1FEATURES
23• No Output Coupling Capacitors, Snubber
Networks or Bootstrap Capacitors Required
• Unity Gain Stable
• Externally Configurable Gain
• Ultra Low Current Active Low Shutdown Mode
• BTL Output can Drive Capacitive Loads Up to
100pF
• “Click and Pop” Suppression Circuitry
• 2.7V - 9.0V Operation
• Available in Space-Saving DSBGA Package

APPLICATIONS
• Mobile Phones
• PDAs

KEY SPECIFICATIONS
• Wide Power Supply Voltage Range, 2.7 ≤ VDD ≤
9V
• Output Power: VDD = 7V, 1% THD+N, 2.4W
(Typ)
• Quiescent Power Supply Current, 3mA (Typ)
• PSRR: VDD = 5V and 3V at 217Hz, 80dB (Typ)
• Shutdown Power Supply Current, 0.01μA (Typ)

DESCRIPTION
The LM4954 is an audio power amplifier primarily
designed for demanding applications in mobile
phones and other portable communication device
applications. It is capable of delivering 2.4 Watts of
continuous average power to an 8Ω BTL load with
less than 1% THD+N from a 7VDC power supply.
Boomer audio power amplifiers are designed
specifically to provide high quality output power with a
minimal number of external components. The
LM4954 does not require output coupling capacitors
or bootstrap capacitors, and therefore is ideally suited
for lower-power portable applications where minimal
space and power consumption are primary
requirements.
The LM4954 features a low-power consumption
global shutdown mode which is achieved by driving the shutdown pin with logic low. Additionally, the
LM4954 features an internal thermal shutdown
protection mechanism.
The LM4954 contains advanced pop & click circuitry
which eliminates noises that would otherwise occur
during turn-on and turn-off transitions.
The LM4954 is unity-gain stable and can be
configured by external gain-setting resistors.