Sunnyvale, Calif. - Advanced Analogic Technologies' AAT3258 combines a 300-mA low-dropout regulator (LDO) with a microprocessor reset function in half the space of two discrete devices for cellular phone, PDA, digital camera, and notebook computer applications.
"Today's high performance portable products often employ multiple processors, controllers, or DSPs to deliver the demanding feature sets customers require," said Erik Ogren, product marketing manager. "By combining a microprocessor reset monitor and a 300-mA LDO regulator in a single 3-by-2.85 mm package, the AAT3258 significantly minimizes design footprint. With separate input pins, the AAT3258 also maximizes design flexibility by allowing designers to operate each function from independent sources, and more easily and efficiently configure their design."
The AAT3258 has been optimized for very fast start-up and shut-down for systems such as GSM phones that quickly go from the sleep mode to full power. The LDO's dropout voltage is 400 mV at 300 mA. Quiescent operating current is 71 microamps. The AAT3258 features over-current, short-circuit, and over-temperature protection. Its LDO regulator is optimized to function with low-cost, low ESR ceramic capacitors, and supports operation over a wide range of capacitor types.
The AAT3258, in an 8-pin TSOPJW package, is rated for operation over -40 to +85°C. Pricing starts at 76 cents per unit in 1k-piece quantities.