{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TL431CPWE4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TL431CPWE4","canonicalUrl":"https://icboms.com/texas-instruments/TL431CPWE4","factsUrl":"https://icboms.com/api/mcp/products/TL431CPWE4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TL431CPWE4, adjustable shunt voltage reference, ±2.2% tolerance, 100 mA output, 8-TSSOP surface-mount package, 0°C to 70°C operating temperature.","salesMarkdown":"## Shunt reference in an 8-TSSOP — what the ±2.2% tolerance buys you The TL431CPWE4 is a three-terminal adjustable shunt regulator from the TL431 family, delivering a 2.495 V reference that can be set to any value up to 36 V with two external resistors. The ±2.2% tolerance on the reference voltage is tighter than the standard ±1% grade found in many TL431 variants, which matters when the output voltage accuracy of a switching power supply or linear regulator feedback loop depends on that initial tolerance. ## Output current and cathode current — the drive and bias budget Rated for 100 mA continuous output current, the TL431CPWE4 can sink enough current to drive the optocoupler LED in an isolated flyback supply or the bias network of a linear post-regulator. The minimum cathode current is 1 mA — below that the device drops out of regulation, so the external resistor from cathode to the supply rail must be sized to keep at least 1 mA flowing even at no load. ## Package and temperature grade — board-fit constraints Housed in an 8-TSSOP (0.173\", 4.40 mm width) surface-mount package, the TL431CPWE4 is a compact option for space-constrained boards. ## Lifecycle reality — obsolete, sourced to order TI lists the TL431CPWE4 as obsolete.","metaTitle":"TL431CPWE4 Shunt Voltage Reference, Adjustable, ±2.2%","metaDescription":"TL431CPWE4 adjustable shunt reference, ±2.2% tolerance, 100 mA output, 8-TSSOP. Check replacement options.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Analog & Data Acquisition"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tube","Tolerance":"±2.2%","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"8-TSSOP (0.173\\\", 4.40mm Width)","Product Status":"Obsolete","Reference Type":"Shunt","Voltage - Input":"-","lifecycle_stage":"eol_hot","Current - Output":"100 mA","Current - Supply":"-","Current - Cathode":"1 mA","Base Product Number":"TL431","Noise - 0.1Hz to 10Hz":"-","Noise - 10Hz to 10kHz":"-","Operating Temperature":"0°C~70°C(TA)","Voltage - Output (Max)":"36 V","Supplier Device Package":"8-TSSOP","Temperature Coefficient":"-","Voltage - Output (Min/Fixed)":"2.495V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/99b53f28cf28b982a16c2a9ac87cd6e9.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TL431CPWE4/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy TL431CPWE4?","answer":"TL431CPWE4 is obsolete per TI's lifecycle status. No stock-holding claim is made; each order is quoted against the BOM quantity."},{"question":"Is TL431CPWE4 obsolete?","answer":"Yes, TL431CPWE4 is listed as obsolete by Texas Instruments."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TL431CPWE4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TL431CPWE4 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}}