VIPER12ASTR-E

{
  "schema_version": 1,
  "type": "component",
  "slug": "viper12astr-e",
  "title": "VIPER12ASTR-E",
  "brief": "STMicroelectronics AC-DC Controllers and Regulators, SO-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "viper12astr-e"
  ],
  "component": {
    "mpn": "VIPER12ASTR-E",
    "manufacturer": "STMicroelectronics",
    "package": "SO-8",
    "pin_count": 8,
    "category": "PMIC",
    "subcategory": "AC-DC Controllers and Regulators",
    "datasheet": "https://www.st.com/resource/en/datasheet/viper12astr-e.pdf",
    "parts": {
      "symbol": "viper12astr-e.kicad_sym",
      "footprint": "viper12astr-e.kicad_mod",
      "model_3d": "viper12astr-e-etched.glb",
      "model_3d_plain": "viper12astr-e.glb",
      "model_3d_step": "viper12astr-e-etched.step",
      "model_3d_step_plain": "viper12astr-e.step",
      "lbr": "viper12astr-e.lbr"
    },
    "distributor_links": {
      "lcsc": "C7522"
    },
    "pins": [
      {
        "number": "1",
        "name": "SOURCE",
        "type": "power_in",
        "description": "Power MOSFET source and circuit ground reference. Tied together with pin 2 (both SOURCE pins are the internal MOSFET source and the IC ground reference)."
      },
      {
        "number": "2",
        "name": "SOURCE",
        "type": "power_in",
        "description": "Power MOSFET source and circuit ground reference. Second SOURCE pin, internally connected to pin 1."
      },
      {
        "number": "3",
        "name": "FB",
        "type": "input",
        "description": "Feedback input. Useful voltage range extends from 0 V to 1 V and defines the peak drain MOSFET current. Current limitation (maximum drain current) is obtained by shorting FB to SOURCE. Input impedance R_FB ~ 1.2 kΩ; I_FB shutdown current ~ 0.9 mA."
      },
      {
        "number": "4",
        "name": "VDD",
        "type": "power_in",
        "description": "Power supply of the control circuits (9 V to 38 V operating range). Also provides charging current during start-up via the high-voltage current source connected to DRAIN. Hysteresis comparator monitors VDD with V_DDon ≈ 14.5 V (starts switching, turns off start-up current source) and V_DDoff ≈ 8 V (stops switching, turns on start-up current source). V_DDovp ≈ 42 V overvoltage threshold."
      },
      {
        "number": "5",
        "name": "DRAIN",
        "type": "power_out",
        "description": "Power MOSFET drain. Also used by the internal high-voltage current source during start-up phase to charge the external VDD capacitor. BV_DSS = 730 V. Pins 5, 6, 7, 8 are internally connected together (multiple DRAIN pins improve thermal dissipation - connect all to the drain node and copper pour, at least 200 mm² of 35 µm Cu)."
      },
      {
        "number": "6",
        "name": "DRAIN",
        "type": "power_out",
        "description": "Power MOSFET drain. Internally connected to pins 5, 7 and 8. Tie to the drain net for thermal spreading."
      },
      {
        "number": "7",
        "name": "DRAIN",
        "type": "power_out",
        "description": "Power MOSFET drain. Internally connected to pins 5, 6 and 8. Tie to the drain net for thermal spreading."
      },
      {
        "number": "8",
        "name": "DRAIN",
        "type": "power_out",
        "description": "Power MOSFET drain. Internally connected to pins 5, 6 and 7. Tie to the drain net for thermal spreading."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.st.com/resource/en/datasheet/viper12astr-e.pdf",
        "pages": 21,
        "sha256": "7311adf78816dd66",
        "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"
    },
    "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": "viper12astr-e.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": "viper12astr-e-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": "06c9c31f4a16e920471496cb2b5490fea97596f73aa5c549d1d9f30b9f6aed0a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "SO-8",
      "Category": "PMIC",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "viper12astr-e"
  ],
  "discovery_pitch": "VIPER12ASTR-E (STMicroelectronics) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "viper12astr-e.kicad_sym",
    "viper12astr-e.kicad_mod",
    "viper12astr-e.glb",
    "viper12astr-e.step",
    "viper12astr-e-etched.step",
    "viper12astr-e.lbr",
    "docs/hero.png",
    "docs/viper12astr-e-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "VIPER12ASTR-E",
      "kind": "packaging"
    },
    {
      "mpn": "VIPER12AS-E",
      "kind": "unknown"
    },
    {
      "mpn": "VIPER12ADIP-E",
      "kind": "unknown"
    }
  ],
  "updated_at": "2026-09-25T13:54:29.868Z"
}