About Allegro

Who we are

Allegro MicroSystems is a leader in developing high-performance power and sensing semiconductor ICs. Our innovative solutions serve high-growth applications within the automotive market, with additional focus on industrial, consumer/computing solutions.

Allegro is headquartered in Manchester, NH (USA) with design, applications, and sales support centers spread across the Americas, Europe, Japan, and Asia.

Technology & Innovation

Our years of semiconductor technology, integrated packaging, and applications specific algorithm experience have afforded us international recognition for engineering excellence, quality and innovation.

We offer:

  • Market leading magnetic sensor IC technology with a broad portfolio of innovative solutions focused on the automotive market space
  • Customized packaging solutions that incorporate magnetic circuits to simplify applications issues

  • System-On-Chip power IC capability incorporating multiple power drivers, regulators, and control logic functions

  • Proprietary BCD (Bi-polar, CMOS, DMOS) and BiCMOS wafer process technology that allows the merging of dense digital circuitry with power and or magnetic sensing (Hall-effect/xMR) structures

Allegro's Divisions

The Sensor IC group designs and develops magnetic speed and digital position sensor ICs offering contactless sensing for applications such as direction-detection, gear-tooth, speed, and position sensing for automotive, industrial, consumer, and portable electronics. Allegro’s back-biased magnetic speed sensor IC solutions have revolutionized automotive electronic systems.

The Advanced Sensor Technology group designs and develops linear, angle and current sensor ICs. Allegro offers innovative magneto-resistive AxMR and Hall-effect magnetic sensing technologies for applications such as advanced driver assistance systems, industrial automation, loT, and hybrid & electric vehicles.

The Power IC group designs and develops motor driver IC’s, switching regulators, and LED drivers for automotive applications such as electronic power steering and infotainment, as well as energy efficient computer and industrial applications.

A Global Footprint

Allegro understands that balancing our investments in R&D and manufacturing is critical to long-term success. We have recently opened new design centers in South America and Europe, and we continue to invest in new technologies and strategic wafer fabrication partnerships while also expanding our Asian manufacturing capabilities and enabling our internal wafer fab, Polar Semiconductor (PSL), through a wafer fabrication expansion and optimization project. These important activities solidify our market leadership position and ensure that we are poised to meet the needs of all customers. We are committed to manufacturing integrated circuits with the highest standards of quality, reliability and service.

Allegro Facts

  • In 1990, Sprague Semiconductors became Allegro Microsystems, providing us with over 50 years’ experience in the semiconductor industry.
  • We ship over 1.4 billion units per year, many of them into a number of safety critical and emissions control automotive applications.

  • Allegro’s global sales are balanced throughout the Americas, Europe, Japan, and Asia, with products sold primarily to original equipment manufacturers (OEMs) through a strong worldwide sales channel that includes a direct sales force, manufacturers representatives and distribution.

  • The company is IATF 16949:2016 and ISO 14001:2015 certified and has received quality awards from leading manufacturers worldwide.


Responsible Business Alliance (RBA) Supporting Member

As a Supporter Member of the Responsible Business Alliance (RBA), Allegro MicroSystems, LLC fully supports the vision and goals of the RBA:

  • Vision: A global electronics industry that creates sustainable value for workers, the environment and business.
  • Mission: Members, suppliers and stakeholders collaborate to improve working and environmental conditions through leading standards and practices.
Allegro Global Organization
Please click here to view a map of our global operations.
Magnetic Sensor IC Overview
Please click here for an overview of our Magnetic Sensor IC Portfolio.
Power IC Overview
Please click here for an overview of our Power IC Portfolio.
General Information
Phone: 603-626-2300
Fax:     603-641-5336
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