{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP2985-33DBVRM3","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP2985-33DBVRM3","canonicalUrl":"https://icboms.com/texas-instruments/LP2985-33DBVRM3","factsUrl":"https://icboms.com/api/mcp/products/LP2985-33DBVRM3","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP2985 series LDO voltage regulator, LP2985-33DBVRM3, 150 mA output, 3.3 V fixed, 16 V input max, SOT-23-5 package, Tape & Reel.","salesMarkdown":"## 3.3 V rail for noise-sensitive loads — PSRR and dropout headroom The LP2985-33DBVRM3 is a fixed 3.3 V output LDO delivering 150 mA with a maximum dropout of 0.575 V at full load — the input rail must stay above 3.875 V to maintain regulation, which a standard 5 V supply clears with 1.125 V of headroom. PSRR spans 78 dB at 1 kHz down to 45 dB at the same frequency — this is the rejection profile for switching-regulator ripple in the 1 kHz band, typical of a poorly filtered boost converter feeding the analog rail. Quiescent current is 95 µA, so the regulator's own draw stays under 0.1 mA in light-load or shutdown scenarios — relevant for battery-backed RTC or sensor nodes that spend most of their time in idle. ## 16 V input range and protection set — wide-VIN coverage without external clamps Input voltage maxes at 16 V, so the part can be fed from a 12 V industrial bus, a 9 V battery, or a 5 V logic rail without a pre-regulator — the internal pass FET's breakdown margin covers the full range. On-chip protection includes over-current limiting, thermal shutdown, and under-voltage lockout (UVLO) — the UVLO threshold prevents the output from sourcing current into a rail that hasn't fully come up, which avoids latch-up on the downstream load. ## SOT-23-5 footprint and supply format The LP2985-33DBVRM3 comes in an SOT-23-5 (SC-74A) package — the pinout is standard for this class: input, ground, enable, output, and a no-connect or bypass pin depending on the variant. The 0.95 mm pitch and 2.9 x 1.6 mm body fit a 2-layer board with a ground pour under the package. Available in Tape & Reel (TR) or Cut Tape (CT) — the TR format is the standard reel for automated pick-and-place; CT is for prototype or low-volume builds where the reel fee isn't justified. ## Active lifecycle and sourcing posture RoHS3 compliant per the manufacturer's declaration — no exemptions for lead in solder or other restricted substances under the current EU directive.","metaTitle":"Texas Instruments LP2985-33DBVRM3 LDO, 150mA, 3.3V Fixed","metaDescription":"Texas Instruments LP2985-33DBVRM3 LDO voltage regulator: 150 mA output, 3.3 V fixed, 16 V input max, 95 µA Iq, PSRR 78-45 dB. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"PSRR":"78dB ~ 45dB (1kHz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"SC-74A, SOT-753","lifecycle_stage":"eol_hot","Control Features":"Current Limit, Enable","Current - Output":"150mA","Protection Features":"Over Current, Over Temperature, Under Voltage Lockout (UVLO)","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C (TJ)","Voltage - Input (Max)":"16V","Voltage Dropout (Max)":"0.575V @ 150mA","Current - Supply (Max)":"2 mA","Supplier Device Package":"SOT-23-5","Current - Quiescent (Iq)":"95 µA","Voltage - Output (Min/Fixed)":"3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.55","priceTiers":[{"qty":1,"price":"$0.55000","currency":"USD"},{"qty":10,"price":"$0.47300","currency":"USD"},{"qty":25,"price":"$0.44200","currency":"USD"},{"qty":100,"price":"$0.35350","currency":"USD"},{"qty":250,"price":"$0.32824","currency":"USD"},{"qty":500,"price":"$0.27776","currency":"USD"},{"qty":1000,"price":"$0.21462","currency":"USD"},{"qty":3000,"price":"$0.19569","currency":"USD"},{"qty":6000,"price":"$0.18306","currency":"USD"},{"qty":15000,"price":"$0.17044","currency":"USD"},{"qty":30000,"price":"$0.16160","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/64f7ba6028c25c27c33c7b56482d6fad.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LP2985-33DBVRM3/alternatives.json"},"ai":{"faq":[{"question":"What is the PSRR of the LP2985-33DBVRM3 and why does it matter?","answer":"PSRR is 78 dB to 45 dB at 1 kHz — the 78 dB figure is the rejection at the low end of the switching-regulator ripple band; the 45 dB figure is the worst-case within that band. For a 100 mVpp ripple on the input, the output sees roughly 0.56 mVpp at 1 kHz, which is clean enough for a 10-bit ADC reference rail but marginal for a 16-bit sigma-delta converter without additional post-filtering."},{"question":"Can the LP2985-33DBVRM3 replace a TLV74333PDQNR without a board spin?","answer":"No — the TLV74333PDQNR is a 300 mA LDO in a different package (X2SON-4 vs SOT-23-5). The pinout and footprint are incompatible; a board layout change is required. The LP2985-33DBVRM3 offers higher PSRR (78 dB vs 68 dB at 1 kHz) but lower output current (150 mA vs 300 mA), so the replacement also depends on the load budget."},{"question":"What compliance documentation does Texas Instruments provide for the LP2985-33DBVRM3?","answer":"The part is RoHS3 compliant per the manufacturer's declaration. Standard TI documentation includes the datasheet, application notes, and a PCN notification service for any future changes."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP2985-33DBVRM3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LP2985-33DBVRM3 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}}