{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM317P","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"LM317P","canonicalUrl":"https://icboms.com/stmicroelectronics/LM317P","factsUrl":"https://icboms.com/api/mcp/products/LM317P","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics LM317P, adjustable positive voltage regulator, 1.5A output, 40V input max, PSRR 80dB ~ 65dB (120Hz), TO-220-3 Full Pack, active lifecycle.","salesMarkdown":"## What the PSRR rating buys you on the LM317P The LM317P delivers 80dB ~ 65dB of PSRR at 120Hz. That ripple rejection matters when the input rail carries rectified line-frequency ripple — the regulator knocks it down by a factor of 10,000 at 120Hz, so the output stays clean enough for sensitive analog loads like instrumentation amplifiers or ADC references. ## Output current and thermal budget for the TO-220FP Rated for 1.5A continuous output. At 1.5A with a 10V input-output differential, you are dissipating 15W; plan a heatsink with a thermal resistance low enough to keep the junction below 125°C. ## Input voltage range and protection features Maximum input voltage is 40V; output adjusts from 1.2V up to 37V. Built-in over-current, over-temperature, and short-circuit protection mean the regulator survives a momentary output short without external clamp diodes — useful for benchtop supplies or test jigs where the load is unpredictable. Active lifecycle status — STMicroelectronics still produces the LM317P.","metaTitle":"LM317P STMicroelectronics Adjustable Linear Regulator 1.5A","metaDescription":"LM317P adjustable positive voltage regulator, 1.5A output, 40V input max, PSRR 80dB~65dB at 120Hz. Active lifecycle, TO-220-3 Full Pack. Sourced per RFQ.","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":"Tube","Output Type":"Adjustable","Mounting Type":"Through Hole","Package / Case":"TO-220-3 Full Pack","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":"TO-220FP","Current - Quiescent (Iq)":"10 mA","Voltage - Output (Min/Fixed)":"1.2V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.4200","priceTiers":[{"qty":1,"price":"$1.42000","currency":"USD"},{"qty":10,"price":"$1.26500","currency":"USD"},{"qty":50,"price":"$1.20080","currency":"USD"},{"qty":100,"price":"$0.98630","currency":"USD"},{"qty":250,"price":"$0.92200","currency":"USD"},{"qty":500,"price":"$0.81480","currency":"USD"},{"qty":1000,"price":"$0.64327","currency":"USD"},{"qty":2500,"price":"$0.60038","currency":"USD"},{"qty":5000,"price":"$0.57037","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/babfa8fd7c14be235df0f227841adf0f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM317P/alternatives.json"},"ai":{"faq":[{"question":"How can I order the LM317P or check stock?","answer":"Submit an RFQ with your target quantity and lead-time requirement; we confirm availability and current pricing at quote time. The TO-220FP tube packaging is standard for through-hole assembly."},{"question":"Is the LM317P pin-compatible with the standard LM317?","answer":"Yes — the LM317P follows the same pinout as the standard LM317 in TO-220. The difference is the Full Pack (TO-220FP) package, which has an isolated tab. The standard LM317T has a non-isolated tab connected to the output pin. On the LM317P, the tab is electrically isolated, so you can bolt it directly to a grounded heatsink without an insulating pad."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/LM317P","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/LM317P 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}}