LM4889

www.ti.com

SNAS157H – APRIL 2002 – REVISED MAY 2013

LM4889

1 Watt Audio Power Amplifier

Check for Samples: LM4889

1

FEATURES

DESCRIPTION

The LM4889 is an audio power amplifier primarily

23

•

Available in Space-Saving VSSOP, SOIC,

designed

for

demanding

applications

in

mobile

WSON, and DSBGA Packages

phones and other portable communication device

•

Ultra Low Current Shutdown Mode (3.3 to 2.6V

applications. It is capable of delivering 1 watt of

- 0.01µA)

continuous average power to an 8

Ω BTL load with

•

Can Drive Capacitive Loads up to 500 pF

supply.

•

Improved Pop & Click Circuitry Eliminates

Noises During Turn-On and Turn-Off

Boomer™ audio power amplifiers were designed

Transitions

specifically to provide high quality output power with a

minimal

amount

of

external

components.

The

•

2.2 - 5.5V Operation

LM4889 does not require output coupling capacitors

•

No Output Coupling Capacitors, Snubber

or bootstrap capacitors, and therefore is ideally suited

Networks or Bootstrap Capacitors Required

for mobile phone and other low voltage applications

where minimal power consumption is a primary

•

Unity-Gain Stable

requirement.

•

External Gain Configuration Capability

The LM4889 features a low-power consumption

APPLICATIONS

shutdown mode, which is achieved by driving the

shutdown pin with a logic low. Additionally, the

•

Mobile Phones

LM4889

features

an

internal

thermal

shutdown

•

PDAs

protection mechanism.

•

Portable Electronic Devices

The LM4889 contains advanced pop & click circuitry

to eliminate noise which would otherwise occur during

KEY SPECIFICATIONS

turn-on and turn-off transitions.

•

Improved PSRR at 217Hz, 5 - 3.3V 75dB

The

LM4889

is

unity-gain

stable

and

can

be

•

Power Output at 5.0V & 2% THD 1.0W(typ.)

configured by external gain-setting resistors.

•

Power Output at 3.3V & 1% THD 400mW(typ.)

•

Shutdown Current at 3.3 & 2.6V 0.01µA(typ.)

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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

Boomer is a trademark of Texas Instruments.

3

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2002–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.