{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2576T-12/LB03","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2576T-12-LB03","canonicalUrl":"https://icboms.com/texas-instruments/LM2576T-12-LB03","factsUrl":"https://icboms.com/api/mcp/products/LM2576T-12%2FLB03","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments SIMPLE SWITCHER® LM2576T-12/LB03, step-down buck regulator, fixed 12 V output, 3 A, 52 kHz switching frequency, through-hole TO-220-5 formed leads, -40°C to 125°C operating range.","salesMarkdown":"## Fixed 12 V, 3 A buck — the workhorse regulator The Texas Instruments LM2576T-12/LB03 is a SIMPLE SWITCHER® step-down buck regulator delivering a fixed 12 V output at up to 3 A from a 4 V to 40 V input rail. It uses a 52 kHz switching frequency and a simple external inductor-capacitor filter, keeping the BOM count low. The through-hole TO-220-5 formed-leads package makes it hand-solderable and easy to heatsink — a natural fit for benchtop supplies, industrial control boards, and motor-drive bias rails where a clean 12 V bus is needed. ## 3 A continuous — what the rating means for the load The 3 A output rating is the continuous current the regulator can deliver at the fixed 12 V output. For a 12 V rail powering relays, fans, or a small logic supply, budget 2.4 A continuous to keep a 20 % derating margin for thermal headroom. The 52 kHz switching frequency is low enough to avoid AM-band interference but means the inductor will be physically larger than a 200 kHz+ part — plan for a 47 µH to 100 µH shielded inductor rated for the peak current. This means TI is not actively promoting it for new projects, though it remains available for existing production runs through the independent distribution channel. For a new design, consider the pin-compatible LM2596 series as a drop-in alternative — both offer similar fixed 12 V output in the same TO-220-5 footprint. The TO-220-5 package with a tab allows bolting to a chassis or heatsink — essential for keeping the junction below 125°C at full 3 A load.","metaTitle":"LM2576T-12/LB03 SIMPLE SWITCHER® Buck Regulator, 3 A","metaDescription":"Texas Instruments LM2576T-12/LB03 SIMPLE SWITCHER® step-down regulator, 3 A output, fixed 12 V, 52 kHz, TO-220-5.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Series":"SIMPLE SWITCHER®","Package":"Tube","Function":"Step-Down","Topology":"Buck","Output Type":"Fixed","Mounting Type":"Through Hole","Package / Case":"TO-220-5 Formed Leads","Product Status":"Not For New Designs","lifecycle_stage":"eol_hot","Current - Output":"3A","Number of Outputs":"1","Base Product Number":"LM2576","Output Configuration":"Positive","Frequency - Switching":"52kHz","Operating Temperature":"-40°C~125°C(TJ)","Synchronous Rectifier":"No","Voltage - Input (Max)":"40V","Voltage - Input (Min)":"4V","Voltage - Output (Max)":"-","Supplier Device Package":"TO-220-5","Voltage - Output (Min/Fixed)":"12V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.7992","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/74e216c81e85fc39d2b33ae4761c412c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2576T-12%2FLB03/alternatives.json"},"ai":{"faq":[{"question":"Is LM2576T-12/LB03 obsolete or still active?","answer":"It is not fully obsolete but is no longer recommended for new designs. Existing production lines can still source it through independent distribution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2576T-12-LB03","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM2576T-12-LB03 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}