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High-Performance Power ICs and Hall-Effect Sensors
Allegro® Introduces a New Low Voltage, Bi-Directional
DC Motor Driver in an Extremely Small 2.0 × 2.0 mm Package
High output current and wide operating voltage range ideal for portable
applications 
Worcester, MA, June 20, 2007 — Allegro® MicroSystems, Inc. introduces a new low voltage bi-directional DC motor driver with an input voltage range of 3.0 V to 5.5 V and output currents up to 500 mA. The unique output full-bridge 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*Rdson variation and battery voltage tolerance. Allegro’s new motor driver is targeted at the portable and instrumentation markets.
Logic input pins 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 A3903 is supplied in a 2.0 mm × 2.0 mm × 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. For more information on Allegro’s new low voltage motor driver, please access the following link: http://www.allegromicro.com/en/Products/Part_Numbers/3903/index.asp.
About Allegro
Allegro MicroSystems, Inc. is a global leader in developing, manufacturing and marketing of high-performance power integrated circuits and integrated Hall-effect magnetic sensors. Allegro’s innovative, system-level solutions serve high-growth applications within the automotive, computer/office automation, industrial, consumer and communications markets. With more than 2,500 employees, Allegro is headquartered in Worcester, MA. Further information about Allegro can be found at www.allegromicro.com.
Editorial Contact:
Stephanie Fennelly
Director – Marketing Communications
Tel: (508) 854-5363
sfennelly@allegromicro.com