Date: 22/07/2009

Austriamicrosystems new DC-DC boost converter with 42V from a 0.9 Volt input

Austria microsystems introduced new AS1344 high voltage DC-DC boost converter optimized for biasing of Photodiodes, LCD or PMOLED display powered from single cell batteries.

The AS1344 operates from a single 0.9 to 3.6V supply and provides adjustable output voltages in the range of 5.5 to 42V. 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.

"Battery powered applications with PMOLED, or e-ink displays, need a high efficiency step-up converter which is able to deliver an output voltage of approximately 15V at a relatively moderate current," said Bruce Ulrich, Marketing Director Standard Linear at austriamicrosystems. "The AS1344 addresses this need offering very high efficiency even at high output voltages. Additionally, single or dual cell applications are also supported."

AS1344 offers an automatic power save operation and a 1uA shutdown mode, combined with an output disconnect feature and reduces PCB space and BOM in applications such as PMOLED or e-ink displays, where disconnection is required for optimal operation and reduced power consumption. With an adjustable soft-start feature the AS1344 enables power up of applications even with drained batteries by limiting the input current during start-up.

AS1344 is ideally suited for powering a variety of different PMOLED, e-ink or LCD displays in handheld devices

Other applications:

Microphones,
Photodiodes or LED strings requiring high voltages.

Package: compact 3 x 3x 0.8mm TDFN 10-pin package.

Operational temperature range: -40°C to +85°C.
For more details visit http://www.austriamicrosystems.com/DC-DC-Step-up-Converter/AS1344