DC-DC Buck Converter supplies 600 mA for low output voltages.
November 20, 2008 -
AS1324 delivers up to 600 mA from input voltage range of 2.7-5.5 V, making device suited for single Li-Ion cell or triple AA cell applications. Fixed output voltage versions 1.2, 1.5, and 1.8 of AS1324 require no external voltage dividers, reducing board space requirements, while adjustable variant allows externally set output voltage in 0.6 V to VIN range. Cconstant 1.5 MHz frequency switching results in low, predictable output noise that can be filtered.
austriamicrosystems' New AS1324 DC-DC Buck Converter Supplies 600mA for Low Output Voltages
The AS1324 offers 96% efficiency together with low quiescent current while delivering output voltages down to 0.6V.
Unterpremstaetten, Austria (October 31, 2008) - austriamicrosystems (SWX: AMS), a leading global designer and
manufacturer of high performance analog ICs for communications, industrial, medical and automotive applications,
introduces AS1324, a step down regulator optimized for low output voltages in battery powered applications.
The AS1324 delivers up to 600mA from an input voltage range of 2.7 to 5.5V which makes the device ideal for
single Li-Ion cell or triple AA cell applications. The 100% duty cycle capability for low dropout allows maximum
energy to be extracted from the battery. The fixed output voltage versions 1.2V, 1.5V and 1.8V of AS1324 require
no external voltage dividers reducing board space requirements. The adjustable variant allows an externally set
output voltage in the range of 0.6V to VIN.
austriamicrosystems' AS1324 is designed to save space and increase efficiency in battery powered applications.
The 1.5MHz fixed switching frequency minimizes 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.
Furthermore the AS1324 offers high output voltage accuracy as well as a low output voltage ripple.
Additionally the integrated automatic power save mode increases efficiency in light load conditions, consuming only
30µA of quiescent current. The reduced power consumption substantially increases battery life in many
applications. Moreover, the AS1324 offers a 100nA typical shutdown mode combined with an output disconnect
feature.
"Many portable applications powered by a single lithium-ion battery cell need low voltages far below the battery
supply range to power modern microprocessors and other low power ICs," said Walter Moshammer, Marketing
Director Standard Linear at austriamicrosystems. " The AS1324 provides the low voltage required and additionally
offers high efficiency to support low power designs."
The AS1324 is available in a TSOT23 5-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 www.austriamicrosystems.com/DC...
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: AMS).
For further information
Technical Contact
austriamicrosystems AG
Rene Wutte
Marketing Manager Standard Linear
Tel: +43 (0) 3136 500 5653
Fax: +43 (0) 3136 500 5420
rene.wutte@austriamicrosystems.com www.austriamicrosystems.com
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