TPS22948DCKR

The TPS22948 is a compact single-channel load switch that provides robust fault protection through output current limiting, reverse current blocking, and thermal shutdown. The on/off state of the switch is controlled by a digital input, which can be directly connected to low-voltage control signals. At initial power-up, the device uses an intelligent pull-down resistor to keep the ON pin from floating until system sequencing is complete. Once the pin is intentionally driven high, the intelligent pull-down resistor is disconnected to prevent unnecessary power dissipation. The TPS22948 is available in a standard SC-70 package and operates over a temperature range of -40°C to 125°C. The TPS22948 device is a 5.5-V, 240-mA current limited load switch in a 6-pin SC-70 package. The 300-mΩ P-channel FET is used to switch power from input to output with minimal voltage drop across the device. The TPS22948 device has a slow slew rate which helps reduce or eliminate power supply droop because of large inrush currents. During shutdown, the device has very low leakage currents, thereby reducing unnecessary leakages for downstream modules during standby. Integrated control logic and driver eliminates the need for any external components which reduces solution size and bill of materials (BOM) count. The TPS22948 load switch also provides protection features such as reverse current blocking, output current limiting and thermal shutdown.

Applications

• Consumer Electronics
• Set-Top Boxes
• HDMI Output Ports
• Laptops, Desktop Computers
• Docking Stations

Key features

• Input operating voltage range (V_IN): 2.5V to 5.5V
• Output current limit (I_LIMIT): 240mA (typical)
• Thermal shutdown (TSD)
• On-resistance (R_ON): 300mΩ (typical)
• Slow turn-on sequencing for inrush current limiting (typical): turn-on time (t_ON): 820us at 6.6mV/μs
• Always-on reverse current blocking (RCB): active state activation current (I_RCB): -200mA (typical)
• Fault indication (FLT)
• Smart ON pin pull-down resistor (R_PD,ON): ON V_IH(I_ON): 25nA (max), ON V_(R_PD,ON): 500kΩ (typical)
• Low power consumption: on-state (I_Q): 50uA (typical), shutdown state (I_SD): 0.3uA (typical)