{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"L4940D2T5-TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"L4940D2T5-TR","canonicalUrl":"https://icboms.com/stmicroelectronics/L4940D2T5-TR","factsUrl":"https://icboms.com/api/mcp/products/L4940D2T5-TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics L4940 series, L4940D2T5-TR, Linear Regulator, Fixed 5V output, 1.5A, Positive, 17V max input, D2PAK-3, -40°C to 150°C.","salesMarkdown":"## 5V rail, 1.5A capability — what this LDO delivers The STMicroelectronics L4940D2T5-TR is a fixed 5V, 1.5A positive linear regulator in a D2PAK (TO-263-3) surface-mount package. It is designed for applications requiring a clean, regulated 5V rail from an unregulated DC supply up to 17V — typical in automotive ECUs, industrial control boards, and post-regulator stages in multi-rail power supplies. PSRR is 68 dB at 120 Hz, a relevant figure for rejecting rectified mains ripple in industrial power supplies. The part includes over-temperature, reverse polarity, and short-circuit protection, reducing the need for external protection diodes and crowbar circuits. No last-time-buy or obsolescence risk is indicated.","metaTitle":"STMicroelectronics L4940D2T5-TR Linear Regulator","metaDescription":"ST L4940D2T5-TR fixed 5V output, 1.5A LDO in D2PAK. PSRR 68dB at 120Hz, dropout 0.9V max at 1.5A. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"STMicroelectronics","PSRR":"68dB (120Hz)","Series":"-","Package":"Tape & Reel (TR) Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-263-3, D2PAK (2 Leads + Tab), TO-263AB","Product Status":"Active","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"1.5A","Base Product Number":"L4940","Protection Features":"Over Temperature, Reverse Polarity, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 150°C","Voltage - Input (Max)":"17V","Voltage Dropout (Max)":"0.9V @ 1.5A","Current - Supply (Max)":"50 mA","Voltage - Output (Max)":"-","Supplier Device Package":"D2PAK","Current - Quiescent (Iq)":"8 mA","Voltage - Output (Min/Fixed)":"5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.0500","priceTiers":[{"qty":1,"price":"$2.16000","currency":"USD"},{"qty":10,"price":"$1.93700","currency":"USD"},{"qty":25,"price":"$1.82720","currency":"USD"},{"qty":100,"price":"$1.55680","currency":"USD"},{"qty":250,"price":"$1.46176","currency":"USD"},{"qty":500,"price":"$1.27902","currency":"USD"},{"qty":1000,"price":"$1.20662","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/5d1f86b98937b9a0551c7b690bdb36d2.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/L4940D2T5-TR/alternatives.json"},"ai":{"faq":[{"question":"Is L4940D2T5-TR equivalent to L4940V5?","answer":"Electrically equivalent — same 5V 1.5A regulator die. The L4940V5 is the through-hole TO-220 version; the L4940D2T5-TR is the surface-mount D2PAK variant. They are not pin-compatible but serve the same function on different PCB layouts."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/L4940D2T5-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/L4940D2T5-TR 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}}