{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ2057DGKR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ2057DGKR","canonicalUrl":"https://icboms.com/texas-instruments/BQ2057DGKR","factsUrl":"https://icboms.com/api/mcp/products/BQ2057DGKR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ2057DGKR, single-cell Li-Ion/Li-Po linear charger IC, 4.1V battery pack voltage, programmable charge current, 8-VSSOP package, -20°C to 70°C operating range.","salesMarkdown":"## Single-cell Li-Ion charger — 4.1V termination, now obsolete The Texas Instruments BQ2057DGKR is a linear single-cell charger IC for Lithium Ion/Polymer packs, terminating at 4.1V. Charge current is constant and programmable via an external resistor — no I²C or SMBus interface, just a resistor to set the rate. ## What the specs mean for your BOM The 4.1V termination voltage is the key fit check: if your design charges 4.2V cells, this part undercharges them to roughly 95% capacity. For 4.1V-rated cells (common in older Li-Ion chemistries and some Li-Po packs), it is a direct match. Operating temperature spans -20°C to 70°C — fine for consumer portable gear, indoor chargers, and handheld instruments. The supply input can go up to 15V, giving headroom for 5V USB or 9V wall-adapter inputs. ## Sourcing an obsolete part No factory lead-time applies — this is a last-time-buy / surplus procurement path.","metaTitle":"BQ2057DGKR Li-Ion/Li-Po Charger IC, 4.1V, Obsolete","metaDescription":"Texas Instruments BQ2057DGKR single-cell Li-Ion/Li-Po charger IC, 4.1V battery pack voltage, programmable current, -20°C to 70°C, 8-VSSOP.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Interface":"-","Mounting Type":"Surface Mount","Package / Case":"8-TSSOP, 8-MSOP (0.118\\\", 3.00mm Width)","Product Status":"Obsolete","Number of Cells":"1","lifecycle_stage":"eol_hot","Fault Protection":"-","Battery Chemistry":"Lithium Ion/Polymer","Current - Charging":"Constant - Programmable","Base Product Number":"BQ2057","Battery Pack Voltage":"4.1V","Charge Current - Max":"-","Operating Temperature":"-20°C~70°C(TA)","Programmable Features":"Current","Voltage - Supply (Max)":"15V","Supplier Device Package":"8-VSSOP"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.3100","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BQ2057DGKR/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the BQ2057DGKR?","answer":"The BQ2057DGKR is obsolete but available through independent distribution."},{"question":"What is the replacement for BQ2057DGKR?","answer":"Texas Instruments has not published an official replacement for this specific order code. Designs needing a 4.1V single-cell Li-Ion charger should evaluate the BQ24040 or BQ24232 families, but verify pinout and programming method — they are not direct pin-to-pin drop-ins."},{"question":"Is the BQ2057DGKR compatible with 4.2V cells?","answer":"No — the battery pack voltage is fixed at 4.1V. Charging a 4.2V cell to 4.1V leaves about 5% capacity unused. For full 4.2V termination, select a charger IC rated for that voltage."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ2057DGKR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ2057DGKR 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}}