{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP2981A-50DBVR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP2981A-50DBVR","canonicalUrl":"https://icboms.com/texas-instruments/LP2981A-50DBVR","factsUrl":"https://icboms.com/api/mcp/products/LP2981A-50DBVR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP2981A-50DBVR linear regulator, 5V fixed output, 100mA, SOT-23-5, 0.37V dropout, 63dB PSRR, -40°C to 125°C.","salesMarkdown":"## 5V fixed LDO — 100 mA ceiling, 0.37 V dropout The LP2981A-50DBVR is a single-output positive LDO from Texas Instruments, delivering a fixed 5 V at up to 100 mA. The 95 µA quiescent current sets the always-on drain — for a battery-powered sensor waking once a minute, the LDO's own draw is the floor the system sleeps on. Power-supply rejection ratio is 63 dB at 1 kHz, meaning the output ripple from a switching pre-regulator at that frequency is attenuated by a factor of roughly 1400. For an RF front-end or an analog sensor bridge powered off a noisy DC-DC rail, this LDO cleans the supply before it reaches the load. Protection features include over-current, over-temperature, and short-circuit — the part folds back rather than latching off, so a transient overload on the output doesn't require a power cycle to recover. The Enable pin lets a microcontroller gate the output, cutting the 95 µA quiescent draw to near zero in sleep mode. Operating temperature spans -40°C to 125°C, covering the industrial and under-hood automotive band. The SOT-23-5 package (SC-74A) fits a 2.9 mm × 1.6 mm footprint — board space is tight, but the thermal pad under the die carries the heat to the PCB copper pour.","metaTitle":"Texas Instruments LP2981A-50DBVR LDO, 5V Fixed, 100mA","metaDescription":"LP2981A-50DBVR from Texas Instruments — 5V fixed output LDO, 100mA, 0.37V dropout, 63dB PSRR. Active production, ROHS3. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"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":"$0.82","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.82000","currency":"USD"},{"qty":10,"price":"$0.72100","currency":"USD"},{"qty":25,"price":"$0.67680","currency":"USD"},{"qty":100,"price":"$0.55250","currency":"USD"},{"qty":250,"price":"$0.51316","currency":"USD"},{"qty":500,"price":"$0.43672","currency":"USD"},{"qty":1000,"price":"$0.34938","currency":"USD"},{"qty":3000,"price":"$0.31662","currency":"USD"},{"qty":6000,"price":"$0.30900","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/7099224a9bdeeed01543bc56504c3b65.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP2981A-50DBVR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LP2981A-50DBVR 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}}