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DC/DC converter suits space constrained apps

Posted: 28 Apr 2006     Print Version  Bookmark and Share

Keywords:AAT1121  DC/DC converter  AnalogicTech 

Advanced Analogic Technologies Inc. (AnalogicTech) announced the AAT1121, a step-down DC/DC converter for space-constrained portable applications. The device offers 250mA output current at up to 96 per cent efficiency.

"Bluetooth headsets, ultra-thin digital still cameras and a growing number of other portable electronic devices need a step-down converter that delivers relatively low power with high efficiency in a very small footprint," noted Bill Weiss, product line director for AnalogicTech. "The AAT1121 is a suitable voltage conversion solution for these applications."

The AAT1121 operates over a 2.7V to 5.5V input range with an output as low as 0.6V. It maintains a 30μA no load quiescent current and uses a 1.5MHz switching frequency, which is said to reduce the size of external components. A high-DC gain error amplifier with internal compensation controls the output.

The product offers both current limit and over-temperature protection. Soft-start circuitry limits current surge at input and eliminates output voltage overshoot.

Specified over the -40°C to 85°C temperature range, the AAT1121 is available in an eight-pin, 2-by-2-by-0.85mm TDFN package. The device sells for Rs.34 (76 cents) in 1,000-piece quantities.

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