Intersil Releases Advanced PCI/PCI-X Hot Plug Controller.

Business Editors/High-Tech Writers

MILPITAS, Calif.--(BUSINESS WIRE)--April 12, 2004

Intersil Corporation (Nasdaq:ISIL):

-- New IC Controls 4 Supplies with Programmable Over-Current

Regulation and Fault Duration

-- Increased Integration Reduces Board Space and

Bill-of-Materials Costs

Intersil Corporation (Nasdaq:ISIL), a world leader in the design and manufacture of high performance analog solutions, today announced the release of the ISL6111 Hot Plug controller IC. This advanced IC offers increased integration with the inclusion of over-current and timing features that improve system performance while reducing the bill-of-materials (BOM) cost and board space. Targeted for servers, the ISL6111 is the industry's most complete and highly integrated Hot Plug solution for PCI and PCI-X.

"Our new ISL6111 is a performance and value upgrade for server board designers who are still using multiple-IC solutions that take up precious board space and add to the BOM and manufacturing costs," said Cindy Drapcho, Vice President of Intersil's Power Products. "No competing IC offers such an integrated solution that controls all four power rails with programmable current limiting and over-current duration timing in a near-chip-scale 5 X 5 mm package."

A complete PCI slot power control solution is accomplished with one small ISL6111, two power MOSFETs and a few passive components. It provides a maximum current regulation to the load for each supply. Load current limiting begins when the load current on any of the four rails exceeds the user-programmed level and continues for the user-determined period of time. The current-regulation level is set using a single resistor and the duration is set with a single capacitor.

The ISL6111 provides PCI or PCI-X slot power control for the four legacy supplies (-12 V, +12 V, +5 V and +3.3 V). For the 3.3-V and 5-V supplies, current monitoring is accomplished by sensing the voltage across external current-sense resistors and current regulation is provided by active current modulation through external N-channel MOSFETs. For the +12-V and -12-V supplies, both current monitoring and current regulation are provided internally.

Any over-current condition places the associated control switch in a linear mode to regulate current to the resistor-programmed level. An over-current condition is defined as a current level, greater than the programmed setting, that transitions through the threshold with a quick ramp (less than 0.5 us). This current regulation mode is maintained until the over-current condition ceases or the regulation duration period, as determined by selected capacitor value, expires. In the current-regulation mode the IC's timing pin charges the capacitor with a 20-uA current until the capacitor voltage reaches 2.8 V, at which time a turn-off latch is set on all four control switches. This results in the open drain fault (FLTN) output going low, signaling a latched off state. Cycling the ENABLE pin low clears the FLTN latch.

ISL6111 Technical Summary

-- Highly integrated, feature-rich PCI and PCI-X Hot Plug

controller

-- Controls all four Voltage rails

-- Resistor programmable over-current detection and current

regulation for all rails

-- Capacitor programmable over-current duration

-- Adjustable turn-on slew rate for soft start

-- Integrated control switches for the +12 and -12 V rails

-- Gate drive for external N-channel MOSFETs for the +3.3 and +5

V rails

-- Near-chip-scale 5 X 5 mm QFN package saves space and offer

enhanced thermal efficiency 

-- More: http://www.intersil.com/power/powersupply.asp

ISL6111 Pricing and Availability

The ISL6111 is available now in the space-saving 5 X 5 mm QFN (ISL6111IR) package. The suggested resale price in 100 to 999 unit quantities is $4.50 for each IC.

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 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.

Intersil is a trademark of Intersil Americas Inc.

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