{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM317KTTR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM317KTTR","canonicalUrl":"https://icboms.com/texas-instruments/LM317KTTR","factsUrl":"https://icboms.com/api/mcp/products/LM317KTTR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM317KTTR adjustable positive voltage regulator, 1.5 A output, 40 V input max, 37 V output max, 80 dB ~ 65 dB PSRR at 120 Hz, TO-263-3 DDPAK surface mount, 0°C to 125°C.","salesMarkdown":"## Adjustable 1.5 A regulator in DDPAK The Texas Instruments LM317KTTR is a three-terminal adjustable positive voltage regulator delivering up to 1.5 A output current with an output adjustable from 1.25 V to 37 V. Input voltage range extends to 40 V maximum. ## 80 dB PSRR — ripple rejection for analog loads PSRR is specified at 80 dB typical at 120 Hz, rolling off to 65 dB at the same frequency. This 120 Hz rejection directly attenuates full-wave-rectified mains ripple, which makes the LM317KTTR a natural fit for powering op-amp rails, ADC reference buffers, or audio preamp stages where supply noise couples into the signal path. The 10 mA quiescent current is typical for this regulator class — not a low-Iq part, so it is best biased with a minimum load to maintain regulation. The LM317KTTR remains a standard catalog item, qualified for new designs and repeat production orders.","metaTitle":"LM317KTTR Adjustable Voltage Regulator, 1.5 A, TO-263","metaDescription":"LM317KTTR adjustable positive voltage regulator, 1.5 A output, 40 V input max, 80 dB PSRR at 120 Hz. TO-263-3 DDPAK 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-263-4, D²Pak (3 Leads + Tab), TO-263AA","Product Status":"Active","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"1.5A","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)":"40V","Voltage Dropout (Max)":"-","Voltage - Output (Max)":"37V","Supplier Device Package":"DDPAK/TO-263-3","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"1.25V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.8800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/6e4aef63b3328a11f0a16987811b26d6.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM317KTTR/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between LM317KTTR and LM317T?","answer":"The LM317KTTR is the surface-mount DDPAK/TO-263-3 variant, while the LM317T is the through-hole TO-220 package. Electrical specifications — 1.5 A output, 40 V input max, 1.25 V to 37 V output range, PSRR, and protection features — are common across the LM317 family. The package choice depends on the assembly process and thermal management approach."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM317KTTR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM317KTTR 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}}