Allegro MicroSystems, LLC Introduces New Buck/Boost Controller With Integrated Buck MOSFET

August 9, 2016

A4450 Product image

Allegro MicroSystems, LLC introduces a new automotive AEC-Q100 qualified power management IC.  The A4450 can implement either a buck or buck/boost regulator to efficiently convert automotive battery voltages into a tightly regulated voltage, with seamless transition between the buck and boost modes.  This new device is targeted at the automotive, industrial and instrumentation markets with end applications to include infotainment, instrument clusters, telematics, amplifiers, and control modules.

The A4450 is ideal for automotive input environments where battery input voltage supply can vary above and below the required output voltage and a single inductor / single stage conversion is desired.  The wide input operating voltage range of 3 V to 36 V makes the A4450 suitable for a range of automotive infotainment applications and handles idle stop/start, cold crank, double battery and load dump conditions. The A4450 features high-voltage battery compatible enable (EN) input to accommodate for switched battery input applications. The

A4450 provides regulated output voltage ranging from 3 V to 8 V with load current of up to 1 A DC.  The PWM switching frequency range is 250 kHz to 2.4 MHz, and frequency dithering and controlled switching transitions minimize EMI. The A4450 maintains excellent stability even when the input and output voltages are at nearly the same level as well as through line and load transient events.

Protection features include pulse-by-pulse current limit, hiccup mode short-circuit protection,

LX short-circuit protection, missing freewheeling diode (buck diode at LX node in A4450). The enable input is compatible to a high-voltage battery level, and a power-on reset output (NPOR) is integrated.

The device is available in a 20-lead, 4 mm x 4 mm QFN package (suffix “ES”), which is “wettable flank” and AEC-Q100 qualified.  


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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