Advanced Analogic Technologies has announced the first in a family of switching regulators designed for low-noise operation. Based on an innovative new (patent-pending) architecture, the AAT2120 and AAT2158 synchronous step-down converters deliver low spectral noise and output ripple.
Power efficiency for the AAT2120 and AAT2158 reach up to 96% and 95% respectively. Moreover, by operating at high switching frequencies, both devices minimise the size of external components. The AAT2120 supplies up to 500 mA output current, while the AAT2158 delivers up to 1,5 A output for applications requiring higher levels of power. Both devices operate from an input range of 2,7 to 5,5 V d.c. and support output voltages as low as 0,6 V.
For protection purposes, both step-down converters offer internal soft-start, over-temperature and current limit protection. They also extend system runtime by adding 100% duty cycle low-dropout operation. Qualified across the -40°C to +85°C temperature range, the AAT2120 is available in a Pb-free, 8-pin 2 x 2 mm² STDFN package. The AAT2158 is also qualified across the -40°C to +85°C temperature range and comes in a Pb-free, 16-pin 3 x 3 mm2 QFN package.
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