{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP38691DTX-3.3/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP38691DTX-3.3-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LP38691DTX-3.3-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LP38691DTX-3.3%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP38691DTX-3.3/NOPB LDO regulator, fixed 3.3 V output, 500 mA, 55 dB PSRR at 120 Hz, TO-252-3 (DPak) surface-mount package, -40°C to 125°C.","salesMarkdown":"The LP38691DTX-3.3/NOPB is a single-output LDO that delivers a fixed 3.3 V at up to 500 mA. Power-supply rejection ratio of 55 dB at 120 Hz means the regulator attenuates full-wave-rectified ripple by a factor of roughly 560×. For a 100 mVpp ripple on the input, the output sees under 180 µVpp at that frequency — relevant when the LDO follows a bulk capacitor without a downstream LC filter. ## 55 µA quiescent current, 100 µA max supply draw For an always-on 3.3 V rail in a battery-powered device, the regulator's own draw sits well below 1 mW — negligible against the load current in most applications. ## TO-252-3 package and thermal management Over-temperature protection shuts the output down before the die exceeds its safe limit.","metaTitle":"LP38691DTX-3.3/NOPB LDO, 3.3V Fixed, 500mA, TO-252-3","metaDescription":"Texas Instruments LP38691DTX-3.3/NOPB LDO regulator, fixed 3.3V output, 500mA, 55dB PSRR at 120Hz, TO-252-3 package. Active, 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":"55dB (120Hz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-252-3, DPak (2 Leads + Tab), SC-63","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)":"0.55V @ 500mA","Current - Supply (Max)":"100 µA","Supplier Device Package":"TO-252-3","Current - Quiescent (Iq)":"55 µA","Voltage - Output (Min/Fixed)":"3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.18","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.18000","currency":"USD"},{"qty":10,"price":"$1.95500","currency":"USD"},{"qty":25,"price":"$1.84440","currency":"USD"},{"qty":100,"price":"$1.57140","currency":"USD"},{"qty":250,"price":"$1.47552","currency":"USD"},{"qty":500,"price":"$1.29108","currency":"USD"},{"qty":1000,"price":"$1.06975","currency":"USD"},{"qty":2500,"price":"$1.04400","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/646e217adc5eed5fb5e0b93776e1ee3e.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What protection features does LP38691DTX-3.3/NOPB include?","answer":"The regulator includes over-temperature protection that shuts down the output if the die temperature exceeds the safe operating limit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP38691DTX-3.3-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/LP38691DTX-3.3-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}}