{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ST1PS03A1QTR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"ST1PS03A1QTR","canonicalUrl":"https://icboms.com/stmicroelectronics/ST1PS03A1QTR","factsUrl":"https://icboms.com/api/mcp/products/ST1PS03A1QTR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics ST1PS03A1QTR, Step-Down Buck, 400 mA output, 1.8V to 5.5V input, Selectable output, Synchronous Rectifier, -40°C to 125°C, 12-TQFN (1.7x2) package, Surface Mount, ROHS3.","salesMarkdown":"## Package and footprint reality The 12-TQFN with a 1.7x2 mm body is a fine-pitch, no-lead package. The exposed pad must be soldered to a copper plane on the PCB to carry the heat from the 400 mA output at high step-down ratios. The supplier device package is listed as 12-TQFN (1.7x2). ## Lifecycle and sourcing posture The ST1PS03A1QTR carries an Active lifecycle status with ROHS3 compliance.","metaTitle":"ST1PS03A1QTR Step-Down Buck Regulator, 400 mA, 12-TQFN","metaDescription":"STMicroelectronics ST1PS03A1QTR is a 400 mA step-down buck converter in a 12-TQFN package. Input range 1.8V to 5.5V, -40°C to 125°C. Active, ROHS3.","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","Output Type":"Selectable","Mounting Type":"Surface Mount","Package / Case":"12-UFQFN","lifecycle_stage":"eol_hot","Current - Output":"400mA","Number of Outputs":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"Yes","Voltage - Input (Max)":"5.5V","Voltage - Input (Min)":"1.8V","Voltage - Output (Max)":"3.3V","Supplier Device Package":"12-TQFN (1.7x2)","Voltage - Output (Min/Fixed)":"1.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.08","priceTiers":[{"qty":1,"price":"$2.08000","currency":"USD"},{"qty":10,"price":"$1.87000","currency":"USD"},{"qty":25,"price":"$1.76440","currency":"USD"},{"qty":100,"price":"$1.50330","currency":"USD"},{"qty":250,"price":"$1.41156","currency":"USD"},{"qty":500,"price":"$1.23512","currency":"USD"},{"qty":1000,"price":"$1.02339","currency":"USD"},{"qty":3000,"price":"$0.95281","currency":"USD"},{"qty":6000,"price":"$0.91753","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/549022a8f2ad1c05fbc3f8a596189c18.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/ST1PS03A1QTR/alternatives.json"},"ai":{"faq":[{"question":"What is the output current rating of ST1PS03A1QTR?","answer":"The ST1PS03A1QTR is rated for 400 mA output. This is the continuous current capability at the selected output voltage within the 1.6V to 3.3V range."},{"question":"What input voltage range does ST1PS03A1QTR support?","answer":"The input voltage range is 1.8V minimum to 5.5V maximum. This covers single Li-ion, 3.3V, and 5V rails with margin."},{"question":"What package does ST1PS03A1QTR come in?","answer":"It is supplied in a 12-TQFN package with a 1.7x2 mm body, surface-mount. The shipping options include Tape & Reel (TR) and Cut Tape (CT)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/ST1PS03A1QTR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/ST1PS03A1QTR 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}}