Texas Instruments LM1117DT 3.3V 800mA LDO Voltage Regulator TO-252

The Texas Instruments LM1117DT-3.3/NOPB is a high-performance, low-dropout voltage regulator designed for stable and efficient power management. With a remarkably low dropout voltage of just 1.2V at a full load current of 800mA, it is an ideal choice for applications where the input voltage is close to the desired output, helping to maximise battery life and minimise heat dissipation.

This regulator provides a fixed 3.3V output, accurate to within ±1%, thanks to its zener-trimmed band gap reference circuit. For optimal transient response and stability, a minimum 10µF tantalum capacitor is recommended at the output. The device features built-in protection mechanisms, including current limiting and thermal shutdown, safeguarding both the regulator and your circuit from damage due to overloads or excessive temperatures.

Housed in a compact TO-252-3 (DPAK) package suitable for through-hole mounting, it shares the same pin-out as the industry-standard LM317, allowing for straightforward upgrades or replacements in existing designs. In addition to this fixed 3.3V version, the LM1117 series is also available in adjustable and other fixed voltage options (1.8V, 2.5V, 2.85V, and 5V), offering design flexibility across a wide range of projects.

This is a green product, manufactured without antimony or brominated flame retardants (No Sb/Br), aligning with environmentally conscious design principles. Its robust performance, protection features, and high accuracy make it a reliable cornerstone for power supply circuits in consumer electronics, embedded systems, and industrial controls.