{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2737MTCX/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2737MTCX-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM2737MTCX-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM2737MTCX%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2737MTCX/NOPB, Buck Controller, Step-Down (Buck), 1 Output, Transistor Driver, 50kHz ~ 2MHz, 90% Duty Cycle, Synchronous Rectifier, 14-TSSOP, -40°C ~ 125°C.","salesMarkdown":"## Buck controller for 5 V rails — what the specs tell the BOM engineer The Texas Instruments LM2737MTCX/NOPB is a current-mode step-down (buck) PWM controller designed for point-of-load regulation from a 4.5 V to 5.5 V supply rail. It drives an external N-channel MOSFET and includes a synchronous rectifier driver, eliminating the freewheeling Schottky diode typical in older designs. The part is in a 14-TSSOP package, rated for junction temperatures from -40°C to 125°C, making it suitable for industrial and automotive under-hood environments even without a separate AEC-Q qualification. ## Switching frequency from 50 kHz to 2 MHz — inductor sizing trade-off The LM2737's switching frequency is programmable from 50 kHz to 2 MHz via an external resistor. At the low end, you use a larger inductor but get lower switching losses; at 2 MHz the inductor shrinks to a small footprint part, but gate-drive losses and core losses climb. For a typical 5 V to 1.8 V / 3 A rail, 300-500 kHz is a common sweet spot that balances inductor size and efficiency. ## 90% duty cycle and synchronous rectification A maximum duty cycle of 90% means the output can be as high as 4.95 V from a 5.5 V input, useful for low-dropout scenarios. The built-in synchronous rectifier driver (high-side and low-side) improves efficiency by 3-5% over a diode-based design at heavy loads, and eliminates the external Schottky — saving about 2-3 cents and a diode footprint per rail. ## Control features reduce external component count Integrated control features include current limit (cycle-by-cycle), enable pin for sequencing, frequency control (via resistor), a power-good output for rail monitoring, and a soft-start pin to limit inrush. These reduce the need for external supervisory ICs and RC delay circuits, simplifying the BOM and layout. ## Active lifecycle — no last-time-buy pressure TI lists the LM2737MTCX/NOPB as Active. The ROHS3 compliance covers EU and China regulatory requirements. For new designs, this part carries no imminent obsolescence risk, though the narrow 5 V supply range means it is a fixed-rail controller, not a wide-input part.","metaTitle":"LM2737MTCX/NOPB Buck Controller, 50kHz-2MHz, 14-TSSOP","metaDescription":"TI LM2737MTCX/NOPB step-down buck controller, 4.5-5.5V supply, 50kHz-2MHz switching, synchronous rectifier, -40 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","Clock Sync":"No","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"14-TSSOP (0.173\\\", 4.40mm Width)","lifecycle_stage":"eol_hot","Control Features":"Current Limit, Enable, Frequency Control, Power Good, Soft Start","Duty Cycle (Max)":"90%","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"50kHz ~ 2MHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"Yes","Supplier Device Package":"14-TSSOP","Voltage - Supply (Vcc/Vdd)":"4.5V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.89","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.89000","currency":"USD"},{"qty":10,"price":"$1.69900","currency":"USD"},{"qty":25,"price":"$1.60320","currency":"USD"},{"qty":100,"price":"$1.36600","currency":"USD"},{"qty":250,"price":"$1.28260","currency":"USD"},{"qty":500,"price":"$1.12228","currency":"USD"},{"qty":1000,"price":"$0.92988","currency":"USD"},{"qty":2500,"price":"$0.90750","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/4b3823d6ae4614371f7c71fab2005d36.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the switching frequency range of LM2737MTCX/NOPB?","answer":"The switching frequency is programmable from 50 kHz to 2 MHz via an external timing resistor."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2737MTCX-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/LM2737MTCX-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}