austriamicrosystems (SWX:AMS), a leading global designer and manufacturer of high performance analog ICs for communications, industrial, medical and automotive applications, launched 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 30uA. 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 1uA 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.
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).