{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2931BV50","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"LM2931BV50","canonicalUrl":"https://icboms.com/stmicroelectronics/LM2931BV50","factsUrl":"https://icboms.com/api/mcp/products/LM2931BV50","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics LM2931BV50, positive fixed 5V LDO regulator, 100 mA output, 0.6 V dropout at full load, 75 dB PSRR at 120 Hz, TO-220-3 through-hole package, -40 to 125 °C operating temperature.","salesMarkdown":"## 5 V fixed LDO — why the 75 dB PSRR matters The STMicroelectronics LM2931BV50 is a single-output positive fixed 5 V LDO regulator rated for 100 mA continuous output. Its 75 dB PSRR at 120 Hz knocks down 100/120 Hz ripple from a rectified alternator or mains supply, keeping the 5 V rail clean for analog sensors or a microcontroller's ADC reference. ## Dropout and thermal budget at 100 mA Maximum dropout is 0.6 V at the full 100 mA load, so the input can dip to 5.6 V before the output folds. The TO-220 package with its tab can shed about 2–3 W in still air; at 100 mA and a 12 V input the regulator dissipates roughly 0.7 W — well within the thermal budget even at 125 °C junction, as long as the tab is soldered to a reasonable copper area or bolted to a small heatsink. ## Obsolete — sourcing path That means new-design qualification should target a current-production pin-compatible LDO in the LM2931 family — the TO-220 footprint and pinout are shared across the series, so a drop-in alternate from ST or a second source is the practical path.","metaTitle":"STMicroelectronics LM2931BV50 LDO Regulator, 5V Fixed","metaDescription":"ST LM2931BV50 positive fixed 5V LDO regulator, 100 mA output, 75 dB PSRR at 120 Hz, TO-220 package, -40 to 125 °C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"STMicroelectronics","PSRR":"75dB (120Hz)","Series":"-","Package":"Tube","Output Type":"Fixed","Mounting Type":"Through Hole","Package / Case":"TO-220-3","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"100mA","Base Product Number":"LM2931","Protection Features":"Over Current, Over Temperature","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C~125°C(TJ)","Voltage - Input (Max)":"26V","Voltage Dropout (Max)":"0.6V @ 100mA","Current - Supply (Max)":"30 mA","Voltage - Output (Max)":"-","Supplier Device Package":"TO-220","Current - Quiescent (Iq)":"1 mA","Voltage - Output (Min/Fixed)":"5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d36d329ebe07b2117d1cff0e49ac76c9.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2931BV50/alternatives.json"},"ai":{"faq":[{"question":"Is LM2931BV50 obsolete?","answer":"Yes, the product status is Obsolete. No official successor is listed, so for new designs a current-production pin-compatible LDO in the same family should be qualified."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/LM2931BV50","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/LM2931BV50 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}}