{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ADM1278-1BCPZ","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"ADM1278-1BCPZ","canonicalUrl":"https://icboms.com/analog-devices/ADM1278-1BCPZ","factsUrl":"https://icboms.com/api/mcp/products/ADM1278-1BCPZ","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices ADM1278-1BCPZ Hot Swap Controller, Monitor, PMBus, 4.5V to 20V supply, 5.5 mA supply current, 32-LFCSP (5x5) package, Tray.","salesMarkdown":"## Hot swap controller with PMBus telemetry The ADM1278-1BCPZ is a hot swap controller and monitor from Analog Devices, designed to manage inrush current and provide fault protection for a single 4.5 V to 20 V rail. It integrates a PMBus interface for real-time current, voltage, and power telemetry, letting a system controller read the load status without separate sense circuitry. Because it lacks an internal switch, the external FET and sense resistor sit between the input supply and the load — the controller drives the gate, monitors the drop across the sense element, and reports back over the PMBus. This external-FET architecture means the board designer picks the FET Rds(on) and current rating to match the load, not the controller's internal limit. ## Supply range and programmable protection The controller draws 5.5 mA from that rail, so the power budget impact on the upstream converter is under 110 mW at 20 V. Programmable features include UVLO, OVP, current limit, fault timeout, slew rate control, auto retry, and latched fault. The UVLO and OVP thresholds set the window the input rail must stay within; the slew rate pin capacitor controls how fast the gate turns on, which directly sets the inrush current profile. Auto retry is useful for loads that recover after a transient fault — a latched fault is better for loads where a persistent short should stay off until cleared.","metaTitle":"ADM1278-1BCPZ Hot Swap Controller, Monitor, 4.5-20V","metaDescription":"Analog Devices ADM1278-1BCPZ hot swap controller and monitor with PMBus, 4.5V to 20V supply, 5.5 mA supply current, 32-LFCSP package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Type":"Hot Swap Controller, Monitor","Package":"Tray","Features":"PMBus","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"32-WFQFN Exposed Pad, CSP","lifecycle_stage":"eol_hot","Current - Supply":"5.5 mA","Voltage - Supply":"4.5V ~ 20V","Internal Switch(s)":"No","Number of Channels":"1","Operating Temperature":"-40°C ~ 85°C","Programmable Features":"Auto Retry, Current Limit, Fault Timeout, Latched Fault, OVP, Slew Rate, UVLO","Supplier Device Package":"32-LFCSP (5x5)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$18.37","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$18.37000","currency":"USD"},{"qty":10,"price":"$16.88100","currency":"USD"},{"qty":25,"price":"$16.18120","currency":"USD"},{"qty":80,"price":"$14.25700","currency":"USD"},{"qty":230,"price":"$13.55722","currency":"USD"},{"qty":440,"price":"$12.68257","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/43a8dba2add78b0b69fbf09de49909f6.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between ADM1278-1BCPZ and ADM1278-2ACPZ?","answer":"Both parts share the same die, PMBus feature set, 4.5 V to 20 V supply range, and 32-LFCSP package. The suffix difference (1BCPZ vs 2ACPZ) typically reflects a different test-program bin or calibration trim, not a functional change. They are not guaranteed pin-compatible without checking the respective datasheet ordering guide, but the core silicon is identical."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/ADM1278-1BCPZ","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/ADM1278-1BCPZ when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}