main
Ray Set visibility: public f5b3078 14d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "md78u50",
  "title": "MD78U50",
  "brief": "Shanghai Mingda Microelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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  "component": {
    "mpn": "MD78U50",
    "manufacturer": "Shanghai Mingda Microelectronics",
    "package": "SOT-89-3L",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590225438027898880",
    "parts": {
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      "lbr": "md78u50.lbr"
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    "distributor_links": {
      "lcsc": "C2978369"
    },
    "distributor_check": {
      "checked_at": "2026-10-20T20:49:27Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "OUT",
        "type": "power_out",
        "description": "Output terminal of the regulator; the datasheet warns that VOUT must not exceed VIN+0.3V, because reverse current through the parasitic diode can destroy the IC."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground terminal; the datasheet gives no further electrical limit for this pin."
      },
      {
        "number": "3",
        "name": "VDD",
        "type": "power_in",
        "description": "Power input terminal; the absolute maximum input voltage (VIN) is 30 V, and the output is held in regulation across the input range stated in the electrical characteristics."
      }
    ],
    "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 has no separate SOT-89-3L pin diagram in the extracted text. The pin table on page 1 i; Pin descriptions are brief in the source (输出端 / 接地端 / 电源输入端). Limits were added only where the datas; The datasheet labels the input pin VDD in the pinout but uses VIN in the ratings and electrical tabl"
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        "pages_sent": 10,
        "cost_usd": 0.0333,
        "at": "2026-10-20T20:47:28"
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        "pages": 10,
        "sha256": "ce26046787740645",
        "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
      }
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        "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": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  "metadata": {
    "specs": {
      "Manufacturer": "Shanghai Mingda Microelectronics",
      "Package": "SOT-89-3L",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "ce2604678774064542ce01a9d32397d0511c1af6c15dd04fc7065165472c6456",
      "rows": [
        {
          "name": "Output voltage",
          "symbol": "VOUT",
          "kind": "electrical",
          "unit": "V",
          "min": 4.85,
          "typ": 5,
          "max": 5.15,
          "conditions": "VIN= 7V,IOUT=10mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output current",
          "symbol": "IOUT",
          "kind": "electrical",
          "unit": "mA",
          "min": 120,
          "typ": 150,
          "max": null,
          "conditions": "VIN= 7V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input-output voltage difference",
          "symbol": "Vdrop",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 80,
          "conditions": "IOUT=10mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input-output voltage difference",
          "symbol": "Vdrop",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 8,
          "max": null,
          "conditions": "IOUT=1mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input stability",
          "symbol": "△VOUT/△VIN·VOUT",
          "kind": "electrical",
          "unit": "%/V",
          "min": null,
          "typ": 0.05,
          "max": 0.2,
          "conditions": "6V≤VIN≤30V, IOUT=1mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Load regulation",
          "symbol": "△VOUT2",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 60,
          "max": 100,
          "conditions": "VIN=7V, 1.0mA≤IOUT≤120mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output voltage temperature coefficient",
          "symbol": "△VOUT/△Ta·VOUT",
          "kind": "temperature_coefficient",
          "unit": "Ppm/℃",
          "min": -100,
          "typ": null,
          "max": 100,
          "conditions": "VIN=7V,IOUT=10mA, -40℃≤Ta≤85℃",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output voltage temperature coefficient (typical)",
          "symbol": "△VOUT/△Ta·VOUT",
          "kind": "temperature_coefficient",
          "unit": "Ppm/℃",
          "min": null,
          "typ": 50,
          "max": null,
          "conditions": "VIN=7V,IOUT=10mA, -40℃≤Ta≤85℃",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current",
          "symbol": "ISS",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": 30,
          "max": 40,
          "conditions": "VIN=30V 无负载",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input voltage (Vmax)",
          "symbol": "Vmax",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 30,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output short-circuit current",
          "symbol": "Ishort",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 100,
          "max": null,
          "conditions": "Vout=0V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input voltage (absolute maximum)",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 30,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Power dissipation, SOT_89",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "SOT_89 package, Ta=25℃",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating ambient temperature range",
          "symbol": "Topr",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage ambient temperature range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Input capacitor",
          "symbol": "CIN",
          "kind": "recommended_operating",
          "unit": "µF",
          "min": 1,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output capacitor (tantalum)",
          "symbol": "CL",
          "kind": "recommended_operating",
          "unit": "µF",
          "min": 2.2,
          "typ": null,
          "max": null,
          "conditions": "钽电容器",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output capacitor (aluminum electrolytic)",
          "symbol": "CL",
          "kind": "recommended_operating",
          "unit": "µF",
          "min": 10,
          "typ": null,
          "max": null,
          "conditions": "铝电解电容器",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output capacitor ESR (appropriate range)",
          "symbol": "ESR",
          "kind": "recommended_operating",
          "unit": "Ω",
          "min": 0.5,
          "typ": null,
          "max": 5,
          "conditions": "approximate appropriate range, 左右 as printed",
          "source_page": 5,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_triggers": [
    "md78u50"
  ],
  "discovery_pitch": "MD78U50 (Shanghai Mingda Microelectronics) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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}