{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM317LZ/LFT1","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM317LZ-LFT1","canonicalUrl":"https://icboms.com/texas-instruments/LM317LZ-LFT1","factsUrl":"https://icboms.com/api/mcp/products/LM317LZ%2FLFT1","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM317LZ/LFT1, adjustable positive voltage regulator, 100 mA output, TO-226-3 / TO-92-3 package, through-hole mount, -40°C to 125°C operating range.","salesMarkdown":"## 100 mA output — the low-current LM317 for tight spaces The LM317LZ/LFT1 is the 100 mA member of the LM317 adjustable regulator family, in a TO-92-3 through-hole package. It shares the classic adjustable output architecture — set with two external resistors — but at a fraction of the current of the 1.5 A LM317T. This makes it the natural choice when the load is under 100 mA and board space or cost is the constraint. ## Ripple rejection at 120 Hz — what 80 dB ~ 65 dB means PSRR of 80 dB ~ 65 dB at 120 Hz tells you how much mains-frequency ripple the regulator knocks down. At 80 dB, a 1 Vpp ripple on the input becomes about 100 µVpp on the output — clean enough for most analog and sensor supply rails. The PSRR drops as the output voltage rises or the load current increases; the 65 dB floor is the worst-case corner. If your design feeds a precision ADC or a microphone bias, budget for this roll-off. ## Protection features — over-current, over-temperature, short-circuit Built-in over-current, over-temperature, and short-circuit protection mean the regulator survives a momentary output short or a thermal overload without external clamp diodes. The thermal shutdown threshold is typically around 150°C junction; the part cycles on and off until the fault clears. For a 100 mA part in a TO-92, this is the safety net that keeps the BOM simple.","metaTitle":"LM317LZ/LFT1 Adjustable Regulator, 100 mA, TO-92, Active","metaDescription":"LM317LZ/LFT1 adjustable positive voltage regulator, 100 mA output, TO-92-3 package, -40°C to 125°C. PSRR 80 dB ~ 65 dB at 120 Hz.","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":"Through Hole","Package / Case":"TO-226-3, TO-92-3 (TO-226AA)","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)":"40V","Voltage Dropout (Max)":"-","Voltage - Output (Max)":"37V","Supplier Device Package":"TO-92-3","Current - Quiescent (Iq)":"5 mA","Voltage - Output (Min/Fixed)":"1.2V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.8000","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/6e1b4db1f31e3d4f44355e3bccdda90e.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM317LZ%2FLFT1/alternatives.json"},"ai":{"faq":[{"question":"What is the output current of LM317LZ/LFT1?","answer":"The LM317LZ/LFT1 is rated for 100 mA output current. This is the low-current variant of the classic LM317, which normally delivers 1.5 A in the TO-220 package."},{"question":"Does LM317LZ/LFT1 need a heatsink?","answer":"At its 100 mA maximum output and typical input-output differential, the TO-92-3 package dissipates under 0.5 W in most conditions, so a heatsink is not normally required."},{"question":"Is LM317LZ/LFT1 equivalent to LM317T?","answer":"The LM317LZ/LFT1 and the LM317T share the same adjustable regulator architecture and pinout, but the LM317LZ/LFT1 is rated for 100 mA output in a TO-92-3 package, while the LM317T delivers 1.5 A in a TO-220. They are not drop-in replacements — the current rating and thermal design differ significantly."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM317LZ-LFT1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM317LZ-LFT1 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}}