Demonstrated performance of the NCP5381 enables implementation of more cost-effective power subsystems for computing and consumer electronics applications

PHOENIX, Ariz. – Nov. 14, 2005 – A global supplier of power management products, ON Semiconductor (Nasdaq: ONNN) today introduced of the NCP5381 – the industry’s first asynchronous dual-edge pulse width modulation (PWM) controller. The new controller is ideal for applications such as Pentium IV processor motherboards, VRM modules, and graphics cards where fast transient response and advanced power management are vital.

“Using working PC motherboards, ON Semiconductor has demonstrated the VR10 and VR11-compliant performance of the dual-edge NCP5381 PWM controller,” said Michael Stapleton, director of ON Semiconductor’s Analog Computing Products Group. “Customers who have been shown the live demo have been impressed with the controller because it offers superior performance, can be integrated easily into their existing motherboard designs and ultimately assists in lowering the overall costs of their Vcore power management subsystems.”

One of the key challenges facing CPU power designers is that while long-term trends include increasing current levels and faster current transitions, the voltage to the CPU on a specific motherboard must remain stable while active power demands fluctuate. Designed to enable the power management subsystem to respond to users’ activation of high-performance computing functions, the NCP5381 delivers significantly faster response to load transients than existing industry single-edge, latched, clocked, or synchronous modulation products. This allows the subsystem to operate at a lower frequency - with fewer and smaller hold-up capacitors compared to existing modulation approaches. The result is a physically more compact solution that requires fewer external components and is, in turn, more cost effective than existing solutions.

● Dual-edge PWM for fast initial response to transient loading
● Patent pending Dynamic Reference Injection
● + 0.5% system voltage accuracy
● Remote temperature sensing per VR11
● Backwards compatible with VR10
● “Lossless” differential inductor current sensing

“Within the industry, it has been commonly believed that the next step in CPU power control – and specifically Vcore power control - would require a costly digital control system to overcome the performance limitations of today’s synchronous controller architectures,” said Larry Sims, senior vice president and general manager of ON Semiconductor’s Analog Power Group. “With the successful introduction of our PWM controller, ON Semiconductor has demonstrated that its innovative dual-edge architecture offers a high performance solution for advanced CPU power control that is more cost effective than digital or other analog platforms.”

Complete Solution
Along with the NCP5381, ON Semiconductor’s CPU power control 4-phase solution includes four stand alone 12 volt (V) NCP3418B MOSFET gate drivers for synchronous buck applications. These are offered in SOIC-8 and DFN-10 Pb-free packages. Eight 25 V, single N-Channel MOSFETs are also part of the dual-edge Vcore subsystem solution - four 45 amp (A) NTD50N03R MOSFETs and four 65 A NTD65N03R MOSFETs. Both these devices offer low RDS(ON), low gate charge and low reverse recovery charge, and are offered in Pb-free DPAKs. One driver and two MOSFETs are used to drive each of the four output phases of the NCP5381.

NCP5381MNR2G is available in a 40-pin Pb-free QFN package. Samples are available now, with production scheduled for the first quarter of 2006. For additional information, please contact Mike Stapleton at or 602-244-5027.

The NCP5381 augments the ON Semiconductor’s existing portfolio of DDR controllers, general purpose controllers, MOSFETs and discrete products for computing applications. For additional information about all of ON Semiconductor’s devices visit

About ON Semiconductor
With its global logistics network and strong portfolio of power semiconductor devices, ON Semiconductor (Nasdaq: ONNN) is a preferred supplier of power solutions to engineers, purchasing professionals, distributors and contract manufacturers in the computer, cell phone, portable devices, automotive and industrial markets. For more information, please visit ON Semiconductor’s website at

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ON Semiconductor and the ON Semiconductor logo are registered trademarks of Semiconductor Components Industries, LLC. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders. Although the company references its website in this news release, such information on the website is not to be incorporated herein.

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onsemi (Nasdaq: ON) is driving disruptive innovations to help build a better future. With a focus on automotive and industrial end-markets, the company is accelerating change in megatrends such as vehicle electrification and safety, sustainable energy grids, industrial automation, and 5G and cloud infrastructure. With a highly differentiated and innovative product portfolio, onsemi creates intelligent power and sensing technologies that solve the world’s most complex challenges and leads the way in creating a safer, cleaner, and smarter world.


onsemi and the onsemi logo are trademarks of Semiconductor Components Industries, LLC. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders. Although the Company references its website in this news release, information on the website is not to be incorporated herein.

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