{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LT3045EMSE#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LT3045EMSE~4PBF","canonicalUrl":"https://icboms.com/analog-devices/LT3045EMSE~4PBF","factsUrl":"https://icboms.com/api/mcp/products/LT3045EMSE%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LT3045EMSE#PBF adjustable LDO, 500 mA output, 20 V input max, 117 dB PSRR (120 Hz), 12-MSOP-EP package, tube.","salesMarkdown":"## 117 dB PSRR — what it means for a sensitive analog rail The LT3045EMSE#PBF delivers 117 dB of power-supply rejection at 120 Hz, tapering to 53 dB at 10 MHz. That rejection holds across the full 500 mA output range without an external feed-forward capacitor, which means a downstream ADC or VCO sees the regulator's own noise floor rather than the switching ripple from a buck converter upstream. ## 500 mA output and dropout headroom Rated for 500 mA continuous output with a maximum dropout of 0.45 V at full load. The input rail must stay at least 0.45 V above the programmed output across the full load and temperature range; a 3.3 V output needs a 3.75 V minimum input, pushing the supply rail to 5 V or a boost stage in many low-noise designs. Quiescent current is 20 µA typical, rising to 25 mA at maximum supply current — the 20 µA figure dominates in battery-backed always-on rails where the load is light and the regulator spends most of its time in regulation. Output voltage is adjustable from 0 V to 15 V via a single resistor divider; the reference operates down to 0 V, so the part can serve negative rail generation or power a precision DAC reference that must track to ground.","metaTitle":"Analog Devices LT3045EMSE#PBF LDO, 500 mA, 117 dB PSRR","metaDescription":"LT3045EMSE#PBF from Analog Devices: 500 mA adjustable LDO, 117 dB PSRR at 120 Hz, 20 µA quiescent, -40 to 125°C, 12-MSOP-EP. Active production, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"PSRR":"117dB ~ 53dB (120Hz ~ 10MHz)","Package":"Tube","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"12-TSSOP (0.118\\\", 3.00mm Width) Exposed Pad","lifecycle_stage":"eol_hot","Control Features":"Enable, Power Good, Soft Start","Current - Output":"500mA","Protection Features":"Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C (TJ)","Voltage - Input (Max)":"20V","Voltage Dropout (Max)":"0.45V @ 500mA","Current - Supply (Max)":"25 mA","Voltage - Output (Max)":"15V","Supplier Device Package":"12-MSOP-EP","Current - Quiescent (Iq)":"20 µA","Voltage - Output (Min/Fixed)":"0V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$8.5","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$8.50000","currency":"USD"},{"qty":10,"price":"$7.68000","currency":"USD"},{"qty":25,"price":"$7.32320","currency":"USD"},{"qty":100,"price":"$6.35850","currency":"USD"},{"qty":250,"price":"$6.07272","currency":"USD"},{"qty":500,"price":"$5.53692","currency":"USD"},{"qty":1000,"price":"$5.05500","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/47d3f87b5195c2d384a5b3397f89bcb4.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How does the LT3045EMSE#PBF compare to the LT3045EDD#TRPBF?","answer":"The LT3045EDD#TRPBF uses the same die and shares the same PSRR (117 dB to 53 dB), output current (500 mA), and protection features. The difference is the package format: the EDD variant comes in a 12-lead DFN with a tape-and-reel delivery, while the EMSE uses the 12-MSOP-EP in a tube. The pinout and thermal pad differ, so the board layout is not drop-in compatible."},{"question":"What protection features does the LT3045EMSE#PBF include?","answer":"The regulator integrates over-current, over-temperature, reverse polarity, and under-voltage lockout (UVLO) protection. Reverse polarity protection prevents damage if the input is accidentally reversed — useful in bench power or field-service scenarios where wiring polarity is not guaranteed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LT3045EMSE~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/LT3045EMSE~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}}