main
Ray Set visibility: public c29d90f 21d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "l-cj78m05",
  "title": "L-CJ78M05",
  "brief": "Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
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    "extractor-text"
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  "component": {
    "mpn": "L-CJ78M05",
    "manufacturer": "Changjing",
    "package": "TO-252-2",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589834551121391616",
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      "lbr": "l-cj78m05.lbr"
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    "distributor_links": {
      "lcsc": "C2961223"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T22:24:13Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "IN",
        "type": "power_in",
        "description": "Input terminal; the absolute maximum input voltage Vi is 35 V, and regulation is specified for 7 V ≤ Vi ≤ 20 V (up to 25 V in the line-regulation test), with a 0.33 μF input bypass capacitor recommended."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground terminal of the regulator, printed as pin 2 in the TO-252-2L pinout; the datasheet gives no separate electrical limit for this pin."
      },
      {
        "number": "3",
        "name": "OUT",
        "type": "power_out",
        "description": "Regulated 5 V output (4.75 V to 5.25 V over 7 V ≤ Vi ≤ 20 V and 5 mA to 350 mA), with a maximum output current IOM of 0.5 A and a 0.1 μF output capacitor recommended."
      }
    ],
    "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 MPN given is L-CJ78M05, but the datasheet covers only CJ78M05. The 'L-' prefix is not defined in; The requested package is TO-252-2, but the datasheet only describes TO-252-2L. The pinout is taken f"
        ],
        "pages_sent": 5,
        "cost_usd": 0.0204,
        "at": "2026-10-18T22:23:59"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589834551121391616",
        "pages": 5,
        "sha256": "bf26fbc3285af88c",
        "source_tier": "lcsc"
      },
      "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"
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        "file": "l-cj78m05.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          6.5,
          2.32
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3eb4c99603a4fe837c2fe9308bc174769ded87a785a0df48d2dc441432ee8b4c",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
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        "sha256": "4d5b4d21621e9998b08ca58def31e4d619d3085ff7f411d24d04e7400a798708",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Changjing",
      "Package": "TO-252-2",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "bf26fbc3285af88ce7d93cb2cc2bdded0288d4740d558c74c4ad566cb0fc638e",
      "rows": [
        {
          "name": "Output Voltage",
          "symbol": "Vo",
          "kind": "electrical",
          "unit": "V",
          "min": 4.85,
          "typ": 5,
          "max": 5.15,
          "conditions": "Vi=10V, Io=350mA, Ci=0.33μF, Co=0.1μF, unless otherwise specified (table header)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage",
          "symbol": "Vo",
          "kind": "electrical",
          "unit": "V",
          "min": 4.75,
          "typ": 5,
          "max": 5.25,
          "conditions": "7V≤Vi≤20V, Io=5mA-350mA",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "ΔVo",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 15,
          "max": 100,
          "conditions": "Io=5mA-0.5A, TJ=25℃",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "ΔVo",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 5,
          "max": 50,
          "conditions": "Io=5mA-200mA, TJ=25℃",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "ΔVo",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 3,
          "max": 100,
          "conditions": "7V≤Vi≤25V, Io=200mA, TJ=25℃",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "ΔVo",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 1,
          "max": 50,
          "conditions": "8V≤Vi≤25V, Io=200mA, TJ=25℃",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current",
          "symbol": "Iq",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 4.2,
          "max": 6,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current Change",
          "symbol": "ΔIq",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "8V≤Vi≤25V, Io=200mA",
          "source_page": 1,
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        },
        {
          "name": "Quiescent Current Change",
          "symbol": "ΔIq",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "5mA≤IO≤350mA",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Output Noise Voltage",
          "symbol": "VN",
          "kind": "electrical",
          "unit": "μV",
          "min": null,
          "typ": 40,
          "max": 200,
          "conditions": "10Hz≤f≤100KHz, TJ=25℃",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Ripple Rejection",
          "symbol": "RR",
          "kind": "electrical",
          "unit": "dB",
          "min": 62,
          "typ": 80,
          "max": null,
          "conditions": "8V≤Vi≤18V, f=120Hz, Io=300mA",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage",
          "symbol": "Vd",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 2,
          "max": 2.5,
          "conditions": "Io=350mA, TJ=25℃",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Short Circuit Current",
          "symbol": "Isc",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 300,
          "max": null,
          "conditions": "Vi=10V, TJ=25℃",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Peak Current",
          "symbol": "Ipk",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 0.5,
          "max": null,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage",
          "symbol": "Vi",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 35,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Continuous Total Dissipation",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 1.25,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction Temperature Range",
          "symbol": "TOPR",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance from Junction to Ambient",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": 80,
          "max": null,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_triggers": [
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  ],
  "discovery_pitch": "L-CJ78M05 (Changjing) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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}