{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MIC2940A-12WU","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"MIC2940A-12WU","canonicalUrl":"https://icboms.com/microchip/MIC2940A-12WU","factsUrl":"https://icboms.com/api/mcp/products/MIC2940A-12WU","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology MIC2940A-12WU linear regulator, fixed 12 V output, 1.25 A, TO-263-3 (D2PAK) surface-mount package, -40°C to 125°C operating range.","salesMarkdown":"## Fixed 12 V rail — dropout and thermal budget The MIC2940A-12WU: Output is fixed at 12 V with a single regulator — no external resistor divider or adjust pin, which simplifies the BOM and eliminates a feedback-node noise path. At lower currents the dropout drops proportionally, but the 0.6 V ceiling governs the headroom budget. Without adequate pad area, the junction temperature will exceed the 125°C absolute maximum at full current in a 25°C ambient. ## Protection and quiescent draw Built-in over-current, over-temperature, and reverse-polarity protection means the regulator survives output shorts, thermal runaway, and a swapped supply connection without external clamp diodes or crowbar circuits. Quiescent current is 500 µA typical — for always-on rails in battery-backed or standby systems, this draw is low enough to avoid a separate low-Iq LDO for the keep-alive supply. Maximum supply current is 70 mA — this is the regulator's own consumption under fault or start-up conditions, not the load current. The 1.25 A output rating is the load capacity. ## Temperature grade and package fit An engine-bay ECU or outdoor industrial controller that sees 105°C ambient still has 20°C of junction margin before the thermal shutdown trips. The TO-263-3 (D2PAK) surface-mount package has three leads plus the exposed tab, which is the thermal path. The tab is electrically connected to the output — the PCB copper pour must be isolated from other nets unless the output rail can share the plane. Shipping in Tube format — not tape-and-reel — so the pick-and-place feeder setup differs from reel-fed parts. Confirm the tube-to-reel transfer with your CM if the line is set up for tape.","metaTitle":"MIC2940A-12WU LDO Regulator, 12V Fixed, 1.25A","metaDescription":"Microchip MIC2940A-12WU linear regulator, fixed 12V output, 1.25A, 0.6V dropout, TO-263-3. Active production, ROHS3 compliant. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tube","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-263-4, D2PAK (3 Leads + Tab), TO-263AA","lifecycle_stage":"eol_hot","Current - Output":"1.25A","Protection Features":"Over Current, Over Temperature, Reverse Polarity","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C","Voltage - Input (Max)":"26V","Voltage Dropout (Max)":"0.6V @ 1.25A","Current - Supply (Max)":"70 mA","Supplier Device Package":"TO-263-3","Current - Quiescent (Iq)":"500 µA","Voltage - Output (Min/Fixed)":"12V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.05","priceTiers":[{"qty":1,"price":"$3.05000","currency":"USD"},{"qty":25,"price":"$2.53000","currency":"USD"},{"qty":100,"price":"$2.31000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/6f162927085d6f74f98e2064f116c35a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/MIC2940A-12WU/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/MIC2940A-12WU","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/MIC2940A-12WU when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}