AnalogicTech has introduced two extremely small 1 MHz step-down converters.
Even though saving space is a top priority in portable systems, designers often have to compromise by using a large package when they specify a step-down converter with high output current levels. By offering 400 mA and 600 mA in a tiny, space-saving 2 x 2,1 mm SC70JW-8 package, the converters offer designers new options for reducing device footprint, says the company.
AnalogicTech's AAT1123 and AAT1143 supply 600 mA and 400 mA max output current respectively, while maintaining a low, 25 μA no load quiescent current. Both devices support an input voltage range of 2,7 V to 5,5 V and output as low as 0,6 V.
The devices are available in either a fixed version with internal feedback or a programmable version with an external feedback resistor. Their 1 MHz switching frequency helps minimise external component size while keeping switching losses to a minimum. The AAT1123 also features a fast 100 μs (typical) turn-on time.
Efficiency levels for the AAT1123 and AAT1143 range up to 97% and 95% respectively. The step-down converters also feature soft start, over-temperature and current limit protection, 100% duty cycle low-dropout operation, and 0,1 μA shutdown current. They are rated for -40 to +85°C.
For more information contact Stephen Delport, Hi-Q Electronics, +27 (0)21 595 1307, stephen@hi-q.co.za
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