austriamicrosystems Announces Two step-down DC-DC Switching Charger ICs for Single Cell Li-Ion Batteries in Mobile Devices


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austriamicrosystems (SIX: AMS), a leading global designer and manufacturer of high-performance analog ICs, has announced two new battery charger ICs for Li-Ion batteries in mobile devices. The AS3610/11 step-down DC-DCs offer fast and highly efficient charging of Li-Ion batteries in mobile devices with up to 1.25 A output current. The ICs include numerous safety and protection features, internal current measurement, and USB Host/OTG (on the go) boost mode operation. The AS3610 DC-DC provides an I²C interface for external control and the AS3611 operates independently. The performance and features of the AS3610/11 make the charger ICs very well suited for applications that are powered by one Li-Ion battery. Such applications include high-end blood glucose meters, remote controls, GPS outdoor navigation or tracking equipment, mobile phones, e-dictionaries and e-book readers. The AS3610/11 switching charger ICs were designed with inputs from the handset and portable markets to use a high efficiency switch mode charger with minimum ripple. Implementation is simplified with most options and features controlled by pin strapping or OTP (one time programmable) memory. These features include current limit set, charging current, OTG boost, and more. The AS3610 step-down DC-DC also supports 900mA input current limitation for USB 3.0. "Modern mobile devices incorporate more features while demanding longer battery life", said Peter Kammerlander, Product Manager at austriamicrosystems. "The mobile industry asked for higher efficiency DC-DC chargers, with numerous options. These options enable the customer to re-use one design across a family of end products with minimal customization to support each model. The AS3610/11 features high current, low heat dissipation and all necessary safety features to safely give the end user the shortest possible charging time. Despite all these features, only a minimal number of external components are needed." Other features of austriamicrosystems' AS3610/11 step-down DC-DCs include: 22 V over-voltage protection; reverse polarity protection; chip and battery temperature supervision, and charger time-out supervision. The AS3610/11 is available in a small 3x3 mm MLPD14 package, and operates from a supply of 2.7 V to 5.5 V over a temperature range of -40 °C to 85 °C. A WL-CSP package option is available for PCB space-critical applications. Price and availability The AS3610/11 DC-DCs are available now and are priced at $1.20 in 1000-piece quantities. A demo board is also available to reduce development time. For more information on austriamicrosystems' AS3610/11 and the demo board, please visit