LGS4056HEP-4.35

{
  "schema_version": 1,
  "type": "component",
  "slug": "lgs4056hep-4-35",
  "title": "LGS4056HEP-4.35",
  "brief": "Legend Si Battery Management, ESOP-8. 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)",
    "lgs4056hep-4.35",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LGS4056HEP-4.35",
    "manufacturer": "Legend Si",
    "package": "ESOP-8",
    "pin_count": 9,
    "category": "Power Management (PMIC)",
    "subcategory": "Battery Management",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756400426168672256",
    "parts": {
      "symbol": "lgs4056hep-4-35.kicad_sym",
      "footprint": "lgs4056hep-4-35.kicad_mod",
      "model_3d": "lgs4056hep-4-35-hero.glb",
      "model_3d_plain": "lgs4056hep-4-35-etched.glb",
      "model_3d_step": "lgs4056hep-4-35-etched.step",
      "model_3d_step_plain": "lgs4056hep-4-35.step",
      "lbr": "lgs4056hep-4-35.lbr"
    },
    "distributor_links": {
      "lcsc": "C20618072"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T19:03:02Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "TEMP",
        "type": "input",
        "description": "Battery temperature detection input connected to the battery NTC; charging is suspended if the voltage is below 45% or above 80% of the input voltage, and the function is disabled when the pin is grounded or floating."
      },
      {
        "number": "2",
        "name": "PROG",
        "type": "passive",
        "description": "Constant-current charge setting pin; a 1% resistor to ground sets the charge current as 1000/R_PROG (A, R in kΩ) above 300 mA or 900/R_PROG below 300 mA, e.g. 1K gives 1 A and 9K gives 0.1 A, and the pin voltage can be used to monitor charge current."
      },
      {
        "number": "3",
        "name": "GND",
        "type": "power_in",
        "description": "Chip ground, to be connected to the PCB ground plane and the exposed pad."
      },
      {
        "number": "4",
        "name": "VCC",
        "type": "power_in",
        "description": "Power input pin connected to the supply positive terminal; bypass VCC to GND with at least 10 µF effective-value ceramic capacitor placed as close as possible to the pins."
      },
      {
        "number": "5",
        "name": "BAT",
        "type": "power_out",
        "description": "Battery charging output; connect to the battery positive terminal and place at least 10 µF effective-value ceramic capacitor to ground."
      },
      {
        "number": "6",
        "name": "DONE",
        "type": "output",
        "description": "Open-drain full-charge indicator that pulls low when the battery is full to turn on the LED; connect to the LED cathode, or ground it if the indicator is not used."
      },
      {
        "number": "7",
        "name": "CHRG",
        "type": "output",
        "description": "Open-drain charge indicator that pulls low while charging to turn on the LED; connect to the LED cathode, or ground it if the indicator is not used."
      },
      {
        "number": "8",
        "name": "CE",
        "type": "input",
        "description": "Enable input; high level enables charging and low level turns charging off, driven by VCC or an MCU."
      },
      {
        "number": "9",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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: The exposed pad is unnumbered on the package drawing (labelled 'EP PAD'); it is listed as 'EP' and i; The page 3 pin arrangement drawing text is garbled in extraction; pin numbers were taken from the Ta; PROG and BAT types are judgment calls: PROG is a resistor-set/monitor pin (passive), and BAT is the ",
          "exposed pad 9 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 16,
        "cost_usd": 0.0872,
        "at": "2026-10-17T19:00:27"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756400426168672256",
        "pages": 16,
        "sha256": "2091f3fed91bac84",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 9,
        "described": 9,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "f1718a42c5ea007e8e2dd672ac39a1bb358ee4849bd53c42e21ce83e0e5df7a9",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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    "specs": {
      "Manufacturer": "Legend Si",
      "Package": "ESOP-8",
      "Category": "Power Management (PMIC)",
      "Pins": "9"
    },
    "appearance": {
      "contacts": {
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        "doc": "ds.pdf",
        "material": "copper"
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      "version": 1,
      "datasheet_sha256": "2091f3fed91bac840592ff0a96817a3be18fd06ebe567c344b4b02545776d0b7"
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    "characteristics": {
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      "source": "datasheet",
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        {
          "name": "Pin to GND Voltage (VCC, CHRG, DONE, CE)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
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          "conditions": "",
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        },
        {
          "name": "Storage temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
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        },
        {
          "name": "Operating temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
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        {
          "name": "ESD Rated Value (HBM)",
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        {
          "name": "ESD Rated Value (CDM)",
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          "min": -1000,
          "typ": null,
          "max": 1000,
          "conditions": "",
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        },
        {
          "name": "Input Voltage Range",
          "symbol": "",
          "kind": "recommended_operating",
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          "min": 4,
          "typ": null,
          "max": 24,
          "conditions": "surge voltage up to 28V",
          "source_page": 1,
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        },
        {
          "name": "Junction Temperature Range",
