{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"REG101NA-A/250","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"REG101NA-A-250","canonicalUrl":"https://icboms.com/texas-instruments/REG101NA-A-250","factsUrl":"https://icboms.com/api/mcp/products/REG101NA-A%2F250","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments REG101NA-A/250 adjustable LDO voltage regulator, 100 mA output, 0.13 V dropout at full load, 65 dB PSRR (120 Hz), SOT-23-5 package, -40 to 85 °C.","salesMarkdown":"## Active production — 100 mA adjustable LDO in SOT-23-5 The REG101NA-A/250: The SOT-23-5 footprint matches the common pinout for this class of linear regulator, so a board already laid out for a generic adjustable LDO in this package accepts the part without a respin. Maximum dropout is 0.13 V at the full 100 mA load — that 130 mV headroom between input and output means the regulator stays in regulation with a 3.3 V rail feeding a 3.0 V output, or a 5.0 V rail feeding a 4.75 V output. Below that margin the output drops out of spec. Power-supply rejection ratio is 65 dB at 120 Hz, the fundamental ripple frequency from a full-wave rectified 60 Hz line. That means the regulator attenuates 1 V of input ripple to roughly 560 µV at the output — enough to keep an analog front-end or a precision reference from coupling line-frequency hum into the signal chain. The quiescent current is 500 µA typical with a 650 µA maximum supply current. For a battery-powered board drawing 50 mA from the output, the regulator's own consumption adds about 1% to the total load — negligible for most designs but worth noting if the system sleeps at microamp levels. ## Protection features and operating range Built-in over-current and over-temperature protection means the part folds back rather than letting the smoke out if a downstream short or a hot spot pushes it past the safe operating area. The enable pin lets a GPIO or a supervisor IC gate the output — useful for sequencing multiple rails at power-up. The SOT-23-5 package dissipates about 300 mW in still air at 25 °C; at 85 °C ambient the power derates to roughly 200 mW before the thermal shutdown trips.","metaTitle":"Texas Instruments REG101NA-A/250 LDO Regulator, 100mA","metaDescription":"Active Texas Instruments REG101NA-A/250 adjustable LDO regulator, 100mA output, 0.13V dropout, 65dB PSRR. SOT-23-5 package. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"PSRR":"65dB (120Hz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"SC-74A, SOT-753","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"100mA","Protection Features":"Over Current, Over Temperature","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 85°C","Voltage - Input (Max)":"10V","Voltage Dropout (Max)":"0.13V @ 100mA","Current - Supply (Max)":"650 µA","Voltage - Output (Max)":"5.5V","Supplier Device Package":"SOT-23-5","Current - Quiescent (Iq)":"500 µA","Voltage - Output (Min/Fixed)":"2.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.0","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.00000","currency":"USD"},{"qty":10,"price":"$2.69700","currency":"USD"},{"qty":25,"price":"$2.54960","currency":"USD"},{"qty":100,"price":"$2.20960","currency":"USD"},{"qty":250,"price":"$2.09632","currency":"USD"},{"qty":500,"price":"$1.88102","currency":"USD"},{"qty":1250,"price":"$1.60350","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/492192a688ec1af6267e42c081be8d64.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the PSRR of REG101NA-A/250?","answer":"The power-supply rejection ratio is 65 dB at 120 Hz, which attenuates full-wave rectified line ripple by a factor of roughly 1800."},{"question":"What package does REG101NA-A/250 come in?","answer":"The device is supplied in a SOT-23-5 surface-mount package (SC-74A, SOT-753 case code)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/REG101NA-A-250","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/REG101NA-A-250 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}}