DC-DC Boost Converter delivers 50 V from single Li-Ion cell.

Press Release Summary:



Suited for LCD or OLED display bias in battery-powered applications, Model AS1340 delivers 50 mA at 24 V or 30 mA at 36 V from single Li-Ion cell, and can provide adjustable output voltages from 2.7-50 V. Fixed switching frequency of 1 MHz minimizes PCB footprint by allowing use of tiny inductors and capacitors. Housed in 3 x 3 x 0.8 mm TFDN package, converter includes automatic power-save operation, 2% output voltage accuracy, and efficiency up to 90%.



Original Press Release:



austriamicrosystems New DC-DC Boost Converter Delivers 50v from A Single Li-Ion Cell



The AS1340 offers micro-power consumption with an efficiency of up to 90% while delivering high output voltages and currents especially suited for battery driven OLED or LCD displays

Unterpremstaetten, Austria (March 19, 2008) - austriamicrosystems (SWX: AMS), a leading global designer and manufacturer of high performance analog ICs for communications, industrial, medical and automotive applications, launched today the AS1340 high voltage boost regulator with up to 50V output voltage which is ideal for LCD or OLED display bias in battery powered applications.

The AS1340 delivers 50mA at 24V or 30mA at 36V from a single Li-Ion cell and can provide adjustable output voltages in the range of 2.7 to 50V. The AS1340 operates from a single 2.7 to 5.5V supply. Additionally the supply of the AS1340 can be split to allow a higher supply voltage, up to 50V, for the coil. The 1MHz fixed switching
frequency minimizes the PCB footprint by allowing the use of tiny, low profile inductors and capacitors. This constant frequency switching results in low, predictable output noise that can be easily filtered.

"LCD and OLED displays are used in almost every portable application on the market. Since these applications are battery driven, they need a high efficiency step-up converter able to deliver an output voltage of 12V or higher with a relatively moderate current of around 20mA," said Walter Moshammer, marketing director Standard Linear at austriamicrosystems." austriamicrosystems' AS1340 addresses this need offering a very high efficiency even at highest output voltages. Additionally the AS1340 is able to deliver enough current suitable for high voltage applications like phantom supplies for microphones."

The AS1340 also offers an automatic powersave operation which improves the efficiency at light loads. Furthermore, the micropower design reduces the operating supply current to only 30µA. This significant reduction of the power consumption of the AS1340 substantially increases battery life in the application. Moreover the AS1340 offers a shutdown mode requiring less than 1µA current combined with an output disconnect feature.

The AS1340 offers 2% output voltage accuracy and an available power-ok feature indicates if voltage is within 10% of regulation. Due to the variable supply concept and the optional output disconnect the AS1340 allows a very flexible design suitable for a broad range of applications. The part is ideally suited for powering a variety of different OLED or LCD displays in handheld devices or to provide the phantom supply for professional microphones where extended battery lifetime is essential.

The AS1340 is available in the compact 3x3x0.8mm TDFN 8-pin package and covers the industrial temperature range of -40°C to +85°C. For product specific information, to download data sheets or to request free samples from austriamicrosystems' online shop ICdirect, please visit http://www.austriamicrosystems.com/03products/products_detail/

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 1,100 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 further information
Press Contact
austriamicrosystems AG
Ulrike Anderwald
Marketing Communications Manager
Tel: +43 (0) 3136 500 5856
Fax: +43 (0) 3136 500 5420
press@austriamicrosystems.com
www.austriamicrosystems.com

Technical Contact
austriamicrosystems AG
Manfred Kogler
Marketing Manager Standard Linear
Tel: +43 (0) 3136 500 5274
Fax: +43 (0) 3136 500 5420
manfred.kogler@austriamicrosystems.com
www.austriamicrosystems.com

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