Pending
MAX98500: Boosted speaker amplifier makes smartphone speakers louder without collapsing battery voltage
Maxim introduced the MAX98500, a boosted 2.2W Class D amplifier designed for battery-operated portable devices. This device integrates a boost converter to provide a constant output power and, therefore, louder audio output over a wide range of battery supply voltages. Additionally, the MAX98500 is uniquely equipped with a battery-tracking automatic-level-control (ALC) circuit that limits the maximum output swing as the supply voltage drops. ALC helps to avoid clipping and prevents the battery voltage from collapsing, which otherwise might cause a reset of the system. The MAX98500 is ideal for cell phones, portable media players, PDAs, netbooks, and other battery-operated audio applications.
The MAX98500 accepts a wide 2.5V to 5.5V supply range, and is operational down to 2.3V. The device delivers 2.2W of output power (8ohms, VDD = 3.6V, THD+N = 10%), and has a total efficiency of 85% (typ). Offered in a tiny (2.1mm x 2.1mm), 16-bump wafer-level package (WLP) with a 0.5mm-lead pitch, the MAX98500 is fully specified for operation over the -40 degrees Celsius to +85 degrees Celsius extended temperature range. Prices start at $0.72 (1000-up, FOB USA). An evaluation kit is available to speed designs. 
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