MP9942GJ-Z

{
  "slug": "mp9942gj-z",
  "version": "0.1.0",
  "type": "component",
  "description": "Monolithic Power Systems DC-DC Converters, TSOT-23-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "mp9942gj-z",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "mp9942gj-z.kicad_sym",
    "mp9942gj-z.kicad_mod",
    "mp9942gj-z.glb",
    "mp9942gj-z.step",
    "mp9942gj-z.lbr",
    "docs/hero.png",
    "docs/mp9942gj-z-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mp9942gj-z-hero.glb",
    "mp9942gj-z-hero.overlay.json",
    "mp9942gj-z-etched.glb"
  ],
  "component": {
    "mpn": "MP9942GJ-Z",
    "manufacturer": "Monolithic Power Systems",
    "package": "TSOT-23-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586204373147508736",
    "parts": {
      "symbol": "mp9942gj-z.kicad_sym",
      "footprint": "mp9942gj-z.kicad_mod",
      "model_3d": "mp9942gj-z-hero.glb",
      "model_3d_plain": "mp9942gj-z-etched.glb",
      "model_3d_step": "mp9942gj-z-etched.step",
      "model_3d_step_plain": "mp9942gj-z.step",
      "lbr": "mp9942gj-z.lbr"
    },
    "distributor_links": {
      "lcsc": "C118209"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T18:44:46Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PG",
        "type": "output",
        "description": "Open-drain power-good output that goes high when VOUT exceeds 90% of nominal and is pulled low at 84%; it sinks at most 0.3V at 4mA and needs an external pull-up (e.g. 100kΩ) to VCC or another voltage."
      },
      {
        "number": "2",
        "name": "IN",
        "type": "power_in",
        "description": "Supply input for the 4V to 36V continuous operating range; decouple with a ceramic input capacitor placed as close to IN and GND as possible and connect with a wide PCB trace."
      },
      {
        "number": "3",
        "name": "SW",
        "type": "output",
        "description": "Switch output node that drives the inductor; absolute maximum rating is -0.3V to 41V, and it should be connected with a wide PCB trace."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "System ground and reference for the regulated output; connect to a large copper ground plane with vias near the pin."
      },
      {
        "number": "5",
        "name": "BST",
        "type": "passive",
        "description": "Bootstrap pin that, with a capacitor from SW, forms the floating high-side driver supply; a 20Ω series resistor is recommended, and VBS must not exceed VSW+6V."
      },
      {
        "number": "6",
        "name": "EN/SYNC",
        "type": "input",
        "description": "Enable input (high enables, low shuts down; floating shuts down via internal 500kΩ pull-down) that also accepts an external clock from 200kHz to 2.2MHz; it is Zener-clamped at 6.5V and must be limited to 6V or less if driven directly without a pull-up resistor."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_out",
        "description": "Internal 5V bias regulator output (4.6V to 5.2V at ICC=0mA) that must be decoupled with 0.1µF to 0.22µF and not exceed 0.22µF."
      },
      {
        "number": "8",
        "name": "FB",
        "type": "input",
        "description": "Feedback input connected to the output resistor divider tap, referenced to 0.792V, and it causes frequency fold-back when below 660mV to prevent current-limit runaway during a short."
      }
    ],
    "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: Pin 1 PG is an open-drain output; the schema has no open-drain class, so it is typed as 'output'. Pi"
        ],
        "pages_sent": 21,
        "cost_usd": 0.0764,
        "at": "2026-10-18T18:42:31"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586204373147508736",
        "pages": 21,
        "sha256": "05378bc62b8ab9d7",
        "source_tier": "lcsc"
      },
      "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"
    },
    "models_3d": [
      {
        "file": "mp9942gj-z.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          0.95
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "dc644a91883054d8f75e38542e63c2050dc8f2e8b7f12e1c57dcd93245fbd473",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mp9942gj-z-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          0.95
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "0b726c97ad1950990f907d2b63a393165f8ff3caad2456b61713801016800dae",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}