ON Semiconductor Introduces Integrated SMART HotPlug™ Circuit That Delivers Industry’s Most Robust +12-Volt Hot Swap Protection


Integrated controller and MOSFET cuts design-time of a complete hot swap solution for computing and telecom circuit board applications in half and reduces external component count by 75 percent

PCIM Europe - Nuremberg, Germany– June 7, 2005 – ON Semiconductor (NASDAQ: ONNN) today announced the expansion of its SMART HotPlug™ family with the introduction of the NIS5102 high side hot swap protection IC with built-in charge pump and accurate temperature sensing circuitry. Designed for computing and telecom applications, it combines a power MOSFET with control circuitry and thermal protection. This integrated approach simplifies implementation of vital “hot swap” protection in high availability +12 volt (V) systems and is ideal for use in distributed power systems, servers, disk arrays and powered board insertion applications.

“The common industry solution for hot swap protection of +12 V applications requires the implementation of a controller, external MOSFET and power sense resistor – often from separate suppliers - an from separate suppliers - and more than a dozen passive components,” said Barry Brinkman, ON Semiconductor product marketing manager. “In comparison, the NIS5102 - programmed with three standard chip resistors - delivers the industry’s most reliable thermal protection thanks to built-in temperature sensing circuitry.”

The NIS5102 offers designers an integrated solution for limiting inrush current generated when plugging electronic equipment into a running or “hot” system without causing interruption or damage to the system or the electronic equipment. Specifically, it is designed to allow safe insertion and removal of electronic equipment into +12 volt (V) backplanes.

While a growing number of hot-swap controllers are being introduced to the market, the NIS5102 is the only device available with a low 10 milliohm, 18 V rated integrated smart MOSFET. By integrating a smart MOSFET with a current mirror into the NIS5102 – specifically a SenseFET™ – only a fraction of the load current is sensed across the sense resistor. This eliminates the need for a larger and more expensive external power sense resistor. Temperature sensing diodes provide accurate and hassle-free thermal protection. An adjustable current limiting feature enables the designer to set the maximum inrush current from 20 Amps to less than an Amp. Under-voltage and over-voltage lockouts prevent the load from “seeing” a potentially unsafe operating voltage. This device can run at a 10 Amp continuous current with only a 0.5 in 2 copper pad and no additional heat sink or air flow.

The NIS5102 is the second integrated Smart HotPlug™ device introduced by ON Semiconductor. Last year, the NIS5101 hot swap protection device, designed for -48 volt (V) backplanes, was debuted. By the end of 2005, three additional SMART HotPlug™ devices will be launched.

For additional information, visit https://www.onsemi.com/amc .

Package and Price
The NIS5102QP1HT1G (Latch) and NIS5102QP2HT1G (Auto-Retry) are available in a 12-pin DFN Pb-free package that measures 9 mm x 9 mm. The devices are priced at $2.38 per unit in 2,000 unit quantities.

About Hot-Swap
Telecom and computing systems require a back-up power supply to assure uninterrupted service. When an operating power supply fails, it has to be swapped-out while the system is running or hot – hence the term “hot swap”. During the installation of the new power supply, a large and often destructive current surge can be produced. If the system is not protected from the inrush current, the power supply and the system may be damaged and service interrupted.

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 https://www.onsemi.com .

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About onsemi

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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