{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2937ES-12/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2937ES-12-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM2937ES-12-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM2937ES-12%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2937ES-12/NOPB, fixed 12V LDO voltage regulator, 500mA output, 26V max input, 1V dropout at 50mA, DDPAK/TO-263-3 package, -40°C to 125°C operating temperature.","salesMarkdown":"## Fixed 12V rail, 500mA — what it handles The LM2937ES-12/NOPB: It takes an unregulated DC input up to 26V and drops it to a clean 12V rail, with a maximum dropout of 1V at 50mA load — meaning it needs at least 13V in to hold regulation at light loads. The 2 mA quiescent current is modest for a 500mA part; the 20 mA supply-max figure covers the pass-element drive during transient events. ## Where it sits on the board The part comes in a DDPAK/TO-263-3 surface-mount package — essentially a TO-220 with the leads formed for reflow. The exposed tab on the bottom is the output (pin 2 in the standard TO-263 pinout), so the PCB copper pour under the tab doubles as the output node and the thermal path. For 500mA continuous at high input-to-output differential, that tab needs a decent copper area — 1 square inch of 2-oz copper keeps the junction below the 125°C limit in still air. ## Protection set — keeps the rail alive Built-in over-temperature shutdown, reverse polarity protection, and short-circuit current limiting mean the LM2937ES-12/NOPB handles the common fault conditions on a 12V rail without external clamp diodes or crowbar circuits. Reverse polarity protection is a real plus for battery-powered or field-wired gear where the input leads get swapped. The short-circuit protection folds back the output current, so a dead short on the 12V rail doesn't cook the regulator or the board trace.","metaTitle":"LM2937ES-12/NOPB LDO Regulator, Fixed 12V, 500mA, TO-263-3","metaDescription":"Texas Instruments LM2937ES-12/NOPB is a fixed 12V LDO voltage regulator rated for 500mA output. Industrial temp range -40°C to 125°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","PSRR":"-","Series":"-","Package":"Tube","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-263-4, D²Pak (3 Leads + Tab), TO-263AA","Product Status":"Active","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":"DDPAK/TO-263-3","Current - Quiescent (Iq)":"2 mA","Voltage - Output (Min/Fixed)":"12V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.9600","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/fa0d88b5b31623656f74345e6f33b73f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2937ES-12%2FNOPB/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2937ES-12-NOPB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM2937ES-12-NOPB 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}}