{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS61221DCKR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS61221DCKR","canonicalUrl":"https://icboms.com/texas-instruments/TPS61221DCKR","factsUrl":"https://icboms.com/api/mcp/products/TPS61221DCKR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPS61221DCKR step-up boost converter, fixed 3.3V output, 0.7V to 5.5V input, 200mA switch, up to 2MHz switching, synchronous rectification, SC-70-6 package, -40°C to 125°C.","salesMarkdown":"## Boost converter for single-cell battery rails The internal switch is rated for 200 mA, which sets the practical output current ceiling — at 3.3V out from a 1.2V input, expect around 60-70 mA continuous before the switch limit is reached, depending on efficiency. The 0.7V minimum input lets the converter start up and regulate from a nearly depleted single cell, while the 5.5V maximum input means it can also run from a 2S alkaline stack or a USB 5V rail without an upstream LDO. Because the output is fixed at 3.3V, there is no external feedback divider — the BOM saves two resistors and one feedback-node capacitor compared to an adjustable-output boost. ## Temperature grade and package fit Housed in a 6-lead SC-70 (SOT-363) package, it occupies about 2.1 mm × 2.0 mm of board area — small enough for space-constrained wearable and portable designs.","metaTitle":"TPS61221DCKR Texas Instruments Step-Up Boost Converter","metaDescription":"TPS61221DCKR from TI: step-up boost converter, 0.7V min input, fixed 3.3V output, 200mA switch, SC-70-6.","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); Cut Tape (CT)","Function":"Step-Up","Topology":"Boost","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"6-TSSOP, SC-88, SOT-363","Product Status":"Active","lifecycle_stage":"eol_hot","Current - Output":"200mA (Switch)","Number of Outputs":"1","Base Product Number":"TPS61221","Output Configuration":"Positive","Frequency - Switching":"Up to 2MHz","Operating Temperature":"-40°C~125°C(TJ)","Synchronous Rectifier":"Yes","Voltage - Input (Max)":"5.5V","Voltage - Input (Min)":"0.7V","Voltage - Output (Max)":"-","Supplier Device Package":"SC-70-6","Voltage - Output (Min/Fixed)":"3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.2800","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/c57d0f02ab0ce74374402c9069b0cff5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can TPS61221DCKR replace TPS61220 in a boost converter design?","answer":"Both are pin-compatible boost converters in the same SC-70-6 package. The TPS61221DCKR outputs a fixed 3.3V, while the TPS61220 is adjustable — verify the output voltage requirement before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS61221DCKR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS61221DCKR 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}}