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1FEATURES

2? Integrated Charge Pump

? Bridge-Tied Load Output

? High PSRR

? I2C Volume and Mode Control

? Reset Input

? Advanced Click-and-Pop Suppression

? Low Supply Current

? Minimum External Components

? Micro-Power Shutdown

? Available in Space-Saving 16-Bump DSBGA

Package

APPLICATIONS

? Cell Phones

? Smart Phones

? Portable Media Devices

? Notebook PCs

KEY SPECIFICATIONS

? Output Voltage at VDD = 4.2V, RL = 2.2μF + 15Ω

THD+N ≤ 1%: 5.4VRMS (typ)

? Quiescent Power Supply Current at 4.2V:

3.3mA (typ)

? PSRR at 217Hz: 93dB (typ)

? Shutdown Current: 0.01μA (typ)

DESCRIPTION

The LM48823 is a single supply, mono, ceramic

speaker driver with an integrated charge-pump,

designed for portable devices, such as cell phones,

where board space is at a premium. The LM48823

charge pump allows the device to deliver 5.4VRMS

from a single 4.2V supply.

The LM48823 features high power supply rejection ratio (PSRR), 93dB at 217Hz, allowing the device to

operate in noisy environments without additional

power supply conditioning. Flexible power supply

requirements allow operation from 2.0V to 4.5V. The

LM48823 features an active low reset input that

reverts the device to its default state. Additionally, the

LM48823 features a 32-step I2C volume control. The

low power Shutdown mode reduces supply current

consumption to 0.01μA.

The LM48823’s superior click and pop suppression

eliminates audible transients on power-up/down and

during shutdown. The LM48823 is available in an

ultra-small 16-bump DSBGA package (2mmx2mm).