Step-Down Converter handles transients from 10-500 mA.October 10, 2008 -
Operating at 2.5 MHz switching frequency, AAT1130 monolithic step-down converter keeps output voltage ripple low while supporting use of 1 µH chip-scale inductors. It operates across 2.7-5.5 V input range and quiescent current of 60 µA and delivers output from 0.6-1.8 V. Programmed output voltage is 1.2 V and unit maintains output accuracy to within ±5%. Operating from -40 to +85°C, it features internal soft start and over-temperature and current limit protection circuits.
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Original Press release
Advanced Analogic Technologies Inc.
830 E. Arques Ave.
Sunnyvale, CA, 94085
USA
AnalogicTech's High Performance Step-Down Converter Delivers up to 2X Faster Transient Response
Innovative Architecture Reduces System Footprint by Enabling Use of Compact, Low Profile Inductors
SANTA CLARA, Calif., Sept. 30 / / - Advanced Analogic Technologies Inc. (AnalogicTech(TM)) (NASDAQ:AATI), a developer of power management integrated circuits for communications, computing and consumer electronics devices, announced today the AAT1130, a new high performance 500mA monolithic step-down converter. Using an innovative pseudo fixed-frequency architecture, the new converter offers transient response at least 2X faster than a traditional 500mA, 2MHz, PWM-mode buck converter while supporting the use of extremely small, 1 µH chip-scale inductors.
"As network data rates climb and mobile products such as smart phones add a dizzying array of complex applications, transient response becomes a major obstacle to high performance," says CJ Zhang, Product Line VP at AnalogicTech. "By combining a unique architecture specifically tuned for fast transient response with a high switching frequency, the AAT1130 allows designers to both support rising performance requirements and reduce solution size by using compact, low profile inductors."
Ultra-fast Transient Response
Designed for mobile electronics applications, the new converter operates across a 2.7V to 5.5V input range and low quiescent current of 60uA and delivers an output between 0.6V and 1.8V. The AAT1130 delivers up to 500 mA of maximum continuous output current. Internal MOSFET switches allow the converter to support efficiency rates up to 92% over a wide load range.
The AAT1130's unique architecture operates at a fixed switching frequency in steady-state operation while allowing the control circuit to react almost instantly to transients. With a programmed output voltage of 1.2V, the AAT1130 can handle severe load transients from 10mA to 500mA and still maintain output voltage accuracy within ±5%.
Operating at a high 2.5MHz switching frequency, the new step-down converter keeps output voltage ripple low while enabling the use of small, 1mm high 0603 inductors.
The new device is available with either fixed or adjustable output regulation voltage options. In the adjustable configuration, output voltage is set with an external resistor voltage divider circuit.
To manage output voltage overshoot, the AAT1130 features internal soft start. The IC also includes over-temperature and current limit protection circuits.
Price and Availability
The AAT1130 is qualified across the -40 degrees C to +85 degrees C temperature range. It comes in a 2 x 2.2mm, 10-pin SC70JW package. The IC sells for $0.87 in 1K quantities.
About AnalogicTech
Advanced Analogic Technologies, Inc. (AnalogicTech) is a supplier of Total Power Management(TM) semiconductor solutions for mobile consumer electronic devices, such as wireless handsets, notebook and tablet computers, smartphones, digital cameras, wireless LAN, and personal media 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 also develops and licenses device, process, package, and application-related technology. AnalogicTech is headquartered in Santa Clara, California and Macau, S.A.R., with offices in China (Beijing, Shanghai and Shenzhen), Hong Kong, Taiwan, Japan, South Korea, Sweden, France and United Kingdom, as well as a worldwide network of sales representatives and distributors. The company is listed on the NASDAQ exchange under the ticker symbol AATI. For more information, please visit the AnalogicTech website: http://www.analogictech.com/. (AnalogicTech - G)
AnalogicTech and the AnalogicTech logo are trademarks of Advanced Analogic Technologies Incorporated. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders.
Source: Advanced Analogic Technologies, Inc.
CONTACT: Headquarters, Karolien Cools-Wittry of Advanced Analogic Technologies, Inc., +1-408-737-4600, karoliencw@analogictech.com
Web site: http://www.analogictech.com/
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