Convertor IC boosts system power density

Compact step-down convertor allows designers to build smaller, thinner systems and still provide all the features and current found in larger footprint devices.

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 convertor 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 0.55mm 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, 5 or 3.3V bus voltage, the AAT1120 operates over a 2.7 to 5.5V input voltage range.

Output voltage is adjustable from 0.6V to the input level and supports 100% duty cycle low dropout operation.

A 96% efficiency level extends battery life.

The convertor also offers a low 30uA 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 overtemperature and current-limit protection.

Soft-start control limits input surge current and eliminates output voltage overshoot.

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

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