Sunnyvale, Calif.—Advanced Analogic Technologies says its AAT 1142, an 800-mA voltage-scaling step-down converter for portable applications, is the first to offer dynamic voltage management through both a two-wire I2C interface and the company's single-wire Simple Serial Control (S2Cwire) digital interface.
"Most mid- to high-end handsets available today incorporate I2C, so they can easily take advantage of the power efficiencies of voltage scaling. More cost-sensitive handsets, however, simply cannot afford the hardware and firmware overhead associated with implementing I2C," explains Bill Weiss, Product Line Director. "Through its S2Cwire interface, the AAT1142 gives designers the ability to bring the power savings of voltage scaling to virtually any portable system."
The AAT1142 provides dynamic voltage management (i.e., allows the host system to quickly adjust the AAT1142 output voltage on-the-fly to track microprocessor idle-active states) in programmable steps from as low as 0.6 volt up to 2.0 volts with 50 mV resolution. Working from a 2.7- to 5.5-volt input, the converter delivers up to 93 percent efficiency. The AAT1142 features a multi-function MODE/SYNC pin that allows the user to maintain constant frequency and low noise across the operating range or synchronize the converter to an external clock.
The AAT1142 operates at 2 MHz, and thus small inductors and capacitors can be used to reduce system footprint. Over-temperature and short-circuit protection circuits are built-in. The converter also features internal soft-start and 100 percent duty-cycle, low-dropout operation.
Click here for the product datasheet.
The AAT1142, rated for operation over -40 to +85°C and available in a Pb-free, 3-by-3 mm, 12-pin TDFN package or a Pb-free, 12-pin TSOPJW package, is priced at $1.27 each in 1k quantities.
Advanced Analogic Technologies, 1-408-737 4600, www.analogictech.com