{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LTC4371IMS#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LTC4371IMSPBF","canonicalUrl":"https://icboms.com/analog-devices/LTC4371IMSPBF","factsUrl":"https://icboms.com/api/mcp/products/LTC4371IMS%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Linear Technology LTC4371IMS#PBF N+1 ORing Controller, N-Channel FET, 300 µA supply, 4.5V to 16V supply range, 2:1 input-to-output ratio, -40°C to 85°C, 10-MSOP package.","salesMarkdown":"## What the LTC4371IMS#PBF does in a -48V backplane The LTC4371IMS#PBF is an N+1 ORing controller designed for -48V distributed power systems and AdvancedTCA® equipment. It drives two external N-channel MOSFETs in a 2:1 input-to-output ratio — two incoming -48V feeds ORed onto a single output bus — so a fault on one feed doesn't drop the load. The controller itself draws 300 µA supply current, which keeps the quiescent overhead on the -48V rail negligible. That matters in telecom line cards where every milliwatt of housekeeping power is budgeted against the rectifier capacity. It operates from a 4.5V to 16V bias supply — not the -48V bus directly. The bias rail powers the gate drive for the external N-FETs, so a 12V auxiliary rail is the typical choice to get full gate enhancement. ## External FETs and the BOM footprint The LTC4371 has no internal switches — you supply the two N-channel MOSFETs. That means the BOM includes the controller plus a matched FET pair with Vds rating above the -48V rail (60V to 100V parts are common). FET selection sets the Rdson and the conduction loss, not the controller. The 10-MSOP package (3.00 mm width) fits on compact line-card layouts. The MSOP pitch is 0.50 mm — doable on a two-layer board with careful fan-out, though a four-layer stack with a dedicated ground plane lowers the noise coupling from the gate drive edges. No need for the extended -55°C military range unless the equipment sits in an unheated enclosure at extreme altitude. ## Lifecycle and compliance ROHS3 compliant (lead-free).","metaTitle":"LTC4371IMS#PBF N+1 ORing Controller, -48V, Active","metaDescription":"LTC4371IMS#PBF N+1 ORing Controller for -48V distributed power systems. Active lifecycle, 300 µA supply, 4.5-16V input, 10-MSOP.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":[],"specifications":{"Type":"N+1 ORing Controller","Package":"Tube","FET Type":"N-Channel","Applications":"-48V Dist Power Systems, AdvancedTCA® Systems","Mounting Type":"Surface Mount","Package / Case":"10-TFSOP, 10-MSOP (0.118\\\", 3.00mm Width)","lifecycle_stage":"eol_hot","Current - Supply":"300 µA","Voltage - Supply":"4.5V ~ 16V","Internal Switch(s)":"No","Ratio - Input:Output":"2:1","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"10-MSOP"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$8.32","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$8.32000","currency":"USD"},{"qty":10,"price":"$7.51300","currency":"USD"},{"qty":25,"price":"$7.16400","currency":"USD"},{"qty":100,"price":"$6.22040","currency":"USD"},{"qty":250,"price":"$5.94080","currency":"USD"},{"qty":500,"price":"$5.41664","currency":"USD"},{"qty":1000,"price":"$4.71771","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/5f7c41323a387f0bde69af4e368939b8.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is the LTC4371IMS#PBF obsolete?","answer":"No discontinuation notice or last-time-buy schedule has been issued."},{"question":"Is LTC4371IMS#PBF RoHS compliant?","answer":"Yes, it is ROHS3 compliant."},{"question":"Is there a replacement or alternative for LTC4371IMS#PBF?","answer":"The LTC4371IDD#PBF is a functional sibling with the same N+1 ORing controller core, N-channel FET drive, 2:1 ratio, and -48V application target. The difference is the package — the IDD variant comes in a DFN, not the MSOP of the IMS. Verify the footprint compatibility with your board layout before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LTC4371IMSPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LTC4371IMSPBF 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}}