News & Events
Intersil Launches Quad Regulator IC to Support a Broad Range of Medical, Industrial, Computing and Telecom Applications

-- High integration with full features enables space and cost savings~-- Features include four supplies in one, protection, power-on reset and soft-start

MILPITAS, CA, April 27, 2004 – Intersil Corporation (NASDAQ: ISIL), a world leader in the design and manufacture of high performance analog solutions, today announced the new Endura™ ISL6521 quad regulator IC. This advanced solution includes one switching regulator, for up to a 20-A load, and three linear regulators that each drive 120 mA, or 3 A with external transistors. High integration brings these four regulators together with full protection, power-on reset and soft-start features in one space- and cost-saving IC. Applications for this new IC range broadly, providing power solutions for FPGAs, ASICs, POL, embedded systems and input/output across medical, industrial, computing and telecom.

“Our customers are requiring higher and higher integration of their power solutions to meet vital space and cost points while retaining high performance,” said Cindy Drapcho, Vice President of Intersil’s Power Products. “The ISL6521 delivers what customers require at the lowest overall solution cost in the industry. The high integration simplifies the power solutions and, with Intersil support, reduces design time and time-to-market.”

The ISL6521 monitors and precisely controls one synchronous-buck converter and three configurable linear regulators from a +5V bias input. The synchronous-buck PWM regulator provides the most power to a primary load. Often, this primary load is the core voltage of an FPGA, ASIC or embedded processor. The linear regulators are designed to regulate three additional system voltages. Typically, these include any I/O, memory, or clock voltages that might be required.

All four regulator outputs are adjustable between 0.8 V and 4.0 V providing +/-2 percent regulation over the full temperature range. All outputs are over-current protected. The PWM controller uses the upper MOSFET’s on-resistance, rDS(ON) to monitor the current. The linear controllers monitor their respective feedback (FB) pins for under-voltage events to protect against excessive currents.

ISL6521 Technical Summary

• Four regulated low-voltage outputs – 1 PWM, 3 LDOs
  • 0.8 to 4.0 V output range for all regulators
  • 2 percent regulation over full temperature range
  • Over-current protection
  • 16-lead SOIC package (Pb-free available)
• High performance PWM regulator
  • Up to 20-A capability
  • High-bandwidth error amplifier for fast response
  • 0 to 100 percent duty cycle
  • MOSFET RDS(ON) current sensing saves component cost
• Three linear regulators (LDOs)
  • 120 mA direct drive
  • 3 A capability with external transistors

ISL6521 Pricing and Availability
The ISL6521 is available now. The suggested resale price in 100 to 999-unit quantities for the ISL6521CB is $2.25 each. ICs are available on tape and reel. Additional information on these and other high-performance power solutions can be obtained online from Intersil’s Power Web site at: http://www.intersil.com/power/ 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 and Endura are trademarks of Intersil Americas Inc.
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