{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3370SD-4221/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3370SD-4221-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM3370SD-4221-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM3370SD-4221%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM3370SD-4221/NOPB, dual 600 mA step-down (buck) regulator, fixed 1.8V and 3.3V outputs, 2 MHz switching frequency, 16-WFDFN exposed pad (WSON) package.","salesMarkdown":"## Dual 600 mA buck in a 16-WSON — what it is The LM3370SD-4221/NOPB is a dual-output step-down (buck) regulator from Texas Instruments, delivering 600 mA per channel from a 2.7V to 5.5V input rail. The fixed outputs are 1.8V and 3.3V, so there is no feedback divider to populate — the output voltages are set internally. The synchronous rectifier (internal FETs for both high-side and low-side) eliminates the external Schottky diode and keeps efficiency up at light load. Input range from 2.7V to 5.5V covers single-cell Li-ion, 3.3V or 5V rails. The fixed 1.8V and 3.3V outputs are common for powering the core and I/O of an MCU, FPGA, or wireless SoC from one regulator — no external resistor divider means two fewer components and one less tolerance stack to manage. Operating temperature is -30°C to 85°C, which suits most industrial and commercial enclosures but does not reach the -40°C low end or 105°C/125°C high end that automotive or under-hood designs require. If the board lives in a heated cabinet or outdoor telecom box, this range is fine; if it sits near an engine or in a cold-soak environment, look for an extended-temp variant. ## 16-WSON package — rework notes The 16-WFDFN exposed pad (WSON) package, supplier device package 16-WSON (5x4), has a thermal pad underneath that must be soldered to the PCB ground plane for heat sinking. The pad is large enough that a standard hot-air station can reflow it, but the narrow 0.5 mm pitch leads demand careful alignment — use a fine tip and good flux.","metaTitle":"LM3370SD-4221/NOPB Dual 600mA Step-Down Buck Regulator - TI","metaDescription":"Texas Instruments LM3370SD-4221/NOPB dual 600mA step-down buck regulator in 16-WSON package. Fixed 1.8V/3.3V outputs, 2MHz switching, -30°C to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Step-Down","Topology":"Buck","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"16-WFDFN Exposed Pad","Product Status":"Active","lifecycle_stage":"eol_hot","Current - Output":"600mA","Number of Outputs":"2","Base Product Number":"LM3370","Output Configuration":"Positive","Frequency - Switching":"2MHz","Operating Temperature":"-30°C~85°C(TA)","Synchronous Rectifier":"Yes","Voltage - Input (Max)":"5.5V","Voltage - Input (Min)":"2.7V","Voltage - Output (Max)":"-","Supplier Device Package":"16-WSON (5x4)","Voltage - Output (Min/Fixed)":"1.8V, 3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.1800","priceTiers":[{"qty":1,"price":"$2.18000","currency":"USD"},{"qty":10,"price":"$1.95800","currency":"USD"},{"qty":25,"price":"$1.84720","currency":"USD"},{"qty":100,"price":"$1.57370","currency":"USD"},{"qty":250,"price":"$1.47764","currency":"USD"},{"qty":500,"price":"$1.29294","currency":"USD"},{"qty":1000,"price":"$1.07129","currency":"USD"},{"qty":2000,"price":"$1.04550","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/07e3d7353ec72bea3806cd32612099ea.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3370SD-4221%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"Can the LM3370SD-4221 generate both 1.8V and 3.3V simultaneously?","answer":"Yes. The LM3370SD-4221/NOPB has two independent buck converters with fixed outputs of 1.8V and 3.3V, each rated for 600 mA. They share the same input rail and can run concurrently."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3370SD-4221-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/LM3370SD-4221-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}}