GENERAL DESCRIPTION
The PT5381 is an audio power amplifier mainly
designed for applications in mobile phones and other
portable communication device applications. It is
capable of delivering 1.25 watts of continuous average
power to an 8Ω load and 2 watts of continuous average
power to a 4Ω load with less than 1% distortion
(THD+N) from a 5V power supply. The PT5381 does
not require output coupling capacitors or bootstrap
capacitors, and therefore is ideally suited for mobile
phone and other low voltage applications where
minimal power consumption is a primary requirement.
The PT5381 features a low-power shutdown mode and
improved pop & click circuitry that attenuates noise
which would otherwise occur during turn on and turn
off transactions. The PT5381 is delivered with
miniature MSOP-8 (Pd free).

 

FEATURES
􀁺 Low Distortion
0.50W @ VDD=5.0V, RL=8Ω THD+N = 0.03%
0.25W @ VDD=3.0V, RL=8Ω THD+N = 0.04%
0.15W @ VDD=2.6V, RL=8Ω THD+N = 0.05%
􀁺 Output Power @ 1% THD+N
1.25W @ VDD=5.0V, RL=8Ω
2.0W @ VDD=5.0V, RL=4Ω
0.425W @ VDD=3.0V, RL=8Ω
0.60W @ VDD=3.0V, RL=4Ω
0.30W @ VDD=2.6V, RL=8Ω
0.40W @ VDD=2.6V, RL=4Ω
􀁺 Ultra low shutdown current
􀁺 Improved pop & click noise eliminating function
􀁺 No need for output coupling or bootstrap
capacitors
􀁺 2.2 -5.5V operation supply voltage
􀁺 Thermal protection
􀁺 External gain configuration capability
􀁺 Pd free MSOP-8 packages
􀁺 Unity-gain stable

 

APPLICATION
􀁺 Mobil Phones
􀁺 PDAs
􀁺 Portable electronic devices