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Last updated on April 21, 2014 at 1:20 EDT

Microsemi Expands Power Management Portfolio With Advanced Controller for Multi-Voltage Systems; New Dual PWM Controller Simplifies Design, Improves Power Conversion Efficiency

October 9, 2008

IRVINE, Calif., Oct. 9, 2008 (GLOBE NEWSWIRE) — Microsemi Corporation (Nasdaq:MSCC), a leading manufacturer of high performance analog/mixed signal integrated circuits and high reliability semiconductors, today announced production of its LX1752(tm) dual PWM controller optimized for systems requiring multiple low voltage, high current power supplies in set-top box, broadband modem, digital television, and data center equipment applications.

These systems deploy sophisticated digital integrated circuits and processors which draw large currents at low voltages and require power supply circuitry with superior transient response. Microsemi’s LX1752 controller provides this transient performance while offering advanced features for simplified system design. In addition, the controller’s synchronous rectification provides higher power conversion efficiency necessary in addressing today’s green initiatives.

KEY FEATURES

     *  Single supply voltage operation 4.5V to 22V    *  Independent programmable power sequencing control    *  Programmable PWM frequency range 180kHz to 1.6MHz    *  PWM outputs operation out of phase 

The LX1752 controller’s single supply voltage simplifies system power circuitry while saving bill of materials costs by combining the IC’s operating supply with the supply for power conversion. Independent programmable power sequencing control simplifies the device power sequencing often required in systems using sophisticated digital integrated circuits or processors. PWM frequency and soft start times are also programmable. The controller drives N-channel MOSFETs with output currents up to 13 Amps.

When using the LX1752 controller’s dual outputs, or when cascading multiple devices, PWM outputs are operated out of phase to reduce system noise, input cap capacitance and cost. For single device operation, the outputs are 180 degrees out of phase, whereas in dual implementation the outputs are 90 degrees out of phase.

“Our new LX1752 dual controller solves power management problems that system designers face using complex analog and digital ICs,” said Richard Johnson, DC/DC Product Line manager at Microsemi’s Analog Mixed Signal Group. “By working closely with our customers, and taking a system perspective, we can offer superior performance while reducing their bill of materials costs. The LX1752 also joins our successful LX1675(tm) triple PWM controller in Microsemi’s power management portfolio.”

Pricing and Availability

The LX1752 controller is in production in an RoHS compliant 28-pin, 4x5x1mm QFN package. Pricing in 10,000 unit quantities is $0.86. Datasheets, application notes and evaluation kit information is available at Microsemi’s website: http://www.microsemi.com.

Attachments:

http://www.microsemi.com/drawings/fig1_lx1752schematic.jpg

http://www.microsemi.com/drawings/fig2_lx1752package.jpg

About Microsemi

Microsemi Corporation, with corporate headquarters in Irvine, California, 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 website at http://www.microsemi.com.

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 CONTACT:  Microsemi Corporation           Financial Contact:           John Hohener, Vice President and CFO             (949) 221-7100           Editorial Contact:           Cliff Silver, Corporate Communications Manager             (949) 221-7100