main
Ray Set visibility: public d7f6655 17d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "cj7812b-tfn-arg",
  "title": "CJ7812B-TFN-ARG",
  "brief": "Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "mpn": "CJ7812B-TFN-ARG",
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    "package": "TO-252-2L",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590918647181357056",
    "parts": {
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      "footprint": "cj7812b-tfn-arg.kicad_mod",
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      "lbr": "cj7812b-tfn-arg.lbr"
    },
    "distributor_links": {
      "lcsc": "C20622091"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T06:06:45Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "IN",
        "type": "power_in",
        "description": "Input of the device; the recommended input voltage range for the CJ7812B is up to 32 V, with an absolute maximum input of 36 V."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Regulator ground."
      },
      {
        "number": "3",
        "name": "OUT",
        "type": "power_out",
        "description": "Output of the device, providing the fixed 12 V output of the CJ7812B with output current up to 1 A at TJ = 25°C."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The package is named TO-252-2L, but the datasheet pin table (and the figure) lists three numbered pi; The page provided does not include the ordering row for the TFN variant. The TFN package code is tak"
        ],
        "pages_sent": 9,
        "cost_usd": 0.0359,
        "at": "2026-10-17T06:06:30"
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      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590918647181357056",
        "pages": 33,
        "sha256": "2bf7e0142c58a2c8",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
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    "viewers": {
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        "file": "cj7812b-tfn-arg.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          9.9,
          6.5,
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        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3eb4c99603a4fe837c2fe9308bc174769ded87a785a0df48d2dc441432ee8b4c",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "sha256": "8df6fc5a351be1d87ae0c2cf7a8eae2c41519fd5d87f9e7c0490c54a209e0ea5",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  "metadata": {
    "specs": {
      "Manufacturer": "Changjing",
      "Package": "TO-252-2L",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "2bf7e0142c58a2c88a01a5d74c1c901610d4be43d3b1c51c9f7df243e6a27d8b",
      "rows": [
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          "name": "Output voltage, TJ = 25°C, ±2% grade",
          "symbol": "VOUT",
          "kind": "electrical",
          "unit": "V",
          "min": 11.75,
          "typ": 12,
          "max": 12.25,
          "conditions": "TJ = 25°C; ±2% grade",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Output voltage over line, load and temperature",
          "symbol": "VOUT",
          "kind": "electrical",
          "unit": "V",
          "min": 11.5,
          "typ": 12,
          "max": 12.5,
          "conditions": "IOUT = 5mA to 1A, VIN = 14.8 to 27V, TJ = -40 to 125°C, PD ≤ 15W",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Line regulation",
          "symbol": "ΔVRLINE",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 25,
          "max": 120,
          "conditions": "VIN = 14.8 to 27V, IOUT = 500mA",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Load regulation",
          "symbol": "ΔVRLOAD",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 40,
          "max": 120,
          "conditions": "VIN = 19V, IOUT = 5mA to 1A",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 3.4,
          "max": 6,
          "conditions": "VIN = 19V, TJ = -40 to 125°C, IOUT = 0mA",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current change",
          "symbol": "ΔIQ",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.1,
          "max": 0.8,
          "conditions": "VIN = 19V, IOUT = 5mA to 1A",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current change",
          "symbol": "ΔIQ",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.3,
          "max": 0.8,
          "conditions": "VIN = 14.8 to 30V, IOUT = 500mA",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Short circuit current",
          "symbol": "ISC",
          "kind": "electrical",
          "unit": "mA",
          "min": 200,
          "typ": null,
          "max": null,
          "conditions": "VIN = 35V, TA = 25°C",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Maximum input voltage range",
          "symbol": "VIN MAX",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 36,
          "conditions": "",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Maximum output current",
          "symbol": "IOUT MAX",
          "kind": "absolute_maximum",
          "unit": "A",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Maximum junction temperature",
          "symbol": "TJ Max",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Soldering temperature",
          "symbol": "Tsolder",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "10s",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Input voltage range, CJ7812B",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 32,
          "conditions": "CJ7812B",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature",
          "symbol": "TJ",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-ambient thermal resistance, TO-252-2L",
          "symbol": "RΘJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 78.9,
          "max": null,
          "conditions": "TO-252-2L; TA = 25°C; soldered on PCB in still air without extra heat dissipation pads",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-case thermal resistance, TO-252-2L",
          "symbol": "RΘJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 5.8,
          "max": null,
          "conditions": "TO-252-2L",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Reference maximum power dissipation for continuous operation, TO-252-2L",
          "symbol": "PD Ref",
          "kind": "thermal",
          "unit": "W",
          "min": null,
          "typ": 1.25,
          "max": null,
          "conditions": "TO-252-2L; TA = 25°C; soldered on PCB in still air",
          "source_page": 9,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
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  "discovery_triggers": [
    "cj7812b-tfn-arg"
  ],
  "discovery_pitch": "CJ7812B-TFN-ARG (Changjing) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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