MAX17503ATP+T

{
  "slug": "max17503atp-t",
  "version": "0.1.0",
  "type": "component",
  "description": "Analog Devices Inc Maxim Integrated DC-DC Converters, TQFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "max17503atp+t",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
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    "README.md",
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    "max17503atp-t.kicad_mod",
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    "max17503atp-t.step",
    "max17503atp-t.lbr",
    "docs/hero.png",
    "docs/max17503atp-t-datasheet.pdf",
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    "viewers/footprint.html",
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    "max17503atp-t-hero.overlay.json",
    "max17503atp-t-etched.glb"
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  "component": {
    "mpn": "MAX17503ATP+T",
    "manufacturer": "Analog Devices Inc Maxim Integrated",
    "package": "TQFN-20-EP(4x4)",
    "pin_count": 21,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588911637554610176",
    "parts": {
      "symbol": "max17503atp-t.kicad_sym",
      "footprint": "max17503atp-t.kicad_mod",
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      "model_3d_step": "max17503atp-t-etched.step",
      "model_3d_step_plain": "max17503atp-t.step",
      "lbr": "max17503atp-t.lbr"
    },
    "distributor_links": {
      "lcsc": "C2682629",
      "digikey": "MAX17503ATP+TTR-ND"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T22:20:22Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "MAX17503ATP+TTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VIN",
        "type": "power_in",
        "description": "Power-supply input with a 4.5V to 60V input supply range; connect the VIN pins together and decouple to PGND with a 2.2µF capacitor placed close to the VIN and PGND pins."
      },
      {
        "number": "2",
        "name": "VIN",
        "type": "power_in",
        "description": "Power-supply input with a 4.5V to 60V input supply range; connect together with the other VIN pins and decouple to PGND with a 2.2µF capacitor placed close to the VIN and PGND pins."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "Power-supply input with a 4.5V to 60V input supply range; connect together with the other VIN pins and decouple to PGND with a 2.2µF capacitor placed close to the VIN and PGND pins."
      },
      {
        "number": "4",
        "name": "EN/UVLO",
        "type": "input",
        "description": "Enable/undervoltage lockout: drive high to enable the output, connect to the center of a VIN-to-SGND resistor divider to set the turn-on input voltage, or pull up to VIN for always-on operation."
      },
      {
        "number": "5",
        "name": "RESET",
        "type": "output",
        "description": "Open-drain RESET output that is driven low if FB drops below 92% of its set value and goes high 1024 clock cycles after FB rises above 95% of its set value."
      },
      {
        "number": "6",
        "name": "SYNC",
        "type": "input",
        "description": "External clock synchronization input that synchronizes the device switching frequency to an external clock, as described in the External Frequency Synchronization (SYNC) section."
      },
      {
        "number": "7",
        "name": "SS",
        "type": "input",
        "description": "Soft-start input; connect a capacitor from SS to SGND to set the soft-start time."
      },
      {
        "number": "8",
        "name": "CF",
        "type": "passive",
        "description": "Connect a capacitor from CF to FB at switching frequencies below 500kHz, and leave CF open for switching frequencies of 500kHz or higher."
      },
      {
        "number": "9",
        "name": "FB",
        "type": "input",
        "description": "Feedback input; connect to the center tap of an external resistor divider from the output to GND to set the output voltage."
      },
      {
        "number": "10",
        "name": "RT",
        "type": "passive",
        "description": "Connect a resistor from RT to SGND to set the switching frequency; leave RT open for the default 500kHz frequency."
      },
      {
        "number": "11",
        "name": "MODE",
        "type": "input",
        "description": "Mode select latched at power-up: leave open for PFM, connect to SGND for constant-frequency PWM at all loads, or connect to VCC for constant-frequency DCM at light loads."
      },
      {
        "number": "12",
        "name": "VCC",
        "type": "power_out",
        "description": "5V LDO output that must be bypassed to SGND with 2.2µF ceramic capacitance."
      },
      {
        "number": "13",
        "name": "SGND",
        "type": "power_in",
        "description": "Analog ground; the SGND and PGND pins are connected together at the ground return path of the VCC bypass capacitor."
      },
      {
        "number": "14",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground; connect externally to the power ground plane and tie to SGND at the return path of the VCC bypass capacitor."
      },
      {
        "number": "15",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground; connect externally to the power ground plane and tie to SGND at the return path of the VCC bypass capacitor."
      },
      {
        "number": "16",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground; connect externally to the power ground plane and tie to SGND at the return path of the VCC bypass capacitor."
      },
      {
        "number": "17",
        "name": "LX",
        "type": "output",
        "description": "Switching node connected to the switching side of the inductor; the datasheet specifies LX total RMS current of ±4A absolute maximum."
      },
      {
        "number": "18",
        "name": "LX",
        "type": "output",
        "description": "Switching node connected to the switching side of the inductor; connect all LX pins to the inductor switching side."
      },
      {
        "number": "19",
        "name": "LX",
        "type": "output",
        "description": "Switching node connected to the switching side of the inductor; connect all LX pins to the inductor switching side."
      },
      {
        "number": "20",
        "name": "BST",
        "type": "passive",
        "description": "Boost flying capacitor pin; connect a 0.1µF ceramic capacitor between BST and LX."
      },
      {
        "number": "21",
        "name": "EP",
        "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-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Ordering table (page 26) lists the orderable part MAX17503ATP+ as '20 TQFN 4mm x 4 mm' without an ex; The datasheet's pin table lists pins 1-3, 14-16 and 17-19 as grouped ranges; each pin in those group; The datasheet gives no electrical spec field in this schema context beyond the pin functions; no pin",
          "exposed pad 21 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint"
        ],
        "pages_sent": 8,
        "cost_usd": 0.0614,
        "at": "2026-10-17T22:19:14"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588911637554610176",
        "pages": 27,
        "sha256": "67d45e7c35519621",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 21,
        "described": 21,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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      "footprint": "viewers/footprint.html"
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        "origin": "footprint origin = pad-pattern centre",
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        "zmin_mm": 0.0,
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        "checked": "2026-10-17",
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      {
        "file": "max17503atp-t-etched.step",
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        "sha256": "788cb39745997e0ed52dd52e10b6f7ae92b79fb3d9c3bfa5d70538691e942411",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  }
}