DC to DC Power Supplies (Converters)
DC-DC Boost Converter delivers 42 V from 0.9 V input.
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Press Release Summary:
Optimized for biasing of photodiodes, LCD, or PMOLED display powered from single cell batteries, AS1344 operates from single 0.9-3.6 V supply and provides adjustable output of 5.5-42 V, with 1 MHz fixed switching frequency. Automatic power save operation and micro-power design reduce operating supply current to 22 µA. Other features include adjustable soft-start, 1 µA shutdown mode with output disconnect, 3 x 3 x 0.8 mm TDFN 10-pin package, and operating temperature of -40 to +85°C.
Original Press Release:
austriamicrosystems New DC-DC Boost Converter Delivers 42V from a 0.9 Volt Input
The AS1344 offers micro-power consumption with high efficiency combined with a soft-start feature and output disconnect during shutdown
Unterpremstaetten, Austria (July 22, 2009) - austriamicrosystems (SIX:AMS), a leading global designer and manufacturer of high performance analog ICs for communications, industrial, medical and automotive applications, have today launched the AS1344 high voltage DC-DC boost converter optimized for biasing of Photodiodes, LCD or PMOLED display powered from single cell batteries. At 15V output voltage the AS1344 delivers 120mA from a 3V or 28mA from a 1.5V input voltage. 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."
The AS1344 also offers an automatic power save operation which improves the efficiency at light loads. Furthermore, the micro-power design reduces the operating supply current to only 22µA. This significant reduction of power consumption substantially increases battery life in the application.
austriamicrosystems' AS1344 offers both a 1µA shutdown mode, combined with an output disconnect feature. This capability 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.
The AS1344 offers 2% output voltage accuracy and a power-ok feature indicates when voltage is within 10% of regulation. The part is ideally suited for powering a variety of different PMOLED, e-ink or LCD displays in handheld devices, or other applications such as microphones, photodiodes or LED strings requiring high voltages.
The AS1344 is available in the compact 3 x 3x 0.8mm TDFN 10-pin package and covers the industrial temperature range of -40°C to +85°C. For product specific information, download data sheets or request free samples from austriamicrosystems' online shop ICdirect, please visit http://www.austriamicrosystems.com/DC-DC-Step-up-Converter/AS1344.
About austriamicrosystems
austriamicrosystems is a leading designer and manufacturer of high performance analog ICs, combining more than 27 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 and mobile infotainment in its markets Communications, Industry & Medical and Automotive, complemented by its Full Service Foundry activities. austriamicrosystems is listed on the SIX Swiss Exchange in Zurich (ticker: AMS).
