CJ78D05

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  "type": "component",
  "slug": "cj78d05",
  "title": "CJ78D05",
  "brief": "Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2L. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.1",
  "license": "CC-BY-SA-4.0",
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  "component": {
    "mpn": "CJ78D05",
    "manufacturer": "Changjing",
    "package": "TO-252-2L",
    "pin_count": 3,
    "category": "PMIC",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/23da8fc68a6045389a510509ed89dfc6.pdf",
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    "pins": [
      {
        "number": "1",
        "name": "IN",
        "type": "power_in",
        "description": "Unregulated positive input voltage. Operating range 7.5 V to 25 V (absolute max 35 V). Bypass to GND with a 0.33 uF ceramic capacitor located close to the pin."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for both the input and output. Also electrically connected to the exposed tab of the TO-252 package (thermal pad)."
      },
      {
        "number": "3",
        "name": "OUT",
        "type": "power_out",
        "description": "Regulated +5 V output (4.8-5.2 V at 25 C, 5 mA to 1 A). Requires a 0.1 uF output capacitor to GND for stability. Continuous output current up to 1 A subject to thermal derating (PD = 1.25 W, RthetaJA = 80 C/W)."
      }
    ],
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        "pages": 4,
        "sha256": "736850389e63ebba",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
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        "refuses_to_fabricate": true
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    "pin1": {
      "pad": "1",
      "at": [
        -5.04,
        -2.28
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "TO-252-2@sha256:18c28e5e147d5e9b",
      "mark": "drawn"
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3eb4c99603a4fe837c2fe9308bc174769ded87a785a0df48d2dc441432ee8b4c",
        "checked": "2026-10-07",
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        "sha256": "b09ddb24c8065e0731bca467a40d091e61674136593c1499a865f6466054889b",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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    ]
  },
  "metadata": {
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "rows": [
        {
          "name": "Input voltage",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 35,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
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      ]
    }
  },
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  "discovery_pitch": "CJ78D05 (Changjing) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
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  "visibility": "public",
  "updated_at": "2026-09-24T19:10:09.734Z",
  "description": "Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2L. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "org": "adom"
}