{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM337LMX","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM337LMX","canonicalUrl":"https://icboms.com/texas-instruments/LM337LMX","factsUrl":"https://icboms.com/api/mcp/products/LM337LMX","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM337LMX negative adjustable voltage regulator, 100 mA output, -1.2 V to -37 V range, PSRR 60 dB at 120 Hz, 8-SOIC surface-mount package, -25°C to 125°C operating range.","salesMarkdown":"## Negative rail regulator in SOIC-8 — the 100 mA load ceiling The LM337LMX is a negative adjustable voltage regulator in an 8-SOIC surface-mount package, delivering up to 100 mA of output current with a PSRR of 60 dB at 120 Hz. It regulates an output adjustable from -1.2 V down to -37 V, with a maximum input voltage of -40 V. The 60 dB PSRR at 120 Hz means the regulator attenuates full-wave-rectified ripple by a factor of 1000. For a -24 V rail with 1 Vpp of 120 Hz ripple on the input, the output sees roughly 1 mVpp of ripple — adequate for most analog signal chains but not low-noise instrumentation. If the load draws near the 100 mA ceiling, the dropout voltage rises and the PSRR degrades; the datasheet curve (not reproduced here) shows the trade-off. ## NRND status — lifecycle reality for the BOM The LM337LMX carries a Not Recommended for New Design (NRND) status. Texas Instruments has flagged this part for end-of-life transition — it is not intended for new product designs. Existing production BOMs should plan a last-time-buy window and qualify a replacement before the part is formally discontinued. ## Package and temperature — board-fit checklist At 100 mA output with a 30 V input-to-output differential, the power dissipation is 3 W, which exceeds the SOIC-8's capability without a heatsink or forced air — derate the output current or reduce the differential for sustained operation.","metaTitle":"LM337LMX Negative Adjustable Regulator, 100 mA, 8-SOIC, NRND","metaDescription":"LM337LMX negative adjustable voltage regulator, 100 mA output, PSRR 60 dB at 120 Hz, -1.2 V to -37 V range, 8-SOIC surface mount.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","PSRR":"60dB (120Hz)","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Product Status":"Not For New Designs","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"100mA","Base Product Number":"LM337","Protection Features":"Over Temperature, Short Circuit","Number of Regulators":"1","Output Configuration":"Negative","Operating Temperature":"-25°C~125°C","Voltage - Input (Max)":"-40V","Voltage Dropout (Max)":"-","Voltage - Output (Max)":"-37V","Supplier Device Package":"8-SOIC","Voltage - Output (Min/Fixed)":"-1.2V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.3100","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/56f5cd2381b15dfce00eeb97931fe2ab.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM337LMX/alternatives.json"},"ai":{"faq":[{"question":"What is the output current of the LM337LMX?","answer":"The LM337LMX is rated for a maximum output current of 100 mA. This is the continuous ceiling; actual usable current depends on the input-to-output voltage differential and ambient temperature due to thermal limits in the SOIC-8 package."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM337LMX","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM337LMX 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}}