{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BQ24257RGER","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"BQ24257RGER","canonicalUrl":"https://icboms.com/texas-instruments/BQ24257RGER","factsUrl":"https://icboms.com/api/mcp/products/BQ24257RGER","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments BQ24257RGER single-cell multi-chemistry battery charger, 2A max charge current, I²C and USB interface, 24-VQFN Exposed Pad, -40°C to 85°C.","salesMarkdown":"## Single-cell charger with I²C and USB control The Texas Instruments BQ24257RGER is a single-cell, multi-chemistry battery charger that accepts input from a USB port or a DC adapter, with the charge current programmable up to 2 A via the I²C interface. The device integrates fault protection against over-temperature and over-voltage conditions, and includes a programmable timer for charge termination. ## 2 A charge current and 4.44 V battery regulation The maximum charge current of 2 A sets the charge-time floor for a single-cell Li-ion or Li-poly pack; the battery regulation voltage tops out at 4.44 V, which covers the standard 4.2 V and 4.35 V cell chemistries with margin. The I²C interface allows the host microcontroller to adjust the charge current, set the timer, and read status registers — useful for dynamic thermal management or input current limiting when powered from a USB host. ## NRND — plan for a replacement This means TI will continue to support existing designs but advises against using this part in new projects. For new designs, evaluate the BQ24259 or BQ24261 series as pin-compatible alternatives within the same charger family — confirm the exact package and feature set against the BOM requirements. ## 24-VQFN package and supply range The supply input accepts up to 6.5 V, covering standard 5 V USB and 5 V wall adapters.","metaTitle":"BQ24257RGER single-cell charger, 2A max, I²C/USB, NRND","metaDescription":"Texas Instruments BQ24257RGER single-cell Li-ion charger with 2A max charge current, I²C and USB interface, 24-VQFN package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Interface":"I²C, USB","Mounting Type":"Surface Mount","Package / Case":"24-VFQFN Exposed Pad","Product Status":"Not For New Designs","Number of Cells":"1","lifecycle_stage":"eol_hot","Fault Protection":"Over Temperature, Over Voltage","Battery Chemistry":"Multi-Chemistry","Current - Charging":"Constant - Programmable","Base Product Number":"BQ24257","Battery Pack Voltage":"4.44V (Max)","Charge Current - Max":"2A","Operating Temperature":"-40°C~85°C(TA)","Programmable Features":"Timer","Voltage - Supply (Max)":"6.5V","Supplier Device Package":"24-VQFN (4x4)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.0400","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/17ba585d526919b204848b207beec98c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is BQ24257RGER obsolete?","answer":"TI still supports existing designs, but the part is not recommended for new projects."},{"question":"What is the replacement for BQ24257RGER?","answer":"TI recommends evaluating the BQ24259 or BQ24261 series as pin-compatible replacements within the same charger family. Confirm the exact package and feature set against your BOM before substituting."},{"question":"What is the maximum charge current of BQ24257RGER?","answer":"The maximum charge current is 2 A, programmable via the I²C interface."},{"question":"Does BQ24257RGER support USB charging?","answer":"Yes, the device accepts input from a USB port and communicates over I²C, allowing the host to set input current limits compliant with USB standards."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/BQ24257RGER","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/BQ24257RGER 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}}