Product News: Controls & Controllers

Synchronous Buck Regulator offers 95% efficiency.

Press Release Summary:

Synchronous Buck Regulator offers 95% efficiency.

Mar 12, 2014 - Integrating high- and low-side MOSFETs in 3 x 3 mm QFN-16 package, 4 A microBUCK® SiP12109 offers programmable switching frequencies up to 1.5 MHz and input voltage of 4.5–15 V. Device provides adjustable output voltage down to 0.6 V with ±1% accuracy. Current-mode constant on-time architecture delivers ultra-fast transient response with minimum output capacitance. Suited for point of load regulation and 5 and 12 V rails, IC targets network processors, DSPs, FPGAs, and distributed power systems.

Original Press Release

New Vishay Intertechnology 4 A Synchronous Buck Regulator Offers Switching Frequencies to 1.5 MHz and 95 % Efficiency

Press release date: Mar 10, 2014

Integrated microBUCK® Device Provides Wide 4.5 V to 15 V Input Voltage and Adjustable Output in 3 mm by 3 mm Package

MALVERN, Pa. — Vishay Intertechnology, Inc. (NYSE: VSH) today expanded its microBUCK® family of integrated synchronous buck regulators with a new 4 A device offering high programmable switching frequencies of up to 1.5 MHz and a wide input voltage range of 4.5 V to 15 V. The Vishay Siliconix SiP12109 features integrated high- and low-side power MOSFETs in the space-saving 3 mm by 3 mm QFN-16 package, providing designers with a complete high-current solution in only 180 mm².

The high switching frequencies of the SiP12109 enable a compact design with minimal components, making the device ideal for point of load regulation and 5 V and 12 V rails in a wide range of space-constrained computing, consumer electronics, telecom, and industrial applications. Typical end products will include network processors, DSPs, FPGAs, ASICs, high-density storage cards, TVs, set-top boxes, distributed power systems, servers, and more.

The device released today provides an adjustable output voltage down to 0.6 V with ± 1 % accuracy. The integrated MOSFETs offer peak efficiency of up to 95 % while a power-saving mode improves light load efficiency, enabling high efficiencies over the entire load range. The SiP12109's current-mode constant on-time (CM-COT) architecture delivers ultra-fast transient response with minimum output capacitance and tight ripple regulation at very light loads. The architecture ensures that the regulator is stable with any capacitor type and doesn't require an ESR network for loop stability.

The SiP12109 offers a full protection feature set, including output undervoltage and overvoltage protection, thermal shutdown, input undervoltage lockout, internal soft start, and a power good indicator.

Vishay's free PowerCAD online simulation tool provides designers with a fast and convenient way to test and optimize circuits utilizing the SiP12109 or any other product in the microBUCK DC/DC family. Designers may visit to use the tool.

Samples and production quantities of the RoHS-compliant, halogen-free SiP12109 regulator are available now, with lead times of 12 weeks for larger orders. Pricing for U.S. delivery in 1,000-piece quantities starts at $0.8 each.

Vishay Intertechnology, Inc., a Fortune 1000 Company listed on the NYSE (VSH), is one of the world's largest manufacturers of discrete semiconductors (diodes, MOSFETs, and infrared optoelectronics) and passive electronic components (resistors, inductors, and capacitors). These components are used in virtually all types of electronic devices and equipment, in the industrial, computing, automotive, consumer, telecommunications, military, aerospace, power supplies, and medical markets. Vishay's product innovations, successful acquisition strategy, and "one-stop shop" service have made it a global industry leader. Vishay can be found on the Internet at

microBUCK is a registered trademark of Siliconix incorporated.