{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM317LCDR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM317LCDR","canonicalUrl":"https://icboms.com/texas-instruments/LM317LCDR","factsUrl":"https://icboms.com/api/mcp/products/LM317LCDR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM317LCDR, adjustable positive voltage regulator, 100 mA output, 8-SOIC surface-mount package, active lifecycle.","salesMarkdown":"It accepts an input voltage up to 38 V and produces an adjustable output from 1.2 V to 32 V. The single-regulator design suits point-of-load or post-regulation stages where a fixed-output part would force a second supply rail. ## PSRR and noise rejection for sensitive loads Power-supply rejection ratio is specified at 80 dB to 65 dB at 120 Hz. The 80 dB floor at line frequency means the regulator attenuates 120 Hz ripple by a factor of 10,000; the roll-off to 65 dB at higher frequencies is typical for a three-terminal adjustable regulator. For a 5 V rail with 100 mVpp of 120 Hz ripple, the output ripple sits below 10 µVpp — adequate for most analog front-ends that do not require a post-LDO filter. ## Protection features and quiescent current Built-in protection includes over-current, over-temperature, and short-circuit shutdown. The quiescent current is 2.5 mA, which sets the minimum load requirement for regulation — the output must sink at least 2.5 mA to maintain the reference voltage. For very light loads, a preload resistor may be needed.","metaTitle":"LM317LCDR – Texas Instruments Adjustable Positive Regulator","metaDescription":"LM317LCDR from Texas Instruments: adjustable positive voltage regulator, 100 mA output, 38 V max input, PSRR 80 dB to 65 dB at 120 Hz.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","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":"8-SOIC (0.154\\\", 3.90mm Width)","Product Status":"Active","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"100mA","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","Voltage - Input (Max)":"38V","Voltage Dropout (Max)":"-","Voltage - Output (Max)":"32V","Supplier Device Package":"8-SOIC","Current - Quiescent (Iq)":"2.5 mA","Voltage - Output (Min/Fixed)":"1.2V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4900","priceTiers":[{"qty":1,"price":"$0.49000","currency":"USD"},{"qty":10,"price":"$0.42100","currency":"USD"},{"qty":25,"price":"$0.39320","currency":"USD"},{"qty":100,"price":"$0.31460","currency":"USD"},{"qty":250,"price":"$0.29212","currency":"USD"},{"qty":500,"price":"$0.24720","currency":"USD"},{"qty":1000,"price":"$0.19101","currency":"USD"},{"qty":2500,"price":"$0.17416","currency":"USD"},{"qty":5000,"price":"$0.16292","currency":"USD"},{"qty":12500,"price":"$0.15900","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/6e1b4db1f31e3d4f44355e3bccdda90e.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM317LCDR/alternatives.json"},"ai":{"faq":[{"question":"What package does the LM317LCDR come in?","answer":"It is offered in Tape & Reel (TR) and Cut Tape (CT) options."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM317LCDR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM317LCDR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}