{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2931CT/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2931CT-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM2931CT-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM2931CT%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2931CT/NOPB adjustable positive LDO voltage regulator, 100 mA output, 0.3 V dropout max at 100 mA, 55 dB PSRR at 120 Hz, -40°C to 85°C, TO-220-5 through-hole package.","salesMarkdown":"The LM2931CT/NOPB is a single-output adjustable positive LDO regulator from Texas Instruments, delivering up to 100 mA with a maximum dropout voltage of 0.3 V at full load. That dropout figure means the input rail needs to sit only 300 mV above the set output voltage — a 3.3 V output from a 3.6 V input is fine, but a 5 V output from a 5.0 V rail leaves no headroom. The output can be adjusted from a minimum of 3 V up to 24 V using an external resistor divider. ## PSRR and protection — why this part holds up in noisy environments Ripple rejection is rated at 55 dB at 120 Hz, which is the full-wave rectifier fundamental frequency. That knocks down 1 Vpp of input ripple to about 1.8 mVpp at the output — clean enough to feed a sensitive analog front-end or a small sensor bias. On top of that, the regulator includes over-temperature shutdown, reverse-polarity protection, and short-circuit current limiting, so it survives a miswired battery connection or a momentary output short without failing. The TO-220-5 through-hole package has a metal tab that can be bolted to a heatsink or the chassis; the quiescent current is 1 mA typical, so self-heating is low, but at 100 mA output with a 5 V drop the dissipation reaches 0.5 W, and the tab keeps the junction below the thermal limit without forced air.","metaTitle":"LM2931CT/NOPB Adjustable LDO Regulator, 100 mA, TO-220-5","metaDescription":"LM2931CT/NOPB adjustable voltage regulator, 100 mA output, 0.3 V dropout, 55 dB PSRR, -40°C to 85°C, TO-220-5.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","PSRR":"55dB (120Hz)","Series":"-","Packaging":"Bulk","Output Type":"Adjustable","Part Status":"Active","Mounting Type":"Through Hole","Package / Case":"TO-220-5","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"100mA","Base Product Number":"LM2931","Protection Features":"Over Temperature, Reverse Polarity, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 85°C","Voltage - Input (Max)":"26V","Voltage Dropout (Max)":"0.3V @ 100mA","Current - Supply (Max)":"15 mA","Voltage - Output (Max)":"24V","Supplier Device Package":"TO-220-5","Current - Quiescent (Iq)":"1 mA","Voltage - Output (Min/Fixed)":"3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.4100","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/bc5f9d253d87c0f5bb975d3751d9071d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2931CT%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"Is LM2931CT/NOPB compatible with a standard TO-220 footprint?","answer":"Yes, the TO-220-5 package uses the same 0.100-inch lead pitch and 0.055-inch lead width as a standard TO-220, but with five leads instead of three. The mounting hole pattern and tab dimensions match the standard TO-220 outline, so existing heatsink brackets and hole layouts work."},{"question":"What are the protection features of LM2931CT/NOPB?","answer":"The regulator includes over-temperature shutdown, reverse-polarity protection, and output short-circuit current limiting. These allow it to survive a reversed battery connection or a sustained output short without damage."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2931CT-NOPB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM2931CT-NOPB 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}}