LM5109

{
  "schema_version": 1,
  "type": "component",
  "slug": "lm5109",
  "title": "LM5109",
  "brief": "TI 100 V half-bridge MOSFET gate driver, SOIC-8. High + low side, 1 A peak, bootstrap. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "driver",
    "gate-driver",
    "half-bridge",
    "high-side",
    "soic-8",
    "texas-instruments"
  ],
  "component": {
    "mpn": "LM5109",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Driver",
    "subcategory": "Half-bridge gate driver",
    "datasheet": "https://www.ti.com/lit/ds/symlink/lm5109a.pdf",
    "parts": {
      "symbol": "lm5109.kicad_sym",
      "footprint": "lm5109.kicad_mod",
      "model_3d": "lm5109-etched.glb",
      "model_3d_plain": "lm5109.glb",
      "model_3d_step": "lm5109-etched.step",
      "model_3d_step_plain": "lm5109.step",
      "lbr": "lm5109.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive gate drive supply (8V to 14V recommended). Locally decouple to VSS using a low-ESR/ESL capacitor located as close to the IC as possible."
      },
      {
        "number": "2",
        "name": "HI",
        "type": "input",
        "description": "High-side control input. TTL-compatible input thresholds (VIL=0.8V, VIH=2.2V max). Internal ~200kΩ pulldown. Unused HI input should be tied to ground and not left open."
      },
      {
        "number": "3",
        "name": "LI",
        "type": "input",
        "description": "Low-side control input. TTL-compatible input thresholds (VIL=0.8V, VIH=2.2V max). Internal ~200kΩ pulldown. Unused LI input should be tied to ground and not left open."
      },
      {
        "number": "4",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground reference. All signals are referenced to this ground."
      },
      {
        "number": "5",
        "name": "LO",
        "type": "output",
        "description": "Low-side gate driver output. Connect to the gate of the low-side N-MOS device. 1.0A peak source/sink capability."
      },
      {
        "number": "6",
        "name": "HS",
        "type": "passive",
        "description": "High-side source connection. Connect to the negative terminal of the bootstrap capacitor and to the source of the high-side N-MOS device. Recommended operating range -1V to 90V."
      },
      {
        "number": "7",
        "name": "HO",
        "type": "output",
        "description": "High-side gate driver output. Connect to the gate of the high-side N-MOS device. Referenced to HS with 1.0A peak source/sink capability."
      },
      {
        "number": "8",
        "name": "HB",
        "type": "power_in",
        "description": "High-side gate driver positive supply rail (bootstrap). Connect the positive terminal of the bootstrap capacitor to HB and the negative terminal to HS. The bootstrap capacitor should be placed as close to the IC as possible. HB to VSS max 108V."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/lm5109a.pdf",
        "pages": 29,
        "sha256": "808ea6839f052259",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "lm5109.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": "lm5109-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": "f9ed14e02dba19c1a0e120f84a977e3b7b45176210692188ec50a6e6e353f4b6",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "Half-bridge gate driver (high + low side)",
      "Bus voltage": "Up to 100 V",
      "Peak current": "1 A source / sink",
      "Inputs": "Independent HI, LI",
      "Bootstrap": "HB/HS high-side supply",
      "Supply (VDD)": "9-14 V",
      "Package": "SOIC-8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "lm5109",
    "half bridge gate driver",
    "high side low side driver",
    "100v mosfet driver"
  ],
  "discovery_pitch": "TI LM5109 100 V half-bridge MOSFET gate driver (SOIC-8) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm5109.kicad_sym",
    "lm5109.kicad_mod",
    "lm5109.glb",
    "lm5109.step",
    "lm5109.lbr",
    "docs/hero.png",
    "docs/lm5109-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm5109-etched.step"
  ],
  "variants": [
    {
      "mpn": "LM5109AMA (SOIC-8)",
      "kind": "packaging"
    },
    {
      "mpn": "LM5109AMAX (SOIC-8, tape & reel)",
      "kind": "packaging"
    },
    {
      "mpn": "LM5109BMA (matched delay)",
      "kind": "packaging"
    }
  ]
}