TL431

@@ -3,8 +3,9 @@   "type": "component",   "slug": "tl431",   "title": "TL431",-  "brief": "Programmable precision voltage reference, SOT-23 / TO-92",+  "brief": "TI adjustable precision shunt regulator, SOT-23. Vref 2.5 V, programmable to 36 V, sinks 1-100 mA. Datasheet-verified.",   "version": "0.1.0",+  "license": "CC-BY-SA-4.0",   "tags": [     "component",     "voltage-reference",@@ -13,36 +14,88 @@     "sot-23",     "texas-instruments"   ],-  "license": "MIT",   "component": {     "mpn": "TL431",     "manufacturer": "Texas Instruments",-    "package": "SOT-23",-    "pin_count": null,-    "category": "library",-    "subcategory": "",-    "body_size": null,-    "parts": {},-    "distributor_links": {}+    "package": "SOT-23 (DBZ)",+    "pin_count": 3,+    "category": "Power Management",+    "subcategory": "Adjustable shunt voltage reference",+    "datasheet": "https://www.ti.com/lit/ds/symlink/tl431.pdf",+    "parts": {+      "symbol": "tl431.kicad_sym",+      "footprint": "tl431.kicad_mod",+      "model_3d": "tl431.glb"+    },+    "distributor_links": {},+    "pins": [+      {+        "number": "1",+        "name": "K",+        "type": "passive",+        "description": "Shunt cathode (K). Current-sink terminal referenced to ANODE; V(KA) may range from Vref (~2.5 V) up to the absolute-max 37 V. Continuous cathode current I(KA) = 1 mA to 100 mA in normal operation (abs-max \u2212100 to 150 mA). Sinks current when V(REF-ANODE) exceeds Vref, regulating V(KA) at the value set by the external divider."+      },+      {+        "number": "2",+        "name": "REF",+        "type": "input",+        "description": "Reference (feedback) input, threshold relative to ANODE. Internal error amp regulates V(REF) to Vref (~2.5 V nominal, 0.5%/1%/2% grades). Reference input current I(ref) is very small (abs-max \u22120.05 to 10 mA); typically driven from a resistor divider between CATHODE and ANODE to program V(KA) = Vref \u00d7 (1 + R1/R2) + I(ref)\u00b7R1."+      },+      {+        "number": "3",+        "name": "A",+        "type": "passive",+        "description": "Common return terminal (A), normally connected to circuit ground. All device voltages (V(KA), V(REF)) are referenced to ANODE. Carries the sum of cathode sink current and reference-input current."+      }+    ],+    "provenance": {+      "extractor": "ds2sf",+      "datasheet": {+        "url": "https://www.ti.com/lit/ds/symlink/tl431.pdf",+        "pages": 85,+        "sha256": "49d4bc6e1bdcfab7",+        "source_tier": "mfr"+      },+      "cad": "KiCad official (CC-BY-SA 4.0)",+      "pins": {+        "total": 3,+        "described": 3,+        "cites_pages": true,+        "refuses_to_fabricate": true+      }+    },+    "viewers": {+      "symbol": "viewers/symbol.html",+      "footprint": "viewers/footprint.html"+    }   },-  "readme": "# TL431\n\nProgrammable precision voltage reference, SOT-23 / TO-92\n\nThe TL431 is a programmable shunt voltage reference from TI. Adjustable from 2.5V to 36V with 0.5% initial accuracy. Used in power supply feedback circuits, voltage references, and current limiters.",+  "metadata": {+    "specs": {+      "Type": "Adjustable shunt voltage reference",+      "Reference voltage (Vref)": "2.5 V (typ 2.495 V)",+      "Output range": "Vref to 36 V (external divider)",+      "Cathode current": "1 mA to 100 mA",+      "Output impedance": "0.2 \u03a9 typ",+      "Package": "SOT-23 (DBZ)",+      "Body (L\u00d7W\u00d7H)": "2.9 \u00d7 1.3 \u00d7 1.1 mm"+    }+  },+  "discovery_triggers": [+    "tl431",+    "shunt voltage reference",+    "adjustable zener",+    "supply feedback reference"+  ],+  "discovery_pitch": "TL431 adjustable precision shunt regulator (SOT-23) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",   "author": {-    "name": "Kyle Bergstedt",-    "email": "[email protected]"+    "name": "Ray",+    "email": "[email protected]"   },-  "visibility": "public",+  "dependencies": {},   "hero": {     "type": "image",     "path": "docs/hero.png"   },-  "sample_prompts": [],-  "discovery_triggers": [],-  "discovery_pitch": null,-  "metadata": {},-  "created_at": "2026-05-28T05:34:20.354Z",-  "updated_at": "2026-05-28T05:34:20.354Z",-  "description": "TI adjustable precision shunt regulator, SOT-23. Vref 2.5 V, programmable to 36 V, sinks 1-100 mA. Datasheet-verified.",-  "dependencies": {},   "files": [     "page.json",     "README.md",