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Ray Set visibility: public cf8cf5b 17d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "cja1117b-1-8",
  "title": "CJA1117B-1.8",
  "brief": "Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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  "license": "CC-BY-SA-4.0",
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  "component": {
    "mpn": "CJA1117B-1.8",
    "manufacturer": "Changjing",
    "package": "SOT-89-3",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586174729800077312",
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      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "ADJ/GND",
        "type": "power_in",
        "description": "Pin 1 is labelled ADJ/GND; on the fixed-output CJA1117B-1.8 it serves as the ground reference, while the adjust function applies only to the ADJ version, and the datasheet gives no separate electrical limit for this pin."
      },
      {
        "number": "2",
        "name": "OUTPUT",
        "type": "power_out",
        "description": "Regulated 1.8 V output, specified at 1.764 V to 1.836 V for 10 mA to 1 A load with 3.3 V to 12 V input, with a trimmed current limit of 1 A (typ) at VIN-VOUT = 2 V."
      },
      {
        "number": "3",
        "name": "IN",
        "type": "power_in",
        "description": "Unregulated input supply pin with an absolute maximum input voltage of 20 V and a recommended input voltage of 15 V, requiring about 1.3 V (typ) dropout at 1 A."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
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        "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: Pinout is taken from the SOT-89-3L pin list on page 1. The ordering table on page 2 lists CJA1117B-1; The datasheet labels pin 1 as ADJ/GND for the whole series and does not explicitly state that it is ; The datasheet does not state whether the SOT-89 tab is connected to any pin, so no tab or thermal pa"
        ],
        "pages_sent": 6,
        "cost_usd": 0.0224,
        "at": "2026-10-18T03:46:38"
      },
      "datasheet": {
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        "pages": 6,
        "sha256": "fc47d4c515190804",
        "source_tier": "lcsc"
      },
      "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"
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        "role": "plain",
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        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0.05,
        "footprint_binding": "identity",
        "sha256": "844c0bb504d0c383535d9845c6376fe7a4053241a2ede8d8ef694df3fcfc37c8",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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      {
        "file": "cja1117b-1-8-etched.step",
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        "sha256": "ca09a24f1e3fe52678c6af6f3fc67bd611e83cdd8abb45855e9c111f5c4ec508",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Changjing",
      "Package": "SOT-89-3",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
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    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "fc47d4c5151908044ef7f2cdea5934c5038ac24cd8dad8412e796fa424233ddc",
      "rows": [
        {
          "name": "Output Voltage (IOUT=10mA, VIN=3.8V)",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": 1.773,
          "typ": 1.8,
          "max": 1.827,
          "conditions": "IOUT=10mA, VIN=3.8V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage (10mA≤IOUT≤1A, 3.3V≤VIN≤12V)",
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          "unit": "V",
          "min": 1.764,
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          "conditions": "10mA≤IOUT≤1A, 3.3V≤VIN≤12V",
          "source_page": 3,
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        },
        {
          "name": "Line Regulation",
          "symbol": "LNR",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 1,
          "max": 7,
          "conditions": "IOUT=10mA, 1.5V≤VIN -VOUT≤10.2V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "LDR",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 7.2,
          "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": null,
          "max": 1.3,
          "conditions": "ΔVREF=1%, IOUT=1.0A",
          "source_page": 3,
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        },
        {
          "name": "Adjust Pin Current",
          "symbol": "",
          "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": 5,
          "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=22μFTantalum, VIN-VOUT=3V, IOUT=1A",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Current Limit",
          "symbol": "Ilimit",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 1,
          "max": null,
          "conditions": "VIN-VOUT=2V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Temperature Stability",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.5,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Long-Term Stability",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.3,
          "max": null,
          "conditions": "TA=125℃, 1000hrs",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "RMS Output Noise (% of VOUT)",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.003,
          "max": null,
          "conditions": "TA=25℃, 10Hz≤f≤10kHz",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Thermal Shutdown Hysteresis",
          "symbol": "",
          "kind": "electrical",
          "unit": "℃",
          "min": null,
          "typ": 25,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage (absolute maximum)",
          "symbol": "Vi",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum Junction Temperature",
          "symbol": "Tj",
          "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": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Lead Temperature (Soldering, 10sec.)",
          "symbol": "TL",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Soldering, 10sec.",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "ESD Voltage (Machine Model)",
          "symbol": "VESD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 400,
          "conditions": "Machine Model",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage (recommended)",
          "symbol": "Vi",
          "kind": "recommended_operating",
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          "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"
        },
        {
          "name": "Thermal Resistance from Junction to Ambient",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": 250,
          "max": null,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_pitch": "CJA1117B-1.8 (Changjing) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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