{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ2057DGKRG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ2057DGKRG4","canonicalUrl":"https://icboms.com/texas-instruments/BQ2057DGKRG4","factsUrl":"https://icboms.com/api/mcp/products/BQ2057DGKRG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ2057DGKRG4 single-cell Li-Ion/Polymer linear charger IC, 4.1V battery pack voltage, programmable charge current, -20°C to 70°C, 8-TSSOP/MSOP package.","salesMarkdown":"## Single-cell Li-Ion/Polymer linear charger — 4.1V regulation target The BQ2057DGKRG4 from Texas Instruments is a linear charge-management IC for single-cell Lithium Ion or Lithium Polymer battery packs, with a fixed regulation voltage of 4.1V. Charge current is programmable via an external sense resistor, making it adaptable to different cell capacities and charge-time targets. The device operates over -20°C to 70°C ambient, which covers handheld instruments, portable medical gear, and consumer electronics that stay indoors or in moderate outdoor conditions. ## Obsolete — sourcing through independent distribution Texas Instruments has classified the BQ2057DGKRG4 as Obsolete. No last-time-buy window remains open from the factory. For BOM lines that still specify this order code, the only channel is the independent surplus market. No official replacement or pin-compatible successor is listed by TI; any alternate must be qualified against the original design's 4.1V regulation and 8-TSSOP footprint. ## Package and mounting — 8-TSSOP/MSOP for tight layouts Surface-mount assembly with standard reflow profiles; the small footprint suits space-constrained single-cell charger designs where board area is at a premium.","metaTitle":"BQ2057DGKRG4 Li-Ion/Polymer Charger IC, Obsolete, 4.1V","metaDescription":"Texas Instruments BQ2057DGKRG4 single-cell Li-Ion/Polymer charger IC. 4.1V regulation, programmable current, -20°C to 70°C range.","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)","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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fbq2057","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy BQ2057DGKRG4 and get a price?","answer":"The BQ2057DGKRG4 is obsolete and no longer available from the factory. We source it through independent distribution channels. Submit an RFQ; we confirm availability and current pricing at the time of quote. No stock-holding claim is made — each order is sourced per request."},{"question":"Is BQ2057DGKRG4 compatible with 4.2V Li-ion cells?","answer":"No. The BQ2057DGKRG4 regulates the battery pack voltage to a fixed 4.1V. Charging a 4.2V Li-ion cell to only 4.1V will leave it undercharged (roughly 80-85% capacity). For 4.2V cells, look for a charger IC with a 4.2V regulation setpoint."},{"question":"What is the replacement for BQ2057DGKRG4?","answer":"Texas Instruments has not listed an official replacement or pin-compatible successor for the BQ2057DGKRG4. Any alternate must be qualified against the original design's 4.1V regulation voltage, programmable current feature, and 8-TSSOP/MSOP footprint. We can help identify candidate parts from the broader BQ2057 family or other TI charger ICs upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ2057DGKRG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ2057DGKRG4 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}}