AnalogicTech Introduces Small Step-Down dc/dc Converter
Advanced Analogic Technologies Inc. (AnalogicTech) (Nasdaq: AATI), announced the AAT1110, an 800mA step-down dc/dc converter in a tiny 2.0x2.1mm SC70JW package. Optimized for fast transient response, this new member of AnalogicTech's rapidly growing voltage converter family is well-suited for powering up heavy loads in high performance, ultra-portable convergent systems, such as PDA handsets and smart phones. "Designers of cellular phones, digital cameras, and other small portable devices continue to expand their feature set and, in the process, move to higher performance processors that demand increased levels of power," said Bill Weiss, Product Line Director for AnalogicTech. "By mounting an 800mA converter in a tiny SC70JW package, the AAT1110 can deliver the higher current these new designs require and still enable the smallest solution size possible."
The AAT1110 operates across an input range of 2.7V to 5.5V and output levels as low as 0.6V. The device delivers up to 800mA of current while maintaining a low 27µA no load quiescent current. It is 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 specifications required to power the baseband chipset in GSM phones. A high 1.4MHz switching frequency helps reduce solution footprint by allowing the use of extremely small 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 AAT1110 is specified over the -40ºC to +85ºC temperature range.
The device is available in a Pb-free, 8-pin, 2.0x2.1mm SC70JW package and sells for $1.14 in 1000-piece quantities.
