Allegro MicroSystems, Inc. Introduces a New Low Voltage, Bi-Directional DC Motor Driver in an Extremely Small 2.0 ¡Á 2.0 mm Package

Worcester, MA ¨C February 19, 2009 ¡ª Allegro® introduces a new low voltage bi-directional DC motor driver with a typical input voltage range of 3.0 V to 5.5 V and output currents up to 500 mA. The unique full-bridge output incorporates source side linear operation to allow a constant voltage supply across the motor coil. This regulated output minimizes motor voltage change due to I*Rds(on) variation and battery voltage tolerance. Allegro¡¯s new motor driver is targeted at the portable and instrumentation markets.
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Two logic inputs are provided to control the motor direction of rotation, brake and standby (<500 nA supply current) modes and to allow optional PWM of the sink drivers. Internal protection circuitry includes thermal shut down, under voltage lockout, and crossover (shoot through) protection.

Allegro¡¯s A3908 is supplied in a 2.0 mm ¡Á 2.0 mm ¡Á 0.575 mm nominal, 8-lead DFN package, with exposed thermal pad (package suffix "EE"). This small footprint package is lead (Pb) free, with 100% matte tin leadframe plating.

About Allegro

Allegro MicroSystems, Inc. is a leader in developing, manufacturing and marketing high-performance power integrated circuits and integrated Hall-effect magnetic sensors. Allegro¡¯s innovative solutions serve high-growth applications within the automotive, communications, computer/office automation, consumer and industrial markets. Allegro is headquartered in Worcester, Massachusetts (USA) with design and applications centers located in North and South America, Asia, and Europe. Further information about Allegro can be found at www.allegromicro.com.

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