SOURCE: Vishay Intertechnology, Inc.

Vishay Intertechnology, Inc.

March 18, 2010 11:00 ET

Vishay Releases New microBUCK™ Integrated Synchronous Buck Regulator With Wide Voltage Range to 28 V and 95 % Efficiency in Compact MLPQ 4-mm by 4-mm Package

6-A SiC414 DC/DC Converter Features Two N-Channel MOSFETs, Bootstrap Switch, Controller IC, and Fixed 5-V LDO

MALVERN, PA--(Marketwire - March 18, 2010) - Vishay Intertechnology, Inc. (NYSE: VSH) today announced a new device in the microBUCK™ family of integrated synchronous buck regulators. The 6-A SiC414 is a dc-to-dc converter solution featuring an advanced controller IC with gate drivers, two PWM-optimized n-channel MOSFETs (high and low side), and a bootstrap switch in a standalone buck regulator configuration in a space-saving MLPQ 4-mm by 4-mm 28-pin package.

The microBUCK family of products leverages Vishay's unique combination of discrete MOSFET design, IC expertise, and packaging capability to provide customers with cost-effective, high-performance integrated solutions. The resulting integrated solutions deliver a significant reduction in board space requirements. This benefits the designer by giving more space for critical system functionality.

The device released today offers a wide input voltage range of 3 V to 28 V, with minimum output voltages down 0.75 V. The regulator minimizes EMI by eliminating PCB traces, while the device's high- and low-side MOSFETs provide low on-resistance for reduced power losses and better performance.

The SiC414 offers the small form factor needed for super-compact, battery-operated portable computing. The constant-on-time controller provides superior transient response. This can reduce output filter cost for a given load regulation target. The device's ultrasonic power save mode delivers improved light-load efficiency, making it an excellent choice for CPU and GPU core voltage regulation in notebook, desktop, and server computers; set-top boxes and HDTVs; and digital consumer equipment.

The microBUCK regulator offers a high power density and improved thermal performance under the full load condition. The device provides high efficiency of 95 %, and is capable of operating with all ceramic solutions and switching frequencies up to 1 MHz. In addition, the SiC414's internal fixed LDO may be used to supply 5 V for the gate drive circuits, or it may be bypassed with an external 5-V supply for optimum efficiency and used to drive external n-channel MOSFETs or other loads.

For reliable operation and easy system integration, the device features cycle-by-cycle current limiting, an enable pin, internal soft start, under-voltage lockout, over-voltage protection, a power good output, and thermal shutdown at + 150 deg. C. The SiC414 is halogen-free according to IEC 61249-2-21I and compliant to RoHS directive 2002/95/EC.

Samples and production quantities of the new microBUCK regulator are available now, with lead times of 10 weeks for initial orders. Follow Vishay products for power management applications at

Vishay Intertechnology, Inc., a Fortune 1,000 Company listed on the NYSE (VSH), is one of the world's largest manufacturers of discrete semiconductors (diodes, rectifiers, MOSFETs, optoelectronics, and selected ICs) and passive electronic components (resistors, capacitors, inductors, sensors, and transducers). These components are used in virtually all types of electronic devices and equipment, in the industrial, computing, automotive, consumer, telecommunications, military, aerospace, and medical markets. Its product innovations, successful acquisition strategy, and "one-stop shop" service have made Vishay a global industry leader. Vishay can be found on the Internet at

microBUCK is a trademark of Siliconix incorporated.