{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ2057PDGKG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ2057PDGKG4","canonicalUrl":"https://icboms.com/texas-instruments/BQ2057PDGKG4","factsUrl":"https://icboms.com/api/mcp/products/BQ2057PDGKG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ2057PDGKG4, single-cell Lithium Ion/Polymer linear charger IC, 4.1V battery pack voltage, constant-current programmable, 8-VSSOP surface-mount package, tube.","salesMarkdown":"The BQ2057PDGKG4 is a single-cell linear charger for Lithium Ion and Lithium Polymer packs, with a battery regulation voltage of 4.1V — not the more common 4.2V ceiling. That 100 mV difference means it is suited for cells whose top-of-charge voltage is specified at 4.1V, which includes some early-generation and specialty Li-Ion chemistries. Charging current is constant and programmable via an external resistor; the device does not include a charge-termination timer or temperature monitoring on-chip, so the BOM should budget for those functions externally if the application requires them. Supply voltage range extends to 15 V max. ## Package and mounting The 0.65 mm pitch is layout-friendly for two-layer boards, though the thermal pad on the VSSOP variant should be connected to a copper plane for heat spreading during constant-current charging. Operating temperature range is -20°C to 70°C ambient, which covers most portable and consumer equipment but excludes automotive cabin or outdoor enclosure use without active cooling. Texas Instruments has marked the BQ2057PDGKG4 as Obsolete. For existing designs, the procurement path is through independent distribution or excess inventory channels. The tube quantity should be verified against the BOM line quantity to avoid partial-tube shortages.","metaTitle":"BQ2057PDGKG4 Li-Ion Charger IC – Obsolete, Sourcing Options","metaDescription":"Texas Instruments BQ2057PDGKG4 single-cell Li-Ion/Polymer charger, 4.1V battery pack voltage, 8-VSSOP package.","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":"Tube","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":"How can I order the BQ2057PDGKG4 or check stock?","answer":"The BQ2057PDGKG4 is obsolete per Texas Instruments. Submit an RFQ through this listing — availability and lead time are provided as part of the quote, not as a published figure."},{"question":"Does the BQ2057PDGKG4 charge a 4.2V Li-Ion cell?","answer":"No — the battery regulation voltage is 4.1V. Charging a 4.2V cell to only 4.1V will leave it at roughly 80-85% state of charge, which may be acceptable for some applications but will not reach full capacity. If the design requires a 4.2V termination, a different charger IC is needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ2057PDGKG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ2057PDGKG4 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}}