TPS22946 Power Load Switch

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 300 mΩ current-limited P-channel MOSFET that can operate over an input voltage range of 1.62 V to 5.5 V. 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 155 mA. A low CL input sets the current limit to 70 mA, and a floating CL input sets the current limit to 30 mA.