{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"L4971D013TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"L4971D013TR","canonicalUrl":"https://icboms.com/stmicroelectronics/L4971D013TR","factsUrl":"https://icboms.com/api/mcp/products/L4971D013TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics L4971D013TR, Buck (Step-Down) Switching Regulator, Adjustable Output, 1.5A, 8V to 55V Input, 16-SOIC (0.295\", 7.50mm Width), Tape & Reel.","salesMarkdown":"## Buck converter with a wide input range for industrial rails The L4971D013TR is a step-down (buck) switching regulator from STMicroelectronics, delivering up to 1.5 A continuous output from an 8 V to 55 V input rail — a range that covers standard 12 V, 24 V, and 48 V industrial supplies without a pre-regulator. The output is adjustable from a 3.3 V minimum up to 50 V, which means the same part can produce a 5 V logic rail, a 12 V auxiliary bus, or a 24 V sensor supply from the same incoming voltage. ## Switching frequency, package, and what they mean for the layout The switching frequency is set between 100 kHz and 300 kHz — low enough to keep switching losses manageable in a 1.5 A buck, but high enough that the inductor and output capacitor stay within a reasonable footprint on a standard PCB. It comes in a 16-SOIC wide-body package (0.295\" body width, 7.50 mm) with a surface-mount footprint that mates with standard SOIC-16W land patterns — no custom pad geometry needed. There is no synchronous rectifier on chip, so the design needs an external Schottky catch diode between the switch node and ground — this is typical for non-synchronous bucks in this current class and lets the designer choose the diode's Vf and thermal rating for the specific load. ## Temperature range and where it fits in a system Rated for a junction temperature from -40 °C to +150 °C, this regulator suits enclosures without active cooling — motor drives, industrial control panels, or outdoor telecom gear where the ambient inside the box can climb well above 85 °C. The output is positive and single-channel, so it is a straightforward drop-in for a non-isolated buck stage feeding a local load from a higher-voltage bus. ## Production status and compliance Fully ROHS3 compliant, so it passes the material restrictions for EU and most global markets without an exemption certificate.","metaTitle":"L4971D013TR STMicroelectronics Buck Regulator, 1.5A","metaDescription":"L4971D013TR STMicroelectronics step-down buck regulator. 1.5A output, 8-55V input, adjustable output, 16-SOIC. Active production, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Step-Down","Topology":"Buck","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"16-SOIC (0.295\\\", 7.50mm Width)","lifecycle_stage":"eol_hot","Current - Output":"1.5A","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"100kHz ~ 300kHz","Operating Temperature":"-40°C ~ 150°C (TJ)","Synchronous Rectifier":"No","Voltage - Input (Max)":"55V","Voltage - Input (Min)":"8V","Voltage - Output (Max)":"50V","Supplier Device Package":"16-SO W","Voltage - Output (Min/Fixed)":"3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.12","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$4.12000","currency":"USD"},{"qty":10,"price":"$3.70400","currency":"USD"},{"qty":25,"price":"$3.50200","currency":"USD"},{"qty":100,"price":"$3.03520","currency":"USD"},{"qty":250,"price":"$2.87956","currency":"USD"},{"qty":500,"price":"$2.58380","currency":"USD"},{"qty":1000,"price":"$2.17912","currency":"USD"},{"qty":2000,"price":"$2.07016","currency":"USD"},{"qty":5000,"price":"$1.99233","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/5a925d4f1244d72791da1ad05e3ed9bf.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/L4971D013TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/L4971D013TR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}