LM43603PWPR

{
  "slug": "lm43603pwpr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments DC-DC Converters, TSSOP-16-EP. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "lm43603pwpr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lm43603pwpr.kicad_sym",
    "lm43603pwpr.kicad_mod",
    "lm43603pwpr.glb",
    "lm43603pwpr.step",
    "lm43603pwpr.lbr",
    "docs/hero.png",
    "docs/lm43603pwpr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "component": {
    "mpn": "LM43603PWPR",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-16-EP",
    "pin_count": 17,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm43603",
    "parts": {
      "symbol": "lm43603pwpr.kicad_sym",
      "footprint": "lm43603pwpr.kicad_mod",
      "model_3d": "lm43603pwpr-etched.glb",
      "model_3d_plain": "lm43603pwpr.glb",
      "model_3d_step": "lm43603pwpr-etched.step",
      "model_3d_step_plain": "lm43603pwpr.step",
      "lbr": "lm43603pwpr.lbr"
    },
    "distributor_links": {
      "lcsc": "C412826"
    },
    "pins": [
      {
        "number": "1",
        "name": "SW",
        "type": "output",
        "description": "Switching output of the regulator, internally connected to both power MOSFETs; connect to power inductor."
      },
      {
        "number": "2",
        "name": "SW",
        "type": "output",
        "description": "Switching output of the regulator, internally connected to both power MOSFETs; connect to power inductor."
      },
      {
        "number": "3",
        "name": "CBOOT",
        "type": "output",
        "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, 3.28V typical; connect bypass capacitor from this pin to AGND; do not connect external loading or short to ground during operation."
      },
      {
        "number": "5",
        "name": "BIAS",
        "type": "power_in",
        "description": "Optional internal LDO supply input (3.3V to 28V); tie to VOUT when 3.3V ≤ VOUT ≤ 28V or to external 3.3V/5V rail; place 1-10µF bypass capacitor when used, tie to ground when not in use; do not float."
      },
      {
        "number": "6",
        "name": "SYNC",
        "type": "input",
        "description": "Clock input to synchronize switching action to external clock from 200kHz to 2.2MHz; use proper high-speed termination; connect to ground if not used; do not float."
      },
      {
        "number": "7",
        "name": "RT",
        "type": "input",
        "description": "Frequency programming input; connect resistor from this pin to AGND to program switching frequency (200kHz to 2.2MHz) or leave floating for 500kHz default."
      },
      {
        "number": "8",
        "name": "PGOOD",
        "type": "tri_state",
        "description": "Open-drain power-good flag output; use 10kΩ to 100kΩ pullup resistor to logic rail no higher than 12V; provides 220µs deglitch delay."
      },
      {
        "number": "9",
        "name": "FB",
        "type": "input",
        "description": "Feedback sense input pin; connect to midpoint of feedback divider to set VOUT; reference voltage 1.011V typical; do not short this pin to ground during operation."
      },
      {
        "number": "10",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground pin serving as 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 4.1ms internal soft-start or connect capacitor to extend soft-start time; can connect external voltage ramp for output voltage tracking."
      },
      {
        "number": "12",
        "name": "EN",
        "type": "input",
        "description": "Enable input to internal LDO and regulator; high enables operation and low disables; connect to VIN, resistor divider, or external voltage/logic source; do not float; 2.1V typical enable threshold."
      },
      {
        "number": "13",
        "name": "VIN",
        "type": "power_in",
        "description": "Supply input pins to internal LDO and high-side power FET, 3.5V to 36V range; connect to power supply and bypass capacitors CIN; maintain short path to high-frequency bypass capacitor and PGND."
      },
      {
        "number": "14",
        "name": "VIN",
        "type": "power_in",
        "description": "Supply input pins to internal LDO and high-side power FET, 3.5V to 36V range; connect to power supply and bypass capacitors CIN; maintain short path to high-frequency bypass capacitor and PGND."
      },
      {
        "number": "15",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground pins connected internally to low-side power FET; connect to system ground, PAD, AGND, and ground pins of input/output capacitors; maintain short path to CIN."
      },
      {
        "number": "16",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground pins connected internally to low-side power FET; connect to system ground, PAD, AGND, and ground pins of input/output capacitors; maintain short path to CIN."
      },
      {
        "number": "17",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "exposed pad 17 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 59,
        "cost_usd": 0.6177,
        "at": "2026-09-23T08:52:01"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm43603",
        "pages": 59,
        "sha256": "2642edca40e62388",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 17,
        "described": 17,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "lm43603pwpr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          5.0,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "7982746831c0bd23f4690608869ad67776faae5c762fb0376666126a3998921b",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm43603pwpr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          5.0,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "7603e33280abb7b8287a3db8f97c7333d9724bda6f6849e26a4411fa694a34d9",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}