{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2931D-R","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"LM2931D-R","canonicalUrl":"https://icboms.com/stmicroelectronics/LM2931D-R","factsUrl":"https://icboms.com/api/mcp/products/LM2931D-R","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2931D-R, adjustable positive LDO regulator, 100 mA output, 80 dB PSRR (120 Hz), 0.6 V dropout max, 2.5 V to 25.4 V output range, SOIC-8, -40°C to 125°C.","salesMarkdown":"## Adjustable LDO for noise-sensitive rails The LM2931D-R is a single-output, adjustable positive LDO regulator from Texas Instruments, delivering up to 100 mA. Its 80 dB PSRR at 120 Hz makes it a strong candidate for cleaning up supply ripple on analog or mixed-signal boards — the kind of rail that powers an op-amp front-end or a reference buffer where line-frequency hum would otherwise couple into the signal path. ## Dropout voltage and headroom planning Maximum dropout is 0.6 V at the full 100 mA load. The input rail must stay at least 0.6 V above the programmed output voltage to keep the pass element in regulation. One part number covers multiple rails on the same BOM — useful when a design needs different output voltages from a common LDO footprint, as long as the input voltage stays below the 26 V absolute maximum. ## Temperature range and protection features On-chip current limit and thermal shutdown protect the regulator and downstream circuitry during a sustained overload or a short to ground. ## Obsolete — sourcing through independent distribution Texas Instruments lists the LM2931D-R as obsolete. No official successor or pin-compatible replacement is recorded on the product status line.","metaTitle":"LM2931D-R LDO Regulator, 100 mA, Adjustable, 80 dB PSRR","metaDescription":"LM2931D-R adjustable LDO regulator, 100 mA output, 80 dB PSRR at 120 Hz, 0.6 V dropout. SOIC-8, -40°C to 125°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"STMicroelectronics","PSRR":"80dB (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":"Obsolete","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"100mA","Base Product Number":"LM2931","Protection Features":"Current Limit, Thermal Shutdown","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)":"25.4V","Supplier Device Package":"8-SOIC","Current - Quiescent (Iq)":"1 mA","Voltage - Output (Min/Fixed)":"2.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.8800","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d36d329ebe07b2117d1cff0e49ac76c9.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between LM2931D-R and LM2931D-5.0?","answer":"The LM2931D-R is an adjustable output regulator (2.5 V to 25.4 V set by external resistors), while the LM2931D-5.0 is a fixed 5 V output version. Both share the same 100 mA current rating, 80 dB PSRR, 0.6 V dropout, and SOIC-8 package, but the fixed version has the feedback divider integrated — the feedback pin is not brought out the same way. They are not pin-compatible without a PCB layout change."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/LM2931D-R","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/LM2931D-R when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T18:37:22.912Z","lastPublished":"2026-07-16T18:37:22.912Z","indexable":true}}