National Semiconductor Combines Multiple Synchronous and Linear Power Controllers on a Single IC

New Offerings Provide Optimal Power Management Solutions For

Computer-Based Systems



Apr 04, 2001, 01:00 ET from National Semiconductor Corporation

    SANTA CLARA, Calif., April 4 /PRNewswire/ -- 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, 10micronA 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, or contact National's Design
 Support Group at 800-272-9959.
 
     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.
 
 

SOURCE National Semiconductor Corporation
    SANTA CLARA, Calif., April 4 /PRNewswire/ -- 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, 10micronA 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, or contact National's Design
 Support Group at 800-272-9959.
 
     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.
 
 SOURCE  National Semiconductor Corporation