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ISL6420A
ISL6420A

Jan 03 2006
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Intersil Introduces Wide-Input Advanced PWM Controller

MILPITAS, CA, January 3, 2006 – Intersil Corporation (NASDAQ: ISIL), a world leader in the design and manufacture of high-performance analog solutions, today introduced a wide-input advanced PWM (pulse width modulation) controller. The ISL6420A supports a wide range of applications (5V and 12V intermediate bus voltages) and several industrial, medical and consumer electronics applications with high input voltage.

“With programmable switching frequency, programmable soft start, external compensation and two package choices, Intersil’s ISL6420A provides high flexibility for the designer,” said Sarika Arora, marketing manager of Intersil’s Power Management group. “It also integrates control, output adjustment, monitoring and protection features into a single package.”

Flexibility and Wide Input Range
The ISL6420A provides programmable switching frequency from 100 kHz-1.4 MHz. The output voltage of the converter can be precisely regulated as low as 0.6V, with a maximum tolerance of plus or minus 1.0 percent over temperature and line voltage variations. The PWM duty cycle ranges from 0 percent to 100 percent in transient conditions.

Intersil’s ISL6420A has voltage mode control architecture with external compensation for added flexibility and fast transient response. Pgood monitors the output voltage and an external capacitor allows the user to delay Pgood and eliminates the need for an extra supervisory IC on the board.

This device features an external reference voltage tracking mode for externally referenced buck converter application and DDR (double data rate) termination supplies, as well as a voltage margining mode for system testing in networking DC/DC converter applications. The ISL6420A starts up in a pre-biased load and includes protection features like over-voltage, over-current, under-voltage lock-out and over-temperature shutdown. The error amplifier features a 15 MHz gain-bandwidth product and 6V/us slew rate that enables high converter bandwidth for fast transient response.

Key Features
  • Operates from 4.5V to 28V input
  • Excellent output voltage regulation
    • 0.6V internal reference
    • Plus or minus 1.0 percent reference accuracy over line and temperature
  • Resistor-selectable switching frequency
    • 100 kHz to 1.4 MHz
  • Voltage margining and external reference tracking modes
  • Programmable soft-start
  • Fast transient response
    • High bandwidth error amplifier
    • Full 0 percent to 100 percent duty cycle
Target Applications
  • Point-of Load (POL) applications
  • DC/DC conversion for 5V and 12V bus architectures
  • DSP and ASIC core power supply
  • LCD TV designs
  • Industrial and medical applications
  • Portable instrumentation
  • Routers, switchers, datacommunications and telecommunications applications
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 http://www.intersil.com/power.

Pricing and Availability
The ISL6420A is available now in 20-lead QFN and QSOP packages and is priced at $1.39 in 1,000-unit quantities. More information on the ISL6420A is available at http://www.intersil.com/cda/deviceinfo/0,1477,ISL6420A,0.html. A large selection of power products is supported by Intersil’s iSim™ online design tool. To explore these solutions, visit http://www.intersil.com/isim/. To view a broad range of application block diagrams, visit Intersil’s Application Design Center at http://www.intersil.com/apps.

Note to editors: To view a high-resolution downloadable photo of the ISL6420A, visit Intersil’s photo room at: http://www.intersil.com/pressroom/photoarchives.asp. About Intersil
Intersil Corporation (NASDAQ: ISIL) 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, handhelds 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.

iSim is a trademark of Intersil Americas, Inc. All other brands or product names are trademarks or registered trademarks of their respective holders.

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