{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ27505YZGT-J2","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ27505YZGT-J2","canonicalUrl":"https://icboms.com/texas-instruments/BQ27505YZGT-J2","factsUrl":"https://icboms.com/api/mcp/products/BQ27505YZGT-J2","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ27505YZGT-J2, Impedance Track™ series, single-cell Li-Ion battery monitor, I²C interface, 12-DSBGA package, -40°C to 85°C operating temperature.","salesMarkdown":"## Why this fuel gauge exists — and the mistake it avoids The BQ27505YZGT-J2 is a single-cell Li-Ion battery monitor that uses TI's Impedance Track™ algorithm rather than a simple voltage-to-capacity lookup. That matters because a voltage-based gauge will report a higher remaining capacity on a cell that's actually at a lower state-of-charge under load — the IR drop fools the ADC. Impedance Track™ compensates for battery impedance, discharge rate, temperature, and aging, so the reported state-of-charge stays accurate across the cell's life. It communicates over I²C, which keeps the pin count low on the host MCU. ## Single-cell Li-Ion — and only single-cell This part is designed for exactly one series cell (1S). If your BOM calls for a 2S or 4S pack, the BQ2084DBT-V143 handles 2 to 4 cells but uses an SMBus interface and a wider temperature range of -20°C to 85°C. Neither is a drop-in replacement for the BQ27505YZGT-J2. For a new design this means no immediate sourcing risk; for a sustaining BOM it means the line is stable. ## Package and layout — the 12-DSBGA gotcha The 12-DSBGA package (0.4 mm pitch, 0.5 mm ball diameter) requires a via-in-pad or microvia PCB stack-up. If your board uses a 2-layer design with 0.3 mm drills, you will struggle to fan out all 12 balls without shorting to the ground plane. Plan for at least a 4-layer board with filled vias under the BGA.","metaTitle":"BQ27505YZGT-J2 Battery Monitor – TI Impedance Track™, I²C","metaDescription":"Texas Instruments BQ27505YZGT-J2 single-cell Li-Ion battery fuel gauge with Impedance Track™ algorithm. I²C interface, 12-DSBGA package, -40°C to 85°C.","metaKeywords":null},"attributes":{"series":"Impedance Track™","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Series":"Impedance Track™","Package":"Tape & Reel (TR); Cut Tape (CT)","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":"$9.2100","priceTiers":[{"qty":1,"price":"$9.21000","currency":"USD"},{"qty":10,"price":"$8.31800","currency":"USD"},{"qty":25,"price":"$7.93160","currency":"USD"},{"qty":100,"price":"$6.88680","currency":"USD"},{"qty":250,"price":"$6.57728","currency":"USD"},{"qty":500,"price":"$5.99696","currency":"USD"},{"qty":1250,"price":"$5.47500","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/d5a6ba9f9faad59ef1c9b4bd365e797e.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BQ27505YZGT-J2/alternatives.json"},"ai":{"faq":[{"question":"Can BQ27505YZGT-J2 be used with 4.2V Li-Ion single cells?","answer":"Yes. The BQ27505YZGT-J2 is designed for single-cell (1S) Lithium Ion chemistry. The standard 4.2 V full-charge voltage is within the expected operating range of the Impedance Track™ algorithm. The gauge automatically learns the cell's impedance curve over the first few charge/discharge cycles."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ27505YZGT-J2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ27505YZGT-J2 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}}