{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2937IMP-3.3","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2937IMP-3.3","canonicalUrl":"https://icboms.com/texas-instruments/LM2937IMP-3.3","factsUrl":"https://icboms.com/api/mcp/products/LM2937IMP-3.3","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2937IMP-3.3, fixed 3.3V positive LDO regulator, 400mA output, 26V max input, SOT-223-4 surface-mount package, -40°C to 85°C operating temperature.","salesMarkdown":"## Fixed 3.3 V rail for 5V-to-3.3V drops and 12V bus regulation The LM2937IMP-3.3 is a single-output, fixed 3.3 V positive LDO regulator from Texas Instruments, delivering up to 400 mA continuous output. It accepts a 26 V max input, making it a direct drop for 5 V logic rails and a clean post-regulation stage on 12 V or 24 V industrial buses. The fixed output eliminates external resistor dividers — the BOM gets the 3.3 V rail with just input/output caps. ## 400 mA ceiling and dropout margin Output current is rated 400 mA continuous — enough for a small MCU, a few op-amps, or a sensor cluster, but not a power-hungry radio or FPGA bank. The maximum dropout voltage is 1 V at 50 mA load, so a 5 V input to 3.3 V output leaves 0.7 V headroom at full current; a 3.6 V input would be marginal. Quiescent current is 2 mA typical, reasonable for always-on rails but not ultra-low-power standby. ## NRND — plan the last-time-buy window New designs should evaluate an alternative; for current BOM lines, this is a signal to secure lifetime buy quantities or qualify a pin-compatible second source before the EOL notice arrives. ## SOT-223-4 footprint and thermal path Housed in a SOT-223-4 surface-mount package (TO-261AA equivalent), the part's thermal pad on the tab conducts heat to the PCB copper plane. Protection features — over-temperature, reverse polarity, and short-circuit — reduce the need for external clamp diodes in field wiring applications.","metaTitle":"LM2937IMP-3.3 Fixed 3.3V LDO Regulator, 400mA, SOT-223-4","metaDescription":"Texas Instruments LM2937IMP-3.3 fixed 3.3V LDO, 400mA output, 26V max input, SOT-223-4.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","PSRR":"-","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-261-4, TO-261AA","Product Status":"Not For New Designs","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"400mA","Base Product Number":"LM2937","Protection Features":"Over Temperature, Reverse Polarity, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C~85°C","Voltage - Input (Max)":"26V","Voltage Dropout (Max)":"1V @ 50mA","Current - Supply (Max)":"1.25 A","Voltage - Output (Max)":"-","Supplier Device Package":"SOT-223-4","Current - Quiescent (Iq)":"2 mA","Voltage - Output (Min/Fixed)":"3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.1500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/fde2ea9d87633116f7579b8ea9d1fc83.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2937IMP-3.3/alternatives.json"},"ai":{"faq":[{"question":"Is LM2937IMP-3.3 obsolete or discontinued?","answer":"It remains available for existing production but is on a path toward eventual EOL. Buyers should plan a last-time-buy or qualify a replacement before the phase-out completes."},{"question":"Can LM2937IMP-3.3 be used for 5V to 3.3V conversion?","answer":"Yes. With a 5 V input and 3.3 V output, the dropout margin is 1.7 V — well above the 1 V max dropout at 50 mA, so regulation holds cleanly up to the full 400 mA load."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2937IMP-3.3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM2937IMP-3.3 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}}