{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2937ET-12","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2937ET-12","canonicalUrl":"https://icboms.com/texas-instruments/LM2937ET-12","factsUrl":"https://icboms.com/api/mcp/products/LM2937ET-12","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2937ET-12, fixed 12V output positive LDO voltage regulator, 500mA output current, TO-220-3 through-hole package, -40°C to 125°C operating temperature, NRND lifecycle.","salesMarkdown":"The LM2937ET-12 carries a Not Recommended for New Designs (NRND) lifecycle status. This means TI is not actively marketing the part for new projects, but existing production lines can still source it through the independent distribution channel. For a BOM line already qualified to this regulator, the NRND flag is a signal to evaluate a pin-compatible second source or a drop-in replacement before the part transitions to a last-time-buy phase. ## Fixed 12 V rail at 500 mA — the load budget This is a single-output positive LDO that delivers a fixed 12 V output at up to 500 mA continuous. The 500 mA ceiling sets the load budget for the downstream circuitry — a 12 V relay bank, an analog sensor supply, or a bias rail for an op-amp chain all fit within that current envelope. The quiescent current sits at 2 mA typical, which is modest for a 500 mA-class linear regulator and keeps the no-load power dissipation low. ## Industrial temperature range and protection suite The built-in protection features include over-temperature shutdown, reverse polarity protection, and short-circuit current limiting. That protection suite reduces the need for external clamp diodes or crowbar circuits on the output rail. ## Dropout voltage and input headroom The maximum dropout voltage is specified at 1 V with a 50 mA load. The maximum input voltage is 26 V. ## TO-220-3 package — through-hole thermal management The TO-220-3 through-hole package allows the regulator to be bolted to a heatsink or chassis for thermal management. The metal tab is the output pin (Vout), so the heatsink must be electrically isolated or connected to the output rail. The three-lead layout is standard for fixed-output LDOs in this current class, making it straightforward to retrofit into an existing PCB layout that uses a TO-220 regulator.","metaTitle":"LM2937ET-12 12V Fixed 500mA LDO Regulator, TO-220-3, NRND","metaDescription":"Texas Instruments LM2937ET-12: 12V fixed output, 500mA LDO, TO-220-3, -40°C to 125°C, over-temp/short-circuit protection.","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 @ 50mA","Current - Supply (Max)":"20 mA","Voltage - Output (Max)":"-","Supplier Device Package":"TO-220-3","Current - Quiescent (Iq)":"2 mA","Voltage - Output (Min/Fixed)":"12V"}},"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-12/alternatives.json"},"ai":{"faq":[{"question":"Is LM2937ET-12 obsolete or still available?","answer":"The LM2937ET-12 is classified as Not Recommended for New Designs (NRND). It is not yet fully obsolete, but TI has signaled that it is not intended for new projects. For new designs, a pin-compatible replacement should be evaluated."},{"question":"What is LM2937ET-12's listed output type and package?","answer":"The output type is fixed positive 12 V. The package is a TO-220-3 through-hole case, supplied in tube packaging. The three leads are input, ground, and output — the standard TO-220 pinout for a fixed LDO regulator."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2937ET-12","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-12 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}}