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Ray Set visibility: public 4d11a6e 17d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "cm1843aa2",
  "title": "CM1843AA2",
  "brief": "iCM(创芯微) Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3. 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)",
    "cm1843aa2",
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  "component": {
    "mpn": "CM1843AA2",
    "manufacturer": "iCM(创芯微)",
    "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/8603372322905092096",
    "parts": {
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      "lbr": "cm1843aa2.lbr"
    },
    "distributor_links": {
      "lcsc": "C22446636"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T00:35:13Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
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        "status": "no match"
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      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin; the regulator's common return, and the datasheet limits VIN-to-GND to -0.3 V to 45 V and VOUT-to-GND to -0.3 V to Vin+7 V."
      },
      {
        "number": "2",
        "name": "VIN",
        "type": "power_in",
        "description": "Supply input, specified for 3 V to 40 V with an absolute maximum of -0.3 V to 45 V to GND, and the datasheet notes VOUT-to-VIN must stay within -50 V to 0.3 V."
      },
      {
        "number": "3",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulated fixed 12 V output, rated for up to 300 mA, with VOUT-to-GND limited to -0.3 V to Vin+7 V and VOUT-to-VIN limited to -50 V to 0.3 V."
      }
    ],
    "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: The MPN CM1843AA2 maps to the 'A' (SOT89-3) variant per the product selection table (CM1843XA2, X=A:; The output schema has no field for headline electrical specs, so the spec values (VIN 3–40 V, IGND 2; The datasheet's thermal resistance for SOT89-3 is 180 °C/W, which was not included in the pinout out"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0254,
        "at": "2026-10-18T00:33:06"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603372322905092096",
        "pages": 11,
        "sha256": "6c81b4864a8d9878",
        "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": "cm1843aa2.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4,
          4.5,
          1.52
        ],
        "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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        "sha256": "ce93da8d418a053b1c4b61e5056bd3bd94d2d23fb5cfef44c18d51d6cde56fe3",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "iCM(创芯微)",
      "Package": "SOT-89-3",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "6c81b4864a8d9878bce1723d7ac5ac7645b4cbf758c3dfb2e45de05bfd17d436",
      "rows": [
        {
          "name": "输入电压 Input voltage",
          "symbol": "VIN",
          "kind": "electrical",
          "unit": "V",
          "min": 3,
          "typ": null,
          "max": 40,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "静态电流 Quiescent current",
          "symbol": "IGND",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 2.8,
          "max": 6.5,
          "conditions": "VIN=12V, no load",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "输出电压精度 Output voltage accuracy",
          "symbol": "VOUT",
          "kind": "tolerance",
          "unit": "%",
          "min": -2,
          "typ": null,
          "max": 2,
          "conditions": "VIN=18V, IOUT=10mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "输出电流 Output current",
          "symbol": "IOUT_MAX",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 300,
          "max": 350,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "输入输出压差 Dropout voltage (VOUT=3.0~13V row, applies to 12V)",
          "symbol": "VDROP",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 1000,
          "max": 1500,
          "conditions": "VOUT=3.0~13V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "负载调整率 Load regulation",
          "symbol": "ΔVOUT",
          "kind": "electrical",
          "unit": "mV/mA",
          "min": null,
          "typ": 0.1,
          "max": null,
          "conditions": "1mA≤IOUT≤100mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "线性调整率 Line regulation",
          "symbol": "ΔVOUT*100/ΔVIN*VOUT",
          "kind": "electrical",
          "unit": "mV/V",
          "min": null,
          "typ": 0.3,
          "max": null,
          "conditions": "IOUT=1mA, VIN=(VOUTNOM+2V) to 40V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "电源抑制比 Power supply rejection ratio",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": 70,
          "max": null,
          "conditions": "IOUT=10mA, f=1KHz",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "限流保护 Current limit",
          "symbol": "ILIMIT",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 450,
          "max": 800,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "过温保护 Thermal shutdown",
          "symbol": "TSHDN",
          "kind": "electrical",
          "unit": "℃",
          "min": null,
          "typ": 155,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "过温恢复 Thermal shutdown recovery",
          "symbol": "TSHDNR",
          "kind": "electrical",
          "unit": "℃",
          "min": null,
          "typ": 125,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "使能高电平 EN high enabled threshold",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 1,
          "typ": null,
          "max": null,
          "conditions": "EN High Enabled",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "使能低电平关断 EN low shutdown threshold",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.4,
          "conditions": "EN Low Shutdown",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VIN到地耐压 VIN to GND voltage",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 45,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VOUT到地耐压 VOUT to GND voltage",
          "symbol": "VOUT",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "Printed max is Vin+7 V (not a fixed number)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VOUT到VIN耐压 VOUT to VIN voltage",
          "symbol": "VOUT-VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -50,
          "typ": null,
          "max": 0.3,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "工作环境温度 Operating ambient temperature",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "存储温度 Storage temperature",
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          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "工作结温 Operating junction temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "热阻 Thermal resistance SOT89-3",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": 180,
          "max": null,
          "conditions": "SOT89-3",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "HBM ESD",
          "symbol": "HBM",
          "kind": "absolute_maximum",
          "unit": "KV",
          "min": null,
          "typ": null,
          "max": 2,
          "conditions": "Printed as 2K V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "CDM ESD",
          "symbol": "CDM",
          "kind": "absolute_maximum",
          "unit": "KV",
          "min": null,
          "typ": null,
          "max": 1.5,
          "conditions": "Printed as 1.5K V",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_pitch": "CM1843AA2 (iCM(创芯微)) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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