{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM337KTPR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM337KTPR","canonicalUrl":"https://icboms.com/texas-instruments/LM337KTPR","factsUrl":"https://icboms.com/api/mcp/products/LM337KTPR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM337KTPR, negative adjustable voltage regulator, 1.5 A output, -1.2 V to -37 V range, 77 dB PSRR at 120 Hz, TO-252-3 surface-mount package, 0°C to 125°C operating temperature.","salesMarkdown":"## Negative rail workhorse — now obsolete The Texas Instruments LM337KTPR is a negative adjustable voltage regulator delivering up to 1.5 A output current with an output range from -1.2 V down to -37 V, making it a standard choice for generating a clean negative rail in bipolar supply designs. Its 77 dB PSRR at 120 Hz provides meaningful ripple rejection on the negative rail, which matters for analog front-ends and audio circuits where supply noise couples into the signal path. ## 1.5 A output in a DPAK footprint Built-in over-temperature and short-circuit protection allow the part to survive a momentary output short without external crowbar circuitry. ## Sourcing an obsolete negative regulator No official successor is listed on the record; for new designs, consider the LM337 family in an active package variant or a pin-compatible negative regulator from the same functional class. Current availability is limited to independent-distribution inventory and surplus stock.","metaTitle":"LM337KTPR Negative Adjustable Regulator, 1.5 A, TO-252-3","metaDescription":"LM337KTPR is an obsolete negative adjustable voltage regulator rated for 1.5 A output with 77 dB PSRR at 120 Hz. TO-252-3 surface-mount package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","PSRR":"77dB (120Hz)","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"TO-252-3, DPak (2 Leads + Tab), SC-63","Product Status":"Obsolete","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":"0°C~125°C","Voltage - Input (Max)":"-40V","Voltage Dropout (Max)":"-","Voltage - Output (Max)":"-37V","Supplier Device Package":"TO-252-3","Voltage - Output (Min/Fixed)":"-1.2V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8270dc2f1113b75c824a9330ade9fadb.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM337KTPR/alternatives.json"},"ai":{"faq":[{"question":"Is LM337KTPR obsolete and what is the replacement?","answer":"Yes, the LM337KTPR is listed as obsolete by Texas Instruments. No official direct replacement part number is provided in the lifecycle record. For a drop-in alternative, look at other LM337 family variants in active status or a pin-compatible negative adjustable regulator in a TO-252-3 package — verify the output voltage range and current rating match your BOM requirements before committing."},{"question":"What is the LM337KTPR's PSRR rating?","answer":"The LM337KTPR has a PSRR of 77 dB at 120 Hz, which is the standard line-frequency ripple rejection figure for this class of adjustable negative regulator. This means the output ripple is attenuated by a factor of about 7000 at 120 Hz relative to the input ripple."},{"question":"Is LM337KTPR suitable for negative voltage regulation at 1.5 A?","answer":"Yes, the LM337KTPR is rated for a continuous output current of 1.5 A."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM337KTPR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM337KTPR 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}}