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Intersil's Two-Phase Core Controller Provides Fast Transient Response and Improved Load Line Accuracy for AMD Turion® Mobile CPUs

— ISL6264 Core Controller Uses Intersil’s Patented R³ Technology™ for Better Transient Response and Two Interleaved Channels to Reduce Output Voltage Ripple with Fewer Components

MILPITAS, CA, October 4, 2006 – Intersil Corporation (NASDAQ Global Select: ISIL), a world leader in the design and manufacture of high-performance analog semiconductors, today introduced a new two-phase core controller with embedded gate drivers to power AMD’s next-generation (64-bit Turion™) mobile CPUs. This device offers improved transient response and load line accuracy enabled by Intersil’s patented R³ (Robust Ripple Regulator) Technology™.

Intersil’s new R³ controller uses post-package trimming to remove all errors associated with assembly and offers 0.5% accuracy across the entire temperature range, which is the best in the industry. The device uses two interleaved channels to double the output voltage ripple frequency, reducing output voltage ripple amplitude with fewer components, lower component cost, reduced power dissipation and smaller real estate area.

“The ISL6264 uses Intersil’s patented R³ Technology to meet the transient response and light-load efficiencies required by AMD (Turion™) processors,” said Majid Kafi, director of Intersil’s Notebook Power products group. “Intersil now offers a vast number of products that power the latest CPUs by both Intel and AMD. The dynamic phase adding/dropping optimizes the efficiency of the CPUs, improving battery life.”

Intersil’s Core Controller for AMD Turion Mobile CPUs
The ISL6264 is a two-phase controller with embedded gate drivers. The heart of the ISL6264 is the patented R³ Technology, Intersil’s Robust Ripple Regulator modulator. Compared with traditional multiphase controllers, the ISL6264 has the fastest transient response due to the R³ modulator commanding variable switching frequency during a load transient.

To boost battery life, Intersil’s ISL6264 supports PSI_L by automatically enabling different operation modes. At heavy load operation in the active mode, the controller commands the two-phase continuous conduction mode (CCM) operation. While the PSI_L is asserted during the deeper sleep mode or the light load of active mode, the ISL6264 smoothly disables one phase and operates in a one-phase diode emulation mode (DE) to maximize the efficiency at light load.

A 6-bit digital-to-analog converter (DAC) allows dynamic adjustment of the core output voltage from 0.375V to 1.55V. 0.5% system accuracy of the core output voltage over temperature at active mode is achieved with the ISL6264.

A unity-gain differential amplifier is provided for remote CPU die sensing. This allows the voltage on the CPU die to be accurately measured and regulated per AMD mobile CPU specifications. Current sensing can be realized using either lossless inductor DCR sensing or precision resistor sensing. A single NTC thermistor network thermally compensates the gain and the time constant of the DCR variations.

Key Features

• Precision two-phase core voltage regulator
• 0.5% system accuracy over temperature
• Enhanced load line accuracy
• Adjustable OFFSET for voltage positioning
• Dynamic phase adding/dropping
• 6-bit microprocessor voltage identification (VID) input
• Support VID change on-the-fly
• Internal gate driver with 2A driving capability
• Lossless Inductor DCR Current Sensing
• Precision resistive current sensing
• Differential remote CPU die voltage sensing
• Static and dynamic current sharing
• Audio filter enable or disable
• Over-voltage, under-voltage, and over-current protection
• Small footprint of 40-lead QFN in 6x6mm²

Target Applications

• Notebook computer systems
• LCD-PC systems
• SAN or NAS systems
• Point of sale terminals
• Blade servers

About Intersil’s Power Management Portfolio
Intersil’s high-performance analog ICs provide innovative power management solutions for applications in the computing, communications, peripherals, display, networking, telecommunications, industrial, instrumentation and battery-powered products markets. Intersil is a leading supplier of PWM controller ICs with over two billion units shipped. Intersil offers a broad portfolio of power management ICs, including single and multiple output switching regulators, integrated FET DC/DC controllers, battery management ICs, hot plug controllers and power MOSFET drivers. To learn more, visit Intersil’s Power Management page at http://www.intersil.com/power.

Pricing and Availability
The ISL6264 is available now in a 40-lead QFN package and is priced at $3.80 in 1,000-unity quantities. Evaluation boards are also available for the ISL6264.

More information on the ISL6264 is available at http://www.intersil.com/cda/deviceinfo/0,1477,ISL6264,0.html.

Note to editors: To view a high-resolution downloadable photo of the ISL6264, visit Intersil’s photo room at: http://www.intersil.com/pressroom/photoarchives.asp.

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, handheld products and notebook computing. Intersil’s product families address both power management and analog signal processing functions. Intersil products include ICs for battery management; hot-swap and hot-plug controllers; linear regulators; supervisory ICs; switching DC/DC regulators; 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 www.intersil.com.

R³ Technology is a trademark of Intersil Americas, Inc. Turion is a trademark of Advanced Micro Devices, Inc. All other brands or product names are trademarks or registered trademarks of their respective holders.