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National Semiconductor Introduces Two New High-Performance Linear Regulators for Noise-Sensitive Applications

Sub-Bandgap, 800 mA LP3878 and LP3879 Provide Low-Noise Regulation in Medical and Measurement Devices, Power Supplies that Drive ASICs, FPGAs and DSPs

May 24, 2006

May 24, 2006 - National Semiconductor Corporation (NYSE:NSM), a worldwide power management technology leader, today introduced a family of low-noise linear regulators that provide low-noise regulation in power supplies for noise-sensitive systems.  Applications for the adjustable-output LP3878 and fixed-output LP3879 include medical instrumentation, wireless routers and power supplies used in application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) and digital signal processors (DSPs). 

Key Features of the LP3878/9
The output voltage of the LP3878 is adjustable from 1.0V to 5.5V, while the LP3879 has fixed output options of 1.0V and 1.2V.  Both products feature the following specifications:

  • 800 mA maximum continuous output current    
  • Designed for use with low-ESR ceramic capacitors for a lower solution cost compared to  tantalum capacitors, as well as reduced high-frequency noise    
  • Very low typical output noise of 18 uV, which is ideal for noise-sensitive applications    
  • Sense option that improves load regulation for distant output traces     
  • Less than 10 uA quiescent current in shutdown, which is important for portable applications     
  • Over-temperature and over-current protection to protect the regulator and the system application

About National’s Power Management Products 
National Semiconductor is the number one supplier of power management ICs with 14.1 percent market share, according to iSuppli’s 2005 voltage regulator/reference survey.  National’s power management revenue grew 37.3 percent in 2004 over the previous year, compared to 24 percent growth for the industry.  National's 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.  National's Webench® 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 National’s power management products is available at http://power.national.com.

Pricing and Availability
The LP3878, available now in 8-lead PSOP and LLP® packages, is priced at $0.85 in 1,000-unit quantities. The LP3879, is also available in 8-lead PSOP and LLP packages, is priced at $0.85 in 1,000-unit quantities. Lead-free package options are also available.  More information about these products is available at http://www.national.com/pf/LP/LP3878-ADJ.html
and http://www.national.com/pf/LP/LP3879.html

About National Semiconductor
National Semiconductor, the industry's premier analog company, creates high-value 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 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 www.national.com.