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National Semiconductor Introduces Highly Integrated Buck Regulator with Unique, High-Frequency Control Circuitry

75 V, 1 A LM5010, in Tiny, Thermally Enhanced LLP Packaging, Well-Suited for 48 V Telecom Applications and High-Voltage Industrial Power Supply Requirements

Nov 2, 2004

November 2, 2004 - National Semiconductor Corporation (NYSE:NSM) today introduced the LM5010, a 75 V buck regulator with all the functions needed to implement an efficient power management solution capable of supplying in excess of 1 A load current.  The LM5010 complements National's LM5007, a 75 V, 0.5 A buck regulator, and integrates unique high-frequency control circuitry that enables designers to use the regulator with smaller filters and fewer external components.

"The LM5010 builds on the success of National's popular LM5000 series of power management products and expands our buck regulator offerings," said Paul Greenland, marketing director for National Semiconductor’s Power Management group.  "The LM5010's combination of small size and high-frequency operation makes it unique in the industry and gives our customers more options when selecting an ultra-small, highly integrated buck regulator for their high-voltage power supply and telecom applications."

About the LM5010
Key features of National’s LM5010 include:

  • Input voltage range of 8 V to 75 V   
  • Valley-current limit at 1.25 A typical   
  • Integrated 80 V, N-Channel buck switch   
  • Integrated startup regulator   
  • Integrated current sense resistor   
  • Constant on-time control with voltage feed-forward   
  • No loop compensation required   
  • Ultra-fast transient response, typically 5 microseconds   
  • Adjustable switching frequency up to 1 MHz   
  • Operating frequency that remains virtually constant with load and line variations   
  • Precision 2.5 V feedback reference   
  • Adjustable output voltage from 2.5 V to Vin-2 V   
  • Adjustable soft-start limits current surges and voltage over-shoot during start-up   
  • Thermal shutdown protection   
  • Available in a 4 mm by 4 mm LLP® or TSSOP package   
  • Available for simulation in National’s WEBENCH® online design tool at http://www.national.com/cgi-bin/WebenchTemplate?base_pn=LM5010

National’s Power Management Products
National Semiconductor is the number one supplier of voltage regulator and reference ICs with 12.8 percent market share, up from 11.5 percent in 2002, according to iSuppli’s 2004 voltage regulator/reference survey.  Voltage regulators and references are the largest segment in the power management market.  According to the same survey, National’s revenue in this area grew 29.7 percent in 2003 over the previous year, compared to 17.3 percent growth for the industry during the same time period.  National's innovative power management products include industry-leading distributed power, digital core and I/O power, signal-path power, and lighting management solutions, as well as power monitoring, control and reference ICs.  National's WEBENCH online design tool allows designers to create and analyze a design, and then build a prototype from a custom design kit delivered within 24 hours.  More information about National’s power management products is available at http://power.national.com
.

Pricing and Availability
Available today, the LM5010 is manufactured in National’s Greenock, Scotland, wafer fab and tested in National’s East Malacca, Malaysia, test and assembly facility.  It is priced at $1.35 each in 1K volumes.  More information about the products is available at http://www.national.com/pf/LM/LM5010.html
.  A high-resolution downloadable photo of the products is available at http://www.national.com/company/pressroom/gallery/power.html.

About National Semiconductor
National Semiconductor, the industry's premier analog company, creates high performance analog devices and subsystems.  National's leading-edge products include power management circuits, display drivers, audio and operational amplifiers, communication interface products and data conversion solutions. National's key markets include wireless handsets, displays, PCs and laptops.  The company's analog products are also optimized for numerous applications in a variety of electronics markets, including medical, automotive, industrial and test and measurement.  Headquartered in Santa Clara, California, National reported sales of $1.98 billion for fiscal 2004, which ended May 30, 2004.  Additional company and product information is available at www.national.com
.