April 4, 2001 - Offering the best mix of performance, price and functionality, National Semiconductor Corporation (NYSE: NSM) today announced two highly integrated power management controllers for today's complex embedded computer applications. These products offer a complete power supply for any microprocessor, FPGA or DSP-based system in one compact device. National's new high-efficiency synchronous step-down regulator controllers have multiple outputs that can power notebook computers, networking equipment, internet appliances, set-top boxes, graphics cards including DDR memory, and industrial computer boards.
The LM2633 and LM2645 combine all the blocks needed to create a PCB-level power supply that can operate over an input range of 4.5V to 30V with maximum efficiency. With their wide input voltage range, 10?A shutdown current, and superior performance, these controllers meet the needs of portable and line-powered systems.
"Multiple IC process technologies dictate more and varied power sources in computer-based system design," said John Perzow, National's business marketing manager for power management products. "National is the only company that combines this level of functionality and performance into one competitively-priced package."
The LM2633 combines two switching controllers and a linear controller. The LM2645 combines all the features of the LM2633 plus a 3.3V/50mA linear regulator. The synchronous switching controllers can operate out of phase, thereby decreasing the input peak current. This technique results in significant cost savings by reducing the number of capacitors required to operate this supply. The two switching channels can also operate in parallel to create a 2-phase controller for higher power density and lower system noise. A low-current 3.3V linear regulator and an adjustable linear controller provide the additional voltages for standby, bias or any other system need.
National offers free on-line power management product selection and simulation tools as well as thermal simulation capability. As a world leader in power management technology, National provides real world solutions that shorten design cycle, and speed customers' time to market. For innovative power solutions from National, visit: www.national.com/appinfo/power/webench/.
Pricing, Packaging and Availability
The LM2633MTD and the LM2645 are offered in National's 48-pin TSSOP, and are priced at $4.25 each in quantities of 1,000. For more information on the LM2633/45, visit http://www.national.com/pf/LM/LM2633.html or http://www.national.com/pf/LM/LM2645.html.
About National Semiconductor
National Semiconductor is the premier analog company driving the information age. Combining real-world analog and state-of-the-art digital technology, the company is focused on the fast growing markets for wireless handsets; information appliances; information infrastructure; and display, imaging and human interface technologies. With headquarters in Santa Clara, California, National reported sales of $2.1 billion for its last fiscal year and has about 10,500 employees worldwide. Additional company and product information is available on the World Wide Web at www.national.com.
