Exhibit 5.1

Silicon Valley Office  •  1755 Embarcadero Road  •  Palo Alto, California  94303

TELEPHONE: +1.650.739.3939 • FACSIMILE: +1.650.739.3900

June 22, 2020

QuickLogic Corporation

2220 Lundy Avenue

San Jose, California 95131

Re: 2,875,000 Shares of Common Stock of QuickLogic Corporation

Ladies and Gentlemen:

We are acting as counsel to QuickLogic Corporation, a Delaware corporation (the “Company”), in connection with the issuance and sale by the Company of up to 2,875,000 shares (the “Shares”) of the Company’s common stock, par value $0.001 per share (the “Common Stock”), pursuant to an Underwriting Agreement, dated as of June 18, 2020 (the “Underwriting Agreement”), by and between the Company and Oppenheimer & Co. Inc., as representative of the several underwriters named in Schedule I thereto.

In connection with the opinion expressed herein, we have examined such documents, records and matters of law as we have deemed relevant or necessary for purposes of such opinion.  Based on the foregoing, and subject to the further limitations, qualifications and assumptions set forth herein, we are of the opinion that the Shares, when issued and delivered pursuant to the terms of the Underwriting Agreement against payment of the consideration therefor as provided in the Underwriting Agreement, will be validly issued, fully paid and nonassessable.

In rendering the foregoing opinion, we have assumed that the resolutions authorizing the Company to issue, offer and sell the Common Stock will be in full force and effect at all times at which any Common Stock are offered or sold by the Company.

As to facts material to the opinions and assumptions expressed herein, we have relied upon oral or written statements and representations of officers and other representatives of the Company and others. The opinion expressed herein is limited to the laws of the State of New York and the General Corporation Law of the State of Delaware, in each case as currently in effect, and we express no opinion as to the effect of the laws of any other jurisdiction.

We hereby consent to the filing of this opinion as Exhibit 5.1 to the Current Report on Form 8-K dated the date hereof filed by the Company relating to the Company’s Registration

AMSTERDAM • ATLANTA • BEIJING • BOSTON • BRISBANE • BRUSSELS • CHICAGO • CLEVELAND • COLUMBUS • DALLAS • DETROIT
DUBAI • DÜSSELDORF • FRANKFURT • HONG KONG • HOUSTON • IRVINE • LONDON • LOS ANGELES • MADRID • MELBOURNE
MEXICO CITY • MIAMI • MILAN • MINNEAPOLIS • MOSCOW • MUNICH • NEW YORK • PARIS • PERTH • PITTSBURGH • SAN DIEGO
SAN FRANCISCO • SÃO PAULO • SAUDI ARABIA • SHANGHAI • SILICON VALLEY • SINGAPORE • SYDNEY • TAIPEI • TOKYO • WASHINGTON

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Statement on Form S-3, as amended (File No. 333-230352) (the “Registration Statement”), filed by the Company to effect the registration of the Shares under the Securities Act of 1933 (the “Act”) and to the reference to Jones Day under the caption “Legal Matters” in the prospectus supplement constituting a part of such Registration Statement.  In giving such consent, we do not thereby admit that we are included in the category of persons whose consent is required under Section 7 of the Act or the rules and regulations of the Securities and Exchange Commission promulgated thereunder.

/s/ Jones Day