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Ray Set visibility: public b5957db 17d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "cm1821b33",
  "title": "CM1821B33",
  "brief": "iCM(创芯微) Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-3. 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)",
    "cm1821b33",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "CM1821B33",
    "manufacturer": "iCM(创芯微)",
    "package": "SOT-23-3",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603386746394587136",
    "parts": {
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      "footprint": "cm1821b33.kicad_mod",
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      "lbr": "cm1821b33.lbr"
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    "distributor_links": {
      "lcsc": "C22446623"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T16:43:04Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
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      "mouser": {
        "pn": null,
        "status": "quota"
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    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated output (3.3 V for the CM1821B33, ±1% accuracy, up to 150 mA); absolute maximum -0.3 to 6 V to ground, with 1 to 10 µF output capacitor (10 µF typical)."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Supply input, rated up to 30 V (absolute maximum -0.3 to 30 V to ground), with 1 to 22 µF input capacitor (10 µF typical)."
      }
    ],
    "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: Package mapping is inferred. The selection table defines X=B as SOT23-3, so CM1821B33 is the SOT23-3; The VOUT-to-GND and VIN-to-GND limits are absolute maximum ratings that apply to the whole CM1821 fa"
        ],
        "pages_sent": 10,
        "cost_usd": 0.0283,
        "at": "2026-10-17T16:41:22"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603386746394587136",
        "pages": 10,
        "sha256": "f283c48fc62baff8",
        "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": [
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        "file": "cm1821b33.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.5,
          3,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "16964b14f93e6c778288a0c110b35f670fab733109c26f0da7dfc07cc3350040",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cm1821b33-etched.step",
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        "sha256": "2b302302662c0ddd8b63608a05f08f07fab3efb00ba03e47ea9dfd93b5c437d6",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "iCM(创芯微)",
      "Package": "SOT-23-3",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "f283c48fc62baff861992f9a7a45510ec778fe5991a968bbf354d5c235090995",
      "rows": [
        {
          "name": "VIN input voltage (to GND)",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 30,
          "conditions": "VIN 到地耐压",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VOUT to GND withstand voltage",
          "symbol": "VOUT",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "VOUT 到地耐压",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VOUT to VIN withstand voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -30,
          "typ": null,
          "max": 0.3,
          "conditions": "VOUT 到 VIN 耐压",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating ambient temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "工作环境温度",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "存储温度",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "工作结温",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance, SOT23-3",
          "symbol": "",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": null,
          "max": 380,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input capacitor Cin (typical application)",
          "symbol": "Cin",
          "kind": "recommended_operating",
          "unit": "µF",
          "min": 1,
          "typ": 10,
          "max": 22,
          "conditions": "典型应用电路 器件标识",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Output capacitor Cout (typical application)",
          "symbol": "Cout",
          "kind": "recommended_operating",
          "unit": "µF",
          "min": 1,
          "typ": 10,
          "max": 10,
          "conditions": "典型应用电路 器件标识",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Input voltage",
          "symbol": "VIN",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 30,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current",
          "symbol": "IGND",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 3,
          "max": 6,
          "conditions": "VIN=12V,空载",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output voltage accuracy",
          "symbol": "VOUT",
          "kind": "tolerance",
          "unit": "%",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "VIN=12V,IOUT=10mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output current",
          "symbol": "IOUT_MAX",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Dropout voltage",
          "symbol": "VDROP",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.12,
          "conditions": "IOUT=10mA,ΔVOUT=-VOUTNOM*2%",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Dropout voltage",
          "symbol": "VDROP",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.3,
          "conditions": "IOUT=50mA,ΔVOUT=-VOUTNOM*2%",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Dropout voltage",
          "symbol": "VDROP",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.6,
          "conditions": "IOUT=100mA,ΔVOUT=-VOUTNOM*2%",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Load regulation",
          "symbol": "ΔVOUT",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 30,
          "max": 60,
          "conditions": "1mA≤IOUT≤100mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Line regulation",
          "symbol": "ΔVOUT*100/ΔVIN*VOUT",
          "kind": "electrical",
          "unit": "%/V",
          "min": null,
          "typ": null,
          "max": 0.1,
          "conditions": "IOUT=1mA,VIN=(VOUTNOM+1V) to 30V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Power supply rejection ratio",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": 50,
          "typ": null,
          "max": null,
          "conditions": "IOUT=10mA,f=1KHz",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output voltage temperature coefficient",
          "symbol": "ΔVOUT/ΔTA*VOUT",
          "kind": "temperature_coefficient",
          "unit": "ppm/℃",
          "min": null,
          "typ": null,
          "max": 80,
          "conditions": "IOUT=1mA,-40℃< TA <85℃",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Short-circuit current",
          "symbol": "ISHORT",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 60,
          "conditions": "VIN=(VOUTNOM+1V) to 30V,RLOAD=VOUTNOM/1A",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Thermal shutdown temperature",
          "symbol": "TSHDN",
          "kind": "electrical",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_triggers": [
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  ],
  "discovery_pitch": "CM1821B33 (iCM(创芯微)) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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}