Step-Down Switching Controller targets DDR memory power architectures.April 15, 2010 -
Supporting memory reference voltage, XRP6142 also provides memory buffer supply or terminating voltage supply. Operating from 3.3-5 V rails, it supports conversions down to 0.5 V from input voltage as low as 1 V, and time control scheme allows for constant switching frequency operations, from 500 kHz to 1 MHz, over entire input voltage range. Housed in 16-pin, halogen-free QFN package, RoHS-compliant device has 2 W integrated gate drivers that enable point-of-load designs in excess of 15 A.
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Original Press release
Exar Corp.
48720 Kato Road
Fremont, CA, 94538
USA
Exar Announces New High Power Controller for Latest Generation of DDR Memories
The XRP6142 Supports Down Conversion Point-of-loads in Excess of 15 Amps
FREMONT, Calif., -- Exar Corporation (NASDAQ:EXAR) unveiled today the XRP6142, the latest addition to its line of market proven low voltage step-down controllers specifically targeted at DDR memory power architectures. Supporting the memory reference voltage V(TTREF), the XRP6142 also provides either the memory buffer supply, V(DDQ), or the terminating voltage supply V(TT) for an optimized point-of-load solution for latest generation DDR memory requirements.
"DDR memories have become the prevalent technology for memory based systems," said Eric Pittana, director of marketing, Power Product Line. "The XRP6142 is easy to design in and provides a compact and highly efficient power solution for the latest DDR memory generation. By itself or combined with our SP2996 (DDR Bus Termination Regulator), it's a full turn-key solution for powering DDR based systems."
Architected with a constant on-time control scheme, the XRP6142 controller provides a very fast transient response capable of supporting the most stringent bus load and general load switching. Operating at virtually a constant frequency over the whole input voltage range, it simplifies electromagnetic interference (EMI) filtering designs. Requiring no external components for compensation, the XRP6142 provides a compact solution for space constrained high power supply and generic point-of-loads.
Key Product Features
The XRP6142 is a synchronous step down switching controller optimized to operate from standard 3.3V and 5V rails. It supports conversions down to 0.5V from an input voltage as low as 1V and can achieve up to 96% efficiency. Its constant on-time control scheme allows for constant switching frequency operations, from 500 kHz to 1MHz, over the whole input voltage range, fast load transient response while three selectable on-time options (0.5us, 1us and 2us) further optimize the solution footprint and performance. Powerful 2 Ohm integrated gate drivers enable point-of-load designs in excess of 15Amps. The XRP6142 requires no external compensation components and provides an integrated soft-start and precision enable function to implement complex sequencing protocols.
Power Management Products
Highly reliable, accurate, power management is a critical part of any technology system. Exar has a broad array of high-performance and industry-proven power management solutions including handset and lighting controls, power conversion, and standard linear devices.
Prices, Packages, Availability and Additional Information
The XRP6142 is available now in volume quantities and offered in a RoHS compliant, halogen free 16-pin QFN package. Pricing starts at $0.89 for 1K units.
Additional information on this product can be found at
http://www.exar.com/Common/Content/Pr....
Additional information on Exar's other step down controllers can be found at http://www.exar.com/Common/Content/Pr....
About Exar
Exar Corporation delivers highly differentiated silicon, software and subsystem solutions for data communication, storage, consumer and industrial applications. For nearly 40 years, Exar's comprehensive knowledge of end-user markets along with the underlying analog, mixed signal and digital technology has enabled innovative solutions that meet the needs of the evolving connected world. Exar's product portfolio includes power management and interface components, communications products, storage optimization solutions, network security and applied service processors. Exar has locations worldwide providing real-time customer support to drive rapid product development. For more information about Exar, visit: www.exar.com.
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