L5991AD

{
  "slug": "l5991ad",
  "version": "0.1.0",
  "type": "component",
  "description": "STMicroelectronics AC-DC Controllers And Regulators, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "l5991ad",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "l5991ad.kicad_sym",
    "l5991ad.kicad_mod",
    "l5991ad.glb",
    "l5991ad.step",
    "l5991ad.lbr",
    "docs/hero.png",
    "docs/l5991ad-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "l5991ad-hero.glb",
    "l5991ad-hero.overlay.json"
  ],
  "component": {
    "mpn": "L5991AD",
    "manufacturer": "STMicroelectronics",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586194053762830336",
    "parts": {
      "symbol": "l5991ad.kicad_sym",
      "footprint": "l5991ad.kicad_mod",
      "model_3d": "l5991ad-hero.glb",
      "model_3d_plain": "l5991ad.glb",
      "model_3d_step": "l5991ad-etched.step",
      "model_3d_step_plain": "l5991ad.step",
      "lbr": "l5991ad.lbr"
    },
    "distributor_links": {
      "lcsc": "C10655",
      "digikey": "497-L5991AD-ND",
      "mouser": "511-L5991AD"
    },
    "distributor_check": {
      "checked_at": "2026-10-05T22:05:43Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-L5991AD-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "511-L5991AD",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SYNC",
        "type": "bidirectional",
        "description": "Synchronization pin operating as clock output in master mode (7mA typical source capability, 4V amplitude) or edge-triggered slave input for external frequency synchronization."
      },
      {
        "number": "2",
        "name": "RCT",
        "type": "bidirectional",
        "description": "Oscillator timing node connected to external RC network for frequency control; internal circuit charges and discharges timing capacitor between 1V valley and 3V peak."
      },
      {
        "number": "3",
        "name": "DC",
        "type": "input",
        "description": "Duty cycle control input; voltage 1-3V sets maximum duty cycle between 0% and upper limit Dx, <1V inhibits output, floating or >3V selects maximum."
      },
      {
        "number": "4",
        "name": "VREF",
        "type": "power_out",
        "description": "5.0V±1.5% reference voltage output (0.4mV/°C temperature coefficient, 2mV line regulation, 2mV load regulation at 1-10mA output current)."
      },
      {
        "number": "5",
        "name": "VFB",
        "type": "input",
        "description": "Error amplifier inverting input for feedback signal; compared to internal 2.5V reference with 60-90dB open-loop gain and 1.7-4MHz unity-gain bandwidth."
      },
      {
        "number": "6",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier output for frequency compensation network connection; voltage monitored for standby frequency reduction at light load."
      },
      {
        "number": "7",
        "name": "SS",
        "type": "output",
        "description": "Soft-start control pin; external capacitor charged by 14-26µA current source (at 25°C) ramping to 7V clamp voltage for smooth power-up."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Signal circuit supply; 7.8-9V startup threshold (L5991A) with 7-8.2V minimum operating voltage (L5991A) and internal 25V zener clamp."
      },
      {
        "number": "9",
        "name": "VC",
        "type": "power_in",
        "description": "Power stage driver supply that absorbs pulsed current when driving external switch gate; buffer capacitor recommended near IC."
      },
      {
        "number": "10",
        "name": "OUT",
        "type": "output",
        "description": "Totem-pole driver output to external power switch; 1.6A peak source (NPN Darlington), 2A peak sink (VDMOS), 13V internal gate clamp, 20-100ns rise/fall time."
      },
      {
        "number": "11",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground; return path for pulsed gate drive current loop to external switch."
      },
      {
        "number": "12",
        "name": "SGND",
        "type": "power_in",
        "description": "Signal ground; reference point for all control circuitry and external control signal returns."
      },
      {
        "number": "13",
        "name": "ISEN",
        "type": "input",
        "description": "Current sense input from external resistor hot lead; 100ns internal leading-edge blanking, 1.1-1.3V fault threshold, 2.85-3.15V/V transfer gain."
      },
      {
        "number": "14",
        "name": "DIS",
        "type": "input",
        "description": "Device disable control input; threshold >2.5V triggers shutdown with restart requiring VCC below UVLO, must be tied to SGND if unused."
      },
      {
        "number": "15",
        "name": "DC-LIM",
        "type": "input",
        "description": "Duty cycle limit control; connection to VREF sets maximum duty cycle to approximately 50%, floating or grounded allows full maximum duty cycle."
      },
      {
        "number": "16",
        "name": "ST-BY",
        "type": "input",
        "description": "Standby mode control input; resistor RB to RCT pin sets normal frequency (fosc), connect to VREF or leave floating to enable light-load mode (<13% rated power)."
      }
    ],
    "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": [
          "extractor flagged: All pin specifications extracted from PIN FUNCTIONS table and PIN CONNECTION diagram on page 2 of da"
        ],
        "pages_sent": 19,
        "cost_usd": 0.1735,
        "at": "2026-10-05T22:05:26"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586194053762830336",
        "pages": 19,
        "sha256": "a0e39653f17acfa3",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    }
  }
}