{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LT3065EMSE-1.8#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LT3065EMSE-1.8~4PBF","canonicalUrl":"https://icboms.com/analog-devices/LT3065EMSE-1.8~4PBF","factsUrl":"https://icboms.com/api/mcp/products/LT3065EMSE-1.8%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LT3065EMSE-1.8#PBF LDO linear voltage regulator, fixed 1.8V output, 500mA, 45V input max, 74dB PSRR at 120Hz, 12-MSOP-EP exposed pad, tube.","salesMarkdown":"## 1.8V fixed rail with 74 dB PSRR — the noise floor decision The LT3065EMSE-1.8#PBF is a single-output positive LDO regulator delivering a fixed 1.8V at up to 500 mA from a 45 V maximum input rail. Its 74 dB power-supply rejection ratio at 120 Hz means that 120 Hz ripple on the input bus — from a line-frequency rectifier or a switching pre-regulator — is attenuated by a factor of roughly 5000 before it reaches the output. For an analog front-end or a precision ADC reference supply, that is the difference between a clean 1.8 V rail and one that carries audible-frequency noise into the signal chain. Below that, the output follows the input minus dropout, and the PSRR collapses. For a 3.3 V bus feeding this LDO, there is roughly 1 V of margin — comfortable for most designs, but a 2.5 V input rail would leave only 0.19 V of headroom, which is below the dropout spec. ## Active production — no end-of-life clock ticking ROHS3 compliant per, with no exemption expiry to track. The 12-MSOP-EP package (exposed pad) is a standard footprint for this current class. In a reflow profile, the pad sees the same peak temperature as the leads; no special bake or handling beyond the MSL rating typical for MSOP packages. ## Protection and control — what the on-chip supervisor handles Over-current, over-temperature, and reverse-polarity protection are built in — the LDO survives a shorted output or a reverse-battery event without external clamp diodes on the input, provided the input voltage stays within the 45 V abs-max. The power-good flag asserts when the output is within regulation, which can drive a reset line or enable a downstream converter. The quiescent current is 110 µA typical, rising to 25 mA maximum under full load — the 25 mA figure is the supply current drawn by the internal bias and drive circuits, not the output current. For always-on rails in battery-powered equipment, the 110 µA Iq is the standby overhead; the 25 mA max is the worst-case when the output is sourcing 500 mA and the dropout is near its limit. The 125°C junction limit means the part can sit in an engine bay or a hot enclosure as long as the thermal resistance of the board keeps the junction below that ceiling at full load. Derating the output current above 85°C ambient is typical for a 12-MSOP-EP package on a standard 2-layer board.","metaTitle":"LT3065EMSE-1.8#PBF LDO Regulator, 1.8V Fixed, 500mA","metaDescription":"LT3065EMSE-1.8#PBF LDO regulator, 1.8V fixed output, 500mA, 45V max input, 74dB PSRR at 120Hz, -40°C to 125°C. Active production, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"PSRR":"74dB (120Hz)","Package":"Tube","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"12-TSSOP (0.118\\\", 3.00mm Width) Exposed Pad","lifecycle_stage":"eol_hot","Control Features":"Current Limit, Enable, Power Good, Soft Start","Current - Output":"500mA","Protection Features":"Over Current, Over Temperature, Reverse Polarity","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C","Voltage - Input (Max)":"45V","Voltage Dropout (Max)":"0.51V @ 500mA","Current - Supply (Max)":"25 mA","Supplier Device Package":"12-MSOP-EP","Current - Quiescent (Iq)":"110 µA","Voltage - Output (Min/Fixed)":"1.8V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.32","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$6.32000","currency":"USD"},{"qty":10,"price":"$5.67600","currency":"USD"},{"qty":25,"price":"$5.36640","currency":"USD"},{"qty":100,"price":"$4.65080","currency":"USD"},{"qty":250,"price":"$4.41224","currency":"USD"},{"qty":500,"price":"$3.95910","currency":"USD"},{"qty":1000,"price":"$3.37500","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What is the PSRR of LT3065EMSE-1.8#PBF and why does it matter?","answer":"The PSRR is 74 dB at 120 Hz. That means 120 Hz ripple on the input — from a line-frequency rectifier or a switching pre-regulator — is attenuated by roughly 5000× before it reaches the 1.8 V output. For an analog supply rail powering an ADC or an op-amp, this keeps the noise floor low enough that the signal chain is not limited by power-supply artifacts."},{"question":"Will LT3065EMSE-1.8#PBF drop into a board designed for LT3065EMSE-3.3#PBF?","answer":"The two parts share the same package (12-MSOP-EP), pinout, and control/protection features. The only difference is the fixed output voltage — 1.8 V vs 3.3 V. If the board's downstream loads are rated for 1.8 V, the swap is pin-compatible with no board spin. If the loads expect 3.3 V, the 1.8 V output will under-power them."},{"question":"What compliance documentation is available for LT3065EMSE-1.8#PBF?","answer":"The part is ROHS3 compliant per the manufacturer's declaration. Standard compliance documentation (RoHS certificate of compliance, REACH declaration) is available upon request with the RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LT3065EMSE-1.8~4PBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LT3065EMSE-1.8~4PBF 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}}