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National Semiconductor Introduces New DDR Termination Regulator with Thermal Protection and Shutdown Capabilities

Dec 10, 2002

Dec. 10, 2002 ? Expanding its double data rate (DDR) memory termination supply portfolio, National Semiconductor (NYSE: NSM) today introduced a new member in the high-performance linear regulator family optimized for faster budget sensitive notebook PC design.  National?s new linear regulator eliminates switching noise, improves signal integrity and reduces the total system cost by up to 60 percent, accelerating the adoption of DDR in multiple computer applications.

With the introduction of the new LP2996, National brings the same cost and space savings to the Notebook PC as the benchmark LP2995 and LP2994 DDR termination linear regulators for Desktop PCs.  Developed to meet the JEDEC Stub Series Termination Logic (SSTL-2) specifications for DDR bus termination, National?s LP2996 boasts the industry?s smallest footprint and features tailored for power sensitive notebook applications.

The new LP2996, capable of sinking and sourcing 1.5 Amps continuously, features on-chip thermal protection, a shutdown pin, a reference output for chipsets and DIMMS, and a sense pin for enhanced load regulation.  It also features independent inputs for power (PVin) and analog (AVin) rails.  ?This allows the designer to run the power circuit  from a lower voltage.  This feature is particularly useful in notebooks since the conversion from a 1.8V rail will result in lower internal power dissipation,? said Paul Greenland, Director of Marketing for National Semiconductor?s Power Management Group.  ?This feature also makes the LP2996 well suited to generate 0.9V VTT for 1.8V DDRII, the next generation of DDR SDRAMs.?

National?s DDR termination regulator family currently consisting of the LP2996, LP2994 and LP2995 devices is designed specifically to generate the active termination voltage.  This family incorporates an internal resistor divider to generate an output that is half the external reference input.  Subsequently, making this family scaleable to generate the active termination voltage for SSTL-2 (DDR), SSTL-3 and HSTL specifications.  By using a linear regulator with minimal external components and a variety of package options, the LP299X product family sets the standard for  DDR termination power supplies in the simplest, smallest and easiest manner.

Pricing, Packaging and Availability
National Semiconductor?s new LP2996 linear regulator is available now in small outline (SO-8), and leadless leadframe package (LLP-16) packages.  It is priced at $0.90 each in 1,000 units.  The LP2996 is also available in a power SO-8 package at $0.92 each in 1,000 units. 

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; displays; information infrastructure, and information appliances. With headquarters in Santa Clara, California, National reported sales of $1.5 billion for its most recent fiscal year and has about 10,000 employees worldwide. Additional company and product information is available on the World Wide Web at