SOURCE: Primarion, An Infineon Technologies Company

Primarion, An Infineon Technologies Company

February 17, 2009 10:33 ET

Primarion Introduces Industry's Smallest Integrated Power Stage (iPS ™)

PX4650 and PX4640 Deliver Small Form Factor Power Regulation for Point-of-Load Applications

TORRANCE, CA--(Marketwire - February 17, 2009) - Primarion, an Infineon Technologies (FRANKFURT: IFX) (NYSE: IFX) subsidiary and a mixed-signal semiconductor company that designs, manufactures and markets power integrated circuits (ICs), introduces the PX4650 and PX4640, industry's smallest integrated power stage (iPS™) offering superior performance for high power density solutions required by servers, storage equipment and routers.

High Efficiency and Density Driven

Primarion's PX4650 and PX4640 accommodate current industry demands for higher power density in space constrained applications and integrated modules by minimizing the number of external components. The new power stage integrates low RDSon N-Channel MOSFETs for both high and low side FETs together with high and low side MOSFET drivers. Full integration of drivers and FETs minimizes switching losses while providing industry's leading high power density integrated solutions.

"Efficiency has become a key industry driver in the computing and data storage industry," said Deepak Savadatti, vice president of marketing at Primarion. "With Primarion iPS™, the inherent low RDSon that improves on mid- to full-load efficiency and along with low switching losses that benefit light load efficiency, are the key advantages differentiating our product in the market. The overall performance of iPS™-based solutions offers high efficiency across the entire operating range."

When combined with Primarion's digital multiphase or Di-POL™ controllers, PX4650 and PX4640 offer a complete high current small form factor voltage regulation solution that supports an average output current of up to 50A in 24mm(2) (per phase) surface area with superior system efficiency, high output voltage accuracy, fast transient response and extensive protection features. With such capability, Primarion is able to provide the industry with the highest density Vcore and memory power solutions that achieve 92 to 94 percent efficiency.

Complete Protection with Design Flexibility

Both PX4650 and PX4640 contain a number of self-protection features. Primarion's integrated pulse-by-pulse peak current limit provides instantaneous response to any over-current conditions. The PX4650 and PX4640 also have integrated temperature sensors that provide on-die measurement of FETs' junction temperatures. When used with Primarion controllers, this feature provides accurate and programmable over-temperature protection.

Design benefits of the PX4650 and PX4640 include: a standard footprint that offers scalability and ease of PCB layout; flexible and simplified design that achieves reliable performance; reduced board space and fewer component count which lower the solution cost; low RDSon that yields higher efficiency; process and temperature independent current sensor that provides accurate over current protection; and a 20-lead QFN package which offers small footprint with ease of manufacturability. All these features are ready to meet manufacturers' needs for the highest power density in the industry.

Summary of Features:

--  Fully integrated drivers with high-side and low-side output FETs in
    QFN package
--  Highest power density solution when combined with Primarion® Digital
    Multiphase or Di-POL™ controllers
--  50A (PX4650) or 40A (PX4640) output current carrying capability per
    power stage
--  Greater than 92% efficiency for Vcore multiphase solutions
--  Input Under Voltage Protection (IUVP)
--  Average Current Limit protection when combined with a Primarion
    Digital Controller
--  Integrated Pulse-by-Pulse Peak Current Limit (P2CL)
--  Integrated over-temperature protection
--  Temperature Monitor
--  Switching Frequency 200kHz - 1.3 MHz
--  Three-state PWM input compatible (3.3V or 5.0V)
--  RoHS compliant 4mm x 6mm QFN package


Primarion's PX4650 and PX4640 are now available for general sampling.

More information about PX4650 and PX4640 is available by contacting Primarion at (866) 321-7746 or by visiting the company's Web site at

About Primarion:

Primarion, an Infineon Technologies (FRANKFURT: IFX) (NYSE: IFX) subsidiary, is a mixed-signal integrated circuit company that addresses key inflection points in power conversion and power management driven by the exploding demand for digital content and information. Primarion's digital power ICs are positioned to beat traditional analog power ICs in cost per amp and performance, while offering features with advantages that grow with each new processor generation. Headquartered in Torrance near Los Angeles, Calif. (USA), the company also has an Asian regional office in Taipei, Taiwan. Infineon Technologies AG is a Neubiberg, Germany based company, which operates through its subsidiaries in the U.S. from Milpitas, Calif., in the Asia-Pacific region from Singapore, and in Japan from Tokyo. Additional information is available online at

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