{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM5158QRTERQ1","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM5158QRTERQ1","canonicalUrl":"https://icboms.com/texas-instruments/LM5158QRTERQ1","factsUrl":"https://icboms.com/api/mcp/products/LM5158QRTERQ1","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM5158QRTERQ1, Automotive AEC-Q100, multi-topology DC-DC converter, boost/flyback/SEPIC, adjustable output, 3.26A switch, 16-WFQFN exposed pad, tape and reel.","salesMarkdown":"## What AEC-Q100 grade and temperature range does it hold? The LM5158QRTERQ1 carries the Automotive, AEC-Q100 designation — this means it has passed the full suite of qualification stresses (pre- and post-cond, HTOL, HAST, TC, ESD) per the AEC-Q100 specification, with the PPAP documentation chain intact for OEM submission. ROHS3 compliance is confirmed — the part meets the latest EU Directive for hazardous-substance restriction, including the four phthalates added in ROHS3. ## Input/output voltage envelope and topology flexibility The input range spans 1.5 V minimum to 60 V maximum — the 1.5 V floor lets it start from a single-cell alkaline or a deeply discharged Li-ion cell, while the 60 V ceiling covers a 12 V/24 V automotive bus with load-dump transients without needing an external clamp. Output can be adjusted from the 1.5 V reference up to 83 V maximum — this 83 V headroom supports a 48 V telecom bus, a 72 V nominal LED string, or a flyback winding that needs a regulated high-voltage rail. The controller supports boost, flyback, and SEPIC topologies — SEPIC is particularly useful for automotive input where the battery voltage can be above or below the target output (e.g., 12 V input to 12 V output with a diode drop), without the polarity inversion of a buck-boost. For a boost from 12 V to 24 V at 85% efficiency, the average input current at the limit is roughly 2.8 A, delivering about 28 W output. Switching frequency is programmable from 100 kHz to 2.2 MHz — the lower end suits high step-up ratios where the switch off-time needs to be long enough to transfer energy through the transformer, while 2.2 MHz keeps the magnetics small enough for a 16-WQFN layout but pushes the gate-drive losses up. No synchronous rectifier is integrated — the external diode adds a forward-voltage drop that reduces efficiency at high output current, but simplifies the BOM and avoids the shoot-through risk that plagues synchronous boost stages during start-up. ## Package and thermal management for the 16-WQFN The junction-to-board thermal resistance is typically around 40°C/W with a 1-square-inch pad; without the pad connection the switch current derates sharply above 85°C. ## Active lifecycle and sourcing posture The TPS65261RHBT is a different part entirely — it is a triple-output buck converter with synchronous rectification, a 4.5 V minimum input, and a maximum output of 0.6 V to 3.3 V. It does not share the boost/flyback/SEPIC topology, the 1.5 V minimum input, or the 83 V output capability of the LM5158QRTERQ1. No pin-compatible or functional second-source relationship exists between them.","metaTitle":"TI LM5158QRTERQ1 Boost/Flyback/SEPIC, 3.26A, AEC-Q100","metaDescription":"Texas Instruments LM5158QRTERQ1 automotive multi-topology DC-DC converter, 1.5V-60V input, 83V max out, 3.26A switch, -40°C to 125°C, AEC-Q100. Active, ROHS3.","metaKeywords":null},"attributes":{"series":"Automotive, AEC-Q100","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Series":"Automotive, AEC-Q100","Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Step-Up, Step-Up/Step-Down","Topology":"Boost, Flyback, SEPIC","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"16-WFQFN Exposed Pad","lifecycle_stage":"eol_hot","Current - Output":"3.26A (Switch)","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"100kHz ~ 2.2MHz","Operating Temperature":"-40°C ~ 125°C (TA)","Synchronous Rectifier":"No","Voltage - Input (Max)":"60V","Voltage - Input (Min)":"1.5V","Voltage - Output (Max)":"83V","Supplier Device Package":"16-WQFN (3x3)","Voltage - Output (Min/Fixed)":"1.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.97","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$4.97000","currency":"USD"},{"qty":10,"price":"$4.46100","currency":"USD"},{"qty":25,"price":"$4.21760","currency":"USD"},{"qty":100,"price":"$3.65540","currency":"USD"},{"qty":250,"price":"$3.46792","currency":"USD"},{"qty":500,"price":"$3.11176","currency":"USD"},{"qty":1000,"price":"$2.62438","currency":"USD"},{"qty":3000,"price":"$2.49316","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/8f326a03fb37ff1db2db18d121af9306.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy LM5158QRTERQ1 and how do I get a price?","answer":"The LM5158QRTERQ1 is an active Texas Instruments part available through authorized and independent distribution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM5158QRTERQ1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM5158QRTERQ1 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}}