{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM337T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM337T","canonicalUrl":"https://icboms.com/texas-instruments/LM337T","factsUrl":"https://icboms.com/api/mcp/products/LM337T","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics LM337T, adjustable negative voltage regulator, 1.5A output, -1.2V to -37V range, 77dB PSRR at 120Hz, TO-220-3 through-hole, 0°C~125°C operating temperature.","salesMarkdown":"## Negative rail regulator — why the LM337T exists The LM337T is a three-terminal adjustable negative voltage regulator from STMicroelectronics, the complement to the ubiquitous LM317 positive regulator. It delivers up to 1.5A output current with an adjustable output range from -1.2V down to -37V, making it the go-to part for generating a clean negative rail from a negative input supply as low as -40V. A single external resistor divider sets the output voltage, and the 77dB PSRR at 120Hz provides meaningful ripple rejection for analog supplies feeding op-amps, ADCs, or audio circuits that need a quiet negative rail. ## Output current and voltage — sizing the rail Rated for 1.5A continuous output, the LM337T handles moderate loads like a small analog front-end or a local negative rail for a sensor signal chain. The minimum output voltage is -1.2V (the internal reference), and the maximum is -37V, set by the input voltage ceiling of -40V. The TO-220-3 package with a metal tab can dissipate several watts with a heatsink attached — the tab is the output pin, so the heatsink carries the output potential and must be electrically isolated or the system ground scheme accounted for. ## Protection and temperature range Built-in over-temperature shutdown and short-circuit current limiting protect the regulator and the load from fault conditions, reducing the need for external protection diodes in many designs. For new designs, a pin-compatible negative adjustable regulator from another manufacturer (such as the LM337 series from TI, ON Semiconductor, or Microchip) should be evaluated for form-fit-function replacement.","metaTitle":"LM337T TO-220-3 Adjustable Negative Regulator, 1.5A","metaDescription":"LM337T adjustable negative voltage regulator, 1.5A output, -1.2V to -37V range, 77dB PSRR at 120Hz. TO-220-3 through-hole. Request quote.","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":"Tube","Output Type":"Adjustable","Mounting Type":"Through Hole","Package / Case":"TO-220-3","Product Status":"Not For New Designs","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-220-3","Voltage - Output (Min/Fixed)":"-1.2V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.2400","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/0778c63670ae2b9da77d4109fe26090b.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM337T/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy LM337T and what is the price?","answer":"The LM337T is obsolete and sourced through independent distribution. No stock or price figure is published here."},{"question":"Is LM337T obsolete? What is its lifecycle status?","answer":"Yes, the LM337T is listed as obsolete by STMicroelectronics. No official successor is recorded. For new designs, evaluate a pin-compatible LM337 from another manufacturer."},{"question":"What is the output current and voltage range of LM337T?","answer":"The LM337T delivers up to 1.5A output current with an adjustable output range from -1.2V to -37V, from a maximum input voltage of -40V."},{"question":"Is LM337T compatible with positive voltage regulator LM317?","answer":"The LM337T is the negative complement to the LM317 positive regulator. They share the same three-terminal adjustable topology and external resistor-divider programming, but the LM337T operates from a negative input and produces a negative output. They are not pin-compatible or directly interchangeable — each serves its own rail polarity."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM337T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM337T 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}}