XT4051K421MR-G

{
  "schema_version": 1,
  "type": "component",
  "slug": "xt4051k421mr-g",
  "title": "XT4051K421MR-G",
  "brief": "NATLINEAR Battery Management ICs, SOT-23-5L. 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 ics",
    "xt4051k421mr-g",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "XT4051K421MR-G",
    "manufacturer": "NATLINEAR",
    "package": "SOT-23-5L",
    "pin_count": 5,
    "category": "Power Management ICs",
    "subcategory": "Battery Management ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/4c0675a3af9ca228ded12792b1aca1d4.pdf",
    "parts": {
      "symbol": "xt4051k421mr-g.kicad_sym",
      "footprint": "xt4051k421mr-g.kicad_mod",
      "model_3d": "xt4051k421mr-g-hero.glb",
      "model_3d_plain": "xt4051k421mr-g-etched.glb",
      "model_3d_step": "xt4051k421mr-g-etched.step",
      "model_3d_step_plain": "xt4051k421mr-g.step",
      "lbr": "xt4051k421mr-g.lbr"
    },
    "distributor_links": {
      "lcsc": "C219049"
    },
    "distributor_check": {
      "checked_at": "2026-10-29T01:26:13Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CHRG",
        "type": "output",
        "description": "Open-drain charge status output that is pulled low by an internal N-channel MOSFET while charging and is high-impedance when charging is complete or during undervoltage lockout; a 1µF capacitor between BAT and GND lets the pin flag a missing battery by fast LED blinking."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "3",
        "name": "BAT",
        "type": "power_out",
        "description": "Charge current output that supplies current to the battery and regulates the float voltage to 4.2V, with an internal precision resistor separating this pin from the auto-shutdown float voltage; with a reversed battery, about 0.7mA flows between GND and BAT while the internal protection limits damage to the ESD diode."
      },
      {
        "number": "4",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive input supply for the charger, specified from 4.25V to 6.5V, which must be bypassed with at least 1µF; if VCC falls to within 100mV of the BAT voltage the device enters standby and BAT current drops below 2µA."
      },
      {
        "number": "5",
        "name": "PROG",
        "type": "bidirectional",
        "description": "Charge current programming, monitoring and shutdown pin, where a 1% resistor to ground sets the charge current via IBAT = (VPROG/RPROG)×200, the pin holds 1V in constant-current mode, reaching 1.21V shuts the charger down, and pulling above the approximately 2.4V pinch-off voltage draws about 1.5mA."
      }
    ],
    "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 page 1 and page 3 top-view diagrams list the pin labels in a different order from the page 2 pin; The MPN suffix decodes to K (trickle charge), 42 (4.2V), 1 (±1%), M (SOT-23-5), R (front orientation"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0318,
        "at": "2026-10-29T01:26:04"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/4c0675a3af9ca228ded12792b1aca1d4.pdf",
        "pages": 11,
        "sha256": "a0f7650ff6f486f8",
        "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"
    },
    "models_3d": [
      {
        "file": "xt4051k421mr-g.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": "2026-10-29",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "xt4051k421mr-g-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": "28b38498b5871ec9ec22b1fbd8a86d754bc990380c81207bc8fcef9a854206f4",
        "checked": "2026-10-29",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "NATLINEAR",
      "Package": "SOT-23-5L",
      "Category": "Power Management ICs",
      "Pins": "5"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "a0f7650ff6f486f802d12f29b9498d0b6815409846275ab20d933ffca56f6f1f",
      "rows": [
        {
          "name": "Input voltage",
          "symbol": "Vcc",
          "kind": "electrical",
          "unit": "V",
          "min": 4.25,
          "typ": null,
          "max": 6.5,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output control voltage (float)",
          "symbol": "Vfloat",
          "kind": "electrical",
          "unit": "V",
          "min": 4.158,
          "typ": 4.2,
          "max": 4.342,
          "conditions": "0℃<TA<85℃, IBAT = 40mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "BAT pin current, current mode",
          "symbol": "Ibat",
          "kind": "electrical",
          "unit": "mA",
          "min": 18,
          "typ": 20,
          "max": 22,
          "conditions": "Rprog=10k, Current mode",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "BAT pin current, current mode",
          "symbol": "Ibat",
          "kind": "electrical",
          "unit": "mA",
          "min": 93,
          "typ": 100,
          "max": 107,
          "conditions": "Rprog=2k, Current mode",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "BAT pin current, standby mode",
          "symbol": "Ibat",
          "kind": "electrical",
          "unit": "µA",
          "min": 0,
          "typ": -2.5,
          "max": -6,
          "conditions": "Standby mode, Vbat=4.2V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Trickle charge current",
          "symbol": "Itrikl",
          "kind": "electrical",
          "unit": "mA",
          "min": 18,
          "typ": 20,
          "max": 22,
          "conditions": "Vbat<Vtrikl, Rprog=2k",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Trickle charge threshold voltage",
