LM48557

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SNAS486D – JULY 2009 – REVISED MAY 2013

LM48557 Boomer™ Mono, Bridge-Tied Load, Ceramic Speaker Driver with I2C Volume

Control and Reset

Check for Samples: LM48557

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FEATURES

DESCRIPTION

The LM48557 is a single supply, mono, ceramic

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Integrated Charge Pump

speaker driver with an integrated charge-pump,

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Bridge-Tied Load Output

designed for portable devices, such as cell phones

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Differential Input

and portable media players, where board space is at

a premium. The LM48557 charge pump allows the

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High PSRR

device to deliver 5.8VRMS from a single 4.2V supply.

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I2C Volume and Mode Control

The LM48557 features high power supply rejection

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Reset Input

ratio (PSRR), 80dB at 217Hz, allowing the device to

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Advanced Click-and-Pop Suppression

operate in noisy environments without additional

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Low Supply Current

power supply conditioning. Flexible power supply

requirements allow operation from 2.7V to 4.5V. The

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Minimum External Components

LM48557 features an active low reset input that

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Micro-Power Shutdown

reverts the device to its default state. Additionally, the

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Available in Space-Saving 16-Bump DSBGA

LM48557 features a 36-step I2C volume control and

Package

mute function. The low power Shutdown mode

reduces supply current consumption to 0.01µA.

APPLICATIONS

The LM48557’s superior click and pop suppression

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Mobile Phones

eliminates audible transients on power-up/down and

during shutdown. The LM48557 is available in an

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PDAs

ultra-small 16-bump DSBGA package (1.965mm x

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Notebook Electronic Devices

1.965mm).

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MP3 Players

KEY APPLICATIONS

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Output Voltage at VDD = 4.2V

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RL = 1µF +22Ω, THD+N ≤ 1%: 5.8 VRMS (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.

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Boomer is a trademark of Texas Instruments.

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All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2009–2013, 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.