AAT1120 Compact, low profile step-down converter offers Ideal solution for portable applications

Date: 18 Apr 2007

Synopsis: 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

For more information please email us at aati@broadband.uk.com