{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM337IMPX/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM337IMPX-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM337IMPX-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM337IMPX%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM337IMPX/NOPB, negative adjustable linear regulator, 1.5A output, -1.2V to -37V range, 60dB PSRR at 120Hz, SOT-223-4 surface mount, -40°C to 125°C.","salesMarkdown":"## Negative rail in a SOT-223-4 footprint The LM337IMPX/NOPB is a negative adjustable linear regulator from Texas Instruments, delivering up to 1.5 A output with an adjustable range from -1.2 V down to -37 V. The SOT-223-4 surface-mount package fits into compact PCB layouts. The 60 dB PSRR at 120 Hz means this regulator attenuates full-wave-rectified ripple by a factor of 1000. For a -15 V rail feeding an op-amp front end, that keeps the 120 Hz hum component well below the noise floor of a 16-bit ADC. If the design already has a post-filter LC stage, the 60 dB figure gives you margin to relax the inductor DCR or capacitor ESR budget. ## Output voltage range and current — sizing the rail The minimum output is -1.2 V (the internal reference voltage), and the maximum is -37 V, set by two external resistors. The 1.5 A output current rating is continuous; the part includes over-temperature and short-circuit protection. The SOT-223-4 package has a thermal pad on the tab; a 1-inch² copper pour on the PCB drops the thermal resistance enough to deliver 1.5 A at 125°C ambient without hitting the thermal shutdown threshold. For volume production, the Tape & Reel option (standard for SOT-223-4) keeps the pick-and-place running without a reel change.","metaTitle":"LM337IMPX/NOPB Negative Adjustable Regulator, 1.5A","metaDescription":"Texas Instruments LM337IMPX/NOPB negative adjustable linear regulator, 1.5A output, -1.2V to -37V range, 60dB PSRR at 120Hz. SOT-223-4, active.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","PSRR":"60dB (120Hz)","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"TO-261-4, TO-261AA","Product Status":"Active","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"1.5A","Base Product Number":"LM337","Protection Features":"Over Temperature, Short Circuit","Number of Regulators":"1","Output Configuration":"Negative","Operating Temperature":"-40°C~125°C","Voltage - Input (Max)":"-40V","Voltage Dropout (Max)":"-","Voltage - Output (Max)":"-37V","Supplier Device Package":"SOT-223-4","Voltage - Output (Min/Fixed)":"-1.2V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.0300","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/0778c63670ae2b9da77d4109fe26090b.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM337IMPX%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"Is LM337IMPX/NOPB RoHS compliant?","answer":"The NOPB suffix in the order code indicates lead-free / RoHS-compliant finish. No separate RoHS certificate is cited here, but the suffix is the manufacturer's standard RoHS designation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM337IMPX-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/LM337IMPX-NOPB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}