{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LTC1771IS8#TRPBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LTC1771IS8TRPBF","canonicalUrl":"https://icboms.com/analog-devices/LTC1771IS8TRPBF","factsUrl":"https://icboms.com/api/mcp/products/LTC1771IS8%23TRPBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LTC1771IS8#TRPBF, Step-Down (Buck) Switching Controller, Non-Synchronous, Transistor Driver Output, 1 Output, 2.8V to 18V Supply, 100% Max Duty Cycle, 8-SOIC Package, -40°C to 85°C.","salesMarkdown":"## What the LTC1771IS8#TRPBF is and where it fits The LTC1771IS8#TRPBF from Analog Devices is a non-synchronous step-down (buck) switching regulator controller. It drives an external N-channel MOSFET and a catch diode to regulate a positive output voltage from a higher-voltage input rail. The part is aimed at applications where a simple, robust buck stage is needed without the complexity of synchronous rectification. Key features include an Enable pin for on/off control, a Soft Start pin for controlled inrush, and a 100% maximum duty cycle that allows the external MOSFET to stay fully on — useful when the output must track close to the input voltage or during pre-biased startup. The operating temperature range of -40°C to 85°C covers industrial environments, outdoor telecom cabinets, and factory-floor equipment, but does not extend to under-hood automotive or high-temperature industrial processes. Housed in an 8-pin SOIC package (8-SO), this controller is a surface-mount part suited for compact PCB layouts in power supplies, distributed power architectures, and point-of-load regulators. ## Supply range and duty cycle — what drives the design A 100% duty cycle means the external MOSFET can be held on continuously. In practice, this allows the output to rise to within a diode drop of the input when the load demands it, and it simplifies startup into a pre-biased output where the controller does not need to force the inductor current negative. Because this is a non-synchronous controller, the designer must add an external Schottky catch diode. The diode's forward voltage and reverse leakage affect efficiency, especially at low output voltages and high switching frequencies. The BOM should budget for a diode rated for the peak inductor current and the input voltage. ## Lifecycle and sourcing reality The LTC1771IS8#TRPBF is listed as Active with a current lifecycle stage. Buyers can commit this to a production BOM without near-term obsolescence risk. The part is ROHS3 compliant, so it meets the current European restriction on hazardous substances without an exemption.","metaTitle":"LTC1771IS8#TRPBF Buck Controller, 2.8-18V, 100% Duty Cycle","metaDescription":"ADI LTC1771IS8#TRPBF is a non-synchronous buck controller in SOIC-8. Input range 2.8V to 18V, 100% duty cycle, -40°C to 85°C. Active, available to order.","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":"No","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Control Features":"Enable, Soft Start","Duty Cycle (Max)":"100%","Number of Outputs":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 85°C (TA)","Synchronous Rectifier":"No","Supplier Device Package":"8-SO","Voltage - Supply (Vcc/Vdd)":"2.8V ~ 18V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$8.73","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$8.73000","currency":"USD"},{"qty":10,"price":"$7.88500","currency":"USD"},{"qty":25,"price":"$7.51840","currency":"USD"},{"qty":100,"price":"$6.52830","currency":"USD"},{"qty":250,"price":"$6.23492","currency":"USD"},{"qty":500,"price":"$5.68478","currency":"USD"},{"qty":1000,"price":"$5.19000","currency":"USD"},{"qty":2500,"price":"$5.19000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/860c16b7e6b8633ccd62296463421170.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can I use LTC1771IS8 for a non-synchronous buck with external MOSFETs?","answer":"Yes. The LTC1771IS8 is a non-synchronous buck controller that drives an external N-channel MOSFET and requires an external catch diode. It outputs a Transistor Driver signal to the gate of the external MOSFET."},{"question":"Is LTC1771IS8 synchronous or non-synchronous?","answer":"It is non-synchronous. The part does not include a synchronous rectifier driver, so an external Schottky diode is needed for the low-side path."},{"question":"What is LTC1771IS8#TRPBF's listed package?","answer":"The device is supplied in an 8-SOIC package (8-SO), surface-mount, with a 3.90 mm body width. The #TRPBF suffix indicates Tape & Reel packaging."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LTC1771IS8TRPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LTC1771IS8TRPBF 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}}