Low Dropout Regulator with Enable, Reset, Watchdog Functions: TQL820CA14V33, V50

The TQL820CA14V33_V50 series are high-performance low dropout voltage regulator for 3.3V and 5V with input range of 3V to 50V and low quiescent 40μA. TQL820CA14V33_V50 provides 2% output voltage accuracy and 200mA maximum driving current and is suitable for automotive or other supply systems. 
TQL820CA14V33_V50 just requires one small ceramic capacitor of 1μF to exhibit fast regulation and good stability. And it shows very low-dropout voltage with 70mV in 100mA-load and 110mV in 200mA-load. The start operating voltage is 3V which is suitable to cranking condition of automotive system.
The device has enabled function to switch ON and OFF for power dissipation. And there is Reset function to monitor output voltage for UVLO reset and power-ON delay reset with adjustable lower reset threshold function. The built-in watchdog function monitors microcontroller’s operation with flexible timings. And other protection functions such as thermal-shutdown and current-limit are against immediate damage.

Key Features

  • AEC-Q100 qualified with the following results:
    – Device temperature grade 1: -40°C to 125°C
    – Device HBM ESD classification level H2C
    – Device CDM ESD classification level C3
  • 3V to 50V Input Voltage Range
  • 3.3V Fixed Output Voltage
  • 70mV@100mA Low Dropout Voltage
  • 200mA Output Current
  • Typical 40μA Low Quiescent Current
  • Typical ±2% Output Voltage Accuracy
  • 1μF Ceramic Output Stable Capacitor
  • Programmable Delayed Reset timing at Power-On
  • Adjustable Reset Threshold Voltage
  • Flexible Watch-dog Timing and Current Dependent Deactivation
  • Enable, Under-voltage Reset
  • Over Temperature Protection
  • RoHS Compliant
  • Halogen-Free according to IEC 61249-2-21


  • Automotive Power Supply Systems
  • General Power Supply applications
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