UC3844BD1013TR

{
  "schema_version": 1,
  "type": "component",
  "slug": "uc3844bd1013tr",
  "title": "UC3844BD1013TR",
  "brief": "STMicroelectronics DC-DC Converters, SOIC-8. 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",
    "uc3844bd1013tr"
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  "component": {
    "mpn": "UC3844BD1013TR",
    "manufacturer": "STMicroelectronics",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/1a1bd2e5382f4d2aa706c04b7a974627.pdf",
    "parts": {
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      "model_3d_plain": "uc3844bd1013tr.glb",
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      "lbr": "uc3844bd1013tr.lbr"
    },
    "distributor_links": {
      "lcsc": "C10640"
    },
    "pins": [
      {
        "number": "1",
        "name": "COMP",
        "type": "output",
        "description": "Error Amplifier output, made available for loop compensation. Typical output swing 0.8V (low) to 6.2V (high) with a 15k load to ground; capable of ~1mA source and up to 12mA sink."
      },
      {
        "number": "2",
        "name": "VFB",
        "type": "input",
        "description": "Inverting input of the Error Amplifier. Normally connected to the switching power supply output through a resistor divider; internal reference at 2.5V. Input bias current typically -0.1uA."
      },
      {
        "number": "3",
        "name": "ISENSE",
        "type": "input",
        "description": "Current sense input. A voltage proportional to inductor current is applied to this pin; the PWM comparator terminates output switch conduction when this voltage reaches ~1V. Peak current is set by Is_max = 1.0V / Rs."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "passive",
        "description": "Oscillator timing pin. Frequency and maximum duty cycle are programmed by connecting timing resistor RT to VREF and timing capacitor CT to ground. Operation up to 500kHz is possible."
      },
      {
        "number": "5",
        "name": "GROUND",
        "type": "power_in",
        "description": "Combined control circuitry and power ground return. All voltages are referenced to this pin."
      },
      {
        "number": "6",
        "name": "OUTPUT",
        "type": "output",
        "description": "Totem-pole gate-drive output for the external power MOSFET. Peak sourcing and sinking currents up to 1A; low in the off-state and during UVLO. Typical rise/fall time 50ns into 1nF load."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply of the control IC (Vi). UVLO turn-on at 16V typ, turn-off at 10V typ (UC3844B). Absolute max 30V (self-limiting Zener at ~36V). Start-up current <0.5mA; operating current ~12mA typ."
      },
      {
        "number": "8",
        "name": "VREF",
        "type": "power_out",
        "description": "Internally trimmed 5.0V reference output (4.90 to 5.10V). Provides charging current for CT through RT; capable of supplying up to 50mA to external circuitry. Short-circuit current typically -100mA."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/1a1bd2e5382f4d2aa706c04b7a974627.pdf",
        "pages": 15,
        "sha256": "fc57b1768120cd82",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -1.905
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-8_3.9x4.9mm_P1.27mm@sha256:074ecb2092b24fa4",
      "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": [
          6,
          4.9,
          1.75
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "uc3844bd1013tr-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,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "639592e838d7bbc7cc86566c52fe177fb548297fc5cb34057de7673eee00a95b",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "SOIC-8",
      "Category": "PMIC",
      "Pins": "8"
    }
  },
  "sections": [
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    "viewers",
    "readme",
    "breadcrumbs",
    "info"
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  "discovery_triggers": [
    "uc3844bd1013tr"
  ],
  "discovery_pitch": "UC3844BD1013TR (STMicroelectronics) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "uc3844bd1013tr.step",
    "uc3844bd1013tr-etched.step",
    "uc3844bd1013tr.lbr",
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    "docs/uc3844bd1013tr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
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  "visibility": {
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  },
  "variants": [
    {
      "mpn": "UC3844BD1013TR",
      "kind": "packaging"
    },
    {
      "mpn": "UC3844BD1013TRBN",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T13:31:56.929Z"
}