TX4137

{
  "schema_version": 1,
  "type": "component",
  "slug": "tx4137",
  "title": "TX4137",
  "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",
    "tx4137"
  ],
  "component": {
    "mpn": "TX4137",
    "manufacturer": "XDS",
    "package": "SOT-23-6",
    "pin_count": 6,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "docs/tx4137-datasheet.pdf",
    "parts": {
      "symbol": "tx4137.kicad_sym",
      "footprint": "tx4137.kicad_mod",
      "model_3d": "tx4137-etched.glb",
      "model_3d_plain": "tx4137.glb",
      "model_3d_step": "tx4137-etched.step",
      "model_3d_step_plain": "tx4137.step",
      "lbr": "tx4137.lbr"
    },
    "distributor_links": {
      "lcsc": "C691124"
    },
    "pins": [
      {
        "number": "1",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect. Leave floating."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the IC. Connect to the system ground plane using a large copper area to improve thermal dissipation."
      },
      {
        "number": "3",
        "name": "FB",
        "type": "input",
        "description": "Output feedback voltage pin. Connect to the mid-point of an external resistor divider from VOUT to GND. The internal reference is 0.812V (typ, 0.792-0.832V). Absolute max 6V."
      },
      {
        "number": "4",
        "name": "EN",
        "type": "input",
        "description": "Chip enable input. Rising threshold ~1.35V, falling ~1.17V, hysteresis 180mV. Do not leave floating; pull up to IN through ~510kΩ if unused. Absolute max 6V."
      },
      {
        "number": "5",
        "name": "IN",
        "type": "power_in",
        "description": "Chip power input. Operates from 5.5V to 60V (abs max 65V). Bypass with a low-ESR ceramic capacitor (X5R/X7R, typically 4.7µF) placed close to the pin."
      },
      {
        "number": "6",
        "name": "SW",
        "type": "output",
        "description": "Switch node output; drain of the internal high-side power MOSFET (RDS(on) ≈ 0.9Ω). Connect to the inductor and to the freewheeling Schottky diode cathode. Operates from -0.3V to VIN+0.3V."
      }
    ],
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      "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": "tx4137.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)"
      },
      {
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "0c39675d6f35ef6c76eb0f92a03d4a4ec0658da6e234ca4dbc4488b46238cc44",
        "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"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "977d631c3d6360a2",
      "rows": [
        {
          "name": "Feedback voltage",
          "symbol": "VFB",
          "kind": "electrical",
          "unit": "V",
          "min": 0.792,
          "typ": 0.812,
          "max": 0.832,
          "conditions": "4.5V < VIN < 60V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Current limit threshold",
          "symbol": "ILIM",
          "kind": "electrical",
          "unit": "A",
          "min": 1,
          "typ": 1.25,
          "max": 1.5,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Oscillator frequency",
          "symbol": "fSW",
          "kind": "electrical",
          "unit": "kHz",
          "min": 400,
          "typ": 500,
          "max": 600,
          "conditions": "VFB = 0.6V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Minimum on time",
          "symbol": "τON",
          "kind": "electrical",
          "unit": "ns",
          "min": 100,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Feedback current",
          "symbol": "IFB",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.1,
          "max": null,
          "conditions": "VFB = 0.85V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Switch on-resistance (internal MOSFET)",
          "symbol": "RDS(ON)",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.9,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Switch leakage current",
          "symbol": "ISW_LKG",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 1,
          "max": null,
          "conditions": "VEN = 0V, VSW = 0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum duty cycle",
          "symbol": "DMAX",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 95,
          "max": null,
          "conditions": "VFB = 0.6V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "UVLO rising voltage",
          "symbol": "UUVLO_R",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 5.5,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "UVLO hysteresis voltage",
          "symbol": "UUVLO_HYS",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 500,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "EN rising threshold",
          "symbol": "VEN_R",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.35,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "EN falling threshold",
          "symbol": "VEN_F",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.17,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "EN hysteresis threshold",
          "symbol": "VEN_HYS",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 180,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "EN output current",
          "symbol": "IEN",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 3.1,
          "max": null,
          "conditions": "VEN = 2V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "EN output current",
          "symbol": "IEN",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.1,
          "max": null,
          "conditions": "VEN = 0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VIN shutdown current",
          "symbol": "IS",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 3,
          "max": null,
          "conditions": "VEN = 0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VIN quiescent current",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.7,
          "max": 0.8,
          "conditions": "VEN = 2V, VFB = 1V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Thermal shutdown temperature",
          "symbol": "TSD",
          "kind": "electrical",
          "unit": "°C",
          "min": null,
          "typ": 165,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Thermal shutdown hysteresis",
          "symbol": "TSD_HYS",
          "kind": "electrical",
          "unit": "°C",
          "min": null,
          "typ": 20,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "IN pin operating voltage range (absolute maximum)",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 65,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "SW pin operating voltage range (absolute maximum)",
          "symbol": "VSW",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "EN and FB pin operating voltage range (absolute maximum)",
          "symbol": "Vmax",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "EN pin sink current (absolute maximum)",
          "symbol": "IEN_SINK",
          "kind": "absolute_maximum",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating temperature range",
          "symbol": "TA",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "SOT23-6 maximum power dissipation",
          "symbol": "PSOT23-6",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 0.25,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -45,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Soldering temperature (under 30 s)",
          "symbol": "TSD",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Time less than 30 s",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "ESD withstand voltage (human body model)",
          "symbol": "VESD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 2000,
          "conditions": "Human body model",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input voltage range (product feature)",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 5.5,
          "typ": null,
          "max": 60,
          "conditions": "",
          "source_page": 1,
          "source": "datasheet"
        }
      ]
    }
  },
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  "discovery_triggers": [
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  "discovery_pitch": "TX4137 (XDS) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
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  "updated_at": "2026-09-25T13:16:17.635Z"
}