{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM317LD13TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"LM317LD13TR","canonicalUrl":"https://icboms.com/stmicroelectronics/LM317LD13TR","factsUrl":"https://icboms.com/api/mcp/products/LM317LD13TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics LM317LD13TR, adjustable positive voltage regulator, 100 mA output, 1.2 V to 37 V range, 40 V max input, 8-SOIC surface-mount package, active production.","salesMarkdown":"## What rail range does this part cover? The LM317LD13TR is an adjustable positive linear regulator from STMicroelectronics that delivers 100 mA output from a 1.2 V minimum up to 37 V maximum, supplied by a 40 V maximum input rail. That range spans the common analog supply voltages — 3.3 V, 5 V, 12 V, 24 V — from a single regulator, which simplifies BOM consolidation for mixed-voltage boards. ## PSRR and ripple rejection — what the 80 dB figure means The PSRR is specified at 80 dB typical falling to 65 dB, both at 120 Hz — the fundamental of full-wave rectified mains. This tells you the regulator attenuates 100/120 Hz ripple by a factor of 10,000 to 1,800, which is the margin that keeps a sensitive analog front-end (audio, measurement bridge) clean of hum. At 120 Hz, the 80 dB figure is meaningful for designs where the unregulated input carries significant residual ripple from a linear transformer supply. For switching pre-regulators the ripple frequency is higher, and this IC's PSRR typically rolls off above a few kilohertz — factor that into the noise budget. ## Protection features built in On-chip over-current, over-temperature, and short-circuit protection are included — no external clamp diode or foldback circuit required for basic fault containment. The 5 mA quiescent current is the price of the internal reference and protection; it does not vary much with load, so the no-load dissipation is predictable. Supplied in an 8-SOIC (0.154\", 3.90 mm width) surface-mount package, available on tape-and-reel or cut tape. Lifecycle status is active — STMicroelectronics lists this part as current production with ROHS3 compliance.","metaTitle":"LM317LD13TR STMicroelectronics Adjustable Positive Voltage","metaDescription":"LM317LD13TR STMicroelectronics adjustable positive voltage regulator, 1.2V to 37V output, 100mA, PSRR 80dB~65dB at 120Hz, 8-SOIC package.","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":"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)":"40V","Voltage Dropout (Max)":"-","Voltage - Output (Max)":"37V","Supplier Device Package":"8-SOIC","Current - Quiescent (Iq)":"5 mA","Voltage - Output (Min/Fixed)":"1.2V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5600","priceTiers":[{"qty":1,"price":"$0.56000","currency":"USD"},{"qty":10,"price":"$0.47900","currency":"USD"},{"qty":25,"price":"$0.44680","currency":"USD"},{"qty":100,"price":"$0.35750","currency":"USD"},{"qty":250,"price":"$0.33192","currency":"USD"},{"qty":500,"price":"$0.28086","currency":"USD"},{"qty":1000,"price":"$0.21703","currency":"USD"},{"qty":2500,"price":"$0.19788","currency":"USD"},{"qty":5000,"price":"$0.18511","currency":"USD"},{"qty":12500,"price":"$0.17235","currency":"USD"},{"qty":25000,"price":"$0.16341","currency":"USD"},{"qty":62500,"price":"$0.15958","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/75ec130e850034dd89547ca506646904.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM317LD13TR/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for LM317LD13TR?","answer":"The LDFPVR is a different device — it is a 1 A positive adjustable regulator with a 16 V input limit and lower PSRR (62 dB to 55 dB from 120 Hz to 100 kHz). It is not a direct pin-for-pin replacement; the LM317LD13TR has a higher voltage ceiling and different protection set."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/LM317LD13TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/LM317LD13TR 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}}