Compact, low profile step-down converter offers ideal solution for portable applications

Date Announced: 17 Apr 2007

Higher power density is a key benefit aiding engineers’ ongoing efforts to shrink their product footprint and thickness and thus build smaller micro hard disc drives, handsets, headsets, handheld instruments and other portable devices. By delivering 500mA in a tiny, 2 x 2 x 0.55mm package, AnalogicTech’s AAT1120 step-down converter allows designers to build smaller, thinner systems and still provide all the features and current found in larger footprint devices.

In its 8-pin STDFN package, the AAT1120 occupies just 4mm2 of PCB area and at just 0.55 mm tall, this latest addition to AnalogicTech’s extensive voltage regulation product line offers attractive space savings for space-constrained portable applications.

Designed for systems powered by a single-cell lithium-ion/polymer battery, 5V or 3.3V VBUS, the AAT1120 operates over a 2.7V to 5.5V input voltage range. Output voltage is adjustable from 0.6V to VIN and supports 100% duty cycle low dropout operation. A 96% efficiency level extends battery life. The converter also offers a low 30µA no load quiescent current. A 1.5MHz switching frequency permits the use of small external components while keeping switching losses low.

To ensure device integrity, the AAT1120 features over-temperature and current-limit protection. Soft-start control limits input surge current and eliminates output voltage overshoot.

The AAT1120 is specified across the -40 to 85 degrees C temperature range and is available in a Pb-free, 8-pin, 2 x 2mm STDFN package.

Phil Dewsbury, Advanced Analogic Technologies, Inc., Europe, 1210 Parkview, Theale, Berkshire, RG7 4TY Tel: +44 (0) 1189 657763


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