78L05U

{
  "schema_version": 1,
  "type": "component",
  "slug": "78l05u",
  "title": "78L05U",
  "brief": "CBI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "78l05u"
  ],
  "component": {
    "mpn": "78L05U",
    "manufacturer": "CBI",
    "package": "SOT-89-3",
    "pin_count": 3,
    "category": "PMIC",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2202131900_CBI-78L05U_C2828474.pdf",
    "parts": {
      "symbol": "78l05u.kicad_sym",
      "footprint": "78l05u.kicad_mod",
      "model_3d": "78l05u-etched.glb",
      "model_3d_plain": "78l05u.glb",
      "model_3d_step": "78l05u-etched.step",
      "model_3d_step_plain": "78l05u.step",
      "lbr": "78l05u.lbr"
    },
    "distributor_links": {
      "lcsc": "C2828474"
    },
    "pins": [
      {
        "number": "1",
        "name": "VO",
        "type": "power_out",
        "description": "Regulated +5 V output. Typical 5.0 V (4.75 V to 5.25 V) over 7 V ≤ VI ≤ 20 V and 1 mA ≤ IO ≤ 40 mA. Bypass with a 0.1 µF ceramic capacitor to GND close to the pin for stability."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Common ground reference for both input and output. In the SOT-89 package this pin is also the thermal tab, so its PCB copper acts as the primary heatsink for Ptot up to 800 mW."
      },
      {
        "number": "3",
        "name": "VI",
        "type": "power_in",
        "description": "Unregulated positive input supply, 7 V to 20 V for spec compliance (30 V absolute max). Bypass with a 0.33 µF capacitor to GND close to the pin to ensure loop stability and reject line transients."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
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        "pages": 2,
        "sha256": "051ac44ab6bfa721",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -1.95,
        -1.5
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOT-89-3@sha256:0b8db9f4a8f2547a",
      "mark": "drawn"
    },
    "models_3d": [
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        "file": "78l05u.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.5,
          1.52
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.05,
        "footprint_binding": "identity",
        "sha256": "844c0bb504d0c383535d9845c6376fe7a4053241a2ede8d8ef694df3fcfc37c8",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "78l05u-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          4.5,
          1.52
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.05,
        "footprint_binding": "identity",
        "sha256": "b77ae6b8bfd8c258fb71ffb8ce816a0d127e3f30882b2b2aa7215d505719d4b8",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "CBI",
      "Package": "SOT-89-3",
      "Category": "PMIC",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "051ac44ab6bfa721",
      "rows": [
        {
          "name": "Output Voltage",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": 4.8,
          "typ": 5,
          "max": 5.2,
          "conditions": "Tj = 25 °C",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage",
          "symbol": "VO",
          "kind": "electrical",
          "unit": "V",
          "min": 4.75,
          "typ": null,
          "max": 5.25,
          "conditions": "7 V ≤ VI ≤ 20 V, 1 mA ≤ IO ≤ 40 mA",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "Regline",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "7 V ≤ VI ≤ 20 V, Tj = 25 °C",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "Regline",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "8 V ≤ VI ≤ 20 V, Tj = 25 °C",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "Regload",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 60,
          "conditions": "1 mA ≤ IO ≤ 100 mA, Tj = 25 °C",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "Regload",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 30,
          "conditions": "1 mA ≤ IO ≤ 40 mA, Tj = 25 °C",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 5.5,
          "conditions": "Tj = 25 °C",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current Change",
          "symbol": "ΔIQ",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 1.5,
          "conditions": "8 V ≤ VI ≤ 20 V",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current Change",
          "symbol": "ΔIQ",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 0.1,
          "conditions": "1 mA ≤ IO ≤ 40 mA",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Ripple Rejection",
          "symbol": "RR",
          "kind": "electrical",
          "unit": "dB",
          "min": 41,
          "typ": null,
          "max": null,
          "conditions": "f = 120 Hz, 8 V ≤ VI ≤ 18 V, Tj = 25 °C",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage",
          "symbol": "VI",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 30,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Power Dissipation",
          "symbol": "Ptot",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 800,
          "conditions": "15 mm X 25 mm X 0.7 mm alumina ceramic board, Ta ≤ 25 °C (footnote 1)",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature",
          "symbol": "Topr",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -20,
          "typ": null,
          "max": 120,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        }
      ]
    }
  },
  "sections": [
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    "breadcrumbs",
    "info"
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  "discovery_triggers": [
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  ],
  "discovery_pitch": "78L05U (CBI) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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    "78l05u-etched.step",
    "78l05u.lbr",
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  "visibility": {
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  },
  "updated_at": "2026-09-24T15:21:03.597Z"
}