MCP73831

{
  "schema_version": 1,
  "type": "component",
  "slug": "mcp73831",
  "title": "MCP73831",
  "brief": "Microchip single-cell LiPo linear charger, SOT-23-5. 4.20 V, programmable current, integrated pass FET. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "battery-charger",
    "lipo",
    "li-ion",
    "power-management",
    "sot-23-5",
    "microchip"
  ],
  "component": {
    "mpn": "MCP73831",
    "manufacturer": "Microchip Technology",
    "package": "SOT-23-5",
    "pin_count": 5,
    "category": "Power Management",
    "subcategory": "Li-Ion / LiPo battery charger",
    "datasheet": "https://ww1.microchip.com/downloads/en/DeviceDoc/MCP73831-Family-Data-Sheet-DS20001984H.pdf",
    "parts": {
      "symbol": "mcp73831.kicad_sym",
      "footprint": "mcp73831.kicad_mod",
      "model_3d": "mcp73831-etched.glb",
      "model_3d_plain": "mcp73831.glb",
      "lbr": "mcp73831.lbr",
      "model_3d_step": "mcp73831-etched.step",
      "model_3d_step_plain": "mcp73831.step"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "STAT",
        "type": "tri_state",
        "description": "Charge Status Output. Tri-state logic output on the MCP73831 (open-drain on MCP73832). Drives an indicator LED directly (ISINK up to 25 mA, VOL ≈ 0.4 V at 4 mA; ISOURCE up to 35 mA, VOH ≥ VDD-1 at 4 mA) or can be pulled up for interfacing to a host microcontroller."
      },
      {
        "number": "2",
        "name": "VSS",
        "type": "power_in",
        "description": "Battery Management 0 V Reference. Connect to the negative terminal of the battery and the input supply return."
      },
      {
        "number": "3",
        "name": "VBAT",
        "type": "power_out",
        "description": "Battery Charge Control Output. Connect to the positive terminal of the single-cell Li-Ion/Li-Polymer battery; this is the drain of the internal P-channel MOSFET pass transistor (RDSON ≈ 350 mΩ). Bypass to VSS with a minimum of 4.7 µF to ensure loop stability when the battery is disconnected. Regulated to VREG (4.20/4.35/4.40/4.50 V option) at ±0.75%."
      },
      {
        "number": "4",
        "name": "VDD",
        "type": "power_in",
        "description": "Battery Management Input Supply. Recommended range [VREG(typical) + 0.3 V] to 6 V (absolute max 7 V). Bypass to VSS with a minimum of 4.7 µF. Supply current is 510 µA typical while charging."
      },
      {
        "number": "5",
        "name": "PROG",
        "type": "input",
        "description": "Current Regulation Set and Charge Control Enable. A resistor from PROG to VSS programs the preconditioning, fast-charge, and termination currents (RPROG range 2 kΩ to 67 kΩ; e.g., 2 kΩ → 505 mA, 10 kΩ → 100 mA, 67 kΩ → 14.5 mA typical). Allowing PROG to float (impedance ≥ 70 kΩ, minimum shutdown impedance) disables the charge management controller."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://ww1.microchip.com/downloads/en/DeviceDoc/MCP73831-Family-Data-Sheet-DS20001984H.pdf",
        "pages": 29,
        "sha256": "75297f2a52355993",
        "source_tier": "mfr"
      },
      "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"
    },
    "models_3d": [
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        "file": "mcp73831.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "720a6eab0024069bbee68e7cb4c3ff1149468a34611225cdc852662c5d0ec2b7",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mcp73831-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "7f83bb2d38002daf80c0199ca6c4ff4d28fcd5a6eb9339a5f02286b69aac9374",
        "checked": "2026-10-26",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "Single-cell Li-Ion/LiPo linear charger",
      "Regulation voltage": "4.20 V (-2 variant)",
      "Charge current": "Programmable via PROG (15-500 mA)",
      "Integrated": "Pass transistor, current sense, reverse-discharge protection",
      "Status": "STAT open-drain (charge LED)",
      "Preconditioning + termination": "Automatic",
      "Package": "SOT-23-5",
      "Body (L×W×H)": "2.9 × 1.6 × 1.1 mm"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "mcp73831",
    "lipo charger ic",
    "li-ion battery charger",
    "single cell charger sot-23"
  ],
  "discovery_pitch": "MCP73831 single-cell Li-Ion/LiPo linear battery charger (SOT-23-5) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "mcp73831.kicad_mod",
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    "mcp73831.lbr",
    "docs/hero.png",
    "docs/mcp73831-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mcp73831-etched.step"
  ],
  "variants": [
    {
      "mpn": "MCP73831T-2ACI/OT (SOT-23-5, 4.20 V)",
      "kind": "packaging"
    },
    {
      "mpn": "MCP73831-2ACI/OT (SOT-23-5)",
      "kind": "packaging"
    }
  ]
}