L5991D

{
  "slug": "l5991d",
  "version": "0.1.0",
  "type": "component",
  "description": "STMicroelectronics AC-DC Controllers And Regulators, SO-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "l5991d",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "l5991d.kicad_sym",
    "l5991d.kicad_mod",
    "l5991d.glb",
    "l5991d.step",
    "l5991d.lbr",
    "docs/hero.png",
    "docs/l5991d-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "l5991d-hero.glb",
    "l5991d-hero.overlay.json"
  ],
  "component": {
    "mpn": "L5991D",
    "manufacturer": "STMicroelectronics",
    "package": "SO-16",
    "pin_count": 16,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590905763953131520",
    "parts": {
      "symbol": "l5991d.kicad_sym",
      "footprint": "l5991d.kicad_mod",
      "model_3d": "l5991d-hero.glb",
      "model_3d_plain": "l5991d.glb",
      "model_3d_step": "l5991d-etched.step",
      "model_3d_step_plain": "l5991d.step",
      "lbr": "l5991d.lbr"
    },
    "distributor_links": {
      "lcsc": "C5267800",
      "digikey": "497-14768-5-ND",
      "mouser": "511-L5991D"
    },
    "distributor_check": {
      "checked_at": "2026-10-05T23:21:31Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-14768-5-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "511-L5991D",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SYNC",
        "type": "bidirectional",
        "description": "Synchronization pulse input/output for master-slave PWM cycle control or oscillator frequency synchronization."
      },
      {
        "number": "2",
        "name": "RCT",
        "type": "passive",
        "description": "Oscillator timing pin for external RC frequency-setting components (RA, RB, CT)."
      },
      {
        "number": "3",
        "name": "DC",
        "type": "input",
        "description": "Duty cycle control input voltage (1-3V nominal) setting maximum PWM duty cycle from 0% to Dx."
      },
      {
        "number": "4",
        "name": "VREF",
        "type": "power_out",
        "description": "5.0V ±1.5% reference voltage output capable of supplying external circuit biasing networks."
      },
      {
        "number": "5",
        "name": "VFB",
        "type": "input",
        "description": "Error amplifier inverting input for feedback voltage comparison with internal 2.5V reference."
      },
      {
        "number": "6",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier output for frequency compensation network connection and standby operation monitoring."
      },
      {
        "number": "7",
        "name": "SS",
        "type": "passive",
        "description": "Soft-start capacitor connection node charged during power-up to approximately 7V for current-limiting control."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Controller signal supply voltage input (12-20V typical, ICC<50mA), with internal 25V Zener clamp."
      },
      {
        "number": "9",
        "name": "VC",
        "type": "power_in",
        "description": "Power stage driver supply voltage input (12-20V typical) with high pulsed current capability for gate drive."
      },
      {
        "number": "10",
        "name": "OUT",
        "type": "output",
        "description": "High-current totem-pole gate driver output for external power MOSFET with 1A peak drive capability and 13V internal clamp."
      },
      {
        "number": "11",
        "name": "PGND",
        "type": "power_in",
        "description": "Power section ground return path for gate driver current loop closure."
      },
      {
        "number": "12",
        "name": "SGND",
        "type": "power_in",
        "description": "Signal section ground reference for control and feedback circuits."
      },
      {
        "number": "13",
        "name": "ISEN",
        "type": "input",
        "description": "Current sense input connected to primary switch sense resistor for pulse-by-pulse current limiting with 100ns leading-edge blanking."
      },
      {
        "number": "14",
        "name": "DIS",
        "type": "input",
        "description": "Disable control input that shuts down IC when voltage exceeds 2.5V; must be tied to SGND if unused."
      },
      {
        "number": "15",
        "name": "DC-LIM",
        "type": "input",
        "description": "Maximum duty cycle limit control; tie to VREF for 50% maximum duty cycle or leave floating for unrestricted maximum."
      },
      {
        "number": "16",
        "name": "ST-BY",
        "type": "passive",
        "description": "Standby function control pin with external resistor RB for light-load oscillator frequency reduction."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 23,
        "cost_usd": 0.1812,
        "at": "2026-10-05T23:21:16"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590905763953131520",
        "pages": 23,
        "sha256": "cbc01f22c7c35f41",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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  }
}