Industry's Best Efficiency, Transient Performance Now in Four and Six Phase PWM Controllers for Intel Core Processor Applications

MILPITAS, CA -- (MARKET WIRE) -- Sep 22, 2008 -- Intersil Corporation (NASDAQ: ISIL), a world leader in the design and manufacture of high-performance analog semiconductors, has expanded its growing family of VR11.1-compliant PWM controllers with new 4-phase and 6-phase PWM controllers that feature the industry's highest light load efficiency and very fast transient performance.

The ISL6334 and ISL6334A are 4-phase PWM controllers and the ISL6336 and ISL6336A are 6-phase PWM controllers. Both sets regulate microprocessor core voltage by driving multiple channels (up to four for the ISL6334s and up to six for the ISL6336s) using a multiphase architecture that increases channel ripple frequency. The architecture also reduces input and output ripple currents. This enables the use of fewer total components, resulting in a smaller total footprint, lower cost, reduced power dissipation, and improved reliability.

Designed for server, desktop, workstation and gaming motherboards based upon Intel's VR11.1 CPUs, the controllers meet the tightly regulated output voltage position requirements of new microprocessors by using patented techniques to sense output current continuously. They measure the voltage across the DCR of the output inductor or a dedicated current sense resistor to provide the needed signals for precision droop, channel-current balancing and overcurrent protection. When using DCR current sensing, compensation of all thermal effects is accomplished through addition of a single low-cost NTC resistor network.

The ISL6334 and ISL6336 each implement combinations of phase dropping, diode emulation and gate voltage optimization technology (GVOT). This combination provides best-in-class light load efficiency performance. The ISL6334A and ISL6336A also each offer phase dropping.

This family of PWM controllers also support both standard and coupled inductor implementations and deliver +/-0.5% system accuracy over life, load, line and temperature, providing a very tight regulation window to improve load line accuracy. Active pulse positioning and adaptive phase alignment technology developed by Intersil deliver very fast transient response and low COUT.

The new controllers also are excellent design choices for voltage regulator modules.

Pricing and Availability

The ISL6334 and ISL6334A are available now in 40-lead, 6mm x 6mm QFN packages. The ISL6334 is priced at $2.44 each in 1,000-unit quantities; the ISL6334A is priced at $2.22 in 1,000-unit pieces.

The ISL6336 and ISL6336A are available now in 48-lead, 7mm x 7mm QFN packages. The ISL6336 is priced at $3.00 each in 1,000-unit quantities; the ISL6336A is priced at $2.70 each in 1,000-unit quantities.

For more information on the ISL6334 go to,1477,ISL6334,0.html.

For more information on the ISL6334A go to,1477,ISL6334A,0.html.

For more information on the ISL6336 go to,1477,ISL6336,0.html.

For more information on the ISL6336A go to,1477,ISL6336A,0.html.

Note to editors: To view a high-resolution downloadable photo of ISL6334, ISL6334A and ISL6336, ISL6336A, visit Intersil's photo room at: visit Intersil's photo room at:

About Intersil's Computing Power Management Products

Intersil is the world leader in power management solutions for computing. The company's broad selection of power management ICs include high-integration, multi-output and multiphase PWMs and highly integrated switching/linear controllers for peripheral supplies. With a commitment to helping desktop and notebook PC and server designers achieve higher efficiency and lower cost designs, Intersil is a proven resource for today's PC and server manufacturers.

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 automotive ICs, flat panel displays, cell phones and 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. The Intersil product lines include 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

Media Contact
Rob Purdie
Intersil Corporation
(321) 724-7688

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