{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TB67S549FTG,EL","brand":"Toshiba Semiconductor","brandSlug":"toshiba","productSlug":"TB67S549FTGEL","canonicalUrl":"https://icboms.com/toshiba/TB67S549FTGEL","factsUrl":"https://icboms.com/api/mcp/products/TB67S549FTG%2CEL","rawCanonicalId":null},"summary":{"shortDescription":"Toshiba Semiconductor TB67S549FTG,EL bipolar stepper motor driver IC, fully integrated control and power stage, 1.2 A output, 4.5-33 V supply, 1/32 microstepping, DMOS, 24-VFQFN exposed pad, Tape & Reel.","salesMarkdown":"## Motor current and microstepping — the fit decision The TB67S549FTG,EL is a fully integrated bipolar stepper motor driver with a 1.2 A continuous output rating per phase. That 1.2 A figure is the RMS current the DMOS output stage can sustain without thermal shutdown at 25°C ambient — for a NEMA 17 or small NEMA 23 motor with a phase current around 1 A, this driver runs with margin; for a motor rated 1.5 A or higher, the driver will current-limit and you lose torque at speed. Microstepping resolution goes from full-step down to 1/32 step, which means the motor can position in 32 discrete increments per full electrical step. For a 200-step/rev motor running at 1/32 microstepping, the effective steps per revolution become 6400 — smooth low-speed rotation and finer positioning than a 1/8 or 1/16 driver can deliver, at the cost of slightly higher switching losses in the DMOS stage. ## Supply range and load voltage tolerance The driver accepts a motor supply voltage from 4.5 V to 33 V, and the logic supply runs off the same rail. That 4.5 V floor means it can operate from a 5 V regulated bus or a lithium-ion cell near depletion; the 33 V ceiling covers 24 V industrial rails with margin for transients. The DMOS output stage's breakdown voltage must stay above the peak bus voltage — at 33 V max, the margin against a 24 V rail with 10 % regulation is about 6.6 V, comfortable for most factory-floor supplies. The output configuration is two half-bridges — one per phase of a bipolar stepper motor. Each half-bridge switches the motor winding between the supply rail and ground through the DMOS FETs, with PWM control from the interface pin. The PWM interface accepts a step/direction or clock-in signal; the internal sequencer generates the microstep current profiles. ## Package, thermal path, and board integration Without that pad connection, the thermal resistance rises and the driver will current-limit or shut down at lower ambient temperatures. The DMOS technology's on-resistance increases with junction temperature — at 85°C ambient, the effective Rds(on) can be 1.5× the 25°C value, so the I²R losses in the output stage rise and the available torque at speed drops. Budget the thermal derating into the motor sizing if the driver sits in a warm enclosure.","metaTitle":"Toshiba TB67S549FTG,EL Stepper Driver, 1.2A, 1/32 Microstep","metaDescription":"Toshiba TB67S549FTG,EL bipolar stepper motor driver IC, 1.2 A output, 4.5-33 V supply, 1/32 microstepping, DMOS, QFN-24. Active production, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Driver - Fully Integrated, Control and Power Stage","Interface":"PWM","Technology":"DMOS","Applications":"General Purpose","Mounting Type":"Surface Mount","Package / Case":"24-VFQFN Exposed Pad","Voltage - Load":"4.5V ~ 33V","Step Resolution":"1 ~ 1/32","lifecycle_stage":"eol_hot","Current - Output":"1.2A","Voltage - Supply":"4.5V ~ 33V","Motor Type - AC, DC":"Brushed DC","Motor Type - Stepper":"Bipolar","Output Configuration":"Half Bridge (2)","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"24-QFN (4x4)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.03","stockQuantity":16,"priceTiers":[{"qty":1,"price":"$2.03000","currency":"USD"},{"qty":10,"price":"$1.82600","currency":"USD"},{"qty":25,"price":"$1.72240","currency":"USD"},{"qty":100,"price":"$1.46760","currency":"USD"},{"qty":250,"price":"$1.37800","currency":"USD"},{"qty":500,"price":"$1.20576","currency":"USD"},{"qty":1000,"price":"$0.99905","currency":"USD"},{"qty":4000,"price":"$0.97500","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/6d7a14b38c522cb281c598730bebcc22.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest functional alternative to TB67S549FTG,EL?","answer":"The TB67S539FTG(O,EL) is the nearest peer in Toshiba's stepper driver family. It offers a higher output current (2.0 A vs 1.2 A) and uses four half-bridges instead of two, which means it drives a bipolar stepper with separate control for each winding — functionally similar but not pin-compatible. The TB67S549FTG,EL has a 4.5-33 V supply range; the TB67S539 runs from a 6 V supply. A board designed for the TB67S549 will not accept the TB67S539 without layout changes."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/toshiba/TB67S549FTGEL","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/toshiba/TB67S549FTGEL when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}