UTC LM386G Low-Voltage Audio Power Amplifier SOP-8 SMD IC

The UTC LM386G is a high-efficiency monolithic integrated circuit engineered for low-power acoustic amplification in compact consumer and industrial electronic layouts. Housed in a space-saving SOP-8 surface-mount package, this chip operates over a wide 4V–12V supply range with exceptionally low 4mA quiescent current drain. It is an industry-standard choice for battery-powered audio devices, communication intercoms, and portable sensor signal amplification.

The internal design self-biases outputs to one-half the supply voltage, eliminating bulky output coupling transformers. Voltage gain is internally set to 20 (26dB) and can be extended up to 200 (46dB) with an external resistor and capacitor across pins 1 and 8.

Key Specifications

• Manufacturer: UTC (Unisonic Technologies Co., Ltd.)
• Part Number: UTC LM386G
• Ordering Number: LM386G-S08-R
• Package: SOP-8 (8-pin Small Outline)
• Packaging: Tape & Reel (SMT assembly)
• Supply Voltage (Vcc): 4.0V to 12.0V DC
• Quiescent Current (Iq): 4 mA typical at 6V
• Output Power: ~325 mW into 8Ω at 6V (10% THD)
• Voltage Gain: 20 (26dB) internal; up to 200 (46dB) with external components
• THD: 0.2% typical
• Mounting Style: SMD / SMT
• Compliance: RoHS, Halogen-Free (Green “G” suffix)

Applications

• Battery-powered portable radios as the primary audio driver for AM/FM transistor radios, walkie-talkies, and scanning receivers
• Intercom and communication systems for low-distortion voice amplification in gate intercoms, security panels, and two-way voice modules
• Microcontroller audio output for amplifying tone, voice, or sound wave signals from Arduino, ESP32, or Raspberry Pi DAC pins to a loudspeaker
• Ultrasound and sensor pre-amplifiers for boosting low-amplitude signals from acoustic transducers, piezo buzzers, and microphone boards

Package Includes

• 1 x UTC LM386G SOP-8 Audio Power Amplifier IC

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