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World's Highest Light Load Efficiency MOSFET Gate Drivers Save Cost and Board Space in Multiphase Switching Regulator Designs for Intel(R) VR11.1 CPUs
(Marketwire Via Acquire Media NewsEdge) MILPITAS, CA, October 9 / MARKET WIRE/ --
Intersil Corporation (NASDAQ: ISIL), a world
leader in the design and manufacture of high-performance analog
semiconductors, today announced a new series of 12V to 5V synchronous
rectified buck MOSFET drivers that provide the industry's best light load
efficiency for Intel VR11.1 systems.
The
ISL6622,
ISL6622A, and ISL6622B provide 3A sinking capacity and feature rapid
rise/fall times that support up to 1MHz frequency switching. This delivers
very high overall efficiency.
Combined with Intersil's VR11.1 PWM controllers and with N-Channel MOSFETs,
the ISL6622's advanced PWM protocol supplies a complete core-voltage
regulator solution for advanced microprocessors.
The ISL6622 enables diode emulation operation during PSI mode for enhanced
light load efficiency and allows Discontinuous Conduction Mode (DCM) by
detecting when the inductor current reaches zero. When "zero" is detected,
the low side MOSFET is turned off to prevent sinking current and
eliminating the power loss associated with the reverse currents. Intersil's
gate voltage optimization technology (GVOT) is also active during PSI mode;
by reducing the gate drive voltage, switching losses, which dominate total
power loss at light loads, are significantly reduced. This adds to the
overall efficiency the ISL6622 provides.
These PWM controllers also include adaptive shoot-through protection to
prevent both the upper and lower MOSFETs from conducting simultaneously. In
addition, they integrate a 20k ohms high-side gate-to-source resistor to
prevent self turn-on due to high input bus differential voltage.
Overvoltage protection can be operational while VCC is below the POR
threshold: the PHASE node is connected to the gate of the low side MOSFET
(LGATE) via a 10k ohms resistor, so the output voltage of the converter is
maintained close to the gate threshold of the low side MOSFET. This
capability protects the load in case the upper MOSFET(s) become shorted.
The drivers come in two package types with different drive voltages. In the
8-lead SOIC package, the ISL6622 drives the upper and lower gates to VCC
during normal PWM mode; the lower gate drops to a fixed typical 5.75V in
PSI mode. In the 10-Lead DFN ISL6222A, the upper gate can be driven from 5V
to 12V via the UVCC pin; the lower gate has a resistor-selectable drive
voltage of typical 5.75V, 6.75V, and 7.75V in PSI mode.
These drivers are designed for a wide range of server, workstation, desktop
and gaming motherboard applications built around Intel processors. They
also are an ideal design choice for VRM applications.
Pricing and Availability
The ISL6622/A/
B are available now in 8-lead SOIC packages, priced at $1.00 each in 1,000
unit quantities, and in 10-lead DFN packages priced at $1.07 each in
1,000-unit quantities.
For more information on the ISL6622 go to
http://www.intersil.com/cda/deviceinfo/0,1477,ISL6622,0.html
For more information on the ISL6622A go to
http://www.intersil.com/cda/deviceinfo/0,1477,ISL6622A,0.html
Note to editors: To view a high-resolution downloadable photo of the
ISL6622 and
ISL6622A, visit Intersil's photo room at:
http://www.intersil.com/pressroom/photoarchives.asp.
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 PWM s, to
quad-voltage hot-swap controllers. As a leading supplier of PWM controller ICs with over two
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.
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, 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; 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
Media Contact:
Rob Purdie
Intersil Corporation
(321) 724-7688rpurdie@intersil.com
Copyright ? 2008 Marketwire
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