RT9742EGJ5

{
  "schema_version": 1,
  "type": "component",
  "slug": "rt9742egj5",
  "title": "RT9742EGJ5",
  "brief": "Richtek Tech Power Distribution Switches, TSOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management (pmic)",
    "rt9742egj5",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "RT9742EGJ5",
    "manufacturer": "Richtek Tech",
    "package": "TSOT-23-5",
    "pin_count": 5,
    "category": "Power Management (PMIC)",
    "subcategory": "Power Distribution Switches",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589839266366201856",
    "parts": {
      "symbol": "rt9742egj5.kicad_sym",
      "footprint": "rt9742egj5.kicad_mod",
      "model_3d": "rt9742egj5-hero.glb",
      "model_3d_plain": "rt9742egj5-etched.glb",
      "model_3d_step": "rt9742egj5-etched.step",
      "model_3d_step_plain": "rt9742egj5.step",
      "lbr": "rt9742egj5.lbr"
    },
    "distributor_links": {
      "lcsc": "C3031665",
      "digikey": "1028-1432-2-ND",
      "mouser": "835-RT9742EGJ5"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T00:33:43Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "1028-1432-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "835-RT9742EGJ5",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VOUT",
        "type": "power_out",
        "description": "Switch output voltage, the source of the internal N-MOSFET, which supplies the load."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "3",
        "name": "FLG",
        "type": "output",
        "description": "Active-low N-channel open-drain fault flag output that asserts after about 10 ms of over-current or over-temperature, and needs an external pull-up resistor (10k to 100k)."
      },
      {
        "number": "4",
        "name": "EN/EN",
        "type": "input",
        "description": "Chip enable input (active high or active low depending on version), with VIH 1.5V min and VIL 0.75V max, 0V to 6V range; do not float it."
      },
      {
        "number": "5",
        "name": "VIN",
        "type": "power_in",
        "description": "Power input voltage and drain of the internal MOSFET, with a 2.7V to 6V operating range and 7V absolute maximum; bypass with a 10µF capacitor to GND."
      }
    ],
    "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+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet lists EN polarity per version but the text does not make clear whether the E version i; The ordering table lists RT9742EGJ5 as TSOT-23-5 only. The pinout comes from the shared TSOT-23-5 / ",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 19,
        "cost_usd": 0.2759,
        "at": "2026-10-19T00:30:23"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589839266366201856",
        "pages": 19,
        "sha256": "4512463eff0aa45d",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 5,
        "described": 5,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          0.95
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "5120f0cee43ef7743cc08408d2c12f234fcac7355386e330a3a16f336e23da8d",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Richtek Tech",
      "Package": "TSOT-23-5",
      "Category": "Power Management (PMIC)",
      "Pins": "5"
    },
    "characteristics": {
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      "source": "datasheet",
      "datasheet_sha256": "4512463eff0aa45d4b2c84215163d9a3589d7a0a16a2d37fa7dc20015dd62f14",
      "rows": [
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          "name": "Supply Input Voltage, VIN",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.7,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "EN Voltage",
          "symbol": "EN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 6,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "Junction Temperature Range",
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          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
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        },
        {
          "name": "Ambient Temperature Range",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Supply Input Voltage, VIN",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "EN Voltage",
          "symbol": "EN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 7,
          "conditions": "",
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        },
        {
          "name": "FLAG Voltage",
          "symbol": "FLG",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Power Dissipation, PD (TSOT-23-5)",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 0.49,
          "conditions": "TA = 25°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Lead Temperature (Soldering)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Soldering, 10 sec.",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "ESD Susceptibility HBM",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "kV",
          "min": null,
          "typ": null,
          "max": 2,
          "conditions": "Human Body Model",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Package Thermal Resistance, θJA (TSOT-23-5)",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 203,
          "max": null,
          "conditions": "JEDEC 51-7 four-layer board, TA = 25°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input Quiescent Current",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 30,
          "max": 40,
          "conditions": "Switch on, VOUT = open",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input Shutdown Current",
          "symbol": "ISHDN",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.1,
          "max": 1,
          "conditions": "VIN = 5V, no load on OUT, device OFF, VEN = 0V or VEN = 5V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Switch On Resistance (RT9742XXJ5/V, this variant)",
          "symbol": "RDS(ON)",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 70,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Over Current Trip Threshold (RT9742E group)",
          "symbol": "ITRIP",
          "kind": "electrical",
          "unit": "A",
          "min": 1.55,
          "typ": 2.1,
          "max": 2.25,
          "conditions": "VIN = 5V, 100A/s",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Current Limit (RT9742E group)",
          "symbol": "ILIM",
          "kind": "electrical",
          "unit": "A",
          "min": 1.5,
          "typ": 1.65,
          "max": 1.8,
          "conditions": "VOUT = 1V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "EN/EN Threshold Logic_High Voltage",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 1.5,
          "typ": null,
          "max": null,
          "conditions": "VIN = 2.7V to 6V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "EN/EN Threshold Logic_Low Voltage",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.75,
          "conditions": "VIN = 2.7V to 6V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "EN/EN Input Current",
          "symbol": "IEN",
          "kind": "electrical",
          "unit": "μA",
          "min": 0.5,
          "typ": null,
          "max": 0.5,
          "conditions": "VEN = 0V, VEN = 5V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output Leakage Current",
          "symbol": "ILEAKAGE",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.5,
          "max": 1,
          "conditions": "VEN = 0V, RLOAD = 0",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Reverse Leakage Current",
          "symbol": "IREV",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "VOUT = 5V, VIN = 0V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Reverse Voltage Trip Point",
          "symbol": "VREV",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 200,
          "max": null,
          "conditions": "VOUT vs VIN (comparison symbol lost in extraction)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output Turn-On Rise Time",
          "symbol": "tON_RISE",
          "kind": "timing",
          "unit": "ms",
          "min": null,
          "typ": 1.5,
          "max": null,
          "conditions": "10% to 90% of VOUT rising",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Turn-On Time",
          "symbol": "tON",
          "kind": "timing",
          "unit": "ms",
          "min": null,
          "typ": 2.1,
          "max": null,
          "conditions": "From enable to 90% of VOUT",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "FLG Output Resistance",
          "symbol": "RFLG",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 10,
          "max": null,
          "conditions": "ISINK = 1mA",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "FLG Off Current",
          "symbol": "IFLG_OFF",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.01,
          "max": 1,
          "conditions": "VFLG = 5V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "FLG Delay Time",
          "symbol": "tD",
          "kind": "timing",
          "unit": "ms",
          "min": null,
          "typ": 10,
          "max": null,
          "conditions": "From fault condition to FLG assertion",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Shutdown Auto-Discharge Resistance",
          "symbol": "RDischarge",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 100,
          "max": null,
          "conditions": "VEN = 0V, VEN = 5V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Under-Voltage Lockout",
          "symbol": "VUVLO",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 2.4,
          "conditions": "VIN rising",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Under-Voltage Hysteresis",
          "symbol": "VUVLO",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.1,
          "max": null,
          "conditions": "VIN decreasing",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Thermal Shutdown Protection",
          "symbol": "TSD",
          "kind": "electrical",
          "unit": "°C",
          "min": null,
          "typ": 140,
          "max": null,
          "conditions": "Note 6 (guaranteed by design)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Thermal Shutdown Hysteresis",
          "symbol": "TSD",
          "kind": "electrical",
          "unit": "°C",
          "min": null,
          "typ": 20,
          "max": null,
          "conditions": "Note 6 (guaranteed by design)",
          "source_page": 6,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_triggers": [
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  "discovery_pitch": "RT9742EGJ5 (Richtek Tech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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