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TPS22946 Power Load Switch


Texas Instruments’ ultra-low power load switch for system protection


Texas Instruments' TPS22946 is an ultra-low power load switch that provides protection to systems and loads in high-current conditions. The device contains a 300mΩ current-limited P-channel MOSFET that can operate over an input voltage range of 1.62V to 5.5V. The switch is controlled by an on/off input (ON), which is capable of interfacing directly with low-voltage control signals. The TPS22946 includes thermal shutdown protection that prevents damage to the device when a continuous overcurrent condition causes excessive heating by turning off the switch.

When the switch current reaches the maximum limit, the TPS22946 operates in a constant-current mode to prohibit excessive currents from causing damage. The current limit can be selected using the CL input. A high CL input sets the current limit to 155mA. A low CL input sets the current limit to 70mA, and a floating CL input sets the current limit to 30mA.
TPS22946

Features
  • Selectable minimum current limit: 155mA, 70mA, or 30mA
  • Integrated inrush current timeout (8ms)
  • Shutdown current: <1mA
  • Thermal shutdown
  • Fault blanking
  • Auto restart
  • Overcurrent condition timeout (automatic disable for permanent overcurrent)
  • 1.8V compatible control input
  • ESD performance tested per JESD 22
    • 6000V human-body model (A114-B, Class II)
  • Ultra-low quiescent current 1μA (typ) at VIN = 1.8V
Manufacturer P/N Digi-Key P/N Packaging Description  
TPS22946YZPR 296-25219-2-ND Tape & Reel (TR) IC LOAD SWITCH 6-DSBGA High-Capacitance MLCC Datasheet
296-25219-1-ND Cut Tape (CT)
296-25219-6-ND Digi-Reel®