Allegro Microsystems, LLC Announces a New High Current Synchronous Buck Regulator with Fault and Power OK Pins

IC Design Ensures High Efficiency Operation

March 18, 2014

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Worcester, MA - Allegro MicroSystems, LLC announces a new synchronous buck converter capable of delivering high current due to low RDS(on) internal switches. Allegro’s A8672 utilizes valley current mode control, allowing very short on-times to be achieved. This makes it ideal for applications that require very low output voltages, relative to the input voltage in combination with high switching frequencies. Typical applications include servers and networking systems that require 5 V or 12 V input step down conversions at high output current.

Valley current mode control inherently provides improved transient response over traditional switcher schemes, through the use of a voltage feed-forward loop and frequency modulation during large signal load changes. The A8672 includes a comprehensive set of diagnostic flags, allowing the host platform to react to a myriad of different fault conditions. A fault output indicates when either the temperature is becoming unusually high, or a single point failure has occurred; for example, the switching node (LX) shorted to ground, or the timing resistor going open-circuit. A Power OK (POK) output is also provided after a fixed delay, to indicate when the output voltage is within regulation. The selectable pulse-by-pulse current limit avoids the requirement to oversize the inductor to cope with large fault currents.

Allegro’s A8672EEGTX-T is targeted at the industrial, consumer and computer markets and is available in a 4 mm x 5 mm, 28-contact QFN (suffix EG) with exposed pad for enhanced thermal performance.



Sobre Allegro

Allegro Microsystems, LLC es una empresa líder en el desarrollo, fabricación y comercialización de semiconductores de alto rendimiento. Las soluciones innovadoras de Allegro son útiles para aplicaciones de alto crecimiento dentro del mercado de la automoción, con enfoque adicional en la automatización de oficinas, industrial y soluciones de comunicaciones/consumo. Allegro tiene su sede en Worcester, Massachusetts (EE.UU.) con centros de diseño, aplicaciones y de soporte de ventas ubicados en todo el mundo. Más información sobre Allegro se puede encontrar en www.allegromicro.com

Allegro Microsystems Europa, con sede en Chertsey, Reino Unido, es la oficina operativa de ventas y comercialización europea, y opera una red de representantes y distribuidores en toda Europa. Allegro cuenta con centros técnicos y de marketing en Heidelberg y Hinterzarten en Alemania. Allegro también dispone de un centro de ingeniería de diseño en el centro de Edimburgo, en Escocia y un centro técnico y de marketing en Annecy en Francia.


Contactos de marketing:

Allegro MicroSystems Europe Ltd.
Tel: +33 (0) 4 50512359
Fax: +33 (0) 4 505 12083 

Email: allegroeurope@allegromicro.com
www.allegromicro.com

 

 

 

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