IP5209T

{
  "schema_version": 1,
  "type": "component",
  "slug": "ip5209t",
  "title": "IP5209T",
  "brief": "INJOINIC Battery Management, QFN-24-EP(4x4). Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "ip5209t"
  ],
  "component": {
    "mpn": "IP5209T",
    "manufacturer": "INJOINIC",
    "package": "QFN-24-EP(4x4)",
    "pin_count": 25,
    "category": "PMIC",
    "subcategory": "Battery Management",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/c1da174a87a1c479790560c2a13806de.pdf",
    "parts": {
      "symbol": "ip5209t.kicad_sym",
      "footprint": "ip5209t.kicad_mod",
      "model_3d": "ip5209t-etched.glb",
      "model_3d_plain": "ip5209t.glb",
      "model_3d_step": "ip5209t-etched.step",
      "model_3d_step_plain": "ip5209t.step",
      "lbr": "ip5209t.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "L2/SDA",
        "type": "bidirectional",
        "description": "Battery-level LED driver pin L2; also acts as the I2C SDA data line when I2C function is enabled."
      },
      {
        "number": "2",
        "name": "L3",
        "type": "output",
        "description": "Battery-level indicator LED driver pin L3. Drives the 3rd LED in multi-LED fuel-gauge display modes."
      },
      {
        "number": "3",
        "name": "VREG",
        "type": "power_out",
        "description": "Internal 3.1V LDO regulator output. Sourcing capability ~5 mA; no output in sleep state. Used as internal supply and reference; also selects VTHS high-platform battery voltage when tied to VTHS."
      },
      {
        "number": "4",
        "name": "VTHS",
        "type": "input",
        "description": "Battery platform-select input. Tie to VREG for high-platform 3.7V battery; tie to GND for low-platform 3.6V battery."
      },
      {
        "number": "5",
        "name": "RSET",
        "type": "input",
        "description": "Battery internal-resistance compensation setting via external resistor to GND. Tunes fuel-gauge curve (e.g. 10K=45mΩ, 43K=67.5mΩ, 120K=112.5mΩ, 200K=90mΩ, NC=22.5mΩ)."
      },
      {
        "number": "6",
        "name": "NTC",
        "type": "input",
        "description": "Battery temperature sense input for external NTC thermistor. Sources 20 µA; thresholds VH=0.43V (>55°C), VM=0.58V (>45°C, half charge current), VL=1.44V (<-10°C, stop charge/discharge). Tie to GND if unused."
      },
      {
        "number": "7",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground reference for the control/analog blocks."
      },
      {
        "number": "8",
        "name": "KEY",
        "type": "input",
        "description": "Push-button input to GND. Short press (60ms-2s) enables battery-display LED and 5V boost output; long press (>2s) toggles flashlight LED; double-tap within 1s turns off boost, LED display and flashlight."
      },
      {
        "number": "9",
        "name": "VBAT",
        "type": "power_in",
        "description": "Boost converter input; connect to Li-ion battery positive terminal. Operating range 3.0-4.4V."
      },
      {
        "number": "10",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect. Leave floating."
      },
      {
        "number": "11",
        "name": "ICHG",
        "type": "input",
        "description": "Charge current program pin. External resistor to GND sets charge current per ICHG = 1.2V/R × 10000 (e.g. 120K=1A, 100K=1.2A, 82K=1.5A, 51K=2.4A, NC=default 1.9A)."
      },
      {
        "number": "12",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground for the switching power stage."
      },
      {
        "number": "13",
        "name": "LX",
        "type": "passive",
        "description": "DCDC switching node. Connect to external boost inductor (typ. 1 µH). Pins 13, 14, 15 are tied together internally."
      },
      {
        "number": "14",
        "name": "LX",
        "type": "passive",
        "description": "DCDC switching node. Connect to external boost inductor (typ. 1 µH). Tied to pins 13, 15."
      },
      {
        "number": "15",
        "name": "LX",
        "type": "passive",
        "description": "DCDC switching node. Connect to external boost inductor (typ. 1 µH). Tied to pins 13, 14."
      },
      {
        "number": "16",
        "name": "VOUT",
        "type": "power_out",
        "description": "5V boost regulated output (2.4A max). Delivers USB-out supply. Pins 16, 17 tied together internally."
      },
      {
        "number": "17",
        "name": "VOUT",
        "type": "power_out",
        "description": "5V boost regulated output (2.4A max). Tied to pin 16."
      },
      {
        "number": "18",
        "name": "DM",
        "type": "bidirectional",
        "description": "USB D− line for DCP handshake / attached-device detection. Supports Apple, Samsung and BC1.2 DCP D+/D− voltage patterns for max charging current."
      },
      {
        "number": "19",
        "name": "DP",
        "type": "bidirectional",
        "description": "USB D+ line for DCP handshake / attached-device detection. Works with DM to advertise BC1.2 / Apple / Samsung DCP profiles."
      },
      {
        "number": "20",
        "name": "VIN",
        "type": "power_in",
        "description": "DC 5V charge input (from USB Micro-B / Type-A adapter). Operating range 4.75-5.5V; UVLO 4.5V rising, 200 mV hysteresis. Pins 20, 21 tied together internally."
      },
      {
        "number": "21",
        "name": "VIN",
        "type": "power_in",
        "description": "DC 5V charge input. Tied to pin 20."
      },
      {
        "number": "22",
        "name": "LIGHT",
        "type": "output",
        "description": "Flashlight LED driver output, open-drain, drives external LED up to 100 mA. Toggled by KEY long-press. Tie to GND if flashlight unused so IC auto-disables the feature."
      },
      {
        "number": "23",
        "name": "VSET",
        "type": "input",
        "description": "Battery type/voltage select. Float → 4.2V battery; tie to GND → 4.35V battery; tie to VBAT → 4.4V battery."
      },
      {
        "number": "24",
        "name": "L1/SCK",
        "type": "bidirectional",
        "description": "Battery-level LED driver pin L1; also acts as the I2C SCK clock line when I2C function is enabled."
      },
      {
        "number": "25",
        "name": "GND",
        "type": "power_in",
        "description": "Exposed thermal pad (EPAD). Power ground and heat-sink; must be soldered to PCB ground for proper thermal and electrical operation."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/c1da174a87a1c479790560c2a13806de.pdf",
        "pages": 14,
        "sha256": "5ffc084f061c59e6",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 25,
        "described": 25,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "ip5209t.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "f7d256794c4147daf24dcae0554fae18510315e565ad1e239b475be7fef80d8b",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ip5209t-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "b855951d263bd20523e2d436b82ab0ff887b37afb5ffdced7c34db107696a3d5",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "INJOINIC",
      "Package": "QFN-24-EP(4x4)",
      "Category": "PMIC",
      "Pins": "25"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ip5209t"
  ],
  "discovery_pitch": "IP5209T (INJOINIC) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ip5209t.kicad_sym",
    "ip5209t.kicad_mod",
    "ip5209t.glb",
    "ip5209t.step",
    "ip5209t-etched.step",
    "ip5209t.lbr",
    "docs/hero.png",
    "docs/ip5209t-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "IP5209T",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-24T22:46:42.995Z"
}