VIPER22ASTR-E

{
  "schema_version": 1,
  "type": "component",
  "slug": "viper22astr-e",
  "title": "VIPER22ASTR-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",
    "viper22astr-e"
  ],
  "component": {
    "mpn": "VIPER22ASTR-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/viper22astr-e.pdf",
    "parts": {
      "symbol": "viper22astr-e.kicad_sym",
      "footprint": "viper22astr-e.kicad_mod",
      "model_3d": "viper22astr-e-etched.glb",
      "model_3d_plain": "viper22astr-e.glb",
      "model_3d_step": "viper22astr-e-etched.step",
      "model_3d_step_plain": "viper22astr-e.step",
      "lbr": "viper22astr-e.lbr"
    },
    "distributor_links": {
      "lcsc": "C9216"
    },
    "pins": [
      {
        "number": "1",
        "name": "SOURCE",
        "type": "power_in",
        "description": "Power MOSFET source and circuit ground reference. Pin 1 and pin 2 are internally connected to the same SOURCE node and are the ground return for VDD and FB."
      },
      {
        "number": "2",
        "name": "SOURCE",
        "type": "power_in",
        "description": "Power MOSFET source and circuit ground reference (second SOURCE pin, internally tied to pin 1)."
      },
      {
        "number": "3",
        "name": "FB",
        "type": "input",
        "description": "Feedback input for current-mode PWM regulation. Useful voltage range 0 V to 1 V; the pin is current-sensitive (typically driven by an optocoupler). Peak drain current is defined by IFB; shorting FB to SOURCE yields the peak current limit IDlim (typ 0.7 A). Absolute-max IFB = 3 mA; internal input impedance ~1.2 kΩ."
      },
      {
        "number": "4",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply for the internal control circuits. Operating range 9 V to 38 V; absolute max 50 V. VDDon start-up threshold typ 14.5 V (13-16 V), VDDoff undervoltage lockout typ 8 V (7-9 V), overvoltage shutdown VDDovp typ 42 V. During start-up VDD is charged from DRAIN through the internal HV current source; in normal operation it is fed by the auxiliary transformer winding."
      },
      {
        "number": "5",
        "name": "DRAIN",
        "type": "power_in",
        "description": "Power MOSFET drain. Also used by the internal high-voltage current source during start-up to charge the external VDD capacitor. BVDSS = 730 V (min); absolute-max VDS(sw) = -0.3 … 730 V; rDS(on) typ 15 Ω. Pins 5, 6, 7, 8 are internally tied to the same DRAIN node and should all be connected together with a large copper area for thermal dissipation."
      },
      {
        "number": "6",
        "name": "DRAIN",
        "type": "power_in",
        "description": "Power MOSFET drain (second DRAIN pin, internally tied to pin 5)."
      },
      {
        "number": "7",
        "name": "DRAIN",
        "type": "power_in",
        "description": "Power MOSFET drain (third DRAIN pin, internally tied to pin 5)."
      },
      {
        "number": "8",
        "name": "DRAIN",
        "type": "power_in",
        "description": "Power MOSFET drain (fourth DRAIN pin, internally tied to pin 5)."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.st.com/resource/en/datasheet/viper22astr-e.pdf",
        "pages": 21,
        "sha256": "9d66a04887088780",
        "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"
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "SO-8",
      "Category": "PMIC",
      "Pins": "8"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "viper22astr-e"
  ],
  "discovery_pitch": "VIPER22ASTR-E (STMicroelectronics) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "viper22astr-e.kicad_sym",
    "viper22astr-e.kicad_mod",
    "viper22astr-e.glb",
    "viper22astr-e.step",
    "viper22astr-e-etched.step",
    "viper22astr-e.lbr",
    "docs/hero.png",
    "docs/viper22astr-e-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "VIPER22ASTR-E",
      "kind": "packaging"
    },
    {
      "mpn": "VIPer22AS-E",
      "kind": "unknown"
    },
    {
      "mpn": "VIPer22ADIP-E",
      "kind": "unknown"
    }
  ],
  "updated_at": "2026-09-25T13:54:54.943Z"
}