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Texas Instruments LM49270SQE/NOPB — Analog & Data Acquisition

LM49270SQE/NOPB Class D Audio Amplifier, 2.2W x 2 @ 4Ω

MPNLM49270SQE/NOPB
End of Life

Texas Instruments Boomer® series, Class D audio amplifier, 2-Channel (Stereo) with Stereo Headphones, 2.4V ~ 5.5V supply, -40°C ~ 85°C, Surface Mount 28-WFQFN Exposed Pad, 28-WQFN (5x5).

$2.79Ref. price · indicative, final on quote
Texas Instruments LM49270SQE/NOPB datasheet (PDF)
Packaging28-WFQFN Exposed Pad
RoHSROHS3 Compliant
SeriesBoomer®
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LM49270SQE/NOPB specifications
ParameterValue
TypeClass D
SeriesBoomer®
Output type2-Channel (Stereo) with Stereo Headphones
MountingSurface Mount
Supply voltage2.4V ~ 5.5V
Max output power x channels @ load2.2W x 2 @ 4Ohm; 177mW x 2 @ 16Ohm
Operating temperature-40°C ~ 85°C (TA)
PackageBulk
Features3D, Depop, I²C, Short-Circuit and Thermal Protection, Shutdown, Volume Control
Case28-WFQFN Exposed Pad

Product details

Class D stereo amplifier with headphone output — what this part does

The Texas Instruments LM49270SQE/NOPB is a Boomer® series Class D audio amplifier delivering 2.2W per channel into 4Ω speakers and 177mW per channel into 16Ω headphones from a single 2.4V to 5.5V supply.

Output power and load matching

Rated at 2.2W x 2 into 4Ω and 177mW x 2 into 16Ω, this part is sized for small speakers (4Ω) and standard headphones (16Ω).

The Boomer® series is a mature audio line, so the LM49270SQE/NOPB is a stable BOM line for production builds.

Frequently asked questions

Is the LM49270SQE/NOPB still active or obsolete?

The LM49270SQE/NOPB is listed as Active by Texas Instruments with no end-of-life notice. It remains a current-production part suitable for new designs and production BOMs.

What is the output power of LM49270SQE/NOPB?

It delivers 2.2W per channel into 4Ω speakers and 177mW per channel into 16Ω headphones, both in stereo.

Is LM49270SQE/NOPB compatible with 3.3V supply?

Yes, the supply range is 2.4V to 5.5V, so a 3.3V rail is well within the operating window.

What is the closest pin-compatible alternative to LM49270SQE/NOPB?

No pin-compatible second source is listed in the Texas Instruments Boomer® family. For a functional alternative, look at other Boomer® Class D parts with I²C volume control, but verify the package (28-WQFN) and output power match your design.