ETA8121S2G

{
  "slug": "eta8121s2g",
  "version": "0.1.0",
  "type": "component",
  "description": "etasolution DC-DC Converters, SOT23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "eta8121s2g",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "eta8121s2g.kicad_sym",
    "eta8121s2g.kicad_mod",
    "eta8121s2g.glb",
    "eta8121s2g.step",
    "eta8121s2g.lbr",
    "docs/hero.png",
    "docs/eta8121s2g-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "eta8121s2g-hero.glb",
    "eta8121s2g-hero.overlay.json"
  ],
  "component": {
    "mpn": "ETA8121S2G",
    "manufacturer": "etasolution",
    "package": "SOT23-6",
    "pin_count": 6,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8554718596369903616",
    "parts": {
      "symbol": "eta8121s2g.kicad_sym",
      "footprint": "eta8121s2g.kicad_mod",
      "model_3d": "eta8121s2g-hero.glb",
      "model_3d_plain": "eta8121s2g.glb",
      "model_3d_step": "eta8121s2g-etched.step",
      "model_3d_step_plain": "eta8121s2g.step",
      "lbr": "eta8121s2g.lbr"
    },
    "distributor_links": {
      "lcsc": "C7465509"
    },
    "distributor_check": {
      "checked_at": "2026-10-09T05:36:18Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "BST",
        "type": "passive",
        "description": "Bootstrap pin for the high-side gate drive; connect a 10nF capacitor from this pin to SW, and BST voltage is rated to SW+6V (absolute maximum)."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device; the input capacitor should be placed with its GND return as close as possible to the IC's GND pin, with the GND trace running underneath the IC body."
      },
      {
        "number": "3",
        "name": "FB",
        "type": "input",
        "description": "Feedback input that connects to the external resistor divider from VOUT to set the output voltage (VOUT = 0.8V × (1 + Ru/Rd)), with FB absolute maximum rated at -0.3V to 6V."
      },
      {
        "number": "4",
        "name": "EN",
        "type": "input",
        "description": "Enable pin that is driven high to enable the part and low to disable it, with an absolute maximum rating of 24V and a rising threshold of 1.3V to 1.9V."
      },
      {
        "number": "5",
        "name": "VIN",
        "type": "power_in",
        "description": "Supply voltage input for the regulator, operating from 4.2V to 18V and to be bypassed with a 4.7μF ceramic capacitor to GND, with an absolute maximum rating of 24V."
      },
      {
        "number": "6",
        "name": "SW",
        "type": "output",
        "description": "Inductor connection (switch node) for the internal power switches, rated -0.3V (-5V <10ns) to 24V (25V <10ns) and used with the external output capacitors to GND."
      }
    ],
    "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 gives a single package (SOT23-6) for ETA8121S2G, so the pinout applies directly. Pin numbe; Pin 5 is named VIN in the pin table but IN in the absolute maximum ratings and the block/application; Pin 6 (SW) description in the datasheet says 'Connect two 22uF capacitors from this pin to GND', whi"
        ],
        "pages_sent": 7,
        "cost_usd": 0.0371,
        "at": "2026-10-09T05:34:51"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8554718596369903616",
        "pages": 7,
        "sha256": "00dbfb33b9d42f54",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 6,
        "described": 6,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "eta8121s2g.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "c9fe686b4d1b56927a41fa84a9bc1efb61d8a45a123a3db43bcaa05c2891d635",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "eta8121s2g-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "13f265935238a037d0f26a1aedbf8e0465f5cd2532ab9b4f9196b1c396118014",
        "checked": "2026-10-09",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}