{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2937IMPX-10/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM2937IMPX-10-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LM2937IMPX-10-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LM2937IMPX-10%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM2937IMPX-10/NOPB, fixed 10 V positive linear regulator, 400 mA output, SOT-223-4 surface-mount package, active production.","salesMarkdown":"## Fixed 10 V output — no adjustment, no divider The LM2937IMPX-10/NOPB is a fixed 10 V positive linear regulator. There are no adjust pins, no external resistor divider — the output voltage is set internally to 10 V, ±2 % typical. If your BOM calls for a 10 V rail to power an analog front-end, a sensor bias, or a relay coil supply, this is the regulator; if you need 3.3 V or 5 V, look elsewhere in the LM2937 family. Output current is rated at 400 mA. That is enough for a handful of op-amps, a small relay bank, or a 10 V reference pre-regulator, but not enough for a microcontroller core or a multi-amp load. Plan your load budget to stay below 400 mA continuous, and derate for ambient temperature above 25 °C — the SOT-223-4 package has a thermal resistance around 60 °C/W junction-to-ambient on a standard two-layer board. ## Dropout and input headroom — 1 V at 50 mA, not at 400 mA The datasheet lists maximum dropout as 1 V at 50 mA. For a 10 V output, plan for an input voltage of at least 11.5 V to 12 V to stay in regulation across temperature and load. The absolute maximum input is 26 V, so a 12 V rail or a 15 V unregulated supply is safe. Compared to a low-dropout regulator like the LP5907UVX-3.3/NOPB (which has a dropout of 120 mV at 250 mA), the LM2937 is not a true LDO. It is a standard NPN-pass regulator with a Darlington output stage — the dropout voltage is the Vce(sat) of the pass transistor plus the base-drive overhead. That means the input rail must be at least 1 V above the output at light load, and more at full load. ## Protection features — over-temp, reverse polarity, short circuit The LM2937 includes over-temperature shutdown, reverse-polarity protection, and output short-circuit current limiting. The reverse-polarity block is notable: if the input voltage is accidentally reversed, the regulator limits reverse current to a few milliamps instead of letting the pass transistor conduct heavily. That saves an external series diode on the input, which would otherwise add a 0.6 V drop and waste power. That is not a micropower regulator — for battery-operated designs drawing microamps, look at the LP5907 family. But for a 10 V rail fed from a 12 V bus, 2 mA Iq is negligible. The centre tab is the output pin and also the main thermal path — solder it to a copper pour on the PCB to improve heat dissipation. The LM2937IMPX-10/NOPB is the tape-and-reel variant; the cut-tape version is also available. The base product number is LM2937, so the same die is used across the LM2937 family — only the output voltage and package change. That means the BOM line is safe for new designs and production runs — no last-time-buy scramble, no successor search.","metaTitle":"LM2937IMPX-10/NOPB — TI Fixed 10 V 400 mA LDO, SOT-223-4","metaDescription":"Texas Instruments LM2937IMPX-10/NOPB: fixed 10 V output, 400 mA, 1 V dropout at 50 mA, SOT-223-4. Active production, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","PSRR":"-","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"TO-261-4, TO-261AA","Product Status":"Active","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"400mA","Base Product Number":"LM2937","Protection Features":"Over Temperature, Reverse Polarity, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C~85°C","Voltage - Input (Max)":"26V","Voltage Dropout (Max)":"1V @ 50mA","Current - Supply (Max)":"20 mA","Voltage - Output (Max)":"-","Supplier Device Package":"SOT-223-4","Current - Quiescent (Iq)":"2 mA","Voltage - Output (Min/Fixed)":"10V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.1600","priceTiers":[{"qty":1,"price":"$2.26000","currency":"USD"},{"qty":10,"price":"$2.03400","currency":"USD"},{"qty":25,"price":"$1.91840","currency":"USD"},{"qty":100,"price":"$1.63460","currency":"USD"},{"qty":250,"price":"$1.53488","currency":"USD"},{"qty":500,"price":"$1.34302","currency":"USD"},{"qty":1000,"price":"$1.11279","currency":"USD"},{"qty":2000,"price":"$1.08600","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/fa0d88b5b31623656f74345e6f33b73f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM2937IMPX-10%2FNOPB/alternatives.json"},"ai":{"faq":[{"question":"Can the LM2937IMPX-10/NOPB be replaced by the LP5907UVX-3.3/NOPB?","answer":"No — the LP5907UVX-3.3/NOPB outputs 3.3 V, not 10 V. The LM2937 is a higher-voltage, higher-current NPN regulator; the LP5907 is a low-dropout CMOS regulator for lower voltages. They are not functional substitutes."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM2937IMPX-10-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/LM2937IMPX-10-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}}