SK4054S5-42

{
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  "type": "component",
  "slug": "sk4054s5-42",
  "title": "SK4054S5-42",
  "brief": "Suntek Battery Management, SOT-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",
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    "power management (pmic)",
    "sk4054s5-42",
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  "component": {
    "mpn": "SK4054S5-42",
    "manufacturer": "Suntek",
    "package": "SOT-23-5",
    "pin_count": 5,
    "category": "Power Management (PMIC)",
    "subcategory": "Battery Management",
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      "lbr": "sk4054s5-42.lbr"
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    "distributor_links": {
      "lcsc": "C2986186"
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      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
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      "mouser": {
        "pn": null,
        "status": "no match"
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    },
    "pins": [
      {
        "number": "1",
        "name": "CHRG",
        "type": "output",
        "description": "Open-drain charge status output that uses a strong pull-down (~10mA) during a charge cycle, a weak ~20µA pull-down after termination, and goes high-impedance in undervoltage lockout."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the charger."
      },
      {
        "number": "3",
        "name": "BAT",
        "type": "power_out",
        "description": "Charge current output to the battery, delivering up to 500mA in constant-current mode and regulating to a 4.2V float voltage."
      },
      {
        "number": "4",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive input supply; operating range 4.25V to 6.5V, with absolute maximum input voltage of 10V and undervoltage lockout threshold of about 3.8V."
      },
      {
        "number": "5",
        "name": "PROG",
        "type": "bidirectional",
        "description": "Charge current program, monitor and shutdown pin: a 1% resistor to ground sets the charge current (1000 times the PROG current), PROG voltage is 1.0V at 10k in current mode, and floating the pin enters shutdown."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
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        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin numbers, names and functions are from the datasheet pin description table (page 2) for SOT23-5, "
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        "cost_usd": 0.0586,
        "at": "2026-10-19T07:45:42"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
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        "described": 5,
        "cites_pages": true,
        "refuses_to_fabricate": true
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      "Manufacturer": "Suntek",
      "Package": "SOT-23-5",
      "Category": "Power Management (PMIC)",
      "Pins": "5"
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        {
          "name": "Trickle Hysteresis Charge Voltage",
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          "conditions": "RPROG = 10k",
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          "name": "VCC Undervoltage Lockout Threshold",
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        {
          "name": "VCC Undervoltage Lockout Hysteresis",
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          "name": "Recharge Battery Threshold Voltage",
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          "name": "Power FET ON Resistance (Between VCC and BAT)",
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          "name": "Soft-Start Time",
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          "name": "Junction-to-ambient thermal resistance",
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          "min": null,
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          "max": null,
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          "name": "Junction-to-case (top) thermal resistance",
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          "min": null,
          "typ": 130,
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          "name": "Junction-to-board thermal resistance",
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          "min": null,
          "typ": 45,
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        {
          "name": "Junction-to-top characterization parameter",
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          "name": "Junction-to-board characterization parameter",
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