TI Korea (CEO Kent Chon, www.ti.com/ww/kr) October 28, 2013 – TI (CEO Kent Chon) has launched the industry's first analog DC/DC step-down controller with remote bipolar junction transistor (BJT) temperature-compensated inductor current sensing that minimizes overall solution footprint for high-power point-of-load conversion. The 20V LM27403 DC/DC synchronous buck controller delivers greater than 95% efficiency from a 12V input at 25A output current, optimizing solution size and providing fast transient response for communications infrastructure, industrial, medical, and power module applications. When used with TI's award-winning WEBENCH® online design tool, this device simplifies DC/DC conversion and accelerates the design process.
(For more detailed product information and to order samples and evaluation modules, refer to http://www.ti.com/lm27403-pr-kr, watch video on how to design high-performance converters)

Temperature-compensated inductor DC resistance sensing uses low-cost BJTs to measure real-time temperature changes, improving current limit accuracy by 10%. As a result, the LM27403 maintains consistent current limit thresholds across the entire operating temperature range. By providing current limit accuracy with respect to temperature, a smaller DC/DC converter footprint can be implemented, reducing inductor over-design and allowing the use of smaller, lower-cost inductors. A demo video on temperature-compensated inductor current sensing can be viewed here.

The LM27403 provides a complete dynamic voltage solution when designed with TI's LM10011 VID (voltage identification) interface controller and 30V CSD87350Q5D synchronous buck NexFET™ power block MOSFET, adjusting core voltage (VCORE) for VID-capable processors such as TI's TMS320C6000™ power-optimized DSP and Keystone™-based multicore DSP.

Additional Features and Benefits

• Provides a wide input voltage range of 3V to 20V, converting 3.3V, 5V, and 12V input voltage rails to as low as 0.6V point-of-load (POL) with 1% accuracy
• 30ns minimum on-time feature enables high switching frequency at low duty cycle, facilitating scalability and reducing solution size
• 15ns adaptive dead time provides higher efficiency at high-frequency operation, reducing power consumption (download regulator design tool)
• Output voltage remote sense feature provides improved load regulation for high-current applications

About TI's WEBENCH Tool

The WEBENCH Designer and Architecture Component Library include more than 30,000 components from 120 manufacturers. Pricing and availability for these tools are frequently updated by TI's partners related to design optimization and production planning. Available in 8 languages, this design environment enables users to compare complete system designs and determine supply chain within minutes. Start designing for free through TI's WEBENCH Design Environment at http://www.ti.com/webench-pr.

Availability, Package and Pricing

The LM27403 synchronous buck controller is available in volume through TI and TI-authorized distributors. Offered in a 4mm x 4mm x 0.8mm, 24-pin PowerPad™ WQFN package, pricing is $1.20 at 1,000-unit quantities.

For More Information:
• Order LM27403 Evaluation Module
• Download Reference Designs for LM27403
o 1.8V/30A Synchronous Buck Converter (4.5V to 20V input)
o 0.9V/30A Synchronous Buck Converter (12V input)
o 0.9V/45A Single-Phase Synchronous Buck Converter (12V input)
• Verify solutions and ask questions, share knowledge in TI E2E™ Community Power Management Forum:
http://www.ti.com/powerforum-pr
• Design complete power management systems online using TI WEBENCH Power Designer:
• www.ti.com/webenchpwr-pr
• Download power reference designs from TI PowerLab™ Reference Design Library:
www.ti.com/powerlab-pr