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LM4879IBLNSCN/a50000avai1.1 Watt Audio Power Amplifier
LM4879IBLXNSN/a5852avai1.1 Watt Audio Power Amplifier
LM4879IBPNSCN/a250avai1.1 Watt Audio Power Amplifier
LM4879IBPXNATIONALN/a3000avai1.1 Watt Audio Power Amplifier
LM4879ITLNSN/a230avai1.1 Watt Audio Power Amplifier
LM4879ITLXNSN/a1848avai1.1 Watt Audio Power Amplifier
LM4879ITPXNSN/a20000avai1.1 Watt Audio Power Amplifier
LM4879MMNSCN/a10000avai1.1 Watt Audio Power Amplifier
LM4879MMNSN/a3523avai1.1 Watt Audio Power Amplifier
LM4879MMXNSN/a3500avai1.1 Watt Audio Power Amplifier
LM4879SDNSN/a456avai1.1 Watt Audio Power Amplifier


LM4879IBL ,1.1 Watt Audio Power Amplifierapplications. It is capable ofjdelivering 1.1 watt of continuous average power to an 8Ω Power Outpu ..
LM4879IBLX ,1.1 Watt Audio Power AmplifierGeneral Description Key SpecificationsThe LM4879 is an audio power amplifier primarily designedj PS ..
LM4879IBP ,1.1 Watt Audio Power Amplifierfeatures a low-power consumption global shut-capacitordown mode, which is achieved by driving the s ..
LM4879IBPX ,1.1 Watt Audio Power Amplifierfeatures an internaln Advanced pop & click circuitry eliminates noises duringthermal shutdown prote ..
LM4879ITL ,1.1 Watt Audio Power AmplifierLM4879 1.1 Watt Audio Power AmplifierOctober 2004LM48791.1 Watt Audio Power Amplifier
LM4879ITLX ,1.1 Watt Audio Power Amplifierfeatures an internaln Advanced pop & click circuitry eliminates noises duringthermal shutdown prote ..
LP2985A-28DBVTG4 , 150-mA LOW-NOISE LOW-DROPOUT REGULATOR WITH SHUTDOWN
LP2985A-29DBVR ,Single Output LDO, 150mA, Fixed(2.9V), 1.0% Tolerance, Low Quiescent Current, Low Noise 5-SOT-23 -40 to 125
LP2985A-30DBVR ,150MA LOW NOISE LOW DROPOUT REGULATOR WITH SHUTDOWN
LP2985A-30DBVTG4 ,Single Output LDO, 150mA, Fixed(3.0V), 1.0% Tolerance, Low Quiescent Current, Low Noise 5-SOT-23 -40 to 125
LP2985A-33DBVR ,13
LP2985A-33DBVTG4 ,Single Output LDO, 150mA, Fixed(3.3V), 1.0% Tolerance, Low Quiescent Current, Low Noise 5-SOT-23 -40 to 125


LM4879IBL-LM4879IBLX-LM4879IBP-LM4879IBPX-LM4879ITL-LM4879ITLX-LM4879ITPX-LM4879MM-LM4879MMX-LM4879SD
1.1 Watt Audio Power Amplifier
LM4879
1.1 Watt Audio Power Amplifier
General Description

The LM4879isan audio power amplifier primarily designed
for demanding applicationsin mobile phones and other por-
table communication device applications.Itis capableof
delivering 1.1 wattof continuous average powertoan 8Ω
BTL load with less than1% distortion (THD+N) froma 5VDC
power supply.
Boomer audio power amplifiers were designed specificallyto
provide high quality output power witha minimal amountof
external components. The LM4879 doesnot require output
coupling capacitorsor bootstrap capacitors, and thereforeis
ideally suitedfor lower-power portable applications where
minimal space and power consumption are primary require-
ments.
The LM4879 featuresa low-power consumption global shut-
down mode, whichis achievedby driving the shutdownpin
with logic low. Additionally, the LM4879 featuresan internal
thermal shutdown protection mechanism.
The LM4879 contains advanced pop& click circuitry which
eliminates noises which would otherwise occur during
turn-on and turn-off transitions.
The LM4879is unity-gain stable and canbe configuredby
external gain-setting resistors.
Key Specifications
PSRR: 5V,3V@ 217Hz 62dB (typ) Power Outputat5V& 1% THD+N 1.1W (typ) Power Outputat3V& 1% THD+N 350mW (typ) Shutdown Current 0.1µA (typ)
Features
No output coupling capacitors, snubber networksor
bootstrap capacitors required Unity gain stable Ultra low current shutdown mode Fast turnon: 80ms (typ), 110ms (max) with 1.0µF
capacitor BTL output can drive capacitive loadsupto 100pF Advanced pop& click circuitry eliminates noises during
turn-on and turn-off transitions 2.2V- 5.0V operation Availablein space-saving µSMD, LLP, and MSOP
packages
Applications
Mobile Phones PDAs Portable electronic devices
Typical Application

FIGURE1. Typical Audio Amplifier Application Circuit
October 2004
LM4879
att
Audio
Power
Amplifier
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