{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM5642XMH/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM5642XMH-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM5642XMH-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM5642XMH%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM5642XMH/NOPB dual-phase synchronous buck controller, 4.5V to 36V input, 375kHz switching frequency, 28-PowerTSSOP package, Tube.","salesMarkdown":"## Dual-phase synchronous buck controller for high-current rails The Texas Instruments LM5642XMH/NOPB is a dual-phase synchronous buck controller that steps down a 4.5V to 36V input rail to a regulated positive output. The two interleaved phases share the load current, which cuts input ripple and lets you use smaller input capacitors than a single-phase design handling the same total current. With synchronous rectification built in, the external low-side FET replaces the catch diode, keeping efficiency above 90% across most of the load range. ## Control features and output configuration The controller includes current limiting, an enable pin for sequencing, and a soft-start ramp that prevents inrush on power-up. The two outputs are independently configurable, so one controller can generate two different positive voltages from the same input bus. Clock synchronization (clock sync = yes) lets you lock the switching edge to an external clock, which is handy when you need to place the switching noise in a quiet band for an RF or analog section sharing the board.","metaTitle":"Texas Instruments LM5642XMH/NOPB Buck Controller, 375kHz","metaDescription":"Texas Instruments LM5642XMH/NOPB dual-phase synchronous buck controller. 4.5V-36V input, 375kHz switching, -40°C to 125°C. Active production, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tube","Function":"Step-Down","Topology":"Buck","Clock Sync":"Yes","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"2","Package / Case":"28-PowerTSSOP (0.173\\\", 4.40mm Width)","lifecycle_stage":"eol_hot","Control Features":"Current Limit, Enable, Soft Start","Duty Cycle (Max)":"98.9%","Number of Outputs":"2","Output Configuration":"Positive","Frequency - Switching":"375kHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"Yes","Supplier Device Package":"28-HTSSOP","Voltage - Supply (Vcc/Vdd)":"4.5V ~ 36V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.71","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$5.71000","currency":"USD"},{"qty":10,"price":"$5.12900","currency":"USD"},{"qty":25,"price":"$4.84880","currency":"USD"},{"qty":100,"price":"$4.20220","currency":"USD"},{"qty":250,"price":"$3.98672","currency":"USD"},{"qty":500,"price":"$3.57726","currency":"USD"},{"qty":1000,"price":"$3.04950","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/d38686ea43fe111eafd904b27add4e29.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the LM5642XMH/NOPB used for?","answer":"The two interleaved phases suit it for point-of-load converters feeding FPGAs, ASICs, or processors that draw 10A to 20A and need low ripple."},{"question":"What is the operating frequency of LM5642XMH/NOPB?","answer":"The switching frequency is fixed at 375 kHz. The controller also supports clock synchronization, so you can drive the switching edge from an external clock if needed."},{"question":"Is LM5642XMH/NOPB lead-free?","answer":"Yes — the NOPB suffix indicates ROHS3 compliance, meaning the part is lead-free and meets the latest RoHS directive requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM5642XMH-NOPB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM5642XMH-NOPB 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}}