Regulators raise current and cut switching time

New step-down voltage regulators aim to help designers meet rising performance requirements while reducing footprint and component count.

Advanced Analogic Technologies (AnalogicTech) has announced the AAT2506 and AAT2511 step-down voltage regulators.

The devices' high current capability, rapid turn-on time, and high level of integration will help designers meet rising performance requirements while reducing footprint and component count.

The continual push to integrate complex new features and functions in each successive product generation has driven portable system designers to demand higher current levels and more stringent performance requirements.

By delivering up to 600mA of output current and a fast 100us turn-on time with up to 97% efficiency, the devices extend AnalogicTech's line of DC/DC step-down convertors to a wider range of chipsets in cellphones, MP3 players, and other popular portable electronic devices.

The AAT2506 combines a 600mA step-down convertor with a 300mA low-dropout linear regulator (LDO), whereas the AAT2511 integrates two 600mA step-down convertors.

The step-down DC/DC convertor in the AAT2506 delivers 600mA while maintaining an exceptionally high 97% efficiency.

It also features a low 25uA no load quiescent current.

A 1MHz switching frequency minimises the size of external components and reduces switching losses.

The device's LDO operates off an independent input and offers fast transient response and excellent power supply rejection ratio.

The two step-down convertors in the AAT2511 also maximise efficiency at light load with a low 25uA quiescent current on each channel.

As with the AAT2506, a 1MHz switching frequency minimises external component count and size.

Output voltage ranges from 0.6V to the maximum applied input voltage.

It can be either fixed or externally adjustable.

Both devices are rated over the -40 to +85C temperature range and are immediately available in Pb-free, 12-pin TDFN33 packages.

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