TL431AQDBVR

{
  "slug": "tl431aqdbvr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Voltage Reference, SOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "tl431aqdbvr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "tl431aqdbvr.kicad_sym",
    "tl431aqdbvr.kicad_mod",
    "tl431aqdbvr.glb",
    "tl431aqdbvr.step",
    "tl431aqdbvr.lbr",
    "docs/hero.png",
    "docs/tl431aqdbvr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "component": {
    "mpn": "TL431AQDBVR",
    "manufacturer": "Texas Instruments",
    "package": "SOT-23-5",
    "pin_count": 5,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Reference",
    "datasheet": "https://www.ti.com/cn/lit/gpn/tl431",
    "parts": {
      "symbol": "tl431aqdbvr.kicad_sym",
      "footprint": "tl431aqdbvr.kicad_mod",
      "model_3d": "tl431aqdbvr-etched.glb",
      "model_3d_plain": "tl431aqdbvr.glb",
      "model_3d_step": "tl431aqdbvr-etched.step",
      "model_3d_step_plain": "tl431aqdbvr.step",
      "lbr": "tl431aqdbvr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2156592"
    },
    "pins": [
      {
        "number": "1",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection on the TL431 (not TL432) SOT-23-5 (DBV) package, per the pin configuration diagram for TL431, TL431A, TL431B ... DBV."
      },
      {
        "number": "2",
        "name": "NC",
        "type": "unconnected",
        "description": "No functional internal connection; this pin is attached to the die substrate and, per the datasheet footnote, must be connected to ANODE or left open."
      },
      {
        "number": "3",
        "name": "CATHODE",
        "type": "bidirectional",
        "description": "Shunt-regulator I/O (cathode) pin that sinks the parallel current; recommended continuous cathode current is 1 mA to 100 mA while VKA is regulated between Vref (~2.5 V) and 36 V (absolute maximum continuous cathode current −100 mA to 150 mA, absolute maximum VKA 37 V)."
      },
      {
        "number": "4",
        "name": "REF",
        "type": "input",
        "description": "Reference/threshold input measured relative to the common ANODE pin; typical reference input current is 2 µA (max 4 µA) at IKA=10 mA, with an absolute maximum reference input current range of −0.05 mA to 10 mA."
      },
      {
        "number": "5",
        "name": "ANODE",
        "type": "power_in",
        "description": "Common pin that is normally connected to ground/return, forming the current path back from CATHODE through the internal regulator."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin 2 substrate connection has special handling requirement: must be connected to ANODE or left open; CATHODE pin operates as open-collector sink; circuit design must provide pull-up current source for "
        ],
        "pages_sent": 86,
        "cost_usd": 0.9594,
        "at": "2026-09-23T10:47:59"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/tl431",
        "pages": 86,
        "sha256": "313277b9351e61ed",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 5,
        "described": 5,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "tl431aqdbvr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "720a6eab0024069bbee68e7cb4c3ff1149468a34611225cdc852662c5d0ec2b7",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tl431aqdbvr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "95ac9f7c7a7a4605bf92da24832dca378cbffb7093788c6103efe0603dc37289",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}