{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ST1PS01FJR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"ST1PS01FJR","canonicalUrl":"https://icboms.com/stmicroelectronics/ST1PS01FJR","factsUrl":"https://icboms.com/api/mcp/products/ST1PS01FJR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics ST1PS01FJR nano-quiescent synchronous step-down buck converter, 400 mA output, 1.8-5.5 V input, fixed output voltages, 2 MHz switching, 8-FlipChip (1.11x1.41 mm).","salesMarkdown":"## Nano-quiescent synchronous buck for battery-powered designs The ST1PS01FJR is a 400 mA nano-quiescent synchronous step-down buck converter from STMicroelectronics, part of the ST1PS01 family. It targets always-on, battery-operated systems where the quiescent current floor directly sets the standby battery life. The 2 MHz fixed switching frequency keeps the inductor and output capacitor small enough for space-constrained wireless sensor nodes and wearable PCBs. Output is fixed at one of four factory-set voltages: 1.05 V, 1.25 V, 1.35 V, or 1.55 V. The synchronous rectifier eliminates the external Schottky diode, saving board area and raising efficiency at light loads. ## Package, temperature grade, and PCB integration Housed in an 8-UFBGA, FCBGA (FlipChip) package with a supplier device package size of 1.11x1.41 mm. The 0.4 mm ball pitch demands a controlled solder-paste stencil and a micro-via-capable PCB stack-up for fan-out. For a second-source hedge within the same family, the ST1PS01HJR shares the same 400 mA output, 2 MHz switching, and 8-FlipChip package, but with a different fixed output voltage set. Confirm the BOM's target voltage before substituting.","metaTitle":"STMicroelectronics ST1PS01FJR Step-Down Buck, 400mA, 2MHz","metaDescription":"STMicroelectronics ST1PS01FJR nano-quiescent synchronous buck converter, 400mA output, 1.8-5.5V input, fixed 1.05/1.25/1.35/1.55V, 2MHz, active production","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Step-Down","Topology":"Buck","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"8-UFBGA, FCBGA","lifecycle_stage":"eol_hot","Current - Output":"400mA","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"2MHz","Operating Temperature":"-40°C ~ 85°C (TA)","Synchronous Rectifier":"Yes","Voltage - Input (Max)":"5.5V","Voltage - Input (Min)":"1.8V","Supplier Device Package":"8-FlipChip (1.11x1.41)","Voltage - Output (Min/Fixed)":"1.05V, 1.25V, 1.35V, 1.55V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.14","priceTiers":[{"qty":1,"price":"$2.14000","currency":"USD"},{"qty":10,"price":"$1.92500","currency":"USD"},{"qty":25,"price":"$1.81600","currency":"USD"},{"qty":100,"price":"$1.54730","currency":"USD"},{"qty":250,"price":"$1.45284","currency":"USD"},{"qty":500,"price":"$1.27124","currency":"USD"},{"qty":1000,"price":"$1.19928","currency":"USD"},{"qty":5000,"price":"$1.19928","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/8caf8c4002ecd1599b93ce683d44f6a4.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/ST1PS01FJR/alternatives.json"},"ai":{"faq":[{"question":"How can I order ST1PS01FJR or check stock?","answer":"Submit an RFQ for a firm delivery commitment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/ST1PS01FJR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/ST1PS01FJR 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}}