AnalogicTech : Step-down converter meets rising power needs

Whether building new Portable Navigation Devices (PNDs), Portable Media Players (PMPs) or high-end handsets, today’s system designers must constantly add new features and functions that require higher levels of processing power and more current. By delivering up to 2A at high efficiency in a small solution, AnalogicTech’s AAT1153 step-down converter serves as a key building block in the continual evolution of higher performance yet compact handheld systems.

The AAT1153 is a 1.2MHz constant frequency, current mode step-down converter capable of delivering up to 2A of output current. Available in a compact, 3x3mm TDFN package, this highly efficient synchronous device helps portable system designers meet rising power requirements and still deliver a small, power-efficient solution.

The AAT1153 supplies up to 2A output current from a 2.5V to 5.5V input. Output voltage can range from 0.6V to VIN. Current mode operation offers excellent line and load transient response.

The step-down converter extends battery life by running at efficiency levels as high as 95% and can achieve 90% efficiency at its full rated 2A load. It also uses low RDS (ON) internal switches that can run at 100% duty-cycle for low-dropout operation. In addition, light load operation minimises output ripple for noise sensitive applications.

Using a high 1.2MHz constant switching frequency, the AAT1153 allows designers to use small external components including lower cost ceramic capacitors. The internal slope compensation setting helps minimise system footprint by allowing the designer to use smaller inductor values.

The AAT1153 offers both short-circuit and over-temperature protection. Soft start circuitry limits current surge at input and eliminates output voltage overshoot. It also offers a low shutdown current of less than 1microA.
Qualified across the -40 C to +85 C temperature range, the AAT1153 is available in a Pb-free, 10-lead 3x3mm TDFN package.

For further information and reader enquiries:

Phil Dewsbury, Advanced Analogic Technologies, Inc., Europe, Liberty House, The Enterprise Centre, Newgreenham Park, Newbury, RG19 6HW
Tel: +44 (0) 1635 817260
Fax: +44 (0) 1635 817261
E-mail: Web:

Advanced Analogic Technologies Incorporated (AnalogicTech) is a supplier of power management semiconductors for mobile consumer electronic devices, such as wireless handsets, notebook and tablet computers, smartphones, digital cameras, and digital audio players. The company focuses its design and marketing efforts on the application-specific power management needs of consumer, communications, and computing applications in these rapidly evolving devices. AnalogicTech is headquartered in Sunnyvale, California, with offices in Beijing, Hong Kong, Japan, Shanghai, Shenzhen, South Korea, Sweden, UK, France, and Taiwan, as well as a worldwide network of sales representatives and distributors. For more information, please visit the AnalogicTech website: .

Note: The above text is the public part of the press release obtained from the manufacturer (with minor modifications). EETimes Europe cannot be held responsible for the claims and statements made by the manufacturer. The text is intended as a supplement to the new product presentations in EETimes Europe magazine.

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