{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LTC4359IS8#TRPBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LTC4359IS8TRPBF","canonicalUrl":"https://icboms.com/analog-devices/LTC4359IS8TRPBF","factsUrl":"https://icboms.com/api/mcp/products/LTC4359IS8%23TRPBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LTC4359IS8#TRPBF, N+1 ORing Controller, N-Channel, 4V to 80V supply, 300 ns off-delay, 200 µs on-delay, 150 µA supply current, 8-SOIC package, -40°C to 85°C.","salesMarkdown":"## What this ORing controller does in the rail The LTC4359IS8#TRPBF is an N+1 ORing controller from Analog Devices that drives an external N-channel MOSFET to emulate a Schottky diode with a much lower forward voltage drop. It manages the connection of multiple power supplies to a common load rail, allowing seamless N+1 redundancy without the heat and voltage loss of a discrete diode. The controller does not integrate the power switch — it drives an external N-channel MOSFET, giving the designer flexibility to size the pass element for the specific load current and thermal budget. ## Asymmetric delay: fast block, slow engage The critical timing spec is the 300 ns off-delay — when the input supply droops or fails, the controller turns off the external MOSFET in 300 ns, blocking reverse current from the output capacitor or the redundant supply back into the failing rail. That fast response prevents bus collapse and keeps the load powered without interruption. The 200 µs on-delay is deliberately slow: it prevents the MOSFET from turning on during the initial power-up transient or during a brief input glitch, avoiding a current surge that could pull down the shared rail. Supply current is 150 µA — low enough to keep the controller alive on the output rail even when its own input supply is absent, which is the typical ORing topology. ## Where it fits: redundant supplies and automotive Application targets include automotive electronics (ECUs, infotainment, ADAS power distribution), redundant power supplies for servers and base stations, and telecom infrastructure where dual-feed or battery-backup ORing is required. The N:1 input-to-output ratio means it can handle multiple input feeds (N) to a single output rail — the controller selects the highest-voltage input and blocks the rest, with the fast off-delay catching any supply that drops. ## Package and footprint The supplier device package is 8-SO — a standard footprint shared with many other ORing controllers and op-amps, making board layout reuse straightforward. ## Lifecycle and sourcing posture It is ROHS3 compliant.","metaTitle":"LTC4359IS8#TRPBF N+1 ORing Controller, 4V-80V Supply, 8-SOIC","metaDescription":"LTC4359IS8#TRPBF N+1 ORing Controller from Analog Devices. N-Channel, 4V to 80V supply, 300 ns off-delay, 200 µs on-delay. Industrial temp -40°C to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":[],"specifications":{"Type":"N+1 ORing Controller","Package":"Tape & Reel (TR); Cut Tape (CT)","FET Type":"N-Channel","Applications":"Automotive, Redundant Power Supplies, Telecom Infrastructure","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Delay Time - ON":"200 µs","lifecycle_stage":"eol_hot","Current - Supply":"150 µA","Delay Time - OFF":"300 ns","Voltage - Supply":"4V ~ 80V","Internal Switch(s)":"No","Ratio - Input:Output":"N:1","Operating Temperature":"-40°C ~ 85°C (TA)","Current - Output (Max)":"220µA","Supplier Device Package":"8-SO"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.67","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$7.67000","currency":"USD"},{"qty":10,"price":"$6.92700","currency":"USD"},{"qty":25,"price":"$6.60480","currency":"USD"},{"qty":100,"price":"$5.73500","currency":"USD"},{"qty":250,"price":"$5.47724","currency":"USD"},{"qty":500,"price":"$4.99394","currency":"USD"},{"qty":1000,"price":"$4.34956","currency":"USD"},{"qty":2500,"price":"$4.18847","currency":"USD"}]},"links":{"datasheetUrl":"http://www.analog.com/media/en/technical-documentation/data-sheets/ltc4359.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can LTC4359IS8 be used for automotive ORing?","answer":"Yes, automotive is a listed application. For the extended temperature range, consider the LTC4359HDCB variants."},{"question":"What is the difference between LTC4359 and LTC4357?","answer":"The LTC4359 is a newer-generation ORing controller with a wider 4V to 80V supply range and faster 300 ns off-delay compared to the LTC4357. The LTC4359 also includes a REV pin for reverse input protection and operates with a lower 150 µA supply current. The LTC4357 is limited to 9V to 80V and has a slower off-delay."},{"question":"What is a direct equivalent for LTC4359IS8#TRPBF?","answer":"The closest functional equivalent is the LTC4359IDCB#TRMPBF, which shares the same N+1 ORing controller core, 4V to 80V supply, 300 ns off-delay, and 200 µs on-delay. The key difference is the package: the IDCB variant comes in a 6-DFN (2mm x 3mm) package, while the IS8 is in an 8-SOIC."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LTC4359IS8TRPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LTC4359IS8TRPBF 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}}