{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP38691QSD-1.8/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP38691QSD-1.8-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LP38691QSD-1.8-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LP38691QSD-1.8%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP38691QSD-1.8/NOPB, Automotive AEC-Q100, 500 mA fixed-output LDO, 1.8 V, 55 dB PSRR at 120 Hz, 55 µA quiescent current, -40°C to 125°C, 6-WSON exposed pad.","salesMarkdown":"## What this LDO is and where it fits The Texas Instruments LP38691QSD-1.8/NOPB is a single-output, fixed 1.8 V positive linear regulator rated for 500 mA continuous output. It belongs to the Automotive, AEC-Q100 series, qualified for the -40°C to 125°C temperature range. The 55 dB PSRR at 120 Hz and 55 µA quiescent current make it a fit for noise-sensitive always-on rails in automotive ECUs, sensor modules, and infotainment controllers where a clean 1.8 V supply is needed for MCU core or analog front-end power. ## 500 mA output — what it means for the rail budget The part is rated for 500 mA continuous output at 1.8 V fixed. ## 55 µA quiescent current and 55 dB PSRR The 55 µA Iq and 55 dB PSRR at 120 Hz are the key specs for battery-backed or always-on modules. ## Package and mounting The 6-WSON (3x3 mm) package with exposed pad is a small, low-profile footprint — 3 mm on a side — that fits tight automotive PCBs. The exposed pad must be soldered to a thermal land on the board; without a via pattern under the pad, the part will hit thermal shutdown well before 500 mA at 125°C ambient. For rework, the WSON is manageable with hot air if you preheat the board and work the pad evenly — the part is small enough that a standard nozzle can cover it, but the exposed pad wicks heat fast. ## Lifecycle and sourcing The LP38691QSD-1.8/NOPB carries an Active lifecycle status from Texas Instruments. It is ROHS3 compliant. No last-time-buy notice is in effect, and the part is available for new designs and production.","metaTitle":"LP38691QSD-1.8/NOPB Automotive LDO, 500 mA, 1.8 V Fixed","metaDescription":"TI LP38691QSD-1.8/NOPB AEC-Q100 LDO: 500 mA output, 1.8 V fixed, 55 dB PSRR, -40°C to 125°C, 6-WSON. Active production.","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","Current - Supply (Max)":"100 µA","Supplier Device Package":"6-WSON (3x3)","Current - Quiescent (Iq)":"55 µA","Voltage - Output (Min/Fixed)":"1.8V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.84","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.84000","currency":"USD"},{"qty":10,"price":"$2.55100","currency":"USD"},{"qty":25,"price":"$2.40640","currency":"USD"},{"qty":100,"price":"$2.05010","currency":"USD"},{"qty":250,"price":"$1.92496","currency":"USD"},{"qty":500,"price":"$1.68434","currency":"USD"},{"qty":1000,"price":"$1.39560","currency":"USD"},{"qty":2000,"price":"$1.36200","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/aa610a71c94755e00af30b2503bba785.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is LP38691QSD-1.8/NOPB suitable for automotive designs?","answer":"Yes. The part is qualified to AEC-Q100 and rated for the -40°C to 125°C operating temperature range, which covers under-hood and engine-bay automotive environments."},{"question":"What is the output current capability of LP38691QSD-1.8/NOPB?","answer":"The regulator is rated for 500 mA continuous output current at the fixed 1.8 V output."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP38691QSD-1.8-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/LP38691QSD-1.8-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}