{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX8555ETB+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX8555ETB","canonicalUrl":"https://icboms.com/analog-devices/MAX8555ETB","factsUrl":"https://icboms.com/api/mcp/products/MAX8555ETB%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated MAX8555ETB+, N+1 ORing Controller, N-Channel FET drive, 3V-5.5V / 8V-13.25V supply, 100 ns off-delay, 2 mA supply current, -40°C to 85°C, 10-TDFN-EP (3x3) package, Bulk.","salesMarkdown":"## What this ORing controller does on a redundant power rail The Maxim Integrated MAX8555ETB+ is an N+1 ORing controller designed to drive an external N-Channel MOSFET as the pass element in redundant power-supply architectures. It handles the rail-ORing function without an internal switch — the FET is external, which lets you size the pass device for the load current. The part is aimed at redundant power supplies and telecom infrastructure where a single supply failure must not take down the bus. ## 100 ns off-delay — what it means for the bus When the input rail drops, the controller must turn off the external FET fast enough to prevent reverse current from the healthy rail back-feeding the failed one. The 100 ns off-delay is the propagation time from detecting the fault to the gate drive going low. ## Temperature grade and environment Rated for -40°C to 85°C ambient, the part covers outdoor telecom cabinets, industrial base-station shelters, and factory-floor redundant supplies. No AEC-Q100 listing here, so it is not qualified for under-hood automotive — keep it in the controlled-climate rack. ## Lifecycle and sourcing No official second-source alternate is listed in the available documentation, so dual-sourcing would require a separate qualification of a functionally equivalent ORing controller from another vendor.","metaTitle":"MAX8555ETB+ N+1 ORing Controller, 100 ns Off-Delay, 10-TDFN","metaDescription":"MAX8555ETB+ N+1 ORing Controller from Maxim Integrated. Dual supply range 3V-5.5V / 8V-13.25V, 100 ns off-delay, industrial temp -40°C to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Type":"N+1 ORing Controller","Package":"Bulk","FET Type":"N-Channel","Applications":"Redundant Power Supplies, Telecom Infrastructure","Mounting Type":"Surface Mount","Package / Case":"10-WFDFN Exposed Pad","lifecycle_stage":"eol_hot","Current - Supply":"2 mA","Delay Time - OFF":"100 ns","Voltage - Supply":"3V ~ 5.5V, 8V ~ 13.25V","Internal Switch(s)":"No","Ratio - Input:Output":"1:1","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"10-TDFN-EP (3x3)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.02","stockQuantity":0,"priceTiers":[{"qty":149,"price":"$2.02000","currency":"USD"}]},"links":{"datasheetUrl":"https://rocelec.widen.net/view/pdf/zbz3clla5q/MAXMS03721-1.pdf?t.download=true&u=5oefqw","sourceUrl":null},"ai":{"faq":[{"question":"What is an ORing controller and how does the MAX8555ETB+ work?","answer":"An ORing controller drives an external N-Channel MOSFET to connect multiple power supplies to a common bus while blocking reverse current from a failed supply. The MAX8555ETB+ monitors the input voltage, and when it drops below the output, the controller turns off the FET within 100 ns to prevent back-feeding."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX8555ETB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX8555ETB 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}}