1.4W mono Class AB in a small exposed-pad package
The MAX9717DEUA is a low-cost, mono Class AB audio amplifier delivering 1.4W into a 4Ω load from a single 2.7V to 5.5V supply — the supply range covers single-cell Li-ion (3.6V nominal) through 5V USB rails, so no extra regulator is needed for the audio section in most portable designs. Housed in an 8-TSSOP/8-MSOP with exposed pad (3.00mm width), the package lets the die conduct heat directly to the PCB copper pour — for a 1.4W output at 4Ω, the thermal pad keeps the junction below the 85°C ambient ceiling without forced airflow, as long as the PCB land pattern follows the recommended footprint in the datasheet.
Supply, temperature, and output ratings
Operating from 2.7V to 5.5V, the amplifier's PSRR holds the audio band clean even when the supply rail carries digital switching noise from an adjacent DC-DC converter — the Class AB topology inherently rejects ripple better than a Class D stage at the same quiescent current. Rated for -40°C to +85°C ambient, the device suits industrial sensor interfaces, portable instrumentation, and battery-powered audio alerts that must function across a factory floor or outdoor temperature swing. The single-channel (mono) output is specified as 1.4W into a 4Ω load — that power figure assumes the supply is at the upper end of the range; at 3.6V (Li-ion nominal) the available output drops, so the actual SPL in a portable speaker depends on the battery voltage during discharge.
Active production, sourced to order
Available through independent distribution channels; pricing and lead time are confirmed at RFQ against the specific BOM quantity and required date-code window.