{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LT8609AIMSE16#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LT8609AIMSE16~4PBF","canonicalUrl":"https://icboms.com/analog-devices/LT8609AIMSE16~4PBF","factsUrl":"https://icboms.com/api/mcp/products/LT8609AIMSE16%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LT8609AIMSE16#PBF step-down buck regulator, 3 A output, 42 V input max, adjustable output, 200 kHz-2.2 MHz, 16-TFSOP exposed pad, tube.","salesMarkdown":"## 3 A from a 42 V rail — the thermal pad tells the story The LT8609AIMSE16#PBF is a 3 A continuous-rated synchronous buck regulator from Analog Devices, stepping down from a 3 V to 42 V input rail down to an adjustable output as low as 0.782 V. That 42 V ceiling covers 24 V industrial supplies with margin for transients, and the 3 A output handles modest point-of-load rails for FPGAs, sensors, or communication modules without needing an external catch diode — the synchronous rectifier is on-die. The package is a 16-lead TFSOP with an exposed pad (MSOP-EP footprint). That pad is the primary thermal path — the datasheet's junction-to-ambient figure assumes a solid copper pour and via stitching under the pad. On a repair bench, a scorched LT8609 often traces back to a board layout where the thermal vias were omitted or the copper plane was split under the part. ## Switching frequency — synchronize or spread the noise The switching frequency is programmable from 200 kHz to 2.2 MHz via a resistor, or it can be synchronized to an external clock in that same range. Running at 2.2 MHz shrinks the inductor to a 0603 footprint but pushes the switching harmonics above the AM band — useful if the regulator shares a board with a radio receiver. Dropping to 200 kHz cuts switching losses by about a factor of ten, which matters when the input voltage is high and the duty cycle is low. At 125°C junction the internal FET Rds(on) roughly doubles from the 25°C value, so the 3 A output derates; the datasheet's thermal model should be run with the actual ambient and copper area before committing the layout.","metaTitle":"LT8609AIMSE16#PBF Buck Regulator, 3A, 42V, MSOP-EP","metaDescription":"Analog Devices LT8609AIMSE16#PBF step-down regulator, 3A output, 42V input max, 200kHz-2.2MHz, -40°C to 125°C, MSOP-EP. Active, ROHS3. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tube","Function":"Step-Down","Topology":"Buck","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"16-TFSOP (0.118\\\", 3.00mm Width) Exposed Pad","lifecycle_stage":"eol_hot","Current - Output":"3A","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"200kHz ~ 2.2MHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"Yes","Voltage - Input (Max)":"42V","Voltage - Input (Min)":"3V","Voltage - Output (Max)":"42V","Supplier Device Package":"16-MSOP-EP","Voltage - Output (Min/Fixed)":"0.782V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$8.17","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$8.17000","currency":"USD"},{"qty":10,"price":"$7.38400","currency":"USD"},{"qty":25,"price":"$7.04040","currency":"USD"},{"qty":100,"price":"$6.11320","currency":"USD"},{"qty":250,"price":"$5.83848","currency":"USD"},{"qty":500,"price":"$5.32332","currency":"USD"},{"qty":1000,"price":"$4.86000","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy LT8609AIMSE16#PBF and how do I get a price?","answer":"This part is sourced through independent distribution channels. No stock-holding claim is made — each order is quoted to the line item."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LT8609AIMSE16~4PBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LT8609AIMSE16~4PBF 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}}