Single-Cell Boost Converter operates with less than 1.6 µA.

Press Release Summary:

Supplied in 5-pin TSOT23 package specified over -40 to +85°C range, AS1323 step-up dc/dc converter delivers 100 mA output current from single AA battery, with possible fixed output voltages of 2.7, 3.0, and 3.3 V operating from input voltage from 0.75-2 V. Integrated low-voltage boot circuit ensures start-up, even with high load currents. Minimum start-up voltage, 0.95 V, is independent of load current, and internal synchronous rectification eliminates need for external diode.

Original Press Release:

austriamicrosystems Unveils Single-Cell Boost Converter Operating with Less than 1.6µA

New AS1323 ultra-low quiescent current step-up converter offers longest running times for low-power products

Unterpremstaetten, Austria (9 July, 2007) - austriamicrosystems (SWX: AMS), a leading global designer and manufacturer of analog integrated circuits (ICs) for communications, industrial, medical and automotive applications, introduces the AS1323, a ultra-low quiescent current, high efficiency, step-up DC-DC converter which comes in a small 5-pin TSOT package. The AS1323 delivers 100mA output current from a single AA battery with possible fixed output voltages of 2.7V, 3.0V and 3.3V, operating from an input voltage between 0.75 and 2V.

The AS1323 offers an integrated unique low-voltage boot circuit which ensures start-up even with high load currents. The minimum start-up voltage of 0.95V is independent of the load current. With only 1.6µA quiescent current and a shutdown mode drawing less than 200nA current austriamicrosystems demonstrates continued leadership in power consumption reduction. Furthermore, during shutdown the battery is completely disconnected from the output.

"Many single cell devices such as medical applications are used only a few times a day for measurements. For those applications a long period of minimal power consumption and a short period of high current consumption is typical," said Walter Moshammer, marketing director for standard linear at austriamicrosystems. "austriamicrosystems' AS1323 addresses this requirement with its extremely low quiescent current of 1.6µA and high efficiencies at lowest output currents. Capable to drive high output currents even if the input voltage is very low, the AS1323 is a perfect match for such single cell applications."

Another feature of this device is an internal synchronous rectification which ensures high efficiency and eliminates the need for an external diode, saving cost and size. The AS1323 has been designed to operate with physically small external components.

The AS1323 is available in a 5-pin TSOT23 package suitable for the industrial temperature range of -40°C to +85°C. Product specific information can be downloaded from austriamicrosystems' website at

About austriamicrosystems
austriamicrosystems is a leading designer and manufacturer of high performance analog ICs, combining more than 25 years of analog design capabilities and system know-how with its own state-of-the-art manufacturing and test facilities. austriamicrosystems leverages its expertise in low power and high accuracy to provide industry-leading customized and standard analog products. Operating worldwide with more than 1,000 employees, austriamicrosystems focuses on the areas of power management, sensors & sensor interfaces, portable audio and car access in its markets Communications, Industry & Medical and Automotive, complemented by its Full Service Foundry activities. austriamicrosystems is listed on the SWX Swiss Exchange in Zurich (ticker symbol: AMS).

For more information, please visit the web site at

Technical Contact
austriamicrosystems AG
Manfred Kogler
Marketing Manager Standard Linear
Tel: +43 (0) 3136 500 5274
Fax: +43 (0) 3136 500 5420

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