{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ27505YZGR-J4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ27505YZGR-J4","canonicalUrl":"https://icboms.com/texas-instruments/BQ27505YZGR-J4","factsUrl":"https://icboms.com/api/mcp/products/BQ27505YZGR-J4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ27505YZGR-J4, Impedance Track™ series, single-cell Li-Ion battery monitor, I²C interface, 12-DSBGA package, -40°C to 85°C operating temperature.","salesMarkdown":"## Single-cell Li-Ion fuel gauge in a 12-DSBGA package The Texas Instruments BQ27505YZGR-J4 is a single-cell Lithium Ion battery monitor from the Impedance Track™ series. It reports remaining capacity and state-of-charge over an I²C interface, and is designed for portable devices where accurate fuel gauging extends run time. The 12-DSBGA package (0.5 mm pitch, 2.0 mm × 2.5 mm body) saves board area but demands careful solder-paste stencil design and X-ray inspection for reliable reflow. For a single-source fuel gauge on a production BOM, this means no forced redesign cycle in the near term. ## What the I²C interface and Impedance Track™ mean for the BOM The I²C interface lets a host MCU read voltage, current, temperature, and state-of-charge without an ADC pin. The Impedance Track™ algorithm learns battery impedance over discharge cycles, so the reported remaining capacity stays accurate as the cell ages — a clear advantage over voltage-only gauges that drift with temperature and load. Because this is a monitor (not a protector or charger), the BOM still needs a separate battery protection IC and a charger front-end. The gauge sits on the cell side of the protection FET, drawing its supply from the battery itself.","metaTitle":"BQ27505YZGR-J4 Battery Monitor, Impedance Track™, I²C","metaDescription":"Texas Instruments BQ27505YZGR-J4 single-cell Li-Ion battery monitor with Impedance Track™. I²C interface, -40°C to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Series":"Impedance Track™","Package":"Tape & Reel (TR)","Function":"Battery Monitor","Interface":"I²C","Mounting Type":"Surface Mount","Package / Case":"12-UFBGA, DSBGA","Product Status":"Active","Number of Cells":"1","lifecycle_stage":"eol_hot","Fault Protection":"-","Battery Chemistry":"Lithium Ion","Base Product Number":"BQ27505","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"12-DSBGA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.6920","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/a6e2aaef150a96ea3d6d14d3decc9d1f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does BQ27505YZGR-J4 require programming before use?","answer":"Yes. The BQ27505YZGR-J4 must be programmed with the battery chemistry parameters (design capacity, voltage thresholds, impedance table) via the I²C interface before it can report accurate state-of-charge. The manufacturer provides a programming guide and host-side software library for this step."},{"question":"What is the function of BQ27505YZGR-J4 and how does it differ from BQ27500?","answer":"Both are single-cell Impedance Track™ fuel gauges. The BQ27505 adds an integrated current-sense resistor (10 mΩ typical) inside the package, eliminating the external sense resistor needed with the BQ27500. This reduces BOM count and PCB area but fixes the sense resistor value, so the BQ27505 is best for designs where the peak discharge current is known and the 10 mΩ drop is acceptable."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ27505YZGR-J4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ27505YZGR-J4 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}}