1FEATURES
2• Stereo BTL Amplifier Mode
• “Click and Pop” Suppression Circuitry
• Unity-Gain Stable
• Thermal Shutdown Protection Circuitry
• TSSOP and Exposed-DAP WQFN Packages

KEY SPECIFICATIONS
• PO at 1% THD+N low–
LM4866LQ, 3Ω load: 2.5W(typ)
– LM4866LQ, 4Ω load: 2.2W(typ)
– LM4866MTE, 3Ω load: 2.5W(typ)
– LM4866MTE, 4Ω load: 2.2W(typ)
– LM4866MTE, 8Ω load: 1.1W(typ)
– LM4866MT, 8Ω load: 1.1W(typ)
• Shutdown current: 0.7μA(typ)
• Supply voltage range: 2.0V to 5.5V

APPLICATIONS
• Multimedia Monitors
• Portable and Desktop Computers
• Portable Televisions

DESCRIPTION
The LM4866 is a bridge-connected (BTL) stereo
audio power amplifier which, when connected to a 5V
supply, delivers 2.2W to a 4Ω load or 2.5W to a 3Ω
load with less than 1.0% THD+N (see Notes below).
With the LM4866 packaged in the WQFN, the
customer benefits include low thermal impedance,
low profile, and small size. This package minimizes
PCB area and maximizes output power.
The LM4866 features an externally controlled, low–
power consumption shutdown mode, and thermal
shutdown protection. It also utilizes circuitry to reduce
“clicks and pops” during device turn-on.
Boomer audio power amplifiers are designed
specifically to use few external components and
provide high quality output power in a surface mount
package.
Note: An LM4866PWP or LM4866NHW that has
been properly mounted to a circuit board will deliver
2.2W into 4Ω. The other package options for the
LM4866 will deliver 1.1W into 8Ω. See the Application
Information sections for further information
concerning the LM4866PWP and LM4866NHW.
Note: An LM4866PWP or LM4866NHW that has
been properly mounted to a circuit board will deliver
2.5W into 3Ω.