FM4057S52

{
  "schema_version": 1,
  "type": "component",
  "slug": "fm4057s52",
  "title": "FM4057S52",
  "brief": "Shenzhen Fuman Battery Management, SOT-23-5. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "fm4057s52"
  ],
  "component": {
    "mpn": "FM4057S52",
    "manufacturer": "Shenzhen Fuman",
    "package": "SOT-23-5",
    "pin_count": 5,
    "category": "PMIC",
    "subcategory": "Battery Management",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/04a05299c1f84746150fc6c519232486.pdf",
    "parts": {
      "symbol": "fm4057s52.kicad_sym",
      "footprint": "fm4057s52.kicad_mod",
      "model_3d": "fm4057s52-etched.glb",
      "model_3d_plain": "fm4057s52.glb",
      "model_3d_step": "fm4057s52-etched.step",
      "model_3d_step_plain": "fm4057s52.step",
      "lbr": "fm4057s52.lbr"
    },
    "distributor_links": {
      "lcsc": "C841288"
    },
    "pins": [
      {
        "number": "1",
        "name": "CHRG",
        "type": "output",
        "description": "Open-drain charge status indicator. Drives an external LED (to VIN through a series resistor): pulled low (LED on) while charging, high-impedance (LED off) when charge terminates."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground / analog return. Connect directly to the system ground plane."
      },
      {
        "number": "3",
        "name": "BAT",
        "type": "power_out",
        "description": "Battery connection and charger output. Sources the constant-current / constant-voltage charge current to the single-cell Li-ion pack. Regulated to 4.2V (S52), with battery-OVP at ~104% of VBAT_FULL and recharge threshold ~4.05V. Bypass with a 10µF ceramic capacitor to GND."
      },
      {
        "number": "4",
        "name": "VIN",
        "type": "power_in",
        "description": "Charger power input. Recommended 4.2-6.5V operating range, absolute-max 32V (the part's headline 32V input tolerance). VIN UVLO rising ~4.6V / falling ~4.2V; VIN OVP ~6.5V. A 1µF ceramic bypass to GND is recommended (may be omitted per app circuit)."
      },
      {
        "number": "5",
        "name": "ISET",
        "type": "input",
        "description": "Charge-current programming pin. A resistor from ISET to GND sets the constant-current charge level: RISET ≈ 3kΩ → 1.0A, 5kΩ → 0.6A, 6kΩ → 0.5A. Precharge current is ~60mA and termination current is ~60mA at RISET=5kΩ."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/04a05299c1f84746150fc6c519232486.pdf",
        "pages": 14,
        "sha256": "bfc23830eabbc3b5",
        "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -1.1375,
        -0.95
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOT-23-5@sha256:455a3f7c3e5eb5b8",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "fm4057s52.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,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "720a6eab0024069bbee68e7cb4c3ff1149468a34611225cdc852662c5d0ec2b7",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "fm4057s52-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "25077911e41f09283bc833c4ad13d87136e541d53ae69bb165ae0b061ef3c562",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Shenzhen Fuman",
      "Package": "SOT-23-5",
      "Category": "PMIC",
      "Pins": "5"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "fm4057s52"
  ],
  "discovery_pitch": "FM4057S52 (Shenzhen Fuman) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "fm4057s52.kicad_sym",
    "fm4057s52.kicad_mod",
    "fm4057s52.glb",
    "fm4057s52.step",
    "fm4057s52-etched.step",
    "fm4057s52.lbr",
    "docs/hero.png",
    "docs/fm4057s52-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "FM4057S52",
      "kind": "packaging"
    },
    {
      "mpn": "FM4057S52BS52",
      "kind": "packaging"
    },
    {
      "mpn": "FM4057S52S53",
      "kind": "packaging"
    },
    {
      "mpn": "FM4057S52S54",
      "kind": "packaging"
    },
    {
      "mpn": "FM4057S52S42",
      "kind": "packaging"
    },
    {
      "mpn": "FM4057S52S43",
      "kind": "packaging"
    },
    {
      "mpn": "FM4057S52S44",
      "kind": "packaging"
    },
    {
      "mpn": "FM4057S52E42",
      "kind": "packaging"
    },
    {
      "mpn": "FM4057S52BE42",
      "kind": "packaging"
    },
    {
      "mpn": "FM4057S52E43",
      "kind": "packaging"
    },
    {
      "mpn": "FM4057S52E44",
      "kind": "packaging"
    },
    {
      "mpn": "FM4057S52D42",
      "kind": "packaging"
    },
    {
      "mpn": "FM4057S52D43",
      "kind": "packaging"
    },
    {
      "mpn": "FM4057S52D44",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-24T20:42:17.579Z"
}