{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2937ET-3.3","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2937ET-3.3","canonicalUrl":"https://icboms.com/texas-instruments/LM2937ET-3.3","factsUrl":"https://icboms.com/api/mcp/products/LM2937ET-3.3","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2937ET-3.3, 3.3V fixed-output LDO regulator, 500mA, 1V dropout at full load, TO-220-3, -40°C to 125°C, NRND.","salesMarkdown":"That means TI will continue to manufacture and supply the part for existing production runs, but it is no longer the target for new board spins. ## Dropout and headroom — the number that decides fit The dropout voltage is 1 V maximum at 500 mA output. That sets the minimum input-to-output differential: supply the input at 4.3 V or higher to keep the output regulated at 3.3 V under full load. Below that headroom the output drops out of regulation. ## Temperature grade and protection Built-in protection against over-temperature, reverse polarity, and short circuit means the regulator survives a miswired battery connection or a sustained output fault without latching up. ## Sourcing reality for an NRND part Because this is NRND, the primary channel is independent distribution rather than factory-direct. No official successor is listed, so any replacement evaluation should start with TI's current LDO portfolio.","metaTitle":"Texas Instruments LM2937ET-3.3 LDO Regulator, 3.3V Fixed","metaDescription":"Texas Instruments LM2937ET-3.3 is a 3.3V fixed-output LDO regulator rated 500mA with 1V dropout at full load. TO-220-3, -40°C to 125°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","PSRR":"-","Series":"-","Package":"Tube","Output Type":"Fixed","Mounting Type":"Through Hole","Package / Case":"TO-220-3","Product Status":"Not For New Designs","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"500mA","Base Product Number":"LM2937","Protection Features":"Over Temperature, Reverse Polarity, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C~125°C","Voltage - Input (Max)":"26V","Voltage Dropout (Max)":"1V @ 500mA","Current - Supply (Max)":"125 mA","Voltage - Output (Max)":"-","Supplier Device Package":"TO-220-3","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.9200","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/fde2ea9d87633116f7579b8ea9d1fc83.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2937ET-3.3/alternatives.json"},"ai":{"faq":[{"question":"Is LM2937ET-3.3 cross compatible with LM2937ET-5.0?","answer":"Both are the same base LM2937ET family in TO-220-3 with the same pinout — the only difference is the output voltage: 3.3 V fixed versus 5.0 V fixed. They are not drop-in replacements for each other because the output voltage differs, but the footprint and circuit topology are identical."},{"question":"Does LM2937ET-3.3 require external capacitors for stability?","answer":"Yes, like most LDO regulators, the LM2937ET-3.3 needs input and output capacitors for stability. The datasheet specifies a minimum output capacitor of 10 µF with an ESR between 0.1 Ω and 10 Ω to ensure stability over the full temperature and load range."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2937ET-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/LM2937ET-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}}