{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX5921EESA+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX5921EESA","canonicalUrl":"https://icboms.com/analog-devices/MAX5921EESA","factsUrl":"https://icboms.com/api/mcp/products/MAX5921EESA%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated MAX5921EESA+, Hot Swap Controller, -48V, 1 Channel, 700 µA Supply, -80V ~ -20V, 8-SOIC, -40°C to 85°C.","salesMarkdown":"## -48V hot swap controller in 8-SOIC The Maxim Integrated MAX5921EESA+ is a single-channel hot swap controller designed for -48V power rails, packaged in an 8-pin SOIC (0.154\" width, 3.90 mm body) for surface-mount assembly. It manages inrush current and provides overcurrent protection when a card or module is plugged into a live backplane, typical in telecom and industrial -48V distributed-power systems. The controller operates from -80V down to -20V, drawing 700 µA supply current, and integrates programmable circuit breaker, current limit, overvoltage protection (OVP), and undervoltage lockout (UVLO) thresholds. ## External MOSFET required The MAX5921EESA+ does not include an internal pass switch, so the BOM must add an external N-channel MOSFET and a sense resistor to handle the load current. This gives the designer control over the FET's RDS(on) and current rating to match the specific load — a 48 V / 5 A card needs a different FET than a 48 V / 1 A line card. The external FET also simplifies thermal management: the heat dissipates in the FET's package, not in the controller. ## Programmable protection and auto-retry The controller supports programmable circuit breaker and current-limit thresholds, plus OVP and UVLO setpoints, via external resistor dividers. The auto-retry feature (listed among the part's features) means the controller will repeatedly attempt to restart after a fault clears, which is useful for transient overloads in telecom line cards. A fault timeout and thermal-limit circuit prevent sustained overstress on the external FET. ## Temperature grade and environment Rated for -40°C to 85°C operating temperature, the MAX5921EESA+ suits outdoor telecom cabinets, base stations, and industrial equipment where the ambient temperature can swing through the full industrial range. The 8-SOIC package is standard reflow-friendly, MSL 1 typically for Maxim SOIC parts — no special bake needed if the moisture-barrier bag is intact. ## Lifecycle and sourcing The MAX5921EESA+ carries an active lifecycle status and is ROHS3 compliant.","metaTitle":"MAX5921EESA+ Hot Swap Controller, -48V, 8-SOIC","metaDescription":"MAX5921EESA+ hot swap controller for -48V systems. Active, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Type":"Hot Swap Controller","Package":"Tube","Features":"Auto Retry, Fault Timeout, Thermal Limit","Applications":"-48V","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Current - Supply":"700 µA","Voltage - Supply":"-80V ~ -20V","Internal Switch(s)":"No","Number of Channels":"1","Operating Temperature":"-40°C ~ 85°C","Programmable Features":"Circuit Breaker, Current Limit, OVP, UVLO","Supplier Device Package":"8-SOIC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.78","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$7.78000","currency":"USD"},{"qty":10,"price":"$7.03000","currency":"USD"},{"qty":25,"price":"$6.70360","currency":"USD"},{"qty":100,"price":"$5.82060","currency":"USD"},{"qty":250,"price":"$5.55900","currency":"USD"},{"qty":500,"price":"$5.06850","currency":"USD"},{"qty":1000,"price":"$4.90500","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/78e32e27c16e6bd21684456c63497915.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does MAX5921EESA+ require external MOSFETs?","answer":"Yes, the MAX5921EESA+ has no internal switch, so an external N-channel MOSFET and a sense resistor are required to handle the load current."},{"question":"What is the closest pin-compatible alternative to MAX5921EESA+?","answer":"No official second-source or pin-compatible alternative is listed in the available records. For a cross-reference, consult the Maxim Integrated product family or submit an RFQ for assistance identifying a drop-in replacement."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX5921EESA","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX5921EESA 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}}