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National Semiconductor Expands LM5100 Driver Family with New High-Voltage Gate Driver

Feb 2, 2005

February 2, 2005—National Semiconductor Corporation (NYSE:NSM) today announced the LM5107, a high-voltage gate driver designed to drive both the high-side and low-side N-Channel MOSFETs in a synchronous buck or a half-bridge configuration.

Derived from National’s LM5100 half-bridge driver family, the LM5107 is capable of working with rail voltages up to 100 V. Its outputs are independently controlled with TTL-compatible input thresholds and an integrated on-chip high-voltage diode is provided to charge the high-side gate drive bootstrap capacitor. A robust level shifter technology operates at high speed while consuming low power and providing clean level transitions from the control input logic to the high-side gate driver. Under-voltage lockout is provided on both the low-side and high-side power rails. The LM5107 is available in the SOIC-8 and the thermally enhanced LLP-8 packages.

Key Features of the LM5107

  • Drives both a high-side and low-side N-Channel MOSFET
  • High peak output current (1.4 A sink / 1.3 A source)
  • Independent TTL-compatible inputs
  • Integrated bootstrap diode
  • Bootstrap supply voltage to 118V DC
  • Fast propagation times (27 ns typical)
  • Drives 1000 pF load with 15 ns rise and fall times
  • Propagation delay matching of 2 ns typical
  • Supply rail under-voltage lockout
  • Low power consumption

About National’s Power Management Products
National Semiconductor is the number one supplier of power management ICs with 12.8 percent market share, according to iSuppli’s 2004 voltage regulator/reference survey.  National’s power management revenue 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 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's WEBENCH® online design tool allows designers to select a power management 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
National’s LM5107 is available now and is priced at 95 cents each in 1,000-unit quantities.

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