{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ2057WSNTRG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ2057WSNTRG4","canonicalUrl":"https://icboms.com/texas-instruments/BQ2057WSNTRG4","factsUrl":"https://icboms.com/api/mcp/products/BQ2057WSNTRG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ2057WSNTRG4, linear Li-Ion/Polymer battery charger IC, 2-cell, 8.4V pack voltage, programmable charge current, -20°C to 70°C, 8-SOIC package.","salesMarkdown":"## 2-cell Li-Ion linear charger in SOIC-8 The Texas Instruments BQ2057WSNTRG4 is a linear charge-management IC designed for 2-cell Lithium Ion/Polymer battery packs, regulating the float voltage to 8.4V. It delivers a constant charging current that is programmable via an external resistor, suiting it for portable equipment, handheld instruments, and battery-backed systems where a simple, low-noise charging solution is preferred over a switching regulator. ## Charge current and voltage setpoints The 2-cell configuration sets the regulated battery pack voltage at 8.4V, which is the standard termination voltage for a series stack of two Li-Ion or Li-Polymer cells. The charge current is constant and programmable, meaning the designer selects an external sense resistor to set the rate — typically between C/10 and 1C depending on the cell capacity and thermal budget. Maximum supply voltage is 15V, so the input rail should be a regulated 9V to 12V DC source — unregulated wall adapters that sag under load can cause premature termination. ## Package and footprint reality The Tape & Reel (TR) suffix indicates it ships on 13-inch reels, which is the standard format for automated pick-and-place assembly lines. The 8-SOIC package has a moderate thermal impedance — for charge currents above 500 mA, the PCB copper area under the IC should be maximised to keep the junction temperature within the -20°C to 70°C operating envelope.","metaTitle":"BQ2057WSNTRG4 Li-Ion/Polymer Charger IC, 2-Cell 8.4V, SOIC-8","metaDescription":"Texas Instruments BQ2057WSNTRG4 linear charger IC for 2-cell Li-Ion/Polymer packs. 8.4V regulation, programmable current, SOIC-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":"Tape & Reel (TR)","Interface":"-","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm 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":"8.4V","Charge Current - Max":"-","Operating Temperature":"-20°C~70°C(TA)","Programmable Features":"Current","Voltage - Supply (Max)":"15V","Supplier Device Package":"8-SOIC"}},"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 does BQ2057WSNTRG4 compare to BQ2057WSN?","answer":"The BQ2057WSN and BQ2057WSNTRG4 share the same base product number and identical electrical specifications — both are 2-cell Li-Ion linear chargers in SOIC-8. The only difference is the shipping medium: the BQ2057WSN ships in tube packaging, while the BQ2057WSNTRG4 ships on Tape & Reel. For pick-and-place assembly, the TR variant is the standard choice; for hand-assembly or low-volume prototyping, the tube variant may be more convenient. They are direct functional replacements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ2057WSNTRG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ2057WSNTRG4 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}}