BL8039CB5TR

{
  "schema_version": 1,
  "type": "component",
  "slug": "bl8039cb5tr",
  "title": "BL8039CB5TR",
  "brief": "BL Shanghai Belling DC-DC Converters, 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",
    "bl8039cb5tr"
  ],
  "component": {
    "mpn": "BL8039CB5TR",
    "manufacturer": "BL Shanghai Belling",
    "package": "SOT-23-5",
    "pin_count": 5,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2201121300_BL-Shanghai-Belling-BL8039CB5TR_C2924844.pdf",
    "parts": {
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      "footprint": "bl8039cb5tr.kicad_mod",
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      "model_3d_plain": "bl8039cb5tr.glb",
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      "lbr": "bl8039cb5tr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2924844"
    },
    "pins": [
      {
        "number": "1",
        "name": "EN",
        "type": "input",
        "description": "Enable input. Drive high (VIH >= 1.2V) to enable the converter; drive low (VIL <= 0.5V) to place the part in shutdown (IQ < 1uA). Do not leave floating."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground and power return for the internal low-side synchronous NMOS. Tie to the ground plane with a short, wide, low-inductance path."
      },
      {
        "number": "3",
        "name": "SW",
        "type": "output",
        "description": "Switch node. Connects to the drains of the internal high-side PMOS and low-side NMOS. Connect the external power inductor (typ. 1uH-2.2uH) between SW and the regulated output. Keep trace short and wide to minimize EMI."
      },
      {
        "number": "4",
        "name": "VIN",
        "type": "power_in",
        "description": "Supply input, 2.6V to 5.5V (8V abs max, 6.1V OVP threshold). Bypass with a low-ESR ceramic capacitor (typ. 10uF) placed as close as possible to the pin."
      },
      {
        "number": "5",
        "name": "FB",
        "type": "input",
        "description": "Feedback input to the error amplifier, regulated to VREF = 0.6V (+/-2%). Connect an external resistor divider from VOUT to FB and GND to set output between 0.6V and VIN: R_TOP = R_BOTTOM * (VOUT/0.6 - 1). Feedback leakage 0.1uA typ."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2201121300_BL-Shanghai-Belling-BL8039CB5TR_C2924844.pdf",
        "pages": 7,
        "sha256": "ae8ae21196a5c32f",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 5,
        "described": 5,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
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    "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": "bl8039cb5tr.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": "bl8039cb5tr-etched.step",
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        "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": "d78b6a571fe0200cf36e9effb6027303b03be563c3d0e714e0f23fd119edd74d",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "BL Shanghai Belling",
      "Package": "SOT-23-5",
      "Category": "PMIC",
      "Pins": "5"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "ae8ae21196a5c32f",
      "rows": [
        {
          "name": "Input voltage range",
          "symbol": "VIN",
          "kind": "electrical",
          "unit": "V",
          "min": 2.6,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Feedback voltage",
          "symbol": "VREF",
          "kind": "tolerance",
          "unit": "V",
          "min": 0.588,
          "typ": 0.6,
          "max": 0.612,
          "conditions": "Vin=5V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Switching frequency",
          "symbol": "FSOC",
          "kind": "electrical",
          "unit": "MHz",
          "min": 1.6,
          "typ": 2,
          "max": 2.4,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Under voltage lockout",
          "symbol": "VUVLO",
          "kind": "electrical",
          "unit": "V",
          "min": 1.9,
          "typ": 2.1,
          "max": 2.3,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Peak current limit",
          "symbol": "ILIMIT",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 2.7,
          "max": 3.3,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Max input voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 8,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Max operating junction temperature (TJ)",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Ambient temperature (TA)",
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          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum power dissipation, SOT23-5",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 400,
          "conditions": "SOT23-5",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature (TS)",
          "symbol": "TS",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
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        {
          "name": "Lead temperature & time",
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          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "10S",
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        },
        {
          "name": "ESD (HBM)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": 2000,
          "typ": null,
          "max": null,
          "conditions": "HBM",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Package thermal resistance (JA)",
          "symbol": "JA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 200,
          "max": null,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_triggers": [
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  "discovery_pitch": "BL8039CB5TR (BL Shanghai Belling) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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  "updated_at": "2026-09-24T17:52:28.589Z"
}