TC6291C

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  "type": "component",
  "slug": "tc6291c",
  "title": "TC6291C",
  "brief": "Shenzhen Fuman DC-DC Converters, SOT-23-6. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "pmic",
    "tc6291c"
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  "component": {
    "mpn": "TC6291C",
    "manufacturer": "Shenzhen Fuman",
    "package": "SOT-23-6",
    "pin_count": 6,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/e7e4e16bb786b098ae69498505925499.pdf",
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    "distributor_links": {
      "lcsc": "C108641"
    },
    "pins": [
      {
        "number": "1",
        "name": "LX",
        "type": "output",
        "description": "Switching node - drain of the internal 0.2Ω, 2A, 16V N-channel power MOSFET. Connects to the boost inductor and Schottky rectifier cathode. Absolute max voltage 16V."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "IC ground return for the internal MOSFET source, control logic and current-sense amplifier. Should tie directly to the ground plane close to CIN/COUT."
      },
      {
        "number": "3",
        "name": "FB",
        "type": "input",
        "description": "Inverting input of the error amplifier. Connect to the mid-point of the output resistor divider; regulation target Vref = 0.6V (±2%). VOUT = 0.6V × (1 + R1/R2). Absolute max 6V."
      },
      {
        "number": "4",
        "name": "EN",
        "type": "input",
        "description": "Enable input, active high. VEN ≥ 0.96V turns the converter on; VEN ≤ 0.6V shuts it down (IQ ≈ 0.1µA). Absolute max 6V."
      },
      {
        "number": "5",
        "name": "VCC",
        "type": "power_in",
        "description": "IC supply input. Operating range 2.6V to 5.5V, UVLO ≈ 2.2V (0.1V hysteresis). Absolute max 6V. Decouple close to the pin with low-ESR ceramic."
      },
      {
        "number": "6",
        "name": "OC",
        "type": "input",
        "description": "Adjustable peak-current-limit programming pin. A resistor from OC to GND (36kΩ-100kΩ) sets the peak switch current from ~1.5A down to 0.5A per IOCP = 55000/R. Leaving OC floating gives the default (~2A typ, 2.6A max) internal limit. Do not add capacitance on this pin."
      }
    ],
    "provenance": {
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        "pages": 10,
        "sha256": "bc0dc73401217660",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 6,
        "described": 6,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
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    "viewers": {
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    "pin1": {
      "pad": "1",
      "at": [
        -1.1375,
        -0.95
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOT-23-6@sha256:f341c73aac9dcb55",
      "mark": "drawn"
    },
    "models_3d": [
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        "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": "c9fe686b4d1b56927a41fa84a9bc1efb61d8a45a123a3db43bcaa05c2891d635",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Shenzhen Fuman",
      "Package": "SOT-23-6",
      "Category": "PMIC",
      "Pins": "6"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "bc0dc73401217660",
      "rows": [
        {
          "name": "Supply voltage (absolute maximum)",
          "symbol": "Vcc",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 2,
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        },
        {
          "name": "LX voltage (absolute maximum)",
          "symbol": "Vlx",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 16,
          "conditions": "",
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        },
        {
          "name": "EN, FB voltage (absolute maximum)",
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          "min": 0,
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        },
        {
          "name": "Operating temperature",
          "symbol": "Top",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
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        {
          "name": "Storage temperature",
          "symbol": "Tst",
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          "unit": "℃",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
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        },
        {
          "name": "Input voltage range",
          "symbol": "Vcc",
          "kind": "electrical",
          "unit": "V",
          "min": 2.6,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 6,
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        },
        {
          "name": "Oscillator frequency",
          "symbol": "Fosc",
          "kind": "electrical",
          "unit": "MHz",
          "min": 0.8,
          "typ": 1,
          "max": 1.2,
          "conditions": "Vfb=1.0V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Reference voltage",
          "symbol": "Vref",
          "kind": "electrical",
          "unit": "V",
          "min": 0.588,
          "typ": 0.6,
          "max": 0.612,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Open-circuit current limit",
          "symbol": "Locp",
          "kind": "electrical",
          "unit": "A",
          "min": 2,
          "typ": null,
          "max": 2.6,
          "conditions": "",
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        {
          "name": "Adjustable open-circuit current limit",
          "symbol": "Locp",
          "kind": "electrical",
          "unit": "A",
          "min": 0.5,
          "typ": null,
          "max": 1.5,
          "conditions": "External resistor 36K~100K",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Junction temperature",
          "symbol": "Tj",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
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        },
        {
          "name": "Power dissipation",
          "symbol": "Pd",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 455,
          "conditions": "SOT23-6 @ Ta=25℃",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance, junction to ambient",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "℃/W",
          "min": null,
          "typ": null,
          "max": 220,
          "conditions": "SOT23-6",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Lead soldering temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Soldering, 10 s",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "UVLO threshold",
          "symbol": "Vuvlo",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 2.2,
          "max": null,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "UVLO hysteresis (low-voltage shutdown)",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.1,
          "max": null,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current",
          "symbol": "Icc",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.17,
          "max": null,
          "conditions": "VFB=0.66V, no switching",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Supply current with switching",
          "symbol": "Icc",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1.9,
          "max": null,
          "conditions": "VFB=0.55V, with switching",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Shutdown current",
          "symbol": "Icc",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": 0.1,
          "max": null,
          "conditions": "Ven=GND",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Frequency variation with voltage",
          "symbol": "∆f/∆v",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 5,
          "max": null,
          "conditions": "Vcc=2.6V~5.5V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Maximum duty cycle",
          "symbol": "Tduty",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 90,
          "max": null,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Reference voltage line regulation",
          "symbol": "",
          "kind": "electrical",
          "unit": "%/V",
          "min": null,
          "typ": 0.05,
          "max": null,
          "conditions": "Vcc=2.6V~5.5V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Enable voltage",
          "symbol": "Ven",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.96,
          "max": null,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Disable voltage",
          "symbol": "Ven",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.6,
          "max": null,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "MOSFET on-resistance",
          "symbol": "Rds(on)",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.2,
          "max": null,
          "conditions": "Llx=2A",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Overtemperature protection threshold",
          "symbol": "Totp",
          "kind": "electrical",
          "unit": "℃",
          "min": null,
          "typ": 150,
          "max": null,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        }
      ]
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  "discovery_pitch": "TC6291C (Shenzhen Fuman) component page with datasheet-verified CAD.",
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  "updated_at": "2026-09-25T09:22:24.978Z"
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