{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM317MDTX/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM317MDTX-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM317MDTX-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM317MDTX%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM317 series adjustable positive voltage regulator, LM317MDTX/NOPB, 500 mA output, 1.25 V to 37 V range, PSRR 80 dB ~ 65 dB at 120 Hz, TO-252-3 surface-mount package, 0°C to 125°C junction temperature.","salesMarkdown":"## 500 mA adjustable rail — what it covers The Texas Instruments LM317MDTX/NOPB is a three-terminal adjustable positive voltage regulator delivering up to 500 mA output current. The output voltage is set with two external resistors over a 1.25 V to 37 V range, matching the maximum input voltage of 37 V. A single regulator channel with overcurrent, overtemperature, and short-circuit protection built in — no external clamp diodes needed for most loads. Power-supply rejection ratio is 80 dB at 120 Hz, rolling off to 65 dB at the same frequency under heavier load. That 80 dB floor means the output ripple from a full-wave-rectified mains supply is attenuated by a factor of 10,000 — enough to keep 120 Hz hum out of sensitive analog front ends. Quiescent current is 10 mA typical — the regulator burns that much just to run the internal reference and error amp, so the load budget should account for it. ## TO-252-3 surface-mount — thermal and footprint reality Housed in a TO-252-3 (DPak) with a single exposed tab on the back side. Without adequate copper area, the 500 mA output at high dropout will push the junction above the 125 °C maximum. Not rated for continuous operation below freezing or in under-hood automotive environments without qualification testing.","metaTitle":"Texas Instruments LM317MDTX/NOPB adjustable voltage","metaDescription":"Texas Instruments LM317MDTX/NOPB adjustable positive voltage regulator, 500 mA output, 1.25 V to 37 V range, PSRR 80 dB at 120 Hz, TO-252-3 surface-mount","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","PSRR":"80dB ~ 65dB (120Hz)","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"TO-252-3, DPak (2 Leads + Tab), SC-63","Product Status":"Active","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"500mA","Base Product Number":"LM317","Protection Features":"Over Current, Over Temperature, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"0°C~125°C(TJ)","Voltage - Input (Max)":"37V","Voltage Dropout (Max)":"-","Voltage - Output (Max)":"37V","Supplier Device Package":"TO-252-3","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"1.25V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.4600","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/e56db9281768e7250cecd9c037344ff0.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM317MDTX%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"What is the output current and voltage range of LM317MDTX/NOPB?","answer":"Output current is 500 mA maximum. Output voltage is adjustable from 1.25 V up to 37 V, set by two external resistors. Input voltage can go up to 37 V."},{"question":"Is LM317MDTX/NOPB the same as LM317MDT? What is the difference?","answer":"The LM317MDTX/NOPB and LM317MDT share the same die and electrical ratings. Functionally they are interchangeable. The /NOPB suffix confirms lead-free / RoHS-compliant construction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM317MDTX-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/LM317MDTX-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}}