LM4817

The LM4817 combines a bridge-connected (BTL) stereo audio power amplifier with a low dropout voltage regulator (LDO). The audio amplifier delivers 1.0W to a 8 load with a less than 1.0% THD+N while operating on a 5V power supply. With V_LIM set to 1.0V, the amplifier outputs are clamped to 6V_p-p, ±800mV.

With the LM4817's adjustable low-dropout (LDO) CMOS linear regulator delivers an output current of up to 300mA, has shutdown mode (1nA, typ) low quiescent current (90A, typ) and LDO voltage (120mV, typ). The regulator is stable with small ceramic capacitive load (2.2F, typ). The regulator includes regulation fault detection, a bandgap voltage reference, and constant current limiting. It is designed for low power, low current applications that can take advantage of its 300mA output current capability.

The LM4817 features an externally controlled micropower shutdown mode and thermal shutdown protection. It also utilizes circuitry that reduces "clicks and pops" during device turn-on and return from shutdown.

Boomer audio power amplifiers are designed specifically to use few external components and provide high quality output power in a surface mount package.