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Texas Instruments LM4809LQX/NOPB — Logic ICs
Texas Instruments

LM4809LQX/NOPB Class AB Audio Amplifier, 105mW x 2 @ 16Ω

MPNLM4809LQX/NOPB
End of Life

Texas Instruments Boomer® LM4809LQX/NOPB, Class AB audio amplifier, stereo headphone output, 105mW x 2 @ 16Ω, 2V to 5.5V supply, -40°C to 85°C, 8-WQFN Exposed Pad package, surface mount.

$0.23Ref. price · indicative, final on quote
LM4809LQX/NOPB datasheet
Packaging8-WQFN Exposed Pad
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

LM4809LQX/NOPB Technical Specifications
ParameterValue
TypeClass AB
SeriesBoomer®
Output typeHeadphones, 2-Channel (Stereo)
Mounting typeSurface Mount
Voltage2V ~ 5.5V
Max output power x channels @ load105mW x 2 @ 16Ohm
Operating temperature-40°C ~ 85°C (TA)
PackageBulk
Case8-WQFN Exposed Pad

Product details

105 mW per channel into 16 Ω — driving headphones from a 2 V rail

The Texas Instruments LM4809LQX/NOPB is a Boomer® Class AB audio amplifier designed for stereo headphone output. The Class AB topology gives linearity with reasonable quiescent current — no switching noise, but you trade some efficiency versus a Class D part at higher output levels. The 8-WQFN Exposed Pad package (2x2 mm) keeps the footprint small, and the exposed pad helps pull heat out when driving low-impedance loads continuously.

Supply voltage and temperature range — where this part lives

No AEC-Q qualification is listed, so it is not graded for under-hood or safety-critical automotive paths, but the temperature range itself is fine for many non-automotive harsh environments.

Package and mounting — 8-WQFN with exposed pad

The 8-WQFN Exposed Pad package (2x2 mm body) is a surface-mount part. The supplier device package is 8-WQFN (2x2).

Frequently asked questions

What is the closest pin-compatible alternative to LM4809LQX/NOPB?

Within the Boomer® family, other stereo headphone amplifiers share the same Class AB topology but may differ in output power, supply range, or package. Verify the specific pinout and footprint against the datasheet before substituting.

What is the output power of LM4809LQX/NOPB?

Maximum output power is 105 mW per channel into a 16 Ω load, stereo.