-- Targets Memory, DSP, and Microprocessor Voltage Supplies -- High Efficiency for Battery-Powered Applications -- Ideal for Point of Load Regulation
IRVINE, Calif., July 28, 2005 (PRIMEZONE) -- Microsemi Corporation (Nasdaq:MSCC), a leading manufacturer of high performance analog/mixed signal integrated circuits, has announced a new high-efficiency step-down synchronous converter providing the precise voltage sources needed by application specific integrated circuits (ASICs), memory or input/output devices. Its design is also ideal for applications using single cell Li ion or three-cell NiMH/NiCd batteries.
Designated the LX(tm)1918, the new regulator features synchronous rectification that eliminates the need for an external Schottky diode and maximizes efficiency for high step-down ratios requiring low voltage outputs. The device operates in current mode pulse width modulation (PWM) and includes internal compensation to minimize and simplify the selection of external components.
"We designed the LX1918 to provide cost savings, ease of design-in, and efficiency for applications needing multiple outputs and precise regulation at the point of load," said Paul Bibeau, Sr. Vice President and General Manager of Microsemi's Integrated Products Group. "Customers have expressed the greatest interest in the LX1918 for their set-top boxes, hard disk drives, wireless base stations and xDSL applications."
Input voltage can range from 2.7 volts to 6.0 volts, and the output can provide 1.8 amps of current. From its 0.6 volt reference design, the LX1918 is capable of tightly-regulated output voltages that are easily programmed by the selection of two external resistors.
The LX1918 features a light load detection circuit that maximizes efficiency over the entire load range by entering a low-frequency PWM mode. This mode can be overridden to a fixed frequency for applications sensitive to electromagnetic interference. Efficiency is rated up to 95%.
The new LX1918 integrated circuit is packaged in a 3mm square 8-pin JEDEC MO-229 package providing a small form factor, a profile below 1mm, and excellent power dissipation from its integrated heat sink. It is available for immediate sampling and delivery, with 10K quantity pricing at $0.67.
Complete technical information is available on the Microsemi web site, www.Microsemi.com. Samples can be requested through this site, from Microsemi sales representatives, or from Microsemi's distribution sales channel.
About Microsemi Corporation
Microsemi is a leading designer, manufacturer and marketer of high performance analog and mixed signal integrated circuits and high reliability semiconductors. The company's semiconductors manage and control or regulate power, protect against transient voltage spikes and transmit, receive and amplify signals.
Microsemi's products include individual components as well as integrated circuit solutions that enhance customer designs by improving performance and reliability, battery optimization, reducing size or protecting circuits. The principal markets the company serves include implanted medical, defense/aerospace and satellite, notebook computers, monitors and LCD TVs, automotive and mobile connectivity applications. More information may be obtained by contacting the company directly or by visiting its web site at http://www.microsemi.com.
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