LM43603AQPWPRQ1

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  "type": "component",
  "slug": "lm43603aqpwprq1",
  "title": "LM43603AQPWPRQ1",
  "brief": "Texas Instruments DC-DC Converters, HTSSOP-16-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "power supply chip",
    "lm43603aqpwprq1",
    "factory-2.0.0",
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  "component": {
    "mpn": "LM43603AQPWPRQ1",
    "manufacturer": "Texas Instruments",
    "package": "HTSSOP-16-EP",
    "pin_count": 17,
    "category": "Power Supply Chip",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm43603-q1",
    "parts": {
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    },
    "distributor_links": {
      "lcsc": 781812,
      "digikey": "296-46970-2-ND",
      "mouser": "595-LM43603AQPWPRQ1"
    },
    "distributor_check": {
      "checked_at": "2026-10-05T23:13:19Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-46970-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-LM43603AQPWPRQ1",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SW",
        "type": "output",
        "description": "Switching output of regulator internally connected to both power MOSFETs; connect to power inductor."
      },
      {
        "number": "2",
        "name": "SW",
        "type": "output",
        "description": "Switching output of regulator internally connected to both power MOSFETs; connect to power inductor."
      },
      {
        "number": "3",
        "name": "CBOOT",
        "type": "passive",
        "description": "Bootstrap capacitor connection for high-side driver; connect 470-nF capacitor from CBOOT to SW."
      },
      {
        "number": "4",
        "name": "VCC",
        "type": "power_out",
        "description": "Internal bias supply output for bypassing; connect bypass capacitor to AGND, do not connect external loading, never short to ground during operation."
      },
      {
        "number": "5",
        "name": "BIAS",
        "type": "power_in",
        "description": "Optional internal LDO supply input with voltage range 3.3V to 28V or VIN; place bypass capacitor 1-10µF to ground when used, tie to ground when not in use, voltage must not exceed VIN."
      },
      {
        "number": "6",
        "name": "SYNC",
        "type": "input",
        "description": "Clock input to synchronize switching action to external clock; use high-speed termination to prevent ringing, connect to ground if not used, do not float."
      },
      {
        "number": "7",
        "name": "RT",
        "type": "input",
        "description": "Connect resistor from this pin to AGND to program switching frequency; leave floating for 500 kHz default switching frequency."
      },
      {
        "number": "8",
        "name": "PGOOD",
        "type": "output",
        "description": "Open drain output for power-good flag; use 10-kΩ to 100-kΩ pullup resistor to logic rail or DC voltage no higher than 12V."
      },
      {
        "number": "9",
        "name": "FB",
        "type": "input",
        "description": "Feedback sense input pin connected to midpoint of feedback divider to set VOUT; do not short to ground during operation."
      },
      {
        "number": "10",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground pin providing ground reference for internal references and logic; connect to system ground."
      },
      {
        "number": "11",
        "name": "SS/TRK",
        "type": "input",
        "description": "Soft-start control pin; leave floating for internal soft-start slew rate, connect to capacitor to extend soft start time, or connect external voltage ramp for tracking."
      },
      {
        "number": "12",
        "name": "EN",
        "type": "input",
        "description": "Enable input to internal LDO and regulator with high = ON and low = OFF; connect to VIN, resistor divider, or external voltage source, do not float."
      },
      {
        "number": "13",
        "name": "VIN",
        "type": "power_in",
        "description": "Supply input pin to internal LDO and high side power FET with voltage range 3.5V to 36V (absolute maximum 42V); connect to power supply and bypass capacitors CIN with path as short as possible."
      },
      {
        "number": "14",
        "name": "VIN",
        "type": "power_in",
        "description": "Supply input pin to internal LDO and high side power FET with voltage range 3.5V to 36V (absolute maximum 42V); connect to power supply and bypass capacitors CIN with path as short as possible."
      },
      {
        "number": "15",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground pin connected internally to low side power FET; connect to system ground, PAD, AGND, and ground pins of CIN and COUT with path as short as possible."
      },
      {
        "number": "16",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground pin connected internally to low side power FET; connect to system ground, PAD, AGND, and ground pins of CIN and COUT with path as short as possible."
      },
      {
        "number": "17",
        "name": "PAD",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Exposed PAD (listed as 'PAD - -' without pin number in datasheet) serves as low impedance connection",
          "exposed pad 17 added from the footprint"
        ],
        "pages_sent": 8,
        "cost_usd": 0.1184,
        "at": "2026-10-05T23:13:03"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm43603-q1",
        "pages": 50,
        "sha256": "a594b61b24d8e622",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 17,
        "described": 17,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "HTSSOP-16-EP",
      "Category": "Power Supply Chip",
      "Pins": "17"
    }
  },
  "variants": [],
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  "discovery_triggers": [
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  "discovery_pitch": "LM43603AQPWPRQ1 (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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