VIPER35LD

{
  "schema_version": 1,
  "type": "component",
  "slug": "viper35ld",
  "title": "VIPER35LD",
  "brief": "STMicroelectronics AC-DC Controllers And Regulators, SO-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management (pmic)",
    "viper35ld",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "VIPER35LD",
    "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/8590456089570811904",
    "parts": {
      "symbol": "viper35ld.kicad_sym",
      "footprint": "viper35ld.kicad_mod",
      "model_3d": "viper35ld-hero.glb",
      "model_3d_plain": "viper35ld.glb",
      "model_3d_step": "viper35ld-etched.step",
      "model_3d_step_plain": "viper35ld.step",
      "lbr": "viper35ld.lbr"
    },
    "distributor_links": {
      "lcsc": "C5267827",
      "digikey": "497-16075-5-ND",
      "mouser": "511-VIPER35LD"
    },
    "distributor_check": {
      "checked_at": "2026-10-10T15:58:07Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-16075-5-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "511-VIPER35LD",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground and source of the power MOSFET."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground and source of the power MOSFET."
      },
      {
        "number": "3",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Not internally connected; it can be connected to GND."
      },
      {
        "number": "4",
        "name": "N.A.",
        "type": "passive",
        "description": "Not available for user; mechanically connected to the controller die pad and should be connected to GND (pins 1, 2) to improve noise immunity."
      },
      {
        "number": "5",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply voltage of the control section; this pin provides the charging current of the external capacitor during power-up."
      },
      {
        "number": "6",
        "name": "ZCD",
        "type": "input",
        "description": "Multifunction pin used for zero-current detection for quasi-resonant operation, drain current limit (IDlim) setup, feed-forward compensation (RFF) setup, and output overvoltage protection (ROVP/RLIM) setup."
      },
      {
        "number": "7",
        "name": "FB",
        "type": "input",
        "description": "Control input for duty cycle control; a voltage below threshold VFBbm activates burst-mode operation and a level close to VFBlin means the cycle-by-cycle overcurrent setpoint is close."
      },
      {
        "number": "8",
        "name": "BR",
        "type": "input",
        "description": "Brown-out protection input with hysteresis; a voltage below VBRth shuts down (not latch) the device, which restarts when the voltage exceeds VBRth + VBRhyst, and it must be connected to ground when not used."
      },
      {
        "number": "9",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Not internally connected; must be left floating to get a safe clearance distance."
      },
      {
        "number": "10",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Not internally connected; must be left floating to get a safe clearance distance."
      },
      {
        "number": "11",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Not internally connected; must be left floating to get a safe clearance distance."
      },
      {
        "number": "12",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Not internally connected; must be left floating to get a safe clearance distance."
      },
      {
        "number": "13",
        "name": "DRAIN",
        "type": "passive",
        "description": "High voltage drain pin from which the built-in high voltage switched start-up bias current is drawn; pins connected to the metal frame facilitate heat dissipation."
      },
      {
        "number": "14",
        "name": "DRAIN",
        "type": "passive",
        "description": "High voltage drain pin from which the built-in high voltage switched start-up bias current is drawn; pins connected to the metal frame facilitate heat dissipation."
      },
      {
        "number": "15",
        "name": "DRAIN",
        "type": "passive",
        "description": "High voltage drain pin from which the built-in high voltage switched start-up bias current is drawn; pins connected to the metal frame facilitate heat dissipation."
      },
      {
        "number": "16",
        "name": "DRAIN",
        "type": "passive",
        "description": "High voltage drain pin from which the built-in high voltage switched start-up bias current is drawn; pins connected to the metal frame facilitate heat dissipation."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Datasheet lists pin 4 as N.A. (not available for user) and says it should be connected to GND; the E; Datasheet gives no KiCad ERC electrical type for these pins; types input/passive were assigned from ; Pins 1-2 (GND) and pins 3, 9-12 (N.C.) are shown as printed in Table 2; the datasheet does not state",
          "1/16 pins cited to the wrong page (name found elsewhere): ['11:N.C.@p4']"
        ],
        "pages_sent": 18,
        "cost_usd": 0.0578,
        "at": "2026-10-10T15:57:49"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590456089570811904",
        "pages": 38,
        "sha256": "e4cfc539b430a68d",
        "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"
    },
    "models_3d": [
      {
        "file": "viper35ld.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          9.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "viper35ld-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          9.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "0d6d48c4d95f46010b0744bce73dfbe5ad7896920ebfe757112ad11df691276b",
        "checked": "2026-10-10",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "SO-16",
      "Category": "Power Management (PMIC)",
      "Pins": "16"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "viper35ld"
  ],
  "discovery_pitch": "VIPER35LD (STMicroelectronics) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "viper35ld.kicad_sym",
    "viper35ld.kicad_mod",
    "viper35ld.glb",
    "viper35ld.step",
    "viper35ld.lbr",
    "docs/hero.png",
    "docs/viper35ld-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "viper35ld-hero.glb",
    "viper35ld-hero.overlay.json"
  ],
  "visibility": {
    "public": true
  }
}