{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LTC1840IGN#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LTC1840IGNPBF","canonicalUrl":"https://icboms.com/analog-devices/LTC1840IGNPBF","factsUrl":"https://icboms.com/api/mcp/products/LTC1840IGN%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LTC1840IGN#PBF, PMOS Fan Controller - Speed, I²C/SMBus interface, 2.7V-5.75V supply, Pre-Driver - High Side (2), -40°C to 85°C, 16-SSOP package.","salesMarkdown":"## What the ratings mean for your BOM The pre-driver high-side output configuration (2) means this part does not integrate power MOSFETs — it drives external N-channel FETs. That keeps the heat out of the controller and lets you scale the fan current by choosing appropriate FETs. The I²C/SMBus interface simplifies wiring: a single two-wire bus controls multiple fan channels without extra GPIOs. The -40°C to 85°C operating range covers industrial enclosures and outdoor telecom cabinets, though the fan itself may have a narrower temperature spec. ## Lifecycle and sourcing The LTC1840IGN#PBF carries an active lifecycle status and is ROHS3 compliant. No end-of-life notice or last-time-buy schedule is in effect.","metaTitle":"LTC1840IGN#PBF Fan Controller, I²C/SMBus, 2.7V-5.75V","metaDescription":"LTC1840IGN#PBF is an active PMOS fan speed controller with I²C/SMBus interface, 2.7V-5.75V supply, -40°C to 85°C range.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tube","Function":"Controller - Speed","Interface":"I²C, SMBus","Technology":"PMOS","Applications":"Fan Controller","Mounting Type":"Surface Mount","Package / Case":"16-SSOP (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"2.7V ~ 5.75V","Motor Type - AC, DC":"Brushed DC","Output Configuration":"Pre-Driver - High Side (2)","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"16-SSOP"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$9.54","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$9.54000","currency":"USD"},{"qty":10,"price":"$8.61500","currency":"USD"},{"qty":25,"price":"$8.21400","currency":"USD"},{"qty":100,"price":"$7.13210","currency":"USD"},{"qty":250,"price":"$6.81156","currency":"USD"},{"qty":500,"price":"$6.21054","currency":"USD"},{"qty":1000,"price":"$5.67000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/65709b4b1f95296dd16f0bebe44bd478.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What are the typical applications of the LTC1840IGN#PBF?","answer":"It is designed as a fan controller for brushed DC fans, typically used in server power supplies, telecom equipment, and industrial systems where digital speed control via I²C or SMBus is required."},{"question":"What is the equivalent or replacement for the LTC1840IGN#PBF?","answer":"No direct pin-compatible replacement is listed. The LTC1695CS5#TRMPBF is a different part — a fully integrated fan driver for brushless DC fans with a 0.18 A output, not a pre-driver for brushed DC motors. Verify your motor type and drive topology before substituting."},{"question":"What is the LTC1840IGN#PBF datasheet?","answer":"The datasheet for the LTC1840IGN#PBF is available from Analog Devices and covers the I²C/SMBus command set, external FET selection guidelines, and thermal layout recommendations."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LTC1840IGNPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LTC1840IGNPBF when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}