{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ2057TTS","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ2057TTS","canonicalUrl":"https://icboms.com/texas-instruments/BQ2057TTS","factsUrl":"https://icboms.com/api/mcp/products/BQ2057TTS","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ2057TTS, 2-cell Lithium Ion/Polymer charger IC, constant-current programmable, 8.2V battery pack voltage, 8-TSSOP package, -20°C to 70°C operating range.","salesMarkdown":"## 2-cell Li-Ion charger in 8-TSSOP The BQ2057TTS is a Texas Instruments linear charger IC designed specifically for 2-series Lithium Ion or Lithium Polymer battery packs, terminating at 8.2V. The charge current is set by an external resistor — constant-current programmable — so you size the resistor for your pack capacity and thermal budget. The 8-TSSOP package keeps the footprint small, but the linear topology means the pass element dissipates the voltage drop times charge current as heat; a 500 mA charge from a 12V supply drops roughly 3.8V across the internal FET, so the thermal pad on the PCB layout matters for sustained charging. ## Temperature range and sourcing posture ## Mounting and footprint Surface Mount in the 8-TSSOP package (0.173\", 4.40mm width). The supply voltage maximum is 15V, so the input rail can be a 12V wall adapter or a 5V USB port — but the linear dropout means the input must stay above the battery voltage plus the dropout of the internal pass element.","metaTitle":"BQ2057TTS Texas Instruments Li-Ion Charger IC, 2-Cell","metaDescription":"BQ2057TTS from Texas Instruments: 2-cell Li-Ion/Polymer charger IC, constant-current programmable, 8.2V pack voltage, -20°C to 70°C, 8-TSSOP. Active production.","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)","Product Status":"Active","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":"$4.1100","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/BQ2057TTS/alternatives.json"},"ai":{"faq":[{"question":"How many cells does BQ2057TTS charge?","answer":"It charges 2-series cells, terminating at 8.2V. It is not designed for single-cell or 3+ cell packs."},{"question":"How to program the charge current for BQ2057TTS?","answer":"The charge current is constant-current programmable via an external resistor connected between the PROG pin and ground. The resistor value sets the current; refer to the datasheet formula for the exact resistor-to-current relationship."},{"question":"Is BQ2057TTS obsolete or end-of-life?","answer":"No — the product status is Active. No end-of-life notice or last-time-buy has been issued by Texas Instruments."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ2057TTS","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ2057TTS 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}}