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National Semiconductor Offers Designers a Higher-Performance Alternative to Lossy Linear Solutions for Bias Supplies up to 150 mA


LM5009 is a New 150mA, 100V Step-Down Switching Regulator

April 26, 2006 -- National Semiconductor Corporation (NYSE: NSM), a worldwide leader in power management technology, today introduced the LM5009, a monolithic step-down switching regulator with all the functions needed to implement a cost-effective, efficient power supply. Capable of driving up to a 150 mA load over a 9V- to 100V-input voltage range, this device provides an alternative to lossy linear solutions without the added complexity.

The LM5009 is ideal for use in 12V, 24V, 36V and 48V rectified AC systems, 42V automotive solutions and non-isolated AC charge-coupled supplies. It also can be used as a heat sink eliminator for a classic linear regulator and as an LED current source.

About the LM5009
The LM5009 includes the following features and benefits:

* Highly efficient operation of 93.3 percent
* An integrated 100V, 1.15-Ohm N-Channel MOSFET for component count sourcing
* Guaranteed 150 mA output current capability for easy and accurate operation
* Up to 600 kHz operation for decreased component size
* Fast transient response for improved line and load transients
* No control-loop compensation, which allows for greater ease of use
* Input voltage feed forward provides near-constant operating frequency
* 2 percent accurate 2.5V feedback from -40 degrees C to 125 degrees C
* VCC pin allows for improved efficiency at light loads
* External shutdown control for use in system management functionality
* Protection circuitry includes intelligent current limit protection and thermal shutdown

About Nationalís Power Management Products
National Semiconductor is the number one supplier of power management ICs with 14.1 percent market share, according to iSuppliís 2005 voltage regulator/reference survey. Nationalís power management revenue grew 37.3 percent in 2004 over the previous year, compared to 24 percent growth for the industry. Nationalís innovative power management products include best-in-class linear regulators; power monitoring, control and reference ICs; and switching converters, such as high-voltage ICs for DC-DC conversion, switched capacitor converters, lighting management ICs and inductive switching converters. National also offers online tools that enable power designers to select the best power management chips for their applications. Nationalís Webenchģ design tool allows designers to choose a product, create and analyze a design, and then build custom prototypes that can be delivered within 24 hours. More information about Nationalís power management products is available at

Pricing and Availability
Available now in an MSOP-8 or a thermally enhanced LLPģ package, the LM5009 is priced at $1.05 in 1,000-unit quantities. For more information about the LM5009, including how to order samples and evaluation boards, please visit

About National Semiconductor
National Semiconductor, the industryís premier analog company, creates high-value analog devices and subsystems. Nationalís leading-edge products include power management circuits, display drivers, audio and operational amplifiers, communication interface products and data conversion solutions. Nationalís key analog markets include wireless handsets, displays and a variety of broad electronics markets, including medical, automotive, industrial, and test and measurement applications. Headquartered in Santa Clara, California, National reported sales of $1.91 billion for fiscal 2005, which ended May 29, 2005. Additional company and product information is available at

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