The FA2251 is a linear regulator designed for supplying power to systems with high-voltage batteries. It includes a wide 2.2V to 24V input range, low dropout voltage, and low quiescent supply current. The low quiescent current and low dropout voltage allow operations at extremely low power levels. Therefore, the FA2251 is ideal for low-power microcontrollers and battery-powered equipment.
The FA2251 also includes thermal shutdown and current limiting fault protection. The regulator output current is internally limited to protect against overload and over-temperature conditions.


  • 2.2V to 24V Input Range
  • 1.24V to 15V Adjustable Output Range
  • 5μA Quiescent Current
  • Support 200mA Specified Current
  • Output ±2% Accuracy
  • Over-Current and Thermal Shutdown Protection
  • SOT-23-5L Package
  • Halogen Free and Green Devices (RoHS Compliant)


Part No. Vin_min (V) Vin_max (V) Vout adj. range (V) Fixed Vout (V) Current Loading (mA) Quiescent Current (μA) Dropout Voltage (mV) PSRR (dB) OTP OCP
2.2 24 1.24~15 N/A 200 5 600 50