General Description

The MAX4366/MAX4367/MAX4368 are bridged audio

power amplifiers intended for devices with internal

speakers and headsets. The MAX4366/MAX4367/

MAX4368 are capable of delivering 330mW of continu-

ous power into a 32

Ω load, or 200mW into a 16Ω load

with 1% THD+N from a single 5V supply.

The MAX4366/MAX4367/MAX4368 bridged outputs elimi-

nate the need for output-coupling capacitors minimizing

external component count. The MAX4366/MAX4367/

MAX4368 also feature a low-power shutdown mode,

clickless power-up/power-down and internal DC bias

generation. The MAX4366 is a unity-gain stable, program-

mable gain amplifier. The MAX4367/MAX4368 feature

internally preset gains of 2V/V and 3V/V, respectively.

All devices are available in space-saving 8-pin TDFN

and 8-bump UCSP™ chip-scale packages.

Applications

Cellular Phones

Two-Way Radios

PDAs

Headphones

Headsets

General-Purpose Audio

Features

♦ Drives 330mW into 32Ω (200mW into 16Ω)

♦ 0.02% THD+N at 1kHz (120mW into 32Ω)

♦ Internal Bridged Configuration

♦ No Output-Coupling Capacitors

♦ 2.3V to 5.5V Single-Supply Operation

♦ 2mA Supply Current

♦ Low-Power Shutdown Mode

♦ Clickless Power-Up and Shutdown

♦ Thermal Overload Protection

♦ Available in TDFN and UCSP Packages

330mW, Ultra-Small, Audio Power Amplifiers

with Shutdown

________________________________________________________________

Maxim Integrated Products

1

12

B

A

C

UCSP

TOP VIEW

(BUMP SIDE

DOWN)

3

BIAS

OUT-

SHDN

IN-

OUT+

IN+

GND

MAX4366

MAX4367

MAX4368

Pin Configurations

Ordering Information

OUT-

IN-

IN+

BIAS

AUDIO

INPUT

CLICKLESS/POPLESS

SHUTDOWNCONTROL

GND

SHDN

OUT+

MAX4367

MAX4368

Typical Operating Circuit

19-2338; Rev 5; 6/08

*

EP = Exposed pad.

+

Denotes a lead-free package.

Ordering Information continued at end of data sheet.

Selector Guide and Functional Diagrams appear at end of

data sheet.

Pin Configurations continued at end of data sheet.

UCSP is a trademark of Maxim Integrated Products, Inc.

PART

TEMP RANGE

PIN/BUMP-

PACKAGE

TOP

MARK

MAX4366EBL-T -40°C to +85°C

8 UCSP

AAK

MAX4366ETA+T -40°C to +85°C

8 TDFN-EP*

+AFZ

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim's website at www.maxim-ic.com.