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Charge pump uses high fixed switching frequency, saves space

Sunnyvale, CA — Advanced Analogic Technologies, Inc. (AnalogicTech), a developer of innovative power management solutions, introduces the AAT3119 fixed frequency, a high efficiency charge pump. Optimized for battery-powered portable applications, the device can be used with ultra-small 1 microfarad capacitors at VIN and VOUT .

Representing the company's next generation of regulated voltage doublers, the AAT3119 produces current levels up to 150mA and delivers 300mA of pulsed current. The device eliminates the need for an inductor, requires only three small external capacitors, and is available in a compact 8-pin SC70JW package — conserving valuable board space. Operating from a 2.7V to 5.5V input range, the AAT3119 is ideal for RGB and white LED backlighting applications in cellular phones, MP3 players, PDAs, and other hand-held devices.

“The AAT3119 delivers a fixed switching frequency that does not change with output current,” explains Erik Ogren, Product Marketing Manager for AnalogicTech. “This is a very important design consideration for noise-sensitive wireless applications like cell phones, where pinpointing a specific switching frequency simplifies the system design.”

The AAT3119 offers significantly higher operating frequencies and lower output ripple than its predecessors. A thermal management system protects the IC during any short-circuit condition at the output pin by sensing die temperature and shutting down the device. Integrated soft-start circuitry prevents excessive in-rush current during startup. A low current shutdown feature reduces quiescent current to less than 1μA.

Rated over the -40°C to 85°C industrial temperature range, samples and production quantities of the AAT3119 are available now. Parts are offered in a compact 8-pin SC70JW package and sell for $1.26 (based on 1,000-unit quantities).

For more information, please visit the AnalogicTech website: www.analogictech.com.
Advanced Analogic Technologies, Inc. Tel: 408 737 4600

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