main
Ray Set visibility: public 5b0a746 11h ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "scjt1117b-1-8",
  "title": "SCJT1117B-1.8",
  "brief": "Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management (pmic)",
    "scjt1117b-1.8",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "SCJT1117B-1.8",
    "manufacturer": "Changjing",
    "package": "SOT-223",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588941866050473984",
    "parts": {
      "symbol": "scjt1117b-1-8.kicad_sym",
      "footprint": "scjt1117b-1-8.kicad_mod",
      "model_3d": "scjt1117b-1-8-hero.glb",
      "model_3d_plain": "scjt1117b-1-8-etched.glb",
      "model_3d_step": "scjt1117b-1-8-etched.step",
      "model_3d_step_plain": "scjt1117b-1-8.step",
      "lbr": "scjt1117b-1-8.lbr"
    },
    "distributor_links": {
      "lcsc": "C1884531"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T14:07:00Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "ADJ/GND",
        "type": "power_in",
        "description": "Ground reference for the fixed-voltage versions (including SCJT1117B-1.8) and the adjust terminal for the ADJ version, with adjust pin current specified at 55 to 120 µA in the electrical characteristics table."
      },
      {
        "number": "2",
        "name": "OUTPUT",
        "type": "power_out",
        "description": "Regulated output; for the 1.8 V version the output is specified at 1.755 V to 1.845 V at 10 mA load, and 22 µF tantalum is recommended as the output capacitor in the application circuit."
      },
      {
        "number": "3",
        "name": "IN",
        "type": "power_in",
        "description": "Unregulated input supply; the datasheet lists an input voltage limit of 20 V in its rating table and requires VIN to exceed VOUT by the dropout voltage (1.3 V typical at 1 A)."
      }
    ],
    "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: Pin 1 is printed as 'ADJ/GND' and the datasheet does not state separately whether it is GND or ADJ f; The rating tables show input voltage as 20 V and 15 V under unclear headings (absolute maximum vs. r; The 1.8 V output accuracy range comes from the electrical table at 10 mA load, which is partly garbl"
        ],
        "pages_sent": 7,
        "cost_usd": 0.0363,
        "at": "2026-10-18T14:03:32"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588941866050473984",
        "pages": 7,
        "sha256": "fd37c845798118f3",
        "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"
    },
    "models_3d": [
      {
        "file": "scjt1117b-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": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "scjt1117b-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": "354b375a302444c19d705db1c2cf3b0e3aca9b9e8ee2f72fdec6657a5f7ecc8f",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Changjing",
      "Package": "SOT-223",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "fd37c845798118f38bacbbfc2d2f50186f1269f2e01b3fb9ea029e35153deca0",
      "rows": [
        {
          "name": "Output Voltage (SCJT1117B-1.8)",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": 1.764,
          "typ": 1.8,
          "max": 1.836,
          "conditions": "IOUT=10mA, VIN=3.8V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage (SCJT1117B-1.8)",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": 1.755,
          "typ": 1.8,
          "max": 1.845,
          "conditions": "10mA≤IOUT≤1A, 3.3V≤VIN≤12V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation (SCJT1117B-1.8)",
          "symbol": "LNR",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.03,
          "max": 0.2,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation (SCJT1117B-1.8)",
          "symbol": "LDR",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 9,
          "max": 36,
          "conditions": "VIN-VOUT=1.5V, 10mA≤IOUT≤1A",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Minimum Load Current",
          "symbol": "IL",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 2,
          "max": 10,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current",
          "symbol": "Iq",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "VIN= VOUT+1.25V (ADJ except)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage",
          "symbol": "VD",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.3,
          "max": null,
          "conditions": "ΔVREF=1%, IOUT=1.0A",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Ripple Rejection",
          "symbol": "RR",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": 60,
          "max": null,
          "conditions": "f=120Hz, COUT=22μF Tantalum, VIN-VOUT=3V, IOUT=1A",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage",
          "symbol": "Vi",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature",
          "symbol": "Tj",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -25,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Lead Temperature",
          "symbol": "TL",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Soldering, 10s",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "ESD Voltage",
          "symbol": "VESD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 400,
          "conditions": "Machine Model",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance from Junction to Ambient",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": 10,
          "max": null,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage",
          "symbol": "Vi",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 15,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction Temperature",
          "symbol": "Tj",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": -25,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "scjt1117b-1.8"
  ],
  "discovery_pitch": "SCJT1117B-1.8 (Changjing) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "scjt1117b-1-8.kicad_sym",
    "scjt1117b-1-8.kicad_mod",
    "scjt1117b-1-8.glb",
    "scjt1117b-1-8.step",
    "scjt1117b-1-8.lbr",
    "docs/hero.png",
    "docs/scjt1117b-1-8-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "scjt1117b-1-8-hero.glb",
    "scjt1117b-1-8-hero.overlay.json",
    "scjt1117b-1-8-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}