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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.

Stereo 3.7W Class D Amplifier

General Description

The MAX98306 stereo 3.7W Class D amplifier provides

Class AB audio performance with Class D efficiency.

This device offers five selectable gain settings (6dB,

9dB, 12dB, 15dB, and 18dB) set by a single gain-select

input (GAIN).

Active emissions limiting, edge-rate, and overshoot con-

trol circuitry combined with a filterless spread-spectrum

modulation scheme (SSM) provide excellent EMI perfor-

mance while eliminating the need for output filtering found

in traditional Class D devices. These features reduce

application component count.

The IC's 2.0mA quiescent current with a 3.7V supply

extends battery life in portable applications.

The IC is available in a 14-pin TDFN (3mm x 3mm x

0.75mm) package specified over the extended -40NC to

+85NC temperature range.

Applications

Features

S

Output Power 3.7W at 3I, 10% THD, 1.7W at 8I,

10% THD, with 5V Supply

S

Passes EMI Limit Unfiltered with Up to 12in of

Speaker Cable

S

High 83dB PSRR at 217Hz

S

Spread-Spectrum Modulation and Active

Emissions Limiting

S

Five Pin-Selectable Gains

S

Excellent Click-and-Pop Suppression

S

Thermal and Overcurrent Protection

S

Low-Current Shutdown Mode

S

Space-Saving, 3mm x 3mm x 0.75mm,

14-Pin TDFN

19-5919; Rev 0; 6/11

+Denotes a lead(Pb)-free/RoHS-compliant package.

Ordering Information

Typical Application Circuit

Smartphones

Tablets

Cellular Phones

Accessory Speakers

MP3 Players

Portable Audio Players

VoIP Phones

EVALUATION

KIT

AVAILABLE

INL+

OUTL+

OUTL-

OUTR-

OUTR+

INL-

INR-

INR+

GAIN

GAIN

CONTROL

1µF

1µF

1µF

1µF

PVDD

PVDD

PGND

SHDN

MAX98306

0.1µF

10µF

+2.6V TO +5.5V

PVDD

PART

TEMP RANGE

PIN-

PACKAGE

TOP

MARK

MAX98306ETD+

-40NC to +85NC

14 TDFN

+AEV