3.3V 800mA Linear Voltage Regulator - LD1117-3.3 TO-220

The LD1117-3.3 is a popular low dropout linear voltage regulator that converts 4-15V input down to a stable 3.3V output with 1% regulation. This TO-220 packaged regulator can supply up to 800mA current with internal current limiting and thermal shutdown protection, making it robust and reliable for electronics projects.

Key characteristics include a dropout voltage of approximately 1V, requiring a minimum input voltage of 4.3V to maintain a clean 3.3V output. Ideal for stepping down 5V power supplies to 3.3V. It has a constant quiescent current draw of 5mA and generates heat proportional to input voltage and output current, often necessitating heat sinking for higher loads.

Recommended to use with at least 10uF electrolytic capacitors on both input and output for stability. The TO-220 package makes adding a heat sink easy and efficient.

• Stable 3.3V output with 1% regulation
• Up to 800mA output current capability
• Internal current limiting and thermal shutdown protection
• Dropout voltage approximately 1V
• TO-220 package dimensions: 29mm x 10mm x 4mm
• Requires 10uF electrolytic capacitors on input and output
• Recommended heat sinking for higher power dissipation