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Low-profile step-down converter delivers 550mA

Posted: 07 May 2007 ?? ?Print Version ?Bookmark and Share

Keywords:500mA step-down converter? high-density power converter? low-profile step-down converter?

AnalogicTech's low-profile, 500mA AAT1120 step-down converter

AnalogicTech has unveiled the AAT1120 step-down converter that delivers 500mA in a 2-by-2-by-0.55mm package, allowing designers to build smaller, thinner systems and still provide the features and current found in larger-footprint devices. Such high power density is a key benefit for engineers trying to shrink their product footprint and thickness and thus build smaller micro HDDs, handsets, headsets, handheld instruments and other portable devices.

In its 8-pin STDFN package, the AAT1120 occupies just 4mm? of PCB area. And with a profile of 0.55mm, this device offers attractive space savings for space-constrained portable applications.

Designed for systems powered by a single-cell Li-ion/polymer battery, 5V or 3.3V VBUS, the AAT1120 operates over a 2.7-5.5V input voltage range. Output voltage is adjustable from 0.6V to VIN and supports 100 percent duty cycle low dropout operation. A 96 percent efficiency level extends battery life. The converter also offers a low 30?A 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 -40C to 85C temperature range and is available in a Pb-free, 8-pin 2-by-2mm STDFN package.

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