LM5019MRX

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm5019mrx",
  "title": "LM5019MRX",
  "brief": "Texas Instruments DC-DC Converters, SO-8-EP. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "lm5019mrx"
  ],
  "component": {
    "mpn": "LM5019MRX",
    "manufacturer": "Texas Instruments",
    "package": "SO-8-EP",
    "pin_count": 9,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/1912202024_Texas-Instruments-LM5019MRX-NOPB_C471034.pdf",
    "parts": {
      "symbol": "lm5019mrx.kicad_sym",
      "footprint": "lm5019mrx.kicad_mod",
      "model_3d": "lm5019mrx-etched.glb",
      "model_3d_plain": "lm5019mrx.glb",
      "model_3d_step": "lm5019mrx-etched.step",
      "model_3d_step_plain": "lm5019mrx.step",
      "lbr": "lm5019mrx.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "RTN",
        "type": "power_in",
        "description": "Ground return of the integrated circuit. Also the reference for all internal analog and power domains. The exposed pad must be tied to this pin."
      },
      {
        "number": "2",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply pin. Operating input voltage range is 7.5 V to 100 V. Feeds the internal high-voltage startup regulator and the high-side power MOSFET."
      },
      {
        "number": "3",
        "name": "UVLO",
        "type": "input",
        "description": "Input to the undervoltage lockout comparator. A resistor divider from VIN sets the UVLO threshold; an internal current source provides programmable hysteresis when UVLO > 1.225 V. Pulling UVLO below 0.66 V forces shutdown."
      },
      {
        "number": "4",
        "name": "RON",
        "type": "input",
        "description": "On-time programming pin. A resistor from RON to VIN sets the high-side switch on-time as a function of VIN, giving nearly constant switching frequency. Minimum recommended on-time is 100 ns at maximum VIN."
      },
      {
        "number": "5",
        "name": "FB",
        "type": "input",
        "description": "Feedback pin, connected to the inverting input of the internal regulation comparator. Internal reference is 1.225 V; set output voltage with an external divider from VOUT to FB to RTN."
      },
      {
        "number": "6",
        "name": "VCC",
        "type": "power_out",
        "description": "Output of the internal high-voltage series pass regulator, regulated at 7.6 V. Provides bias for the gate drivers and internal circuitry. Bypass with a 1.0-uF ceramic capacitor to RTN."
      },
      {
        "number": "7",
        "name": "BST",
        "type": "power_in",
        "description": "Bootstrap capacitor pin for the high-side gate driver. Connect a 0.01-uF ceramic capacitor between BST and SW. The BST capacitor is refreshed from VCC through an internal diode while SW is low."
      },
      {
        "number": "8",
        "name": "SW",
        "type": "output",
        "description": "Switching node between the integrated high-side and low-side power MOSFETs. Connect to the output inductor and to the bottom plate of the bootstrap capacitor. Absolute max SW to RTN is -1.5 V (steady) / -5 V (100-ns transient)."
      },
      {
        "number": "9",
        "name": "EP",
        "type": "power_in",
        "description": "Exposed thermal pad on the underside of the package. Must be electrically connected to the RTN pin and tied to the system ground plane for reduced thermal resistance."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/1912202024_Texas-Instruments-LM5019MRX-NOPB_C471034.pdf",
        "pages": 35,
        "sha256": "994feed72dee9bcb",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 9,
        "described": 9,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -1.905
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-8_3.9x4.9mm_P1.27mm@sha256:074ecb2092b24fa4",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "lm5019mrx.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm5019mrx-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "0de0f9432c20be006e7db9bd84bb6ce9d0a8d1bb3ee97554ff4280ee460dd022",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SO-8-EP",
      "Category": "PMIC",
      "Pins": "9"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lm5019mrx"
  ],
  "discovery_pitch": "LM5019MRX (Texas Instruments) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm5019mrx.kicad_sym",
    "lm5019mrx.kicad_mod",
    "lm5019mrx.glb",
    "lm5019mrx.step",
    "lm5019mrx.lbr",
    "docs/hero.png",
    "docs/lm5019mrx-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm5019mrx-etched.step"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "LM5019MRX",
      "kind": "packaging"
    },
    {
      "mpn": "LM5019MRXSD",
      "kind": "packaging"
    },
    {
      "mpn": "LM5019MRXSDX",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-28T17:00:45.233Z"
}