New Microsemi Boost Controller Cuts Costs in Handheld Appliance Applications
IRVINE, Calif.--(BUSINESS WIRE)--July 16, 2002--
-- High efficiency for 1.6V-6.0V circuits
-- Internal MOSFET design
-- Space-saving PCB footprint
-- Optimized for portable systems
Microsemi Corp. (Nasdaq:MSCC - News) today announced the introduction of a second advanced high efficiency, high voltage boost controller for battery-powered applications including pagers, mobile phones, PDAs, handheld computers and LED drivers.
Designated the LX1742(TM), the new controller features a pseudo-hysteretic pulse frequency modulation topology designed to deliver greater than 80% efficiency, reduce board size and lower total circuit costs.
Microsemi's newest boost controller adds an internal N-Channel MOSFET to the LX1741(TM) device it introduced in February. (The LX1741 utilizes external MOSFETs.) Both controllers guarantee start-up operation at 1.6V input and have an input range to 6.0V, facilitating a wide variety of system battery designs.
The two controllers provide portable appliance designers with maximum flexibility for their high voltage, very light load current applications.
LX1742 design enhancements provide higher overall performance by implementing control circuitry optimized for portable systems. Quiescent supply current is only 80 microamps (typ) and shutdown current is less than 1 microamp.
Output voltages as high as 25V are programmed easily by using two external resistors in conjunction with the LX1742's feedback pin. Dynamic voltage adjustments of +/- 15% can be achieved by either an analog reference signal or a direct PWM input signal applied to the ADJ pin.
"Like the LX1741 before it, our newest boost controller was designed with specifications we believe meet the very specific needs of our mobile product customers," said Kelly Jones, general manager of Microsemi Integrated Products.
"Now their designers can have the option of building their circuits based on controllers having either internal or external MOSFET functions. This gives them a full range of options to maintain overall system efficiency with a cost-effective solution best suited to their individual design needs," he added.
Complete technical information and data sheets are available on the Microsemi Web site, www.Microsemi.com. The LX1742, offered in the industry-standard 8-pin MSOP surface mount package, is priced at $0.99 in 10K quantities. Samples can be ordered through this site, or from Microsemi sales representatives and franchised distributors.
About Microsemi
Microsemi is a leading designer, manufacturer and marketer of analog, mixed-signal and discrete semiconductors. The company's semiconductors manage and regulate power, protect against transient voltage spikes and transmit, receive and amplify signals.
Microsemi products include individual components, as well as complete circuit solutions that enhance customer designs by providing battery optimization, reducing size or protecting circuits. Markets the company serves include mobile connectivity, computer/peripherals, telecommunications, medical, industrial/commercial, space/satellite and military.
More information may be obtained by contacting the company directly or by visiting its Web site at microsemi.com.
Please read the following factors that can materially affect Microsemi's future results.
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Contact:
Microsemi Corp., Irvine
David R. Sonksen (financial/investors), 949/221-7101
Cliff Silver (editorial), 949/221-7112 |