          "symbol": "Vtrikl",
          "kind": "electrical",
          "unit": "V",
          "min": 2.8,
          "typ": 2.9,
          "max": 3,
          "conditions": "Rprog=10K, Vbat Rising",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Trickle charge hysteresis voltage",
          "symbol": "Vtrhys",
          "kind": "electrical",
          "unit": "mV",
          "min": 50,
          "typ": 75,
          "max": 100,
          "conditions": "Rporg=10k (as printed)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Undervoltage lockout threshold voltage",
          "symbol": "Vuv",
          "kind": "electrical",
          "unit": "V",
          "min": 3.7,
          "typ": 3.8,
          "max": 3.93,
          "conditions": "From Vcc low to high",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Undervoltage lockout hysteresis voltage",
          "symbol": "Vuvhys",
          "kind": "electrical",
          "unit": "mV",
          "min": 80,
          "typ": 115,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Manual shutdown threshold voltage (PROG rising)",
          "symbol": "Vmsd",
          "kind": "electrical",
          "unit": "V",
          "min": 1.15,
          "typ": 1.21,
          "max": 1.3,
          "conditions": "PROG pin rising",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Manual shutdown threshold voltage (PROG falling)",
          "symbol": "Vmsd",
          "kind": "electrical",
          "unit": "V",
          "min": 0.9,
          "typ": 1,
          "max": 1.1,
          "conditions": "PROG pin falling",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Vcc-Vbat stop-working threshold voltage (low to high)",
          "symbol": "Vasd",
          "kind": "electrical",
          "unit": "mV",
          "min": 140,
          "typ": 220,
          "max": 300,
          "conditions": "Vcc from low to high",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Vcc-Vbat stop-working threshold voltage (high to low)",
          "symbol": "Vasd",
          "kind": "electrical",
          "unit": "mV",
          "min": 80,
          "typ": 120,
          "max": 160,
          "conditions": "Vcc from high to low",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "C/10 termination threshold current",
          "symbol": "Iterm",
          "kind": "electrical",
          "unit": "mA/mA",
          "min": 0.255,
          "typ": 0.3,
          "max": 0.345,
          "conditions": "Rprog=10k",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "PROG pin voltage",
          "symbol": "Vprog",
          "kind": "electrical",
          "unit": "V",
          "min": 0.93,
          "typ": 1,
          "max": 1.07,
          "conditions": "Rprog=10k, Current mode",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "CHRG weak pull-down current",
          "symbol": "Ichrg",
          "kind": "electrical",
          "unit": "µA",
          "min": 8,
          "typ": 20,
          "max": 35,
          "conditions": "Vchrg=5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input voltage (absolute maximum, Vcc)",
          "symbol": "Vcc",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 7,
          "conditions": "Printed as VSS-0.3 to VSS+7 V (min relative to VSS)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "PROG pin voltage (absolute maximum)",
          "symbol": "Vprog",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "Printed as VSS-0.3 to Vcc+0.3 V; max not a fixed number",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "BAT pin voltage (absolute maximum)",
          "symbol": "Vbat",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 7,
          "conditions": "Printed as Vss-0.3 to 7 V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "CHRG pin voltage (absolute maximum)",
          "symbol": "Vchrg",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 10,
          "conditions": "Printed as VSS-0.3 to VSS+10 V (min relative to VSS)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Power dissipation",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 250,
          "conditions": "SOT-23-5L package",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "BAT pin current",
          "symbol": "Ibat",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 200,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "PROG pin current",
          "symbol": "Iprog",
          "kind": "absolute_maximum",
          "unit": "uA",
          "min": null,
          "typ": null,
          "max": 800,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "ESD capability, human body model",
          "symbol": "VESD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 7000,
          "conditions": "Human body model",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating ambient temperature",
          "symbol": "Topa",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "Tstr",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "xt4051k421mr-g"
  ],
  "discovery_pitch": "XT4051K421MR-G (NATLINEAR) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "xt4051k421mr-g.kicad_sym",
    "xt4051k421mr-g.kicad_mod",
    "xt4051k421mr-g.glb",
    "xt4051k421mr-g.step",
    "xt4051k421mr-g.lbr",
    "docs/hero.png",
    "docs/xt4051k421mr-g-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "xt4051k421mr-g-hero.glb",
    "xt4051k421mr-g-hero.overlay.json",
    "xt4051k421mr-g-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}