Exar Announces Single and Dual Channel 1 Amp Step-Down Converters Achieving Over 90% Efficiency Across the Load Range

FREMONT, Calif., Sept. 20 /PRNewswire/ -- Exar Corporation (Nasdaq: EXAR) unveiled today the XRP6658 and XRP6668, respectively a single and dual channel step-down converter capable of delivering up to 1 Amp output current per channel. These devices represent the latest addition to Exar's line of market proven low voltage step-down regulators.

"Supporting a 2.5V to 5.5V input voltage range traditional of Lithium-Ion battery operated portable applications, the XRP6658 and XRP6668 are capable of achieving conversion efficiencies as high as 97% and better than 90% with load currents from below 1mA to the full 1 Amp," said Eric Pittana, director of marketing, Power Product Line. "The XRP6658 and XRP6668 pack in a small form factor one and two highly efficient and performing regulators that need minimal external components to operate. With quiescent currents rated at 15MuA and 30MuA, these devices are amongst the best-in-class converters."

Key Product Features

Both the XRP6658 (single channel) and the XRP6668 (dual channel) are synchronous current mode PWM step-down (buck) converters capable of delivering up to 1 Amp of current per channel and optimized for portable battery-operated operations.

Based on a current mode 1.5MHz constant frequency PWM control scheme, the devices reduce the overall component count and solution footprint as well as provide a low output voltage ripple and excellent line and load regulation. Both devices also implement a PFM mode to improve light load efficiency as well as a 100% duty cycle LDO mode. Output voltage is adjustable to as low as 0.6V with better than 3% accuracy while a low quiescent current supports the most stringent battery operation conditions. Built-in over temperature and under voltage lock-out protections insure safe operations under abnormal operating conditions.

Exar also extended its line of precision voltage references with the addition of the XRP431L. This 0.5% highly precise voltage reference circuit provides a 1.24V to 18V adjustable reference. The XRP431L is thermally stable at 20ppm/C (degrees) temperature coefficient and only requires a mere 100MuA to operate while supporting up to 100mA.

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 XRP6658 is available in volume quantities and offered in a RoHS compliant, "green" halogen free 5-pin SOT23 package. Pricing starts at $0.49 for 1K units. The XRP6668 is available now in volume quantities and offered in a RoHS compliant, "green" halogen free 8-pin SOIC package with exposed pad. Pricing starts at $0.79 for 1K units. The XRP431L is available now in volume quantities and offered in 5-pin SOT23 package. Pricing starts at $0.17 for 1K units.

Additional information on the XRP6658 product can be found at:

http://www.exar.com/Common/Content/ProductDetails.aspx?ID=XRP6658.

.Additional information on the XRP6668 product can be found at: http://www.exar.com/Common/Content/ProductDetails.aspx?ID=XRP6668.

Additional information on the XRP431L product can be found at: http://www.exar.com/Common/Content/ProductDetails.aspx?ID=XRP431L.

Additional information on Exar's other step down regulators can be found at  http://www.exar.com/Common/Content/Product.aspx?Parent=2&ID=7252&SubID=63.

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.

SOURCE Exar Corporation