{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"IR21531STR","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"IR21531STR","canonicalUrl":"https://icboms.com/infineon/IR21531STR","factsUrl":"https://icboms.com/api/mcp/products/IR21531STR","rawCanonicalId":null},"summary":{"shortDescription":"Infineon IR21531STR half-bridge gate driver, N-Channel MOSFET, synchronous channel, RC input, 600 V bootstrap, 10-15.6 V supply, 80/45 ns rise/fall, -40 to 125°C, 8-SOIC, Tape & Reel.","salesMarkdown":"## 600 V bootstrap — the DC-link ceiling The IR21531STR is a half-bridge gate driver from Infineon (formerly International Rectifier) designed to drive a pair of N-channel MOSFETs in a synchronous half-bridge configuration. Its 600 V bootstrap rating sets the maximum DC-link voltage the high-side driver can float on — nominally suited for 230 VAC offline supplies, PFC stages, and motor-drive inverter rails where the bus sits below 400 VDC. ## 80 ns rise, 45 ns fall — switching-speed budget At switching frequencies up to 100 kHz, these edges keep the overlap conduction period short enough that the driver's 10 V to 15.6 V supply rail can replenish the bootstrap capacitor between cycles without significant droop. The two drivers are internally matched for propagation delay, which simplifies dead-time calculation — the datasheet's timing diagrams are the reference for setting the RC network values that prevent shoot-through. ## Industrial temperature grade — deployment envelope The 8-SOIC package keeps the board footprint compact, though the 0.154-inch body width limits creepage between the high-side and low-side ground traces — a 4-layer PCB with a dedicated ground plane is the typical layout choice. Infineon lists the IR21531STR as obsolete. The closest functional equivalent in the same family is the IR2153 — it shares the same half-bridge architecture, RC input, and 600 V bootstrap rating, but the IR21531 variant includes additional features such as shutdown capability. Pin compatibility should be verified against the respective datasheets before substituting. For new designs, the IR2153 or a newer-generation half-bridge driver from Infineon's current portfolio (e.g. the IRS series) is the recommended path.","metaTitle":"IR21531STR Half-Bridge Gate Driver, 600 V Bootstrap, 8-SOIC","metaDescription":"IR21531STR half-bridge gate driver with 600 V bootstrap, 80/45 ns rise/fall, -40 to 125°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Infineon Technologies","Series":"-","Package":"Tape & Reel (TR)","Gate Type":"N-Channel MOSFET","Input Type":"RC Input Circuit","Channel Type":"Synchronous","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Voltage - Supply":"10V ~ 15.6V","Number of Drivers":"2","Base Product Number":"IR21531","Driven Configuration":"Half-Bridge","Operating Temperature":"-40°C ~ 125°C (TJ)","Rise / Fall Time (Typ)":"80ns, 45ns","Supplier Device Package":"8-SOIC","Logic Voltage - VIL, VIH":"-","High Side Voltage - Max (Bootstrap)":"600 V","Current - Peak Output (Source, Sink)":"-"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/IR21531STR/alternatives.json"},"ai":{"faq":[{"question":"What is the best replacement for IR21531STR?","answer":"The closest functional equivalent in the same family is the IR2153, which also uses an RC input circuit and drives a half-bridge of N-channel MOSFETs with a 600 V bootstrap. The IR21531 variant includes a shutdown pin that the IR2153 lacks — verify pin compatibility against both datasheets before substituting. For new designs, consider Infineon's current IRS series half-bridge drivers."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/IR21531STR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/IR21531STR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}