{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP38691SD-2.5/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP38691SD-2.5-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LP38691SD-2.5-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LP38691SD-2.5%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP38691SD-2.5/NOPB automotive AEC-Q100 linear regulator, fixed 2.5V output, 500mA, 55dB PSRR at 120Hz, 6-WDFN exposed pad, surface mount.","salesMarkdown":"## 2.5V fixed LDO for automotive and industrial rails The LP38691SD-2.5/NOPB is a single-output positive linear regulator from Texas Instruments, delivering a fixed 2.5V output at up to 500mA. The 55µA typical quiescent current keeps the regulator's own draw low enough for always-on modules in battery-backed systems. ## PSRR and noise rejection at line frequency Power supply rejection ratio is specified at 55dB at 120Hz, the fundamental ripple frequency from a full-wave rectified 60Hz mains. Input voltage range extends to 10V maximum, covering the nominal 12V automotive bus with margin for cold-crank dips down to 4.5V as long as the input stays above the dropout headroom. Over-temperature protection is built in, with no reverse-current or current-limit features — the protection is thermal-only. ## Package, footprint, and board integration The LP38691SD-2.5/NOPB comes in a 6-WDFN exposed pad package (supplier device package 6-WSON, 3x3mm). Mounting is surface mount only, with packaging options of Tape & Reel or Cut Tape for prototyping. The 6-pin footprint is compact enough for space-constrained ECU modules but requires a thermal via array under the pad for heat sinking.","metaTitle":"LP38691SD-2.5/NOPB LDO Regulator, 2.5V Fixed, 500mA","metaDescription":"Texas Instruments LP38691SD-2.5/NOPB linear regulator, 2.5V fixed output, 500mA, 55dB PSRR at 120Hz, AEC-Q100 qualified, -40 to 125°C, 6-WSON.","metaKeywords":null},"attributes":{"series":"Automotive, AEC-Q100","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"PSRR":"55dB (120Hz)","Series":"Automotive, AEC-Q100","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"6-WDFN Exposed Pad","lifecycle_stage":"eol_hot","Current - Output":"500mA","Protection Features":"Over Temperature","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C","Voltage - Input (Max)":"10V","Voltage Dropout (Max)":"0.73V @ 500mA","Current - Supply (Max)":"100 µA","Supplier Device Package":"6-WSON (3x3)","Current - Quiescent (Iq)":"55 µA","Voltage - Output (Min/Fixed)":"2.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.89","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.89000","currency":"USD"},{"qty":10,"price":"$1.69900","currency":"USD"},{"qty":25,"price":"$1.60320","currency":"USD"},{"qty":100,"price":"$1.36600","currency":"USD"},{"qty":250,"price":"$1.28260","currency":"USD"},{"qty":500,"price":"$1.12228","currency":"USD"},{"qty":1000,"price":"$0.92988","currency":"USD"},{"qty":2000,"price":"$0.90750","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/646e217adc5eed5fb5e0b93776e1ee3e.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the PSRR of LP38691SD-2.5/NOPB at 120Hz?","answer":"Power supply rejection ratio is 55dB at 120Hz, which attenuates full-wave rectified ripple from 60Hz mains by roughly 560×. This matters for post-rectifier filtering in automotive DC-DC stages feeding sensitive analog circuits."},{"question":"What compliance documentation does Texas Instruments provide for LP38691SD-2.5/NOPB?","answer":"The LP38691SD-2.5/NOPB is ROHS3 compliant. Texas Instruments provides the standard datasheet, application notes, and qualification reports for the AEC-Q100 automotive grade."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP38691SD-2.5-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/LP38691SD-2.5-NOPB 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}}