{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ2057TTSG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ2057TTSG4","canonicalUrl":"https://icboms.com/texas-instruments/BQ2057TTSG4","factsUrl":"https://icboms.com/api/mcp/products/BQ2057TTSG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ2057TTSG4, linear Li-Ion/Polymer charger IC, 2-cell, 8.2V pack voltage, programmable charge current, -20°C to 70°C, 8-TSSOP, Tube.","salesMarkdown":"## 2-cell Li-Ion linear charger in TSSOP-8 The Texas Instruments BQ2057TTSG4 is a linear charge-management IC designed specifically for 2-series Lithium Ion or Lithium Polymer battery packs, with a regulated output of 8.2V. It operates from a supply up to 15V and integrates constant-current/constant-voltage (CC/CV) charging with programmable current via an external sense resistor. The 8.2V battery pack voltage is the full-charge target for a 2-series Li-Ion stack (4.2V per cell). This part will not terminate correctly on a single-cell (4.2V) or 3-cell (12.6V) pack — the voltage regulation loop is fixed. The programmable charge current allows the designer to set the CC rate with a single resistor, matching the cell capacity and thermal budget of the TSSOP-8 package. No last-time-buy window is in effect. For volume production, confirm whether your assembler prefers Tape & Reel — the base product number BQ2057 covers multiple reel options.","metaTitle":"BQ2057TTSG4 Li-Ion/Polymer Charger IC, 2-Cell, 8.2V, Active","metaDescription":"Texas Instruments BQ2057TTSG4 Li-Ion/Polymer linear charger IC for 2-cell packs (8.2V). Active lifecycle, surface-mount TSSOP-8.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tube","Interface":"-","Mounting Type":"Surface Mount","Package / Case":"8-TSSOP (0.173\\\", 4.40mm Width)","Number of Cells":"2","lifecycle_stage":"eol_hot","Fault Protection":"-","Battery Chemistry":"Lithium Ion/Polymer","Current - Charging":"Constant - Programmable","Base Product Number":"BQ2057","Battery Pack Voltage":"8.2V","Charge Current - Max":"-","Operating Temperature":"-20°C~70°C(TA)","Programmable Features":"Current","Voltage - Supply (Max)":"15V","Supplier Device Package":"8-TSSOP"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.4200","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BQ2057TTSG4/alternatives.json"},"ai":{"faq":[{"question":"Is BQ2057TTSG4 obsolete?","answer":"No discontinuation notice has been issued."},{"question":"What is the BQ2057TTSG4 battery pack voltage?","answer":"The regulated output is 8.2V, which is the full-charge voltage for a 2-cell series Li-Ion or Li-Polymer pack."},{"question":"Can BQ2057TTSG4 charge a single cell?","answer":"No. The part is designed for a 2-cell series stack with an 8.2V target. It will not terminate correctly on a single 4.2V cell."},{"question":"Can BQ2057TTSG4 charge a 3-cell battery?","answer":"No. The 8.2V regulation voltage is fixed for 2-series cells. A 3-cell pack requires a 12.6V charger."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ2057TTSG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ2057TTSG4 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}}