LM48823

October 8, 2010

Volume Control and Reset

General Description

The LM48823 is a single supply, mono, ceramic speaker driv-

er with an integrated charge-pump, designed for portable

devices, such as cell phones, where board space is at a pre-

mium. The LM48823 charge pump allows the device to deliver

5.4V

The LM48823 features high power supply rejection ratio

(PSRR), 93dB at 217Hz, allowing the device to operate in

noisy environments without additional power supply condi-

tioning. 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,

power Shutdown mode reduces supply current consumption

to 0.01µA.

The LM48823’s superior click and pop suppression elimi-

nates audible transients on power-up/down and during shut-

down. The LM48823 is available in an ultra-small 16-bump

micro SMD package (2mmx2mm).

Key Specifications

R

5.4V

at 4.2V

3.3mA (typ)

93dB (typ)

0.01μA (typ)

Features

Applications

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