LM1117 Low-Dropout Linear Regulators

LM1117 Low-Dropout Linear Regulators

Texas Instruments' LM1117 is a low dropout voltage regulator with a dropout of 1.2 V at 800 mA of load current. The LM1117 is available in an adjustable version, which can set the output voltage from 1.25 V to 13.8 V with only two external resistors. In addition, it is available in five fixed voltages: 1.8 V, 2.5 V, 3.3 V, and 5 V. The LM1117 offers current limiting and thermal shutdown. Its circuit includes a Zener trimmed bandgap reference to assure output voltage accuracy to within ±1%. A minimum of 10 µF tantalum capacitor is required at the output to improve the transient response and stability.

Features
  • Available in 1.8 V, 2.5 V, 3.3 V, 5 V, and adjustable versions
  • Space-saving SOT-223 and WSON packages
  • Current limiting and thermal protection
  • Output current 800 mA
  • Line regulation 0.2% (maximum)
  • Load regulation 0.4% (maximum)
  • Temperature range
    • LM1117: 0°C to ±125°C
    • LM1117I: -40°C to ±125°C
Manufacturer