TX4120x

{
  "schema_version": 1,
  "type": "component",
  "slug": "tx4120x",
  "title": "TX4120x",
  "brief": "XDS DC-DC Converters, SOT-23-6. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "tx4120x"
  ],
  "component": {
    "mpn": "TX4120x",
    "manufacturer": "XDS",
    "package": "SOT-23-6",
    "pin_count": 6,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/30494273ef45968a0d784d1e5391630c.pdf",
    "parts": {
      "symbol": "tx4120x.kicad_sym",
      "footprint": "tx4120x.kicad_mod",
      "model_3d": "tx4120x-etched.glb",
      "model_3d_plain": "tx4120x.glb",
      "model_3d_step": "tx4120x-etched.step",
      "model_3d_step_plain": "tx4120x.step",
      "lbr": "tx4120x.lbr"
    },
    "distributor_links": {
      "lcsc": "C448643"
    },
    "pins": [
      {
        "number": "1",
        "name": "FB",
        "type": "input",
        "description": "Feedback input for the internal error amplifier. An external resistor divider from VOUT to FB sets the output voltage per VOUT = VREF*(R1+R2)/R2 with VREF = 0.9 V. Output over-voltage threshold is 1.1*VFB."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground return for the internal power stage, control logic, and reference."
      },
      {
        "number": "3",
        "name": "VDD",
        "type": "power_in",
        "description": "Main input supply, 4.5 V to 36 V absolute max (VIN limited to 27 V when EN switching is used). Bypass close to the pin with a low-ESR ceramic capacitor (X5R/X7R recommended)."
      },
      {
        "number": "4",
        "name": "SW",
        "type": "output",
        "description": "Switching node connecting the internal high-side and low-side MOSFETs. Connect to the external buck inductor and the low-side of the BST bootstrap capacitor. Absolute rating: -0.3 V to VIN+0.3 V."
      },
      {
        "number": "5",
        "name": "BST",
        "type": "passive",
        "description": "Bootstrap supply for the high-side gate driver. Connect a 100 nF ceramic capacitor between BST and SW; capacitor is refreshed from an internal LDO and typically holds ~5.3 V above SW."
      },
      {
        "number": "6",
        "name": "CS/LED/EN",
        "type": "bidirectional",
        "description": "Function of pin 6 depends on the factory option: TX4120C = CS (current-limit setting resistor to GND for adjustable current mode), TX4120D = LED (LED status indicator, open-drain to LED cathode), TX4120E = EN (active-high enable input with internal pull-up; leave open to enable). Absolute max on this pin is 6 V."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/30494273ef45968a0d784d1e5391630c.pdf",
        "pages": 10,
        "sha256": "041da529f91f7840",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 6,
        "described": 6,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -1.1375,
        -0.95
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOT-23-6@sha256:f341c73aac9dcb55",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "tx4120x.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "c9fe686b4d1b56927a41fa84a9bc1efb61d8a45a123a3db43bcaa05c2891d635",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tx4120x-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "c45b23a8c22def73ab59da33d03c039983148f1e11658ebba878a8907cbccd2d",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "XDS",
      "Package": "SOT-23-6",
      "Category": "PMIC",
      "Pins": "6"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "tx4120x"
  ],
  "discovery_pitch": "TX4120x (XDS) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "tx4120x.kicad_sym",
    "tx4120x.kicad_mod",
    "tx4120x.glb",
    "tx4120x.step",
    "tx4120x-etched.step",
    "tx4120x.lbr",
    "docs/hero.png",
    "docs/tx4120x-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "TX4120C",
      "kind": "unknown"
    },
    {
      "mpn": "TX4120D",
      "kind": "unknown"
    },
    {
      "mpn": "TX4120E",
      "kind": "unknown"
    }
  ],
  "updated_at": "2026-09-25T13:15:53.321Z"
}