LM386 Low Voltage Audio Power Amplifier

1 Features

• Battery Operation

• Minimum External Parts

• Wide Supply Voltage Range: 4 V–12 V or

5 V–18 V

• Low Quiescent Current Drain: 4 mA

• Voltage Gains from 20 to 200

• Ground-Referenced Input

• Self-Centering Output Quiescent Voltage

• Low Distortion: 0.2% (AV = 20, VS = 6 V, RL = 8 Ω,

PO = 125 mW, f = 1 kHz)

• Available in 8-Pin MSOP Package

2 Applications

• AM-FM Radio Amplifiers

• Portable Tape Player Amplifiers

• Intercoms

• TV Sound Systems

• Line Drivers

• Ultrasonic Drivers

• Small Servo Drivers

• Power Converters

3 Description

The LM386M-1 and LM386MX-1 are power amplifiers

designed

for

use

in

low

voltage

consumer

applications. The gain is internally set to 20 to keep

external part count low, but the addition of an external

resistor and capacitor between pins 1 and 8 increases

the gain to any value from 20 to 200.

The inputs are ground referenced while the output

automatically biases to one-half the supply voltage.

The quiescent power drain is only 24 mW when

operating from a 6-V supply, making the LM386M-1

and LM386MX-1 prefered for battery operation.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

LM386N-1

PDIP (8)

9.60 mm × 6.35 mm

LM386N-3

PDIP (8)

9.60 mm × 6.35 mm

LM386N-4

PDIP (8)

9.60 mm × 6.35 mm

LM386M-1

SOIC (8)

4.90 mm × 3.90 mm

LM386MX-1

SOIC (8)

4.90 mm × 3.90 mm

LM386MMX-1

VSSOP (8)

3.00 mm × 3.00 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

GAIN

1

GAIN

8

15 k

15 k

150

1.35 k

15 k

50 k

3

+ INPUT

6

5

V

S

V

OUT

GND

4

- INPUT

2

50 k

BYPASS

7

Schematic

LM386

SNAS545D – MAY 2004 – REVISED AUGUST 2023

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.