{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LTC1646CGN#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LTC1646CGNPBF","canonicalUrl":"https://icboms.com/analog-devices/LTC1646CGNPBF","factsUrl":"https://icboms.com/api/mcp/products/LTC1646CGN%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LTC1646CGN#PBF Hot Swap Controller, CompactPCI™ application, 2-channel, 3.3V/5V supply, 1.5 mA supply current, 16-SSOP package, 0°C to 70°C, Active.","salesMarkdown":"## CompactPCI hot swap — two-rail control in a 16-SSOP The LTC1646CGN#PBF from Analog Devices is a Hot Swap Controller specifically designed for CompactPCI™ backplane applications. It manages inrush current and fault protection on two independent channels, each monitoring a 3.3V and a 5V supply rail. The controller draws 1.5 mA from the supply and integrates programmable features — circuit breaker threshold, current limit, fault timeout, and slew rate — to tailor the turn-on profile to the load capacitance. ## Two channels, no internal switches — external MOSFETs required This is a controller-only part — there are no internal pass elements. Each channel drives an external N-channel MOSFET that sits in the power path. The two channels let you sequence or independently protect two CompactPCI slots, or one slot with separate 3.3V and 5V rails. The 0°C to 70°C commercial temperature grade fits indoor rack-mount equipment, not extended-temperature or outdoor telecom cabinets. ## Programmable protection — circuit breaker, current limit, fault timeout, slew rate Four programmable parameters give the designer control over the hot-swap event. The circuit breaker threshold sets the overcurrent trip point; the current limit clamps the MOSFET gate during startup; the fault timeout window distinguishes a transient from a hard short; and the slew rate pin programs the output voltage ramp. Latched fault behavior means the controller stays off after a fault until the input is cycled or the fault is cleared — a deliberate choice for backplane environments where automatic retry could cause repeated power cycling. ## Active lifecycle — no LTB risk The LTC1646CGN#PBF carries an Active product status with ROHS3 compliance. ## Sourcing and fit for the BOM Because the part is active and carries no internal switch, the BOM cost is split between the controller and the external MOSFETs — a trade-off that gives the designer freedom to pick the FET RDS(on) and package that match the slot current budget. The 16-SSOP footprint (3.90 mm width) is a common outline, and the surface-mount assembly is standard.","metaTitle":"LTC1646CGN#PBF Hot Swap Controller, CompactPCI, 2-Channel","metaDescription":"LTC1646CGN#PBF Hot Swap Controller for CompactPCI. Dual 3.3V/5V supply, 2 channels, programmable circuit breaker & slew rate. Active, ROHS3.","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":"Latched Fault, UVLO","Applications":"CompactPCI™","Mounting Type":"Surface Mount","Package / Case":"16-SSOP (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Current - Supply":"1.5 mA","Voltage - Supply":"3.3V, 5V","Internal Switch(s)":"No","Number of Channels":"2","Operating Temperature":"0°C ~ 70°C","Programmable Features":"Circuit Breaker, Current Limit, Fault Timeout, Slew Rate","Supplier Device Package":"16-SSOP"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$10.75","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$10.75000","currency":"USD"},{"qty":10,"price":"$9.70900","currency":"USD"},{"qty":25,"price":"$9.25680","currency":"USD"},{"qty":100,"price":"$8.03780","currency":"USD"},{"qty":250,"price":"$7.67652","currency":"USD"},{"qty":500,"price":"$6.99918","currency":"USD"},{"qty":1000,"price":"$6.39000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/75fa2aa907e3bee3ee008c3b70a70c3a.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does LTC1646CGN#PBF have internal switches?","answer":"No, the LTC1646CGN#PBF does not have internal switches. It is a controller-only device that requires external N-channel MOSFETs for the power path."},{"question":"What are the programmable features of LTC1646CGN#PBF?","answer":"The LTC1646CGN#PBF offers four programmable features: circuit breaker threshold, current limit, fault timeout, and slew rate. It also includes latched fault and undervoltage lockout (UVLO)."},{"question":"When sourcing LTC1646CGN#PBF, what is the closest functional alternative?","answer":"The LTC1647-3CGN#PBF is a close functional sibling — also a 2-channel Hot Swap Controller in a 16-SSOP tube package, with programmable circuit breaker, fault timeout, and slew rate. The key difference is that the LTC1647-3CGN#PBF targets general-purpose applications (not CompactPCI-specific) and uses auto-retry instead of latched fault behavior. It also operates from a 2.7V supply rather than the dual 3.3V/5V rails of the LTC1646."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LTC1646CGNPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LTC1646CGNPBF 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}}