{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"R2J20052NS#W0","brand":"Renesas Electronics","brandSlug":"renesas","productSlug":"R2J20052NS~4W0","canonicalUrl":"https://icboms.com/renesas/R2J20052NS~4W0","factsUrl":"https://icboms.com/api/mcp/products/R2J20052NS%23W0","rawCanonicalId":null},"summary":{"shortDescription":"Renesas Electronics R2J20052NS#W0 single-cell Li-ion battery charger IC, I²C and USB interface, 2.5 A max charge current, 18-PowerUFDFN package, Bulk.","salesMarkdown":"## 2.5 A single-cell Li-ion charger with I²C and USB control The Renesas R2J20052NS#W0 is a single-cell lithium-ion battery charger IC that delivers up to 2.5 A programmable charge current to a 4.2 V termination voltage. The I²C and USB interface lets a host microcontroller set the charge current, monitor charging status, and negotiate USB bus current limits — making this part suitable for portable devices, power banks, and handheld instruments where the charging profile must adapt to the input source. The 5.8 V maximum supply voltage means the IC accepts standard 5 V USB bus power directly, with headroom for cable drop. Over-temperature fault protection shuts down the charger if the die temperature exceeds the safe operating limit, protecting both the IC and the battery during high-current charging in confined enclosures. ## Package and thermal management for board integration Housed in an 18-PowerUFDFN package (3.4 x 4.5 mm, 18-DFN), the IC exposes a large thermal pad on the bottom side. The supplier device package 18-DFN (3.4x4.5) requires a matching copper land and via array under the pad to conduct heat into the PCB ground plane — critical for sustaining the full 2.5 A charge current without thermal foldback.","metaTitle":"Renesas R2J20052NS#W0 Li-ion Charger IC, 2.5A, 18-DFN","metaDescription":"Renesas R2J20052NS#W0 single-cell Li-ion charger IC with I²C/USB interface, 2.5 A max charge current, over-temp protection. Active production. Sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"Not applicable","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Package":"Bulk","Interface":"I²C, USB","Mounting Type":"Surface Mount","Package / Case":"18-PowerUFDFN","Number of Cells":"1","lifecycle_stage":"eol_hot","Fault Protection":"Over Temperature","Battery Chemistry":"Lithium Ion","Current - Charging":"Constant - Programmable","Battery Pack Voltage":"4.2V","Charge Current - Max":"2.5A","Operating Temperature":"-30°C ~ 85°C (TA)","Voltage - Supply (Max)":"5.8V","Supplier Device Package":"18-DFN (3.4x4.5)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.75","stockQuantity":0,"priceTiers":[{"qty":110,"price":"$2.75000","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What battery chemistry and voltage does R2J20052NS#W0 support?","answer":"It charges a single-cell lithium-ion battery to a 4.2 V termination voltage. The charge current is constant-current programmable via I²C up to 2.5 A maximum."},{"question":"What is the R2J20052NS#W0 package and how does it affect thermal performance?","answer":"The IC comes in an 18-PowerUFDFN (3.4 x 4.5 mm) surface-mount package with an exposed thermal pad. For sustained 2.5 A charging, the PCB layout must include thermal vias under the pad to conduct heat into the ground plane — without this, the over-temperature protection may reduce the charge current."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/renesas/R2J20052NS~4W0","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/renesas/R2J20052NS~4W0 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}}