{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP2981-50DBVT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP2981-50DBVT","canonicalUrl":"https://icboms.com/texas-instruments/LP2981-50DBVT","factsUrl":"https://icboms.com/api/mcp/products/LP2981-50DBVT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP2981-50DBVT LDO, fixed 5V output, 100mA, SOT-23-5, 63dB PSRR at 1kHz, 0.37V dropout max, -40°C to 125°C.","salesMarkdown":"## Fixed 5V rail for noise-sensitive analog supplies The LP2981-50DBVT is a fixed 5V output LDO from Texas Instruments, delivering 100 mA from a SOT-23-5 package. Its 63 dB PSRR at 1 kHz makes it a strong candidate for cleaning up a 5V rail feeding analog front-ends, ADCs, or sensor bias circuits where ripple from a switching pre-regulator needs suppression. Maximum dropout is 0.37 V at full load, so a 5.37 V input rail is enough to keep the output in regulation across the full 100 mA range. The 95 µA quiescent current is moderate for a 100 mA LDO — not micropower, but low enough to avoid thermal issues in the SOT-23-5 footprint at moderate loads. ## Package, pinout, and board-fit considerations The LP2981-50DBVT comes in the SOT-23-5 (SC-74A) package — five pins, 0.95 mm pitch, 2.9 mm body. The Enable pin (active high) lets the system power down the regulator to near-zero draw when the 5V rail is not needed. Protection features include over-current, over-temperature, and short-circuit shutdown, all integrated. Input voltage range extends to 16 V, giving headroom for 12 V or 9 V rails. The part is ROHS3 compliant.","metaTitle":"Texas Instruments LP2981-50DBVT LDO, 5V Fixed, 100mA","metaDescription":"Texas Instruments LP2981-50DBVT 5V fixed-output LDO, 100mA, 63dB PSRR at 1kHz, 0.37V dropout max. Active production, ROHS3 compliant. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"PSRR":"63dB (1kHz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"SC-74A, SOT-753","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"100mA","Protection Features":"Over Current, Over Temperature, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C","Voltage - Input (Max)":"16V","Voltage Dropout (Max)":"0.37V @ 100mA","Current - Supply (Max)":"1.7 mA","Supplier Device Package":"SOT-23-5","Current - Quiescent (Iq)":"95 µA","Voltage - Output (Min/Fixed)":"5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.08","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.08000","currency":"USD"},{"qty":10,"price":"$0.96900","currency":"USD"},{"qty":25,"price":"$0.92000","currency":"USD"},{"qty":100,"price":"$0.75580","currency":"USD"},{"qty":250,"price":"$0.70648","currency":"USD"},{"qty":500,"price":"$0.62434","currency":"USD"},{"qty":1250,"price":"$0.49290","currency":"USD"},{"qty":2500,"price":"$0.46500","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/7099224a9bdeeed01543bc56504c3b65.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What does the 63 dB PSRR rating mean for my design?","answer":"63 dB PSRR at 1 kHz means the output ripple is attenuated by a factor of roughly 1400 relative to the input ripple at that frequency. For a 100 mVpp switching ripple on the input, the output sees about 70 µVpp at 1 kHz — clean enough for many 10- to 12-bit ADC supplies."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP2981-50DBVT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LP2981-50DBVT 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}}