{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ2057TSNTR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ2057TSNTR","canonicalUrl":"https://icboms.com/texas-instruments/BQ2057TSNTR","factsUrl":"https://icboms.com/api/mcp/products/BQ2057TSNTR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ2057 series, Lithium Ion/Polymer battery charger IC, Surface Mount, 1 ~ 2 cells, 4.1V pack voltage, 4mA max charge current, -20°C~70°C operating temperature.","salesMarkdown":"## Li-Ion/Polymer charger — 4.1 V pack, 4 mA ceiling The Texas Instruments BQ2057TSNTR is a linear charge-management IC for single- or dual-cell Lithium Ion/Polymer battery packs, targeting a 4.1 V full-charge voltage. The charge current is constant and programmable, with a maximum of 4 mA — a low-current profile suited for small-capacity cells or trickle-charge applications. On-chip fault protection covers over-current and over-temperature conditions, reducing external supervisory circuitry. ## Obsolete — sourcing through independent distribution The BQ2057TSNTR carries an obsolete product status. No official successor or cross-reference is recorded in the available documentation. The maximum supply voltage is 15 V. Operating temperature range is -20°C to 70°C.","metaTitle":"BQ2057TSNTR Li-Ion/Polymer Charger IC, 4.1V, 4mA Max","metaDescription":"Texas Instruments BQ2057TSNTR Li-Ion/Polymer battery charger IC, 4.1V pack voltage, 4mA max charge current, 1-2 cells.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Series":"BQ2057","Package":"Bulk","Interface":"-","Mounting Type":"Surface Mount","Package / Case":"-","Product Status":"Obsolete","Number of Cells":"1 ~ 2","lifecycle_stage":"eol_hot","Fault Protection":"Over Current, Over Temperature","Battery Chemistry":"Lithium Ion/Polymer","Current - Charging":"Constant - Programmable","Base Product Number":"BQ2057","Battery Pack Voltage":"4.1V","Charge Current - Max":"4mA","Operating Temperature":"-20°C~70°C","Programmable Features":"Current","Voltage - Supply (Max)":"15V","Supplier Device Package":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://rocelec.widen.net/view/pdf/yw8kqnfrma/slus025f.pdf?t.download=true&u=5oefqw","sourceUrl":null},"ai":{"faq":[{"question":"What is the charge current rating for BQ2057TSNTR?","answer":"The maximum charge current is 4 mA, constant and programmable. This is a low-current charger intended for small-capacity Li-Ion/Polymer cells."},{"question":"Is BQ2057TSNTR compatible with 2-cell batteries?","answer":"Yes, the part supports 1 to 2 cells in series, with a battery pack voltage of 4.1 V."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ2057TSNTR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ2057TSNTR 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}}