main
Ray Set visibility: public deacb25 14d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "cjt1117b-2-5",
  "title": "CJT1117B-2.5",
  "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": [
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    "power management (pmic)",
    "cjt1117b-2.5",
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    "extractor-text"
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  "component": {
    "mpn": "CJT1117B-2.5",
    "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/8602895586836566016",
    "parts": {
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      "lbr": "cjt1117b-2-5.lbr"
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    "distributor_links": {
      "lcsc": "C17703059"
    },
    "distributor_check": {
      "checked_at": "2026-10-20T17:58:30Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
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        "name": "ADJ / GND",
        "type": "power_in",
        "description": "Ground reference for the fixed-voltage CJT1117B-2.5; on the adjustable version this pin is the ADJ pin, with adjust pin current listed as 60 to 120 µA."
      },
      {
        "number": "2",
        "name": "OUTPUT",
        "type": "power_out",
        "description": "Regulated output, 2.5 V nominal, specified as 2.450 V to 2.550 V at 10 mA to 1 A output current and 4 V ≤ VIN ≤ 12 V."
      },
      {
        "number": "3",
        "name": "IN",
        "type": "power_in",
        "description": "Input supply to the regulator, with the datasheet giving an absolute maximum VIN of 20 V in one table and 15 V in another."
      }
    ],
    "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 datasheet's pin list gives only three terminals (1 ADJ/GND, 2 OUTPUT, 3 IN). The SOT-223 package; Pin 1 is a dual-function pin: it is GND on the fixed-output parts (including the CJT1117B-2.5 this M; The absolute maximum input voltage is stated as 20 V in one table and 15 V in another on page 2. The"
        ],
        "pages_sent": 9,
        "cost_usd": 0.0302,
        "at": "2026-10-20T17:56:41"
      },
      "datasheet": {
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        "pages": 9,
        "sha256": "25a9c971517f0761",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          6.5,
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "77ad6dbacc493cb619c728f26d2ddcf461eb0feb6b977b47d01d51e67016f654",
        "checked": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cjt1117b-2-5-etched.step",
        "role": "eda",
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        "sha256": "7d9d279d582deb9cb87e039aff961aa1aa94f7ce649f24e2f2b561aa916618b0",
        "checked": "2026-10-20",
        "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": "25a9c971517f0761ca404cd64ef3cb77ab515818d553f44969960556eeb60e9d",
      "rows": [
        {
          "name": "Output Voltage",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": 2.463,
          "typ": 2.5,
          "max": 2.538,
          "conditions": "IOUT=10mA, VIN=4.5V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": 2.45,
          "typ": 2.5,
          "max": 2.55,
          "conditions": "10mA≤IOUT≤1A, 4V≤VIN≤12V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "LNR",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 7,
          "conditions": "IOUT=10mA, 1.5V≤VIN-VOUT≤9.5V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "LDR",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "VIN-VOUT=1.5V, 10mA≤IOUT≤1A",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage",
          "symbol": "VD",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.15,
          "max": 1.3,
          "conditions": "ΔVREF=1%, IOUT=1000mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Adjust Pin Current",
          "symbol": "IADJ",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 60,
          "max": 120,
          "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",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Ripple Rejection",
          "symbol": "RR",
          "kind": "electrical",
          "unit": "dB",
          "min": 60,
          "typ": 75,
          "max": null,
          "conditions": "f=120Hz, COUT=22μF Tantalum, VIN-VOUT=3V, IOUT=1A",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Temperature Stability",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Long-Term Stability",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": null,
          "max": 0.3,
          "conditions": "TA=125℃, 1000h",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "RMS Output Noise (% of VOUT)",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": null,
          "max": 0.003,
          "conditions": "TA=25℃, 10Hz≤f≤10kHz",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Current Limit",
          "symbol": "ILimit",
          "kind": "electrical",
          "unit": "A",
          "min": 1.2,
          "typ": 1.5,
          "max": null,
          "conditions": "VIN-VOUT=1.5V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Thermal Shutdown Temperature",
          "symbol": "TSD",
          "kind": "electrical",
          "unit": "°C",
          "min": null,
          "typ": 160,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Thermal Shutdown Hysteresis",
          "symbol": "ΔTSD",
          "kind": "electrical",
          "unit": "°C",
          "min": null,
          "typ": 25,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "Input Voltage",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum Junction Temperature",
          "symbol": "TJ MAX",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
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        },
        {
          "name": "Soldering Temperature & Time",
          "symbol": "Tsolder",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "10s",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 15,
          "conditions": "",
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        },
        {
          "name": "Operating Junction Temperature",
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          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 2,
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        {
          "name": "Operating Ambient Temperature",
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          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-ambient thermal resistance",
          "symbol": "RΘJA",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": 100,
          "max": null,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-case thermal resistance",
          "symbol": "RΘJC",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": 35,
          "max": null,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_pitch": "CJT1117B-2.5 (Changjing) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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