{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM317MDT-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"LM317MDT-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/LM317MDT-TR","factsUrl":"https://icboms.com/api/mcp/products/LM317MDT-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics LM317MDT-TR, adjustable positive voltage regulator, 500 mA output, 40 V max input, 1.2 V to 37 V output range, DPAK surface-mount package, active production.","salesMarkdown":"## Adjustable 1.2 V to 37 V rail — 500 mA ceiling in DPAK The LM317MDT-TR is an adjustable positive voltage regulator from STMicroelectronics, delivering up to 500 mA output with an input range up to 40 V and an adjustable output from 1.2 V up to 37 V. ## PSRR 80 dB down to 65 dB — ripple rejection across the audio band PSRR is specified at 80 dB typical at 120 Hz, dropping to 65 dB at higher frequencies. The 10 mA quiescent current is typical for a three-terminal adjustable regulator of this era. ## Active status — no obsolescence watch The DPAK package variant is used in industrial and appliance power supplies. For BOM planning, the base number LM317 has multiple package derivatives — the DPAK version is the surface-mount workhorse for moderate current. ## Over-current, over-temperature, short-circuit protection — built-in The regulator includes over-current, over-temperature, and short-circuit protection. These are fold-back type — the output current reduces when the junction exceeds the thermal limit, then recovers when it cools. In a fault condition the part survives indefinitely, but the load sees repeated on-off cycles.","metaTitle":"LM317MDT-TR — STMicroelectronics Adjustable Positive","metaDescription":"LM317MDT-TR adjustable positive voltage regulator, 500 mA output, 40 V input max, PSRR 80dB~65dB at 120 Hz. Active production, ROHS3, DPAK surface-mount.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"STMicroelectronics","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)":"40V","Voltage Dropout (Max)":"-","Voltage - Output (Max)":"37V","Supplier Device Package":"DPAK","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"1.2V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.26285","priceTiers":[{"qty":5,"price":"$0.26285","currency":"USD"},{"qty":50,"price":"$0.20787","currency":"USD"},{"qty":150,"price":"$0.18103","currency":"USD"},{"qty":500,"price":"$0.15702","currency":"USD"},{"qty":2500,"price":"$0.15040","currency":"USD"},{"qty":5000,"price":"$0.14650","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/3ba6aedfc4fcb1e491f9ef61b4ee7c10.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM317MDT-TR/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to LM317MDT-TR?","answer":"The LM317MDT-TR is the DPAK surface-mount variant of the classic LM317 adjustable regulator. Pin-compatible alternatives include the LM317M (500 mA) and LM317 (1.5 A) in the same TO-252 package from other manufacturers, but the output current and thermal performance differ — confirm the load current and board copper before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/LM317MDT-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/LM317MDT-TR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-13T09:45:44.390Z","lastPublished":"2026-08-13T09:45:44.390Z","indexable":true}}