SOURCE: Intersil

January 24, 2008 13:38 ET

Intersil Introduces Wide Input Voltage Range Controllers Featuring Independent Digital Enables to Save Power and Board Space

New Intersil ICs Offer Out-of-Phase Switching for Better Noise Performance and Early Warning, Low VIN to Save Critical System Performance Before Total Power Failure

MILPITAS, CA--(Marketwire - January 24, 2008) - Intersil Corporation (NASDAQ: ISIL), a world leader in the design and manufacture of high-performance analog semiconductors, today announced a new family of Triple Sync Buck PWM and LDO Controller. The ISL9440, ISL9440A and ISL9441 are designed to be extremely flexible, operating in a wide input voltage range of 4.5V to 24V, and they offer an independent "digital enable" feature that allows designers to save power and board space.

The digital enable feature on the controllers affords "green" power savings by offering the ability to shut down device rails that are not in use. The digital enable features on the ISL9440, ISL9440A and ISL9441 controllers can also be logic-driven for sequencing to avoid using additional chips, saving cost and board space. In addition, the digital enable feature provides better control for sequencing on power rails than standard analog soft-start.

All three members of this new family of triple sync buck controllers help control noise within the system by offering out-of-phase switching to minimize spikes.

For system and data safety, the ISL9440 and ISL9440A feature an "Early Warning" VIN detection feature that allows 5.5 microseconds for the system to perform functions like writing key registers to memory before the system loses power completely.

For customers with certain specific 5V applications, the ISL9441 without "Early Warning" VIN can be selected.

Pricing and Availability:

Each of the new ICs is available now in a 32-ld QFN package and priced at $4.67 each in 1,000-unit quantities.

More information on the ISL9440 is available at,1477,ISL9440,0.html

More information on the ISL9440A is available at,1477,ISL9440A,0.html

More information on the ISL9441 is available at,1477,ISL9441,0.html

Note to editors: To view a high-resolution downloadable photo of ISL9440 visit Intersil's photo room at:

About Intersil's Power Management Portfolio

Intersil is a recognized global leader in power management solutions, offering a broad portfolio of products that simplify a variety of power designs. Intersil's family of power management ICs ranges from building blocks such as charge pumps, to highly-integrated, multiple-output and multiphase PWMs, to quad-voltage hot-swap controllers. As a leading supplier of PWM controller ICs with over 2 billion units shipped, Intersil addresses a broad range of power management needs for applications that include computing, communications, peripherals, display, networking, telecommunications, industrial, instrumentation and battery-powered products. To learn more, visit Intersil's Power Management Web site at

About Intersil

Intersil Corporation is a leader in the design and manufacture of high-performance analog semiconductors. The Company's products address some of the industry's fastest growing markets, such as, flat panel displays, cell phones, other handheld systems, and notebooks. Intersil's product families address power management functions and analog signal processing functions. Intersil products include ICs for battery management, hot-swap and hot-plug controllers, linear regulators, power sequencers, supervisory ICs, bridge drivers, PWM controllers, 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 radiation-hardened 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

Contact Information

  • Media Contact
    Rob Purdie
    Senior Marketing Representative
    Intersil Corporation
    (321) 724-7688