fast-Current Limit Response Time.
  • Integrated Fault Blanking and Auto Restart.
  • Stable Without Current Limiter Output Capacitor.

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