LT1946AEMS8E#PBF

{
  "slug": "lt1946aems8e-pbf",
  "version": "0.1.0",
  "type": "component",
  "description": "Analog Devices DC-DC Converters, MSOP-8-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management ics",
    "lt1946aems8e#pbf",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lt1946aems8e-pbf.kicad_sym",
    "lt1946aems8e-pbf.kicad_mod",
    "lt1946aems8e-pbf.glb",
    "lt1946aems8e-pbf.step",
    "lt1946aems8e-pbf.lbr",
    "docs/hero.png",
    "docs/lt1946aems8e-pbf-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lt1946aems8e-pbf-hero.glb",
    "lt1946aems8e-pbf-hero.overlay.json",
    "lt1946aems8e-pbf-etched.glb"
  ],
  "component": {
    "mpn": "LT1946AEMS8E#PBF",
    "manufacturer": "Analog Devices",
    "package": "MSOP-8-EP",
    "pin_count": 9,
    "category": "Power Management ICs",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.analog.com/media/en/technical-documentation/data-sheets/1946afs.pdf",
    "parts": {
      "symbol": "lt1946aems8e-pbf.kicad_sym",
      "footprint": "lt1946aems8e-pbf.kicad_mod",
      "model_3d": "lt1946aems8e-pbf-hero.glb",
      "model_3d_plain": "lt1946aems8e-pbf-etched.glb",
      "model_3d_step": "lt1946aems8e-pbf-etched.step",
      "model_3d_step_plain": "lt1946aems8e-pbf.step",
      "lbr": "lt1946aems8e-pbf.lbr"
    },
    "distributor_links": {
      "lcsc": "C665602",
      "digikey": "LT1946AEMS8E#PBF-ND",
      "mouser": "584-LT1946AEMS8E#PBF"
    },
    "distributor_check": {
      "checked_at": "2026-10-31T09:25:29Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "LT1946AEMS8E#PBF-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "584-LT1946AEMS8E#PBF",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VC",
        "type": "passive",
        "description": "Error amplifier output pin for external compensation (series resistor and capacitor to GND, typically 90pF to 270pF and 25k to 120k) or shorted to COMP for internal compensation."
      },
      {
        "number": "2",
        "name": "FB",
        "type": "input",
        "description": "Feedback pin with 1.25V reference voltage; connect the resistive divider tap here, with VOUT = 1.25 • (1+R1/R2)."
      },
      {
        "number": "3",
        "name": "SHDN",
        "type": "input",
        "description": "Shutdown pin; tie to 2.4V or more to enable the device, ground to shut down, and do not float this pin."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin; tie both Pin 4 and the exposed pad directly to the local ground plane for heat dissipation."
      },
      {
        "number": "5",
        "name": "SW",
        "type": "passive",
        "description": "Switch pin, the collector of the internal NPN power switch (1.5A, 36V); minimize the metal trace area to minimize EMI."
      },
      {
        "number": "6",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply pin (2.45V to 16V operating) that must be locally bypassed."
      },
      {
        "number": "7",
        "name": "COMP",
        "type": "passive",
        "description": "Internal compensation pin providing an internal network (120k and 90pF); tie directly to the VC pin for internal compensation or to GND if not used."
      },
      {
        "number": "8",
        "name": "SS",
        "type": "passive",
        "description": "Soft-start pin where an external capacitor is charged by 4µA to 1.5V; use a larger capacitor for slower start-up and leave floating if not in use."
      },
      {
        "number": "9",
        "name": "EP",
        "type": "power_in",
        "description": "Exposed pad is ground and must be soldered to the PCB and tied to the local ground plane."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The exposed pad is not numbered in the datasheet. It is listed here as pin 9 and is internally the s; Types for VC, COMP, SS and SW are chosen as passive. The datasheet gives no ERC class, so confirm th",
          "1/9 pins cited to the wrong page (name found elsewhere): ['9:EP@p4']"
        ],
        "pages_sent": 12,
        "cost_usd": 0.1226,
        "at": "2026-10-31T09:25:12"
      },
      "datasheet": {
        "url": "https://www.analog.com/media/en/technical-documentation/data-sheets/1946afs.pdf",
        "pages": 12,
        "sha256": "84a27bebe27b50dd",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 9,
        "described": 9,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "lt1946aems8e-pbf.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.9,
          3.0,
          0.96
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "43252be3beac8fd30ca9bfeb82a613fa01d5dffff9b22810c13a4655daafb5ee",
        "checked": "2026-10-31",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lt1946aems8e-pbf-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.9,
          3.0,
          0.96
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "6d76e92941b2a1daecad6ea47b1472ad23a362c2869a6092ac06c3af41bf3ad8",
        "checked": "2026-10-31",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "MS8E",
      "source_page": 11,
      "D": {
        "nom_mm": 3.0,
        "range_mm": [
          null,
          null
        ]
      },
      "E1": {
        "nom_mm": 3.0,
        "range_mm": [
          null,
          null
        ]
      },
      "E": {
        "nom_mm": 4.88,
        "range_mm": [
          null,
          null
        ]
      },
      "e": {
        "nom_mm": 0.65,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 1.1,
        "range_mm": [
          null,
          1.1
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "lt1946aems8e-pbf.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}