{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ40Z80RSMT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ40Z80RSMT","canonicalUrl":"https://icboms.com/texas-instruments/BQ40Z80RSMT","factsUrl":"https://icboms.com/api/mcp/products/BQ40Z80RSMT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ40Z80RSMT Multi-Function Controller, Lithium Ion/Polymer, 2 ~ 7 Cells, SMBus Interface, 32-VFQFN Exposed Pad, Surface Mount.","salesMarkdown":"## 2-to-7-cell Li-ion guard with SMBus telemetry The BQ40Z80RSMT is a multi-function controller from Texas Instruments purpose-built for Lithium Ion and Lithium Polymer battery packs spanning 2 to 7 series cells. It communicates over an SMBus interface, so the host system reads state-of-charge, voltage, and fault flags directly without an external ADC or gauge chip. ## Fault protection scope — what each monitor catches The device integrates protection against overcurrent, overtemperature, overvoltage, undervoltage, and short circuit. Overcurrent detection prevents the pack from sourcing into a dead short or an excessive load that would stress the cells; the overtemperature monitor shuts down charge or discharge when the internal or external thermistor trips; over/under voltage per-cell protection keeps each series element inside its safe window. This is a single-chip safety supervisor, not just a coulomb counter. ## 32-VQFN package — thermal and layout notes The part is housed in a 32-VFQFN exposed pad (4x4 mm, supplier package 32-VQFN). Surface-mount assembly with the pad tied to the ground pour keeps the junction temperature within the -40 to 85°C operating range during charge/discharge transitions.","metaTitle":"BQ40Z80RSMT Texas Instruments Multi-Function Battery","metaDescription":"BQ40Z80RSMT TI multi-function Li-ion/polymer battery controller, 2-7 cells, SMBus, 32-VQFN. Active production, ROHS3. Sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Multi-Function Controller","Interface":"SMBus","Mounting Type":"Surface Mount","Package / Case":"32-VFQFN Exposed Pad","Number of Cells":"2 ~ 7","lifecycle_stage":"eol_hot","Fault Protection":"Over Current, Over Temperature, Over/Under Voltage, Short Circuit","Battery Chemistry":"Lithium Ion/Polymer","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"32-VQFN (4x4)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.36","priceTiers":[{"qty":1,"price":"$6.36000","currency":"USD"},{"qty":10,"price":"$5.74300","currency":"USD"},{"qty":25,"price":"$5.47600","currency":"USD"},{"qty":100,"price":"$4.75470","currency":"USD"},{"qty":250,"price":"$4.54104","currency":"USD"},{"qty":500,"price":"$4.14036","currency":"USD"},{"qty":1250,"price":"$3.78000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/f7cd526c92d567ec8ff7a5f8bb95bab5.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BQ40Z80RSMT/alternatives.json"},"ai":{"faq":[{"question":"How does the BQ40Z80RSMT compare to the BQ296217DSGT?","answer":"The BQ296217DSGT is a narrower battery protection IC supporting 2 to 4 cells with only overvoltage fault protection, whereas the BQ40Z80RSMT handles 2 to 7 cells and includes overcurrent, overtemperature, over/under voltage, and short-circuit protection. The BQ296217DSGT also has a higher maximum operating temperature (110°C vs 85°C), but the BQ40Z80RSMT is a full multi-function controller with SMBus communication, not just a protection monitor. The packages are different — the BQ296217DSGT is in a smaller 8-SON — so they are not pin-compatible drop-in replacements."},{"question":"What compliance documentation does Texas Instruments provide for the BQ40Z80RSMT?","answer":"The part is ROHS3 compliant per the manufacturer's declaration. No additional REACH, UL, or IEC certification is listed in the standard product documentation for this order code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ40Z80RSMT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ40Z80RSMT when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}