The LM386 is a highly popular, low-voltage audio power amplifier IC ideal for battery-powered projects. It runs on a supply voltage of 4V to 12V and delivers between 0.5W to 1W of power, making it perfect for driving small speakers (4Ω to 32Ω).
 
Key Specifications:
Operating Voltage: 4V to 12V (or up to 18V for the LM386N-4 variant)
Power Output: Typically 0.5W to 1W, depending on supply voltage and speaker impedance
Default Gain: 20 (internally set)
Adjustable Gain: Can be boosted up to 200 by adding a resistor and capacitor between Pins 1 and 8
 
 Applications
• AM-FM Radio Amplifiers
• Portable Tape Player Amplifiers
• Intercoms
• TV Sound Systems
• Line Drivers
• Ultrasonic Drivers
• Small Servo Drivers
• Power Converters
 
Resources:
1. LM386 Datasheet
2. Tales From the Chip: LM386 Audio Amplifier