The FA7623 is a low RDS(ON), up to 3A low loss power distribution switch with a fixed current limit to protect the power source from over current or short circuit conditions. The power switch is controlled by an on/off input (EN/ENb), which is capable of interfacing directly with low-voltage control signals. A 170Ω on-chip load resistor is added for output discharge when the switch is turned off.
The FLAGb pin is an open-drain output that asserts (active low) when over-current or over-temperature events. The FLAGb signal remains asserted until the fault condition is removed and the device resumes normal operation. The FA7623 is designed to eliminate false fault reporting by using an internal deglitch circuit.


  • Typical 60mΩ On Resistance
  • Support Active-High Enable EN or Active-Low Enable ENb
  • Built-in Soft-Start
  • Output Discharge when Switch Disabled
  • True Reverse Current Blocking when Switch OFF
  • Output Reverse Current Protection (RCP)
  • Output Over Current Protection (OCP)
  • Over Temperature Protection (OTP)
  • Fault Flag Output
  • SOT-23-5L and TSOT-23-5L Packages
  • Halogen Free and Green Devices (RoHS Compliant)
  • UL Listed File No. E501281 and CB certified


Part No. Vin_min (V) Vin_max (V) Configuration Loading (A) Rdson (mΩ) Output Discharge Adjustable Soft Start Timing Current Limit Reverse Current Protection (RCP) VOUT Breakdown OVP OTP
3 5.5 Single 1/1.5/2/2.5/3 60 N/A 6V