Intersil Releases New Highly Integrated LNB Control Voltage Regulators

    Business Editors/Technology Writers

    MILPITAS, Calif.--(BUSINESS WIRE)--Feb. 24, 2005--

    ISL6424 and ISL6425 Provide Dual and Single Output LNB Supply and Control Voltage Regulation with an I(2)C Interface for Advanced Dual
    or Single Tuner Satellite Set-Top Box Designs

    Intersil Corporation (NASDAQ:ISIL), a world leader in the design and manufacture of high performance analog solutions, today announced two new highly integrated solutions for providing power and control signals from advanced set-top box (STB) units to the satellite dish low-noise block (LNB) down converter. These new power and control ICs offer high integration to reduce space and costs, high-power efficiency to reduce power dissipation and heat and high-reliability to ensure long service in customer premise equipment. The ISL6424 is specifically designed for supplying power and control signals from advanced STB modules to the LNBs of two antenna ports, while the ISL6425 performs the same functions as the ISL6424 but for the LNB of only one antenna port. Both devices are designed for compliance with 2.5V/3.3V logic and are pin-to-pin compatible and complement Intersil's current device offerings for 3.3V/5V logic.
    The ISL6424 is comprised of two independent current mode boost PWMs and two low-noise linear regulators along with the circuitry required for 22kHz tone generation, modulation and I(2)C device interface. Both supply and control voltage outputs for two low-noise LNBs are available simultaneously in any output configuration. Each output channel is capable of providing 750mA of continuous current and the over-current limit can be digitally programmed. The device allows the 13V to 18V transition with an external pin, overriding the I(2)C input. To protect against overheating, the step-up converter and the linear regulator are shut off when the junction temperature exceeds 150 degrees C (typical). Normal operation is resumed when the junction is cooled down to 135 degrees C (typical).
    "With the introduction of these new controllers, Intersil makes the total LNB supply design simple, efficient and compact with low external component count," said Tommy Sokola, senior marketing manager for Intersil's General Purpose Power Products. "The ISL6424 and ISL6425 output voltage regulators are ideals choice for advanced satellite set-top box and personal video recorder applications."

ISL6424 and ISL6425 Features

-- Single chip power solution

-- True dual operation for 2-tuner/2-dish applications (ISL6424 only)

-- Both outputs may be enabled simultaneously at maximum power (ISL6424 only)

-- Integrated DC-DC converter and I(2)C interface

-- Switch-mode power converter for lowest dissipation

-- Boost PWMs with greater than 92 percent efficiency

-- Selectable 13V or 18V outputs

-- Digital cable length compensation (1V)

-- I(2)C compatible interface for remote device control

-- Registered slave address

-- Full 3.3V/5V operation up to 400kHz

-- External pin(s) select 13V/18V option

-- DSQIN and SEL18V pins 2.5V logic compatible

-- Built-in tone oscillator factory trimmed to 22kHz

-- Facilitates DiSEqC (EUTELSAT) encoding

-- Internal over-temperature protection and diagnostics

-- Internal over-load and over-temp flags - Visible on I(2)C

-- LNB short-circuit protection and diagnostics

Applications

-- LNB power supply and control for satellite set-top boxes

    ISL6424 and ISL6425 Pricing and Availability

    The ISL6424 and the ISL6425 are available now in standard lead finish and Pb-free, in a 5 mm x 5 mm, 32-lead QFN package. The ISL6424 is also available in a 28-lead EPSOIC package. The suggested price in 10,000 unit quantities is $2.25 for each ISL6424 IC and $1.15 per IC for the ISL6425.
    Additional information on these and other high-performance products can be obtained online from Intersil's web site at: http://www.intersil.com/cda/deviceinfo/0,0,ISL6424,0.html

    About Intersil

    Intersil Corporation, a Nasdaq 100 Index company, is a leader in the design and manufacture of high performance analog semiconductors. The company's products address three of the industry's fastest growing markets: flat panel displays, optical storage (CD and DVD recordable) and power management. Intersil products include power management devices for battery management, hot-swap and hot-plug controllers, linear regulators, supervisory ICs, switching DC-DC regulators and power MOSFET drivers; optical storage laser diode drivers; DSL line drivers; video and high performance operational amplifiers; data converters; interface ICs; analog switches and multiplexers; crosspoint switches; voice-over-IP devices; and ICs for military, space and rad-hard applications. For more information about Intersil or to find out how to become a member of our winning team, visit the company's web site and career page at http://www.intersil.com.

    This release may include "forward looking statements" that are subject to risks and uncertainties. For information identifying economic, political, climatic, currency, regulatory, technological, competitive and some other important factors that could cause actual results to differ materially from those anticipated in the forward looking statements, see Intersil's Safe Harbor Forward Looking Statement disclaimer found at http://www.intersil.com/legal.asp, as well as Intersil's SEC filings as updated from time to time, found at http://www.sec.gov.

    All other trademarks mentioned are the property of their respective owners.

--30--CP/mi*

CONTACT: Intersil, Palm Bay, Fla. Ron Paciello, 321-724-7184 E-Mail: rpaciell@intersil.com or John Allen, 321-729-4928 E-Mail: jallen01@intersil.com

KEYWORD: CALIFORNIA INDUSTRY KEYWORD: HARDWARE SOFTWARE NETWORKING PRODUCT SOURCE: Intersil Corporation

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