{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP590718QDQNRQ1","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP590718QDQNRQ1","canonicalUrl":"https://icboms.com/texas-instruments/LP590718QDQNRQ1","factsUrl":"https://icboms.com/api/mcp/products/LP590718QDQNRQ1","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP590718QDQNRQ1 Automotive AEC-Q100 LDO, fixed 1.8V output, 250mA, PSRR 90dB~60dB (100Hz~100kHz), 4-X2SON (1x1) package.","salesMarkdown":"## Fixed 1.8 V output, 250 mA LDO for noise-sensitive automotive rails The LP590718QDQNRQ1 is a fixed-output positive LDO from Texas Instruments, delivering 250 mA at 1.8 V with a maximum dropout of 0.25 V at full load. The 25 µA quiescent current keeps the part efficient in always-on modules, while the PSRR profile — 90 dB at 100 Hz rolling to 60 dB at 100 kHz — means it rejects switching regulator ripple across the audio and sensor band. ## PSRR and dropout — what they mean for the rail design PSRR is specified as 90 dB at 100 Hz, dropping to 60 dB at 100 kHz. That 30 dB roll-off above 10 kHz means upstream buck converter ripple at 2 MHz will see less than 30 dB of rejection — a second-stage LC filter ahead of the LDO may be needed if the noise floor must stay below 10 µV for a 24-bit ADC supply. Below that, the pass FET enters dropout and the output tracks the input minus the dropout voltage. ## Package, thermal path, and board integration The 4-XDFN exposed-pad case requires a solderable ground plane under the pad to keep RθJA within the datasheet curve — a 1x1 mm pad on a 2-layer board with 1 oz copper typically achieves 150-180°C/W junction-to-ambient, so the 250 mA load at 3.3 V input dissipates 375 mW and stays below the 125°C limit in still air. The Enable pin allows the regulator to be shut down externally; when disabled, the supply current drops to near zero, useful for power-sequencing or low-power sleep modes. ## Protection and compliance Integrated protection features include over-current, over-temperature, and short-circuit shutdown — no external sense resistors or supervisory IC needed for basic fault handling.","metaTitle":"Texas Instruments LP590718QDQNRQ1 LDO, 1.8V, 250mA, AEC-Q100","metaDescription":"TI LP590718QDQNRQ1 LDO, fixed 1.8V output, 250mA, PSRR 90dB~60dB (100Hz~100kHz), AEC-Q100, active production. Quoted to order.","metaKeywords":null},"attributes":{"series":"Automotive, AEC-Q100","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"PSRR":"90dB ~ 60dB (100Hz ~ 100kHz)","Series":"Automotive, AEC-Q100","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"4-XDFN Exposed Pad","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"250mA","Protection Features":"Over Current, Over Temperature, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C (TJ)","Voltage - Input (Max)":"5.5V","Voltage Dropout (Max)":"0.25V @ 250mA","Current - Supply (Max)":"425 µA","Supplier Device Package":"4-X2SON (1x1)","Current - Quiescent (Iq)":"25 µA","Voltage - Output (Min/Fixed)":"1.8V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.64","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.64000","currency":"USD"},{"qty":10,"price":"$0.56000","currency":"USD"},{"qty":25,"price":"$0.52560","currency":"USD"},{"qty":100,"price":"$0.42910","currency":"USD"},{"qty":250,"price":"$0.39856","currency":"USD"},{"qty":500,"price":"$0.33920","currency":"USD"},{"qty":1000,"price":"$0.27136","currency":"USD"},{"qty":3000,"price":"$0.24592","currency":"USD"},{"qty":6000,"price":"$0.24000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/c997909da443d89742c3ad3df40df9cf.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy LP590718QDQNRQ1 and how is it quoted?","answer":"Availability is verified at quote time — no stock-holding claim is made here."},{"question":"What does the PSRR spec of 90 dB ~ 60 dB (100 Hz ~ 100 kHz) mean for my circuit?","answer":"The LDO attenuates power-supply ripple by 90 dB at 100 Hz (e.g., 1 V p-p ripple becomes ~32 µV at the output) and by 60 dB at 100 kHz (1 V p-p becomes ~1 mV). Above 100 kHz the rejection continues to roll off, so high-frequency noise from a switching regulator may need additional filtering ahead of the LDO."},{"question":"What is the closest pin-compatible alternative to LP590718QDQNRQ1?","answer":"The part is a fixed 1.8 V output in a 4-X2SON package; any functional replacement would require verifying the pinout, dropout, and PSRR against the application requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP590718QDQNRQ1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LP590718QDQNRQ1 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}}