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          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
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        {
          "name": "VCC Operation Voltage",
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          "unit": "V",
          "min": null,
          "typ": 5,
          "max": null,
          "conditions": "",
          "source_page": 4,
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        },
        {
          "name": "Trickle charge (TC) threshold voltage",
          "symbol": "VTC",
          "kind": "electrical",
          "unit": "V",
          "min": 2.65,
          "typ": 2.9,
          "max": 3.15,
          "conditions": "Less than this threshold",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Short circuit charging (SC) current (percent of ICC)",
          "symbol": "ISHORT",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 5,
          "max": 7,
          "conditions": "VBAT<VSHORT",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Trickle charging (TC) current (percent of ICC)",
          "symbol": "ITC",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 10,
          "max": 14,
          "conditions": "VSHORT<VBAT<VPRE",
          "source_page": 4,
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        {
          "name": "VCC Threshold Voltage (rising)",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 4,
          "max": null,
          "conditions": "VBAT=3V, EN=1",
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          "source": "datasheet"
        },
        {
          "name": "VCC Threshold Voltage (falling)",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 3.9,
          "max": null,
          "conditions": "VBAT=3V, EN=1",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input Overvoltage Protection",
          "symbol": "VOVP",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 6.5,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VCC Quiescent Current",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 150,
          "max": null,
          "conditions": "VCC=5V, EN=1, BAT Suspended",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VCC Current (shutdown)",
          "symbol": "",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 40,
          "max": null,
          "conditions": "VCC=5V, EN=0, BAT Suspended",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "BAT current",
          "symbol": "",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 1,
          "max": null,
          "conditions": "VCC=0V, VBAT=4.0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Short circuit charging (SC) threshold voltage",
          "symbol": "VSHORT",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.6,
          "max": null,
          "conditions": "Less than this threshold",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Short circuit charging (SC) hysteresis voltage",
          "symbol": "VSHORT_HYS",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.1,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Trickle charging (TC) hysteresis voltage",
          "symbol": "VTC_HYS",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.5,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Constant current charging (CC) current",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1000,
          "max": null,
          "conditions": "VBAT=3.7V, RPROG=1K",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Constant current charging (CC) current",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 800,
          "max": null,
          "conditions": "VBAT=3.7V, RPROG=1.2K",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Constant current charging (CC) current",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 500,
          "max": null,
          "conditions": "VBAT=3.7V, RPROG=2K",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Constant current charging (CC) current",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 100,
          "max": null,
          "conditions": "VBAT=3.7V, RPROG=9K",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Recharging threshold after full battery",
          "symbol": "VRECHRG",
          "kind": "electrical",
          "unit": "% VCV",
          "min": null,
          "typ": 95.7,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "PMOS RDS(ON)",
          "symbol": "RDS(ON)",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 1200,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "CE high level input voltage",
          "symbol": "VCE",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.37,
          "max": null,
          "conditions": "CE Rising",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "CE low level input voltage",
          "symbol": "VCE",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.16,
          "max": null,
          "conditions": "CE Falling",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Battery overheat NTC threshold (high)",
          "symbol": "VTEMP-H",
          "kind": "electrical",
          "unit": "% VCC",
          "min": null,
          "typ": 80,
          "max": null,
          "conditions": "Greater than this threshold, turn off charging",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Battery overheat NTC threshold (low)",
          "symbol": "VTEMP-L",
          "kind": "electrical",
          "unit": "% VCC",
          "min": null,
          "typ": 45,
          "max": null,
          "conditions": "Less than this threshold, turn off charging",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Over temperature protection",
          "symbol": "TOTP",
          "kind": "electrical",
          "unit": "℃",
          "min": null,
          "typ": 150,
          "max": null,
          "conditions": "TJ",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "LED drive current (CHRG)",
          "symbol": "ICHRG",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 5,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "LED drive current (DONE)",
          "symbol": "IDONE",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 5,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
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