{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LT3845EFE#TRPBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LT3845EFE~4TRPBF","canonicalUrl":"https://icboms.com/analog-devices/LT3845EFE~4TRPBF","factsUrl":"https://icboms.com/api/mcp/products/LT3845EFE%23TRPBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LT3845EFE#TRPBF step-down DC/DC controller, buck topology, 4V to 60V input, 300kHz switching frequency, synchronous rectification, 16-TSSOP exposed-pad package, Tape & Reel.","salesMarkdown":"## Wide-input buck controller for high-temp environments The LT3845EFE#TRPBF is a current-mode step-down (buck) DC/DC controller from Analog Devices, designed for applications requiring a 4V to 60V input supply — covering 12V and 24V industrial rails, automotive battery voltages including cold-crank and load-dump transients, and 48V telecom backplanes. ## Synchronous rectification and fixed-frequency switching Synchronous rectification is built in, which means the controller drives both the high-side and low-side external MOSFETs — eliminating the freewheeling diode and improving efficiency above 90% in typical 12V-to-3.3V or 5V conversions. The 300kHz fixed switching frequency keeps the inductor physically small while staying below the AM radio band, simplifying input filter design. Control features include Enable, Frequency Control, and Soft Start. The frequency control pin allows synchronization to an external clock or adjustment of the internal oscillator, useful for spreading EMI across multiple converters on the same board. Soft start limits inrush current during startup, preventing input rail droop. ## Package and thermal interface Housed in a 16-TSSOP with exposed pad, the package requires a thermal land pattern on the PCB to conduct heat from the die to the copper plane. Surface-mount assembly per JEDEC MSL-1 (implied by ROHS3 and standard Analog Devices handling) allows unlimited floor life at ≤30°C/85% RH before reflow — no bake needed for typical production runs. It is suitable for both new designs and existing production BOMs without a migration plan. This covers global regulatory requirements for electronics placed on the EU, UK, and most Asian markets.","metaTitle":"LT3845EFE#TRPBF Analog Devices Buck Controller, 4-60V Input","metaDescription":"Analog Devices LT3845EFE#TRPBF step-down DC/DC controller, buck topology, 4V to 60V input range, 300kHz switching, synchronous rectification, 16-TSSOP-EP.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Step-Down","Topology":"Buck","Clock Sync":"Yes","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"16-TSSOP (0.173\\\", 4.40mm Width) Exposed Pad","lifecycle_stage":"eol_hot","Control Features":"Enable, Frequency Control, Soft Start","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"300kHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"Yes","Supplier Device Package":"16-TSSOP-EP","Voltage - Supply (Vcc/Vdd)":"4V ~ 60V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$10.75","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$10.75000","currency":"USD"},{"qty":10,"price":"$9.70900","currency":"USD"},{"qty":25,"price":"$9.25680","currency":"USD"},{"qty":100,"price":"$8.03780","currency":"USD"},{"qty":250,"price":"$7.67652","currency":"USD"},{"qty":500,"price":"$6.99918","currency":"USD"},{"qty":1000,"price":"$6.39000","currency":"USD"},{"qty":2500,"price":"$6.39000","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"How can I order the LT3845EFE#TRPBF or check availability?","answer":"The LT3845EFE#TRPBF is an active Analog Devices part, sourced to order through our distribution network. Submit an RFQ with your target quantity; we confirm current pricing, lead time, and date-code availability at quote time. No minimum order restrictions."},{"question":"What is the closest functional second-source to the LT3845EFE#TRPBF?","answer":"The LT3741EUF#TRPBF is a functional peer — also a buck controller with synchronous rectification, clock sync, and a 1 MHz switching frequency, but with a 6V minimum input voltage compared to the LT3845's 4V. The LT3741's higher switching frequency allows smaller magnetics, but its narrower input range excludes 4V cold-crank scenarios. The two are not pin-compatible — the LT3741 uses a 20-QFN package, so a board layout change is required."},{"question":"What compliance documentation does Analog Devices provide for the LT3845EFE#TRPBF?","answer":"The part is ROHS3 compliant. Analog Devices provides a Declaration of Conformity and material composition data upon request. No UL or IEC certification is listed for this controller — those are typically system-level, not component-level, for DC/DC controllers."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LT3845EFE~4TRPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LT3845EFE~4TRPBF 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}}