LTC3621EMS8E-2#PBF

{
  "slug": "ltc3621ems8e-2-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",
    "ltc3621ems8e-2#pbf",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ltc3621ems8e-2-pbf.kicad_sym",
    "ltc3621ems8e-2-pbf.kicad_mod",
    "ltc3621ems8e-2-pbf.glb",
    "ltc3621ems8e-2-pbf.step",
    "ltc3621ems8e-2-pbf.lbr",
    "docs/hero.png",
    "docs/ltc3621ems8e-2-pbf-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ltc3621ems8e-2-pbf-hero.glb",
    "ltc3621ems8e-2-pbf-hero.overlay.json",
    "ltc3621ems8e-2-pbf-etched.glb"
  ],
  "component": {
    "mpn": "LTC3621EMS8E-2#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/ltc3621-3621-2.pdf",
    "parts": {
      "symbol": "ltc3621ems8e-2-pbf.kicad_sym",
      "footprint": "ltc3621ems8e-2-pbf.kicad_mod",
      "model_3d": "ltc3621ems8e-2-pbf-hero.glb",
      "model_3d_plain": "ltc3621ems8e-2-pbf-etched.glb",
      "model_3d_step": "ltc3621ems8e-2-pbf-etched.step",
      "model_3d_step_plain": "ltc3621ems8e-2-pbf.step",
      "lbr": "ltc3621ems8e-2-pbf.lbr"
    },
    "distributor_links": {
      "lcsc": "C685312",
      "digikey": "LTC3621EMS8E-2#PBF-ND",
      "mouser": "584-C3621EMS8E-2PBF"
    },
    "distributor_check": {
      "checked_at": "2026-10-30T16:04:13Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "LTC3621EMS8E-2#PBF-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "584-C3621EMS8E-2PBF",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SW",
        "type": "output",
        "description": "Switch node connection to the inductor of the step-down regulator."
      },
      {
        "number": "2",
        "name": "VIN",
        "type": "power_in",
        "description": "Input voltage of the step-down regulator, operating range 2.7V to 17V."
      },
      {
        "number": "3",
        "name": "RUN",
        "type": "input",
        "description": "Logic-controlled RUN input where logic high activates the step-down regulator; it must not be left floating, and RUN voltage is limited to VIN to -0.3V."
      },
      {
        "number": "4",
        "name": "PGOOD",
        "type": "output",
        "description": "VOUT within regulation indicator for the MSOP package only; PGOOD voltages are limited to 6V to -0.3V."
      },
      {
        "number": "5",
        "name": "FB",
        "type": "input",
        "description": "Feedback input to the error amplifier, where VOUT = 0.6V • [1 + (R2/R1)] sets the output from 0.6V to VIN via a resistor divider tap."
      },
      {
        "number": "6",
        "name": "INTVCC",
        "type": "power_out",
        "description": "Low dropout regulator output that must be bypassed with at least 1µF to ground."
      },
      {
        "number": "7",
        "name": "MODE/SYNC",
        "type": "input",
        "description": "Selects Burst Mode operation with a 400mA peak current clamp when tied to INTVCC, pulse-skipping when tied to GND, or forced continuous mode when tied between 1V and VINTVCC - 1.2V; an external clock applied here syncs the switching frequency and forces continuous mode."
      },
      {
        "number": "8",
        "name": "SGND",
        "type": "power_in",
        "description": "Signal ground for the MSOP package only."
      },
      {
        "number": "9",
        "name": "GND",
        "type": "power_in",
        "description": "Exposed pad that serves as the ground backplane for power and signal ground and must be soldered to PCB ground."
      }
    ],
    "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 names PGOOD as a VOUT-in-regulation indicator and gives only its voltage limits; it does n; Datasheet gives no electrical type for SW; 'output' is an inferred KiCad class based on its function; Datasheet gives no electrical limits for INTVCC beyond the 1µF bypass requirement; 'power_out' is in"
        ],
        "pages_sent": 10,
        "cost_usd": 0.0648,
        "at": "2026-10-30T16:03:54"
      },
      "datasheet": {
        "url": "https://www.analog.com/media/en/technical-documentation/data-sheets/ltc3621-3621-2.pdf",
        "pages": 20,
        "sha256": "82b884bf58700a7a",
        "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": "ltc3621ems8e-2-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": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ltc3621ems8e-2-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": "e23024ce5ecebde7ad5290e19d32779519544d200b182c1dc467abbef2b40188",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "MS8E",
      "source_page": 18,
      "D": {
        "nom_mm": 3.0,
        "range_mm": [
          null,
          null
        ]
      },
      "E1": {
        "nom_mm": 3.0,
        "range_mm": [
          null,
          null
        ]
      },
      "E": {
        "nom_mm": 4.9,
        "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": "ltc3621ems8e-2-pbf.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}