austriamicrosystems Introduces High Efficiency Inductorless DC-DC Boost Converter
austriamicrosystems introduced the AS1301, the first inductorless dc-dc boost converter in an upcoming portfolio. The AS1301 is capable of output currents as high as 50mA from a wide ranging input of 2.7 to 5.25V.
The new AS1301 offers low-noise constant frequency operation from light to higher loads. Its constant-frequency architecture provides both low input and low output ripple and its 1MHz switching frequency allows the use of extremely small external capacitors. Low external parts count of two �220nF flying caps and two �2.2µF bypass capacitors, combined with the small size of the low profile (0.6mm) WL-CSP-8 package, are said to make the AS1301 an extremely compact solution for space-constrained applications.
Providing a regulated output, the AS1301 is suitable for a variety of applications such as 2-3 AA cells alkaline/NiMH or 1 cell Li-Ion battery to 5V boost conversion in portable devices. With an excellent efficiency of up to 92%, the AS1301 offers lowest quiescent current and features a <5µA shutdown mode in which the output is fully disconnected from the input.
"Inductorless dc-dc converters like the AS1301 are often the ideal solution for applications requiring a combination of low power, simplicity and low cost," commented Walter Moshammer, Marketing Director Standard Linear at austriamicrosystems. "They require only capacitors and have no need for expensive inductors to generate the desired voltage which has the additional advantage that no electromagnetic emissions are influencing the application."
To prevent excessive inrush current during startup, the AS1301 offers a soft-start feature plus additional features like overload protection and thermal shutdown circuitry. The AS1301 is available in a TDFN (3x3x0.8mm) 10-pin or a WL-CSP 8-bump package and is suitable for operating environments ranging from -40 to +85°C.
