-- Targets power supplies for set-top box, video processor,
portable computer and peripherals applications
-- Patented LoadSHARE architecture
IRVINE, Calif., Feb. 14, 2006 (PRIMEZONE) -- Microsemi Corporation (Nasdaq:MSCC), a leading manufacturer of high performance analog/mixed signal integrated circuits, announced today that its Integrated Products Group has added an expanded-feature device to its line of multiple output controllers used in power supplies for set-top box, video processor and a wide variety of multi-output power supply applications in portable computers and peripherals.
Designated the LX1675, the latest device is a highly integrated power supply controller featuring three voltage mode pulse-width modulation (PWM) switching regulator stages with a linear regulator driver as the fourth output.
Operation from a single input voltage ranging from 4.5V to 24V greatly simplifies the users system. Features include selectable PWM frequency: 300KHz for highest efficiency or 600KHz for smaller component sizes. External compensation is used to optimize the PWM dynamic response and maintain flexibility with the passive power component selection.
"For a designer needing current greater than what can be sourced from a single phase, Microsemi's patented LoadSHARE multiphase switching regulator architecture uses sensed voltages to achieve efficient and accurate forced current sharing and programmable current sharing power supply management," said Paul Bibeau, Sr. Vice President and General Manager of Microsemi's Integrated Products Group.
Soft start is programmable for each output and the fault mode response can be either: independent restart of each output or full re-sequencing of the controller. A buffered reference output is available for generating additional regulated outputs. Current sensing without external resistors helps to keep the total solution cost low.
High current N-channel MOSFETs are driven directly by the LX1675 to provide output current up to 15 amps for each PWM controller delivering currents that are useful for input/output, memory, termination, and other power supplies surrounding a wide range of microprocessor-based systems. Outputs can be set as low as 0.8V, generated from a precision internal reference.
The LX1675 is packaged in a lead-free and RoHS compliant 38-pin MLPQ surface mount package measuring only 5mm wide by 7mm long.
Unit priced in 10k lot quantities at $1.58, the LX1675 is available for immediate sampling and pre-production quantities. Complete technical information is available on the Microsemi web site, www.Microsemi.com. Samples along with a demonstration board can be ordered through this site or from Microsemi sales representatives and authorized distributors.
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 included implantable 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.
LX and LoadSHARE are trademarks of Microsemi Corporation.
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