cjt1117b-1-8

{
  "slug": "cjt1117b-1-8",
  "version": "0.1.0",
  "type": "component",
  "description": "Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "pmic",
    "cjt1117b-1.8"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cjt1117b-1-8.kicad_sym",
    "cjt1117b-1-8.kicad_mod",
    "cjt1117b-1-8.glb",
    "cjt1117b-1-8.step",
    "cjt1117b-1-8.lbr",
    "docs/hero.png",
    "docs/cjt1117b-1-8-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "cjt1117b-1-8-etched.step"
  ],
  "visibility": {
    "public": true
  },
  "author": {
    "name": "Ray"
  },
  "component": {
    "mpn": "CJT1117B-1.8",
    "manufacturer": "Changjing",
    "package": "SOT-223",
    "pin_count": 4,
    "category": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "parts": {
      "symbol": "cjt1117b-1-8.kicad_sym",
      "footprint": "cjt1117b-1-8.kicad_mod",
      "model_3d": "cjt1117b-1-8-etched.glb",
      "model_3d_plain": "cjt1117b-1-8.glb",
      "model_3d_step": "cjt1117b-1-8-etched.step",
      "model_3d_step_plain": "cjt1117b-1-8.step",
      "lbr": "cjt1117b-1-8.lbr"
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground return for the regulator. On the fixed-voltage CJT1117B-1.8 variant this pin is the device ground reference (labeled ADJ/GND on the package; the ADJ function is used only on the -ADJ variant). Tie directly to system ground."
      },
      {
        "number": "2",
        "name": "OUTPUT",
        "type": "power_out",
        "description": "Regulated 1.8V output (1.764V-1.836V over line/load, 10mA-1A). Requires a >=22uF tantalum output capacitor to ground for stability. The SOT-223 tab (pin 4) is internally connected to this OUTPUT pin."
      },
      {
        "number": "3",
        "name": "IN",
        "type": "power_in",
        "description": "Unregulated input supply, 3.3V to 12V for the -1.8 variant (absolute max 20V). Bypass with a 10uF tantalum capacitor to ground close to the pin."
      },
      {
        "number": "4",
        "name": "OUTPUT",
        "type": "power_out",
        "description": "SOT-223 thermal tab, internally connected to the OUTPUT pin (pin 2). Should be soldered to a copper pour tied to VOUT for heatsinking (RθJA = 100 °C/W)."
      }
    ],
    "provenance": {
      "rebuilt": "component block rebuilt 2026-10-05 from this page's own README pinout table and .kicad_sym (pins cross-checked), no re-extraction"
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "distributor_links": {
      "lcsc": "C2961228",
      "digikey": false,
      "mouser": false
    },
    "distributor_check": {
      "checked_at": "2026-10-05T18:55:56Z",
      "source": "Component Ocean /api/assign-pns + lcsc_map",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "models_3d": [
      {
        "file": "cjt1117b-1-8.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7,
          6.5,
          1.7
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "77ad6dbacc493cb619c728f26d2ddcf461eb0feb6b977b47d01d51e67016f654",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cjt1117b-1-8-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7,
          6.5,
          1.7
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "c0abd90d44c41eb00ea009dcee56784adbbacca4af996c2594e8b5130421ea1c",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}