main
Ray Set visibility: public dba9bc7 3h ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "cm1842b33",
  "title": "CM1842B33",
  "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)",
    "cm1842b33",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "CM1842B33",
    "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/8603386758210211840",
    "parts": {
      "symbol": "cm1842b33.kicad_sym",
      "footprint": "cm1842b33.kicad_mod",
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      "model_3d_plain": "cm1842b33-etched.glb",
      "model_3d_step": "cm1842b33-etched.step",
      "model_3d_step_plain": "cm1842b33.step",
      "lbr": "cm1842b33.lbr"
    },
    "distributor_links": {
      "lcsc": "C22446634"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T16:02:57Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin (地); it is pin 1 on the SOT23-3 variant."
      },
      {
        "number": "2",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated 3.3 V output; absolute maximum VOUT-to-GND is -0.3 V to 7 V, and output current is rated up to 300 mA (350 mA typical max limit per the table)."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply; the input voltage range is 3 V to 45 V, with absolute maximum VIN-to-GND of -0.3 V to 50 V."
      }
    ],
    "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 gives two 3-pin tables on page 3 (GND/VIN/VOUT and GND/VOUT/VIN) and the text layout d; The pin description for VOUT uses the 300 mA rated output from the features and the 350 mA IOUT_MAX "
        ],
        "pages_sent": 14,
        "cost_usd": 0.0332,
        "at": "2026-10-17T16:01:18"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603386758210211840",
        "pages": 14,
        "sha256": "528af0d27dbbd15b",
        "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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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          3,
          1.2
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        "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": "cm1842b33-etched.step",
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        "sha256": "8016a2b30ac95cc2eb71bfe741d6f4823d7f97427e9d231ba861dba38aa530ed",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "iCM(创芯微)",
      "Package": "SOT-23-3",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "528af0d27dbbd15bcae71bf27046c0c7376ce5af34b413b01e19583b3b80ba84",
      "rows": [
        {
          "name": "输入电压",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 3,
          "typ": null,
          "max": 45,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "输出电压",
          "symbol": "VOUT",
          "kind": "tolerance",
          "unit": "%",
          "min": -2,
          "typ": null,
          "max": 2,
          "conditions": "VIN=12V, IOUT=10mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "输出电流",
          "symbol": "IOUT_MAX",
          "kind": "electrical",
          "unit": "mA",
          "min": 300,
          "typ": null,
          "max": 350,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "输入输出压差",
          "symbol": "VDROP",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 35,
          "conditions": "IOUT=10mA, ΔVOUT=-0.1V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "输入输出压差",
          "symbol": "VDROP",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 350,
          "conditions": "IOUT=100mA, ΔVOUT=-0.1",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "负载调整率",
          "symbol": "ΔVOUT",
          "kind": "electrical",
          "unit": "mV/mA",
          "min": null,
          "typ": null,
          "max": 0.1,
          "conditions": "1mA≤IOUT≤100mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "线性调整率",
          "symbol": "ΔVOUT*100/ΔVIN*VOUT",
          "kind": "electrical",
          "unit": "mV/V",
          "min": null,
          "typ": null,
          "max": 0.1,
          "conditions": "IOUT=1mA, VIN=(VOUTNOM+0.5V) to 42V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "电源抑制比",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": null,
          "max": 70,
          "conditions": "IOUT=10mA, f=1KHz",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "限流保护",
          "symbol": "ILIMIT",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "过温保护",
          "symbol": "TSHDN",
          "kind": "thermal",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 145,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "过温恢复",
          "symbol": "TSHDNR",
          "kind": "thermal",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "VIN到地耐压",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 50,
          "conditions": "",
          "source_page": 4,
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        },
        {
          "name": "VOUT到地耐压",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 7,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "VOUT到VIN耐压",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -50,
          "typ": null,
          "max": 0.3,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "工作环境温度",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "存储温度",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "工作结温",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "热阻 SOT23-3",
          "symbol": "",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": null,
          "max": 250,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
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  "discovery_triggers": [
    "cm1842b33"
  ],
  "discovery_pitch": "CM1842B33 (iCM(创芯微)) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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  "visibility": {
    "public": true
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}