{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS40305DRCR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS40305DRCR","canonicalUrl":"https://icboms.com/texas-instruments/TPS40305DRCR","factsUrl":"https://icboms.com/api/mcp/products/TPS40305DRCR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPS40305DRCR, step-down buck controller, 1.2MHz switching frequency, 3V–20V supply, synchronous rectification, 10-VSON (3x3) package, -40°C to 125°C junction temperature.","salesMarkdown":"## What the TPS40305DRCR is and where it fits The Texas Instruments TPS40305DRCR is a single-phase synchronous buck controller designed for step-down regulation from a 3V to 20V supply rail. It drives an external N-channel MOSFET pair and integrates synchronous rectification for higher efficiency at low output voltages — a common requirement in point-of-load (POL) converters for telecom, networking, and industrial equipment. The 1.2 MHz switching frequency lets you use smaller inductors and capacitors, shrinking the board footprint, but demands careful layout to keep switching noise out of sensitive analog sections. Control features include Enable, Power Good, and Soft Start, giving the designer sequenced start-up and fault reporting without extra glue logic. ## 1.2 MHz switching — what it means for the BOM The 1.2 MHz switching rate is the headline parameter for the power-stage design. It pushes the inductor value down into the sub-microhenry range, which shrinks the magnetic component physically and reduces its DC resistance losses. The trade-off is higher switching losses in the FETs and tighter layout constraints to keep the switch node loop small. Plan for a low-ESR ceramic input capacitor close to the drain of the high-side FET and a ground plane under the controller to manage the di/dt edges. The 85% maximum duty cycle limits the step-down ratio at low input voltages — for a 3.3V output from a 5V rail the margin is comfortable, but from a 3.3V input you are near the ceiling.","metaTitle":"TI TPS40305DRCR Buck Controller, 1.2MHz, 10-VSON","metaDescription":"Texas Instruments TPS40305DRCR step-down buck controller, 1.2MHz switching frequency, 3V-20V supply, -40°C to 125°C range, synchronous rectification, 10-VSON","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Step-Down","Topology":"Buck","Clock Sync":"No","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"10-VFDFN Exposed Pad","lifecycle_stage":"eol_hot","Control Features":"Enable, Power Good, Soft Start","Duty Cycle (Max)":"85%","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"1.2MHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"Yes","Supplier Device Package":"10-VSON (3x3)","Voltage - Supply (Vcc/Vdd)":"3V ~ 20V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.57","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.57000","currency":"USD"},{"qty":10,"price":"$2.31200","currency":"USD"},{"qty":25,"price":"$2.18080","currency":"USD"},{"qty":100,"price":"$1.85820","currency":"USD"},{"qty":250,"price":"$1.74476","currency":"USD"},{"qty":500,"price":"$1.52666","currency":"USD"},{"qty":1000,"price":"$1.26495","currency":"USD"},{"qty":3000,"price":"$1.23450","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/ce3c135e22d451db2783681c6fea9406.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is TPS40305DRCR lead-free and RoHS compliant?","answer":"Yes — the TPS40305DRCR is ROHS3 Compliant. The 10-VSON package is compatible with lead-free reflow profiles."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS40305DRCR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS40305DRCR 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}}