{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM5176RHFT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM5176RHFT","canonicalUrl":"https://icboms.com/texas-instruments/LM5176RHFT","factsUrl":"https://icboms.com/api/mcp/products/LM5176RHFT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM5176RHFT synchronous buck-boost controller, 4.2V to 55V supply, single-output transistor driver, 100kHz to 600kHz switching frequency, 28-VFQFN Exposed Pad (5x4 mm), -40°C to 125°C junction temperature.","salesMarkdown":"## Synchronous buck-boost controller for wide-input-rail designs The Texas Instruments LM5176RHFT is a synchronous buck-boost switching regulator controller that regulates a positive output voltage from an input that can be above, below, or equal to the output. Its 4.2 V to 55 V supply range covers 12 V and 24 V industrial buses, automotive battery rails through cold-crank and load-dump, and multi-cell Li-ion battery packs without a cascaded pre-regulator. The controller drives an external transistor pair in a single-inductor, four-switch buck-boost topology with synchronous rectification, which maintains efficiency when the input voltage crosses the output regulation point. Switching frequency is programmable from 100 kHz to 600 kHz and includes a clock sync input for system-level EMI management. Control features on the 28-VFQFN (5x4 mm) package include current limit, enable, frequency control, power-good flag, and a programmable soft start. ## Wide input range — what the 4.2 V to 55 V supply means for your rail budget The 4.2 V minimum supply means this part regulates through the bottom of a 5 V rail during brownout and can run directly from a 4-cell Li-ion battery near its discharge floor. The 55 V maximum covers 24 V industrial rails with 20% tolerance plus transient spikes, and handles automotive 12 V system load-dump events without an external clamp. A buck-boost topology is the right choice when the input can swing both below and above the target output — a simple buck or boost alone would lose regulation at one end of the range. The part is ROHS3 compliant per the current revision. ## Package and thermal — 28-VFQFN with exposed pad Without that stitch, junction temperature rises quickly when the external MOSFETs switch at high duty cycles.","metaTitle":"TI LM5176RHFT Buck-Boost Controller, 4.2V–55V, 100kHz–600kHz","metaDescription":"LM5176RHFT is an active-production synchronous buck-boost controller from TI. 4.2V–55V input, 100kHz–600kHz switching, -40°C to 125°C junction.","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-Up/Step-Down","Topology":"Buck-Boost","Clock Sync":"Yes","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"28-VFQFN Exposed Pad","lifecycle_stage":"eol_hot","Control Features":"Current Limit, Enable, Frequency Control, Power Good, Soft Start","Duty Cycle (Max)":"50%","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"100kHz ~ 600kHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"Yes","Supplier Device Package":"28-VQFN (5x4)","Voltage - Supply (Vcc/Vdd)":"4.2V ~ 55V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$8.79","priceTiers":[{"qty":1,"price":"$8.79000","currency":"USD"},{"qty":10,"price":"$7.94200","currency":"USD"},{"qty":25,"price":"$7.57280","currency":"USD"},{"qty":100,"price":"$6.57550","currency":"USD"},{"qty":250,"price":"$6.27996","currency":"USD"},{"qty":500,"price":"$5.72586","currency":"USD"},{"qty":1250,"price":"$5.22750","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/7b9cb0f319c21e889606c9c9284b0343.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM5176RHFT/alternatives.json"},"ai":{"faq":[{"question":"What is the LM5176RHFT used for?","answer":"It is a synchronous buck-boost controller used to generate a regulated positive output voltage from an input that can be above, below, or equal to the output. Typical applications include automotive battery-fed rails (12 V to 3.3 V or 5 V, and 12 V to 24 V for infotainment), industrial 24 V bus converters, USB-C power delivery source adapters, and battery-powered equipment where the cell voltage crosses the output level during discharge."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM5176RHFT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM5176RHFT 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}}