Organization and Basis of Presentation	9 Months Ended
Organization and Basis of Presentation	Oct. 26, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Presentation	Organization and Basis of Presentation Nature of Business Semtech Corporation (together with its consolidated subsidiaries, the "Company" or "Semtech") is a leading provider of high-performance semiconductor, Internet of Things ("IoT") systems and cloud connectivity service solutions. The end customers for the Company's silicon solutions are primarily original equipment manufacturers that produce and sell technology solutions. The Company's IoT module, router, gateway and managed connectivity solutions ship to IoT device makers and enterprises to provide IoT connectivity to end devices. The Company designs, develops, manufactures and markets a diverse portfolio of products for commercial applications, addressing the global infrastructure, high-end consumer and industrial end markets. Basis of Presentation The Company reports results on the basis of 52 and 53-week periods and ends its fiscal year on the last Sunday in January. The other quarters generally end on the last Sunday of April, July and October. All quarters consist of 13 weeks except for one 14-week period in the fourth quarter of 53-week years. The third quarter of fiscal years 2026 and 2025 each consisted of 13 weeks. Certain reclassifications within the Statements of Operations (as defined and described below) have been made to prior period amounts to conform to current period presentation, with no impact to the Company's gross profit, operating income, net income or earnings per share for any historical periods and no impact to the Balance Sheets or Statements of Cash Flows (as defined and described below). Principles of Consolidation The accompanying interim unaudited condensed consolidated financial statements include the accounts of the Company and its majority-owned subsidiaries and have been prepared in accordance with generally accepted accounting principles in the United States ("GAAP") and on the same basis as the audited consolidated financial statements included in the Company's Annual Report on Form 10-K for the fiscal year ended January 26, 2025 ("Annual Report"). The Company's interim unaudited condensed consolidated statements of operations are referred to herein as the "Statements of Operations," the Company's interim unaudited condensed consolidated balance sheets are referred to herein as the "Balance Sheets," and the Company's interim unaudited condensed consolidated statements of cash flows are referred to herein as the "Statements of Cash Flows." In the opinion of the Company, these interim unaudited condensed consolidated financial statements contain all adjustments (consisting of normal recurring adjustments) necessary to present fairly, in all material respects, the financial position and results of operations of the Company for the interim periods presented. All intercompany balances have been eliminated. Because the interim unaudited condensed consolidated financial statements do not include all of the information and notes required by GAAP for a complete set of consolidated financial statements, they should be read in conjunction with the audited consolidated financial statements and notes included in the Company's Annual Report. The results reported in these interim unaudited condensed consolidated financial statements should not be regarded as indicative of results that may be expected for any subsequent period or for the entire year. Use of Estimates The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Recent Accounting Pronouncements In September 2025, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2025-06, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software, which removes all references to prescriptive and sequential software development stages, or "project stages", throughout Subtopic 350-40, and instead specifies that an entity is required to start capitalizing software costs when management has authorized and committed to funding the software project and it is probable that the project will be completed and the software will be used to perform the function intended. The amendments are effective for the Company for annual reporting periods beginning after December 15, 2027, and interim periods within those annual reporting periods. Early adoption is permitted. ASU 2025-06 may be applied using the prospective, modified, or retrospective transition methods. The Company is currently evaluating the impact of this guidance on its consolidated financial statements. In July 2025, the FASB issued ASU 2025-05, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets, which allows public business entities a practical expedient. Under this practical expedient, an entity is allowed to assume that the current conditions it has applied in determining credit loss allowances for current accounts receivable and current contract assets remain unchanged for the remaining life of those assets. ASU 2025-05 is effective for the Company for fiscal years beginning after December 15, 2025, and interim reporting periods in those years. Early adoption is permitted in both interim and annual reporting periods in which financial statements have not yet been issued or made available for issuance. Entities that elect the practical expedient are required to apply the amendments prospectively. The Company is currently evaluating the impact of this guidance on its consolidated financial statements. In November 2024, the FASB issued ASU 2024-04, Debt—Debt with Conversion and Other Options (Subtopic 470-20): Induced Conversions of Convertible Debt Instruments, which clarifies the requirements for determining whether certain settlements of convertible debt instruments should be accounted for as an induced conversion. The amendments are effective for the Company for fiscal years beginning after December 15, 2025, with early adoption permitted if the entity has also adopted ASU 2020-06. The Company early adopted ASU 2024-04 during the fiscal quarter ended October 26, 2025 on a prospective basis and applied the amendments in this ASU to the exchange of the 2027 Notes and 2028 Notes (as defined in Note 8, Long-Term Debt). Refer to Note 8, Long-Term Debt for further details. In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, which requires public business entities to expand disclosures about specific expense categories. The amendments in this ASU require a public entity to disclose, in tabular format, in the notes to the financial statements, specific information about certain costs and expenses. Although the ASU does not change the expense captions an entity presents on the face of the income statement, it requires disaggregation of certain expense captions into specified categories. The amendments are effective for the Company for fiscal years beginning after December 15, 2026, with early adoption permitted. The Company is currently evaluating the impact of this guidance on its disclosures within its consolidated financial statements. In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which requires public business entities to disclose sufficient information to enable users of financial statements to understand the nature and magnitude of factors contributing to the difference between the effective tax rate and the statutory tax rate. The amendments in this update provide that a business entity disclose (1) a tabular income tax rate reconciliation, using both percentages and amounts, (2) separate disclosure of any individual reconciling items that are equal to or greater than 5% of the amount computed by multiplying the income (loss) from continuing operations before income taxes by the applicable statutory income tax rate, and disaggregation of certain items that are significant and (3) amount of income taxes paid (net of refunds received) disaggregated by federal, state and foreign jurisdictions, including separate disclosure of any individual jurisdictions representing greater than 5% of total income taxes paid. The amendments are effective for the Company for fiscal years beginning after December 15, 2024. Early adoption is permitted and entities may apply the amendments prospectively or may elect retrospective application. The Company is currently evaluating the impact of this guidance on its disclosures within its consolidated financial statements.