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Power solution cuts product footprint, design complexity

Posted: 15 Sep 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Advanced Analogic Technologies? AnalogicTech? AAT2554? power management IC?

AnalogicTech's AAT2554 power management IC

Advanced Analogic Technologies Inc. (AnalogicTech) has announced the AAT2554, said to be the industry's first power management IC to combine a 500mA battery charger, 250mA step-down converter and 300mA low dropout (LDO) linear regulator in a 3-by-4mm package.

Part of the company's rapidly expanding SystemPower product family, this new multifunction device promises designers of ultralow-power products a highly compact power management solution that reduces product footprint and design complexity.

All three functions are optimized for ultralow-power applications using a single-cell Li-ion battery as a power source. The battery charger operates across an input voltage of 4-6.5V, while the step-down converter and LDO operate across a 2.7V to 5.5V input range. As a complete constant current/constant voltage linear device, the battery charger delivers a programmable constant current up to 500mA. It features reverse blocking protection and high current accuracy, as well as voltage regulation, charge status and charge termination functions.

Using a 1.5MHz switching frequency, the step-down converter also helps minimize system footprint by supporting the use of very small external components. The converter functions using an inductor of less than 1mm in height, while delivering 250mA output current with efficiency as high as 96 percent, the company said.

The LDO integrated into the AAT2554 can supply up to 300mA output current. It features fast line and load transient response and a low 70?A quiescent current. To ensure safe device operation, the device also features short-circuit, over-temperature and current limit protection circuits.

Specified over the -40C to 85C temperature range, the AAT2554 is available now in a Pb-free, 16-pin, 3-by-4mm TDFN package. The device sells for $2.14 each in 1,000-unit quantities.

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