BD8303MUV-E2

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  "slug": "bd8303muv-e2",
  "title": "BD8303MUV-E2",
  "brief": "ROHM DC-DC Converters, QFN-16-EP(3x3). Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "pmic",
    "bd8303muv-e2"
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  "component": {
    "mpn": "BD8303MUV-E2",
    "manufacturer": "ROHM",
    "package": "QFN-16-EP(3x3)",
    "pin_count": 16,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/0dcd5e16eb0cd528e47e2e6b89398c89.pdf",
    "parts": {
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      "model_3d_plain": "bd8303muv-e2.glb",
      "model_3d_step": "bd8303muv-e2-etched.step",
      "model_3d_step_plain": "bd8303muv-e2.step",
      "lbr": "bd8303muv-e2.lbr"
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    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "RT",
        "type": "input",
        "description": "Oscillation frequency set terminal. An external resistor R_RT to GND programs the internal oscillator frequency (0.2 to 1.0 MHz operating range; 600 kHz typ at R_RT = 51 kΩ)."
      },
      {
        "number": "2",
        "name": "INV",
        "type": "input",
        "description": "Error amplifier inverting input terminal. Compared against the internal 1.0V reference; sets the DC/DC output regulation point through the external feedback divider."
      },
      {
        "number": "3",
        "name": "FB",
        "type": "output",
        "description": "Error amplifier output terminal. Loop-compensation network is connected between FB and INV. Sources ~20 µA / sinks ~1.3 mA."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Signal/analog ground terminal for the IC."
      },
      {
        "number": "5",
        "name": "STB",
        "type": "input",
        "description": "ON/OFF (standby) control terminal. IC turns ON when STB ≥ 2.5V and OFF when open or 0V. Internal ~400 kΩ pull-down to GND."
      },
      {
        "number": "6",
        "name": "BOOT2",
        "type": "power_in",
        "description": "Output-side (SW2/secondary) high-side gate driver bootstrap supply input. External bootstrap capacitor to SW2 supplies the floating high-side driver. Max 7V vs SW2, 20V vs GND."
      },
      {
        "number": "7",
        "name": "HG2",
        "type": "output",
        "description": "Output-side (secondary) high-side external N-channel FET gate drive terminal. Referenced to SW2. On-resistance ~4Ω typ."
      },
      {
        "number": "8",
        "name": "SW2",
        "type": "passive",
        "description": "Output-side (secondary) switching node / coil connecting terminal. Return reference for the BOOT2/HG2 high-side driver. Max 15V absolute."
      },
      {
        "number": "9",
        "name": "LG2",
        "type": "output",
        "description": "Output-side (secondary) low-side external N-channel FET gate drive terminal, referenced to PGND. Max duty ~90%, min ~10%; ~4Ω on-resistance."
      },
      {
        "number": "10",
        "name": "PGND",
        "type": "power_in",
        "description": "Driver part power-ground terminal. Return for the low-side gate drivers; connect to system ground with a low-impedance path."
      },
      {
        "number": "11",
        "name": "LG1",
        "type": "output",
        "description": "Input-side (primary) low-side external N-channel FET gate drive terminal, referenced to PGND. ~4Ω on-resistance; ~100 ns dead-time vs HG1."
      },
      {
        "number": "12",
        "name": "SW1",
        "type": "passive",
        "description": "Input-side (primary) switching node / coil connecting terminal. Return reference for the BOOT1/HG1 floating high-side driver. Max 15V absolute."
      },
      {
        "number": "13",
        "name": "HG1",
        "type": "output",
        "description": "Input-side (primary) high-side external N-channel FET gate drive terminal, referenced to SW1. Max duty ~90%. ~4Ω on-resistance."
      },
      {
        "number": "14",
        "name": "BOOT1",
        "type": "power_in",
        "description": "Input-side (primary) high-side gate driver bootstrap supply input. External bootstrap capacitor to SW1 develops floating rail for HG1. Max 7V vs SW1, 20V vs GND."
      },
      {
        "number": "15",
        "name": "REG",
        "type": "power_out",
        "description": "5V internal regulator (VREG) output terminal. Supplies internal circuitry and BOOT rail; requires an external 1.0 µF decoupling capacitor. 4.7 to 5.5V, 5.1V typ. Absolute max 7V."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Main power input terminal. Operating range 2.7V to 14V; absolute maximum 15V. Supplies the internal 5V regulator and control circuitry."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/0dcd5e16eb0cd528e47e2e6b89398c89.pdf",
        "pages": 27,
        "sha256": "a09f7b160668292c",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
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        "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",
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        "checked": "2026-10-07",
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "ROHM",
      "Package": "QFN-16-EP(3x3)",
      "Category": "PMIC",
      "Pins": "16"
    }
  },
  "variants": [
    {
      "mpn": "BD8303MUV-E2",
      "kind": "packaging"
    }
  ],
  "sections": [
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  "discovery_triggers": [
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  "discovery_pitch": "BD8303MUV-E2 (ROHM) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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    "path": "docs/hero.png"
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  "updated_at": "2026-09-24T17:42:26.397Z"
}