{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM317LIPK","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM317LIPK","canonicalUrl":"https://icboms.com/texas-instruments/LM317LIPK","factsUrl":"https://icboms.com/api/mcp/products/LM317LIPK","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM317LIPK, adjustable positive voltage regulator, 100 mA output, SOT-89-3 (TO-243AA) surface-mount package, PSRR 80 dB to 65 dB at 120 Hz.","salesMarkdown":"## What the PSRR rating means for your rail The LM317LIPK delivers 80 dB of ripple rejection at 120 Hz, dropping to 65 dB as frequency rises — that 80 dB floor at line frequency is the number that matters for post-rectifier smoothing. If your load pulls under 100 mA and you need a clean adjustable rail from a noisy supply, this part handles the filtering without a separate LC stage. ## Package and temperature envelope Housed in the SOT-89-3 (TO-243AA) package, this is a surface-mount regulator with a tab that carries the output — the copper area under the tab sets the thermal resistance. ## Protection and quiescent current Built-in over-current, over-temperature, and short-circuit protection cover the common fault cases without external clamp diodes. Quiescent current is 2.5 mA — not the lowest in class, but acceptable for a 100 mA regulator where the load current dominates the power budget. The base part number is LM317, and the LIPK suffix denotes the SOT-89-3 package variant.","metaTitle":"LM317LIPK Texas Instruments Adjustable 100 mA Regulator","metaDescription":"Texas Instruments LM317LIPK adjustable positive voltage regulator, 100 mA, PSRR 80 dB, SOT-89-3 package. Active production.","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":"TO-243AA","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":"-40°C~125°C","Voltage - Input (Max)":"38V","Voltage Dropout (Max)":"-","Voltage - Output (Max)":"32V","Supplier Device Package":"SOT-89-3","Current - Quiescent (Iq)":"2.5 mA","Voltage - Output (Min/Fixed)":"1.2V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.9900","priceTiers":[{"qty":1,"price":"$0.99000","currency":"USD"},{"qty":10,"price":"$0.88800","currency":"USD"},{"qty":25,"price":"$0.84280","currency":"USD"},{"qty":100,"price":"$0.69240","currency":"USD"},{"qty":250,"price":"$0.64724","currency":"USD"},{"qty":500,"price":"$0.57198","currency":"USD"},{"qty":1000,"price":"$0.45156","currency":"USD"},{"qty":2000,"price":"$0.42600","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/6e1b4db1f31e3d4f44355e3bccdda90e.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM317LIPK/alternatives.json"},"ai":{"faq":[{"question":"Is the LM317LIPK a drop-in replacement for the standard TO-220 LM317?","answer":"No — the pinout and package are different. The LM317LIPK is an SOT-89-3 surface-mount device, while the classic LM317 comes in a TO-220 through-hole package. The electrical core (adjustable output, 1.2 V reference, 100 mA rating) is the same, but the PCB footprint and thermal management are entirely different. Verify your board layout before substituting."},{"question":"What is the closest pin-compatible alternative to the LM317LIPK in the same package?","answer":"The LM317LIPK is the SOT-89-3 variant of the LM317 family. Within the same SOT-89-3 footprint, the closest functional alternative would be another adjustable positive regulator with the same pinout — for example, the AP1117 series from Diodes Incorporated or the NCP1117 series from ON Semiconductor, though those are rated for higher output current (1 A) and have a different dropout voltage. Always cross-check the pin assignment and thermal pad connection before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM317LIPK","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM317LIPK 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}}