L78M09CDT-TR

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  "title": "L78M09CDT-TR",
  "brief": "STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2(DPAK). Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
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    "manufacturer": "STMicroelectronics",
    "package": "TO-252-2(DPAK)",
    "pin_count": 3,
    "category": "PMIC",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
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      "digikey": "497-1208-2-ND",
      "mouser": "511-L78M09CDT-TR",
      "lcsc": "C123981"
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    "pins": [
      {
        "number": "1",
        "name": "INPUT",
        "type": "power_in",
        "description": "Unregulated positive DC input. For a 9 V output, V_I must be at least a few volts above V_O; absolute maximum V_I = 35 V (for V_O = 5-18 V). A 0.33 uF ceramic capacitor to GND is recommended close to the pin."
      },
      {
        "number": "2",
        "name": "GROUND",
        "type": "power_in",
        "description": "Common ground reference. On DPAK, pin 2 is electrically tied to the exposed heat-sink tab, which is the primary thermal path (R_thJC = 8 C/W, R_thJA = 100 C/W). Solder the tab to a copper pour for heat dissipation."
      },
      {
        "number": "3",
        "name": "OUTPUT",
        "type": "power_out",
        "description": "Regulated +9 V DC output, up to 0.5 A (peak >0.5 A with adequate heatsinking). Internally current-limited and SOA-protected. A 0.1 uF ceramic capacitor to GND is recommended to improve transient response and stability."
      }
    ],
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        "source_tier": "mfr"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
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        "refuses_to_fabricate": true
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    "pin1": {
      "pad": "1",
      "at": [
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        -2.28
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      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "TO-252-2@sha256:18c28e5e147d5e9b",
      "mark": "drawn"
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3eb4c99603a4fe837c2fe9308bc174769ded87a785a0df48d2dc441432ee8b4c",
        "checked": "2026-10-07",
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  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "TO-252-2(DPAK)",
      "Category": "PMIC",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
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      "rows": [
        {
          "name": "Output voltage",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": 8.65,
          "typ": 9,
          "max": 9.35,
          "conditions": "",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Output voltage",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": 8.55,
          "typ": 9,
          "max": 9.45,
          "conditions": "IO = 5 to 350 mA, VI = 11.5 to 24 V",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Line regulation",
          "symbol": "∆VO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "VI = 11.5 to 25 V, IO = 200 mA",
          "source_page": 13,
          "source": "datasheet"
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        {
          "name": "Line regulation",
          "symbol": "∆VO",
          "kind": "electrical",
          "unit": "mV",
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          "typ": null,
          "max": 50,
          "conditions": "VI = 12 to 25 V, IO = 200 mA",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Load regulation",
          "symbol": "∆VO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 180,
          "conditions": "IO = 5 to 500 mA, TJ = 25 °C",
          "source_page": 13,
          "source": "datasheet"
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        {
          "name": "Load regulation",
          "symbol": "∆VO",
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          "max": 90,
          "conditions": "IO = 5 to 200 mA, TJ = 25 °C",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current",
          "symbol": "Id",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current change",
          "symbol": "∆Id",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "IO = 5 to 350 mA",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current change",
          "symbol": "∆Id",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "IO = 200 mA, VI = 11.5 to 25 V",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Output voltage drift",
          "symbol": "∆VO/∆T",
          "kind": "temperature_coefficient",
          "unit": "mV/°C",
          "min": null,
          "typ": null,
          "max": -0.5,
          "conditions": "IO = 5 mA, TJ = 0 to 125 °C",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage rejection",
          "symbol": "SVR",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": null,
          "max": 56,
          "conditions": "VI = 12.5 to 23 V, f = 120 Hz, IO = 300 mA",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Output noise voltage",
          "symbol": "eN",
          "kind": "electrical",
          "unit": "µV",
          "min": null,
          "typ": null,
          "max": 58,
          "conditions": "B = 10 Hz to 100 kHz",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Dropout voltage",
          "symbol": "Vd",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 2,
          "conditions": "",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Short circuit current",
          "symbol": "Isc",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 250,
          "conditions": "VI = 35 V",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "DC input voltage (for VO = 5 to 18 V)",
          "symbol": "VI",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 35,
          "conditions": "for VO = 5 to 18 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature range",
          "symbol": "TOP",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": 0,
          "typ": null,
          "max": 150,
          "conditions": "for L78MxxC",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction-case (DPAK)",
          "symbol": "RthJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": null,
          "max": 8,
          "conditions": "DPAK",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction-ambient (DPAK)",
          "symbol": "RthJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "DPAK",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input voltage",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 35,
          "conditions": "for VO = 5 to 18 V",
          "source_page": 5,
          "source": "datasheet"
        }
      ]
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  "author": {
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  "updated_at": "2026-09-24T23:38:32.334Z",
  "description": "STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2(DPAK). Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "org": "adom"
}