Product category:
Power Supply ICs and Controllers
News Release from: Advanced Analogic Technologies | Subject: AAT1121
Edited by the Electronicstalk Editorial
Team on 26 April 2006
Step-down convertor slims for portable
designs
The AAT1121 is a step-down convertor for extremely space-constrained portable applications.
Advanced Analogic Technologies has announced the AAT1121, a step-down convertor for extremely space-constrained portable applications Mounted in a tiny TDFN package, the device offers 250mA output current at up to 96% efficiency
This article was originally published on Electronicstalk on 19 Sep 2008 at 8.00am (UK)
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Bluetooth headsets, ultrathin digital stills cameras and a growing number of other portable electronic devices need a step-down convertor that delivers relatively low power with high efficiency in a very small footprint.
The AAT1121 is an ideal voltage conversion solution for these applications.
In a tiny 2 x 2 x 0.85mm package using very small external components, the AAT1121 supplies the right amount of current with high efficiency over the entire load range.
The AAT1121 operates over a 2.7 to 5.5V input range with an output as low as 0.6V.
With efficiency as high as 96%, the AAT1121 maintains a low 30uA no load quiescent current.
The device also uses a 1.5MHz switching frequency that reduces the size of external components.
A high-DC-gain error amplifier with internal compensation controls the output and provides excellent transient response and load regulation.
The AAT1121 offers both current limit and overtemperature protection.
Soft-start circuitry limits current surge at input and eliminates output voltage overshoot.
Specified over the -40 to +85C temperature range, the AAT1121 is available in an 8-pin, 2 x 2 x 0.85mm TDFN package.
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