{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LT3015EDD-2.5#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LT3015EDD-2.5~4PBF","canonicalUrl":"https://icboms.com/analog-devices/LT3015EDD-2.5~4PBF","factsUrl":"https://icboms.com/api/mcp/products/LT3015EDD-2.5%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LT3015EDD-2.5#PBF negative linear regulator, fixed -2.5 V output, 1.5 A, 62 dB PSRR at 120 Hz, 0.5 V dropout, 8-WFDFN exposed pad, tube.","salesMarkdown":"## Negative rail LDO with 62 dB ripple rejection at line frequency The LT3015EDD-2.5#PBF is a fixed -2.5 V output LDO from Analog Devices, delivering up to 1.5 A from a negative input rail as low as -30 V. Its 62 dB PSRR at 120 Hz means it attenuates the 100/120 Hz ripple from a full-wave rectified supply by a factor of roughly 1250 — critical for powering sensitive analog front-ends that share a rail with a motor drive or switching converter. The 0.5 V maximum dropout at 1.5 A sets the headroom requirement: the input must be at least 0.5 V more negative than -2.5 V (e.g., -3.0 V or lower) to keep the output in regulation under full load. ## Thermal and layout — the exposed pad is the heat pipe Housed in an 8-WFDFN with exposed pad (3x3 mm DFN), the LT3015EDD-2.5#PBF relies on the pad soldered to a PCB copper plane for thermal dissipation. At 1.5 A with 0.5 V dropout, the die dissipates 0.75 W — the junction-to-ambient thermal resistance of this package on a standard 2-layer board is around 40-50 °C/W, so the junction rises 30-38 °C above ambient. In a 85 °C enclosure, that puts the junction at 115-123 °C, still within the -40°C to 125°C operating range, but with little margin. A 4-layer board with thermal vias under the pad drops RthJA significantly. The enable pin (active high, 1.2 V threshold typical) lets a supervisor or GPIO sequence the negative rail on after the positive rail is stable — common in dual-supply op-amp circuits where the positive rail must come up first to avoid latch-up. ## Protection suite — reverse polarity saves an external diode Built-in reverse polarity protection means the LT3015EDD-2.5#PBF survives a reversed input connection without an external Schottky in series — the internal pass element blocks reverse current. Over-current and over-temperature shutdown round out the protection set, making it suitable for industrial control boards where field wiring faults are common.","metaTitle":"LT3015EDD-2.5#PBF Analog Devices LDO, -2.5V, 1.5A, 62dB PSRR","metaDescription":"LT3015EDD-2.5#PBF negative LDO, fixed -2.5V output, 1.5A, 62dB PSRR at 120Hz, 0.5V dropout. Active production, ROHS3. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"PSRR":"62dB (120Hz)","Package":"Tube","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"8-WFDFN Exposed Pad","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"1.5A","Protection Features":"Over Current, Over Temperature, Reverse Polarity","Number of Regulators":"1","Output Configuration":"Negative","Operating Temperature":"-40°C ~ 125°C","Voltage - Input (Max)":"-30V","Voltage Dropout (Max)":"0.5V @ 1.5A","Current - Supply (Max)":"70 mA","Supplier Device Package":"8-DFN (3x3)","Current - Quiescent (Iq)":"2.4 mA","Voltage - Output (Min/Fixed)":"-2.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$8.1","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$8.10000","currency":"USD"},{"qty":10,"price":"$7.31600","currency":"USD"},{"qty":25,"price":"$6.97520","currency":"USD"},{"qty":100,"price":"$6.05660","currency":"USD"},{"qty":250,"price":"$5.78440","currency":"USD"},{"qty":500,"price":"$5.27404","currency":"USD"},{"qty":1000,"price":"$4.81500","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/93b55b28d791f8cb876c762237fdd33a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the PSRR of the LT3015EDD-2.5#PBF and why does it matter?","answer":"The LT3015EDD-2.5#PBF provides 62 dB of power supply rejection at 120 Hz. This is the fundamental ripple frequency from a full-wave rectified AC line — 62 dB means the output ripple is attenuated by roughly 1250×, so a 1 Vpp input ripple becomes about 0.8 mVpp at the output. This matters for powering precision analog circuits like ADC reference buffers or low-noise op-amp rails where line-frequency hum would otherwise couple into the signal path."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LT3015EDD-2.5~4PBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LT3015EDD-2.5~4PBF 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}}