Advanced Analogic Technologies (AnalogicTech) announced the AAT1110, an 800-mA step-down dc-to-dc converter that's housed in a 2.0- by 2.1-mm SC70JW package. Suited for fast transient response, the part can powering up heavy loads in high-performance, ultra-portable convergent systems, such as PDA handsets and smart phones.
The AAT1110 operates across an input range of 2.7 to 5.5V and output levels as low as 0.6 V. The device delivers up to 800 mA of current while maintaining a 27-μA no load quiescent current. It's available in either a fixed version with internal feedback or a programmable version with external feedback resistors.
The AAT1110's fast transient response meets the specs required to power the baseband chip set in GSM phones. A 1.4-MHz switching frequency helps reduce overall footprint by allowing the use of smaller external inductors and capacitors. Integrated soft-start capability eliminates any output voltage overshoot when the enable or input voltage is applied.
To protect the device from overload conditions, the AAT1110 limits peak current after a current limit has been sensed over a series of clock cycles. In addition, an over-temperature protection circuit disables switching once internal dissipation reaches a pre-set level. When over-current or over-temperature fault conditions are removed, the output voltage automatically recovers.
The device sells for $1.14 in 1000-piece quantities. For more information, visit the AnalogicTech Web site at www.analogictech.com.