DC to DC Power Supplies (Converters)
Boost Converter supplies up to 800 mA.
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Press Release Summary:
Model AS1326 synchronous, high efficiency, step-up DC/DC converter delivers 620 mA at 5.0 V from 2 AA cells or 470 mA at 3.3 V from single AA cell and can provide adjustable output voltages from 2.5-5 V or fixed at 3.3 V. Operating from voltage between 0.7-5 V, device offers adjustable soft-start and current limit. It also has 1 MHz fixed switching frequency and can synchronize switching frequency to external clock between 500 kHz and 1.2 MHz.
Original Press Release:
Austriamicrosystems Launches High Current Low Voltage 1 MHz Boost Converter while Delivering 96% Efficiency
New AS1326 high efficiency boost converter supplies up to 800mA and is able to work with input voltages
as low as 0.7V
Unterpremstaetten, Austria (19 July, 2007) - austriamicrosystems (SWX: AMS), a leading global designer and
manufacturer of analog integrated circuits (ICs) for communications, industrial, medical and automotive
applications, further expanded its DC-DC converter portfolio with the AS1326: a synchronous, high efficiency, stepup
DC-DC converter in a small TDFN 10-pin package. The AS1326 follows the AS1322 in doubling output currents
while providing a high efficiency of 96%.
The AS1326 delivers 620mA at 5.0V from two AA cells or 470mA at 3.3V from a single AA cell and can provide
adjustable output voltages in the range of 2.5 to 5V or fixed at 3.3V. Furthermore the AS1326 operates from a
voltage between 0.7 and 5V while offering adjustable soft-start and current limit.
"Many portable devices need small but high efficiency power converter solutions to extend the time between
battery replacement or recharge cycles. Additionally high output currents are required for power-hungry parts of
such devices," said Walter Moshammer, marketing director for standard linear at austriamicrosystems.
"austriamicrosystems AS1326 addresses this requirement by offering a high output current even when input
voltage drops as low as 0.7V. "
The 1MHz fixed switching frequency minimises 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.
Additionally the AS1326 can synchronise the switching frequency to an external clock between 500kHz and
1.2MHz offering the greatest possible flexibility.
Another feature of this device is the automatic powersave function which improves efficiency at light loads. This
significantly reduces the power consumption of the AS1326 and drastically increases battery life. During forced
PWM mode, the AS1326 maintains fixed frequency operation and is therefore ideal for applications with the need
for predictable and easily filtered output noise like mobile communications.
The high switching frequency and high efficiency combined with the small package size of 3x3x0.8mm of a 10-pin
TDFN makes the AS1326 ideally suited for a variety of compact portable applications such as GPS receivers,
mobile phones, digital still cameras, blood pressure meters and all other handheld devices where extended battery
operation combined with high currents are critical. The AS1326 covers the industrial temperature range of -40°C to
+85°C.
Product specific information can be downloaded from austriamicrosystems' website at
http://austriamicrosystems.com/03products/products_detail/AS1326/description_AS1326.htm
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 www.austriamicrosystems.com.
Electronic picture and block diagram are available on request or at
http://austriamicrosystems.com/07presscenter/presscenter_start.htm
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
