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Arques buck controller with two LDOs

Posted: 12 Dec 2003 ?? ?Print Version ?Bookmark and Share

Keywords:arques technology? aq9220? voltage controller? ldo controller?

Arques Technology has introduced the AQ9220 3-output voltage controller that provides a dual-phase synchronous buck switcher plus two LDO controllers.

The dual-phase synchronous buck controller features a 5-bit VID interface with adjustable step and offset voltages. Power loss and noise are minimized by operating the PWMs 180 out-of-phase, and constant on-time regulation simplifies loop compensation and provides good transient response.

Designed for a wide range of applications such as AGP 3D graphics cards, personal computers, and VRM supplies, the AQ9220 features two LDO controllers. One is capable of driving an external N-channel MOSFET for VDDQ, the other can drive two external N-channel MOSFETs to achieve current sourcing and sinking required for the VTT termination voltage of DDR memory.

Offered in either a MLP-40 or LQFP-44 package, the AQ9220 is priced at $1.20 each in 1,000-piece quantities. Evaluation boards available.





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