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LM4817MH-LM4817MHX Fast Delivery,Good Price
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LM4817MHNS ?N/a225avai1W Stereo Audio Amplifier Plus Adjustable Output Limiter Plus Adjustable LDO
LM4817MHXNSN/a2499avai1W Stereo Audio Amplifier Plus Adjustable Output Limiter Plus Adjustable LDO


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LM4817MH-LM4817MHX
1W Stereo Audio Amplifier Plus Adjustable Output Limiter Plus Adjustable LDO
LM4817 Stereo Audio Amplifier Plus Adjustable Output
Limiter Plus Adjustable LDO
General Description

The LM4817 combinesa bridge-connected (BTL) stereo
audio power amplifier witha low dropout voltage regulator
(LDO). The audio amplifier delivers 1.0Wtoa8Ω load witha
less than 1.0% THD+N while operatingona 5V power
supply. With VLIM setto 1.0V, the amplifier outputs are
clampedto 6Vp-p, ±800mV.
With the LM4817’s adjustable low-dropout (LDO) CMOS
linear regulator deliversan output currentofupto 300mA,
has shutdown mode (1nA, typ) low quiescent current (90µA,
typ) and LDO voltage (120mV, typ). The regulatoris stable
with small ceramic capacitive load (2.2µF, typ). The regulator
includes regulation fault detection,a bandgap voltage refer-
ence, and constant current limiting.Itis designedfor low
power, low current applications that can take advantageof
its 300mA output current capability.
The LM4817 featuresan 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 specificallyto
use few external components and provide high quality output
powerina surface mount package.
Key Specifications
PO (BTL): VDD=5V, THD+N≤ 1%,RL =8Ω 1.0W(typ) Power supply range (amplifier) 3.0Vto 5.5V Power supply range (LDO) 2.5Vto 6.0V Shutdown current 0.07µA (typ) LDO output current 300mA (min) LDO dropout voltage (IOUT= 300mA) 120mV (typ) LDO quiescent supply current 90µA (typ) LDO shutdown supply current 1nA (typ) LDO PSRR 60dB LDO turn-on time 120ms (typ) LDO ouput noise-voltage 37µVRMS (typ)
Features
Stereo BTL amplifier Adjustable output voltage magnitude limiter Adjustable LDO regulator “Click and pop” suppression circuitry LDOis stable with small-value ceramic output capacitors Unity-gain stable audio amplifiers LDO has over-current protection Thermal shutdown protection circuitry TSSOP (MH) package
Applications
Multimedia monitors Portable and desktop computers Portable televisions
Connection Diagram

Top View
Order Number LM4817MH
See NS Package Number MXA28Afor TSSOP
March 2004
LM4817
Stereo
Audio
Amplifier
Plus
Adjustable
Output
Limiter
Plus
Adjustable
LDO
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