{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LMS1585ACSX-3.3/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LMS1585ACSX-3.3-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LMS1585ACSX-3.3-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LMS1585ACSX-3.3%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LMS1585ACSX-3.3/NOPB LDO voltage regulator, fixed 3.3V output, 5A, positive, single regulator, DDPAK/TO-263-3, surface mount, ROHS3 compliant.","salesMarkdown":"## 5A fixed 3.3V rail — the headline rating and the dropout headroom The LMS1585ACSX-3.3/NOPB: This is a single-output positive LDO delivering a fixed 3.3V at up to 5A continuous — enough to power a small FPGA core rail, a bank of DDR termination, or a post-switcher analog supply that needs clean voltage. A 5V rail with 5% tolerance (4.75V min) just barely clears it; a 5V rail that dips to 4.5V under transient will push the output out of spec. Input voltage maxes at 13V, so the part also works cleanly off a 12V intermediate bus — just watch the dropout headroom if the bus sags under load. ## 72 dB PSRR — why that number matters on a noise-sensitive rail The 72 dB power-supply rejection ratio at 120 Hz tells you how well this regulator attenuates ripple from a full-wave rectified input or a switching pre-regulator. 72 dB is a factor of roughly 4000:1 — a 100 mVpp ripple on the input becomes about 25 µVpp on the output at that frequency. For an analog front-end or a precision ADC reference, that keeps the noise floor low enough that the regulator itself is not the limiting element. ## Package — DDPAK/TO-263-3 and board integration The DDPAK/TO-263-3 (also called D²Pak, 3 leads plus tab) is a surface-mount power package. Without adequate copper area, the junction temperature climbs past the 125°C absolute maximum under sustained load. The part is also available in cut tape or tape-and-reel for production pick-and-place. ## Protection and operating range Built-in over-current and over-temperature protection means the regulator survives a shorted output or a thermal runaway event without latching up or failing open — it folds back current and shuts down until the die cools. The operating temperature range is 0°C to 125°C, which covers commercial and most industrial environments but not automotive under-hood or extended cold-soak below freezing. Quiescent current is 7 mA typical, with a maximum supply current of 13 mA — moderate for a 5A LDO, but worth noting if the rail is always-on in a battery-powered system where every millamp cuts standby time.","metaTitle":"Texas Instruments LMS1585ACSX-3.3/NOPB LDO, 3.3V Fixed, 5A","metaDescription":"Active LDO regulator, fixed 3.3V output, 5A continuous, 72dB PSRR at 120Hz. DDPAK/TO-263-3 package. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"PSRR":"72dB (120Hz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-263-4, D²Pak (3 Leads + Tab), TO-263AA","lifecycle_stage":"eol_hot","Current - Output":"5A","Protection Features":"Over Current, Over Temperature","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"0°C ~ 125°C","Voltage - Input (Max)":"13V","Voltage Dropout (Max)":"1.4V @ 5A","Current - Supply (Max)":"13 mA","Supplier Device Package":"DDPAK/TO-263-3","Current - Quiescent (Iq)":"7 mA","Voltage - Output (Min/Fixed)":"3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.05","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.05000","currency":"USD"},{"qty":10,"price":"$2.73700","currency":"USD"},{"qty":25,"price":"$2.58760","currency":"USD"},{"qty":100,"price":"$2.24270","currency":"USD"},{"qty":250,"price":"$2.12768","currency":"USD"},{"qty":500,"price":"$1.90916","currency":"USD"},{"qty":1000,"price":"$1.62750","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/572e56e45cd4001ba9d206baa40abb83.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LMS1585ACSX-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/LMS1585ACSX-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}}