1FEATURES

2• Single-Cell 0.9V to 2.5V Battery Operation

• BTL Mode for Mono Speaker

• Single-Ended Headphone Operation with

Coupling Capacitors

• Unity-Gain Stable

• Click and Pop Suppression Circuitry

• Active-Low Micropower Shutdown

• Low Current, Active-Low Mute Mode

• Thermal Shutdown Protection Circuitry

APPLICATIONS

• Portable One-Cell Audio Products

• Portable One-Cell Electronic Devices

KEY SPECIFICATIONS

• Mono-BTL Output Power

• (R L=8Ω, VDD=1.5V, THD+N=1%), 85mW (typ)

• Stereo Headphone Output Power

• (RL=16Ω, VDD=1.5V, THD+N=1%), 14mW (typ)

• Micropower Shutdown Current, 0.02μA (typ)

• Supply Voltage Operating Range,

0.9V

• PSRR 1kHz, VDD=1.5V, 66dB (typ)

DESCRIPTION

The unity gain stable LM4916 is both a mono

differential output (for bridge-tied loads or BTL) audio

power amplifier and a Single Ended (SE) stereo

headphone amplifier. Operating on a single 1.5V

supply, the mono BTL mode delivers 85mW into an

8Ω load at 1% THD+N. In Single Ended stereo

headphone mode, the amplifier delivers 14mW per

channel into a 16Ω load at 1% THD+N.

With the LM4916 packaged in the MM and WSON

packages, the customer benefits include low profile

and small size. These packages minimize PCB area

and maximizes output power.

The LM4916 features circuitry that reduces output

transients (clicks and pops) during device turn-on

and turn-off, an externally controlled, low-power

consumption, active-low shutdown mode, and thermal

shutdown. Boomer audio power amplifiers are designed specifically to use few external components

and provide high quality output power in a surface

mount package.