Power of Attorney for Brian C. White

This filing details a Power of Attorney granted by Brian C. White to specific individuals, including Sharon Briansky, Matthew Frascella, Raymond Myer, Roald Webster, and Krista Bean. The purpose of this Power of Attorney is to authorize these individuals to act as White's legal representatives in all matters related to his holdings and transactions in securities of Allegro MicroSystems, Inc. This includes preparing and executing necessary forms such as SEC Form ID, Forms 3, 4, and 5, and managing his Electronic Data Gathering and Retrieval (EDGAR) account. The attorneys-in-fact are empowered to make electronic filings with the SEC, manage EDGAR account access, and perform any other actions deemed necessary or beneficial. This Power of Attorney remains in effect until White is no longer required to file these forms or until it is revoked in writing. The filing is dated June 17, 2026.