TX4221

{
  "schema_version": 1,
  "type": "component",
  "slug": "tx4221",
  "title": "TX4221",
  "brief": "XDS DC-DC Converters, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "tx4221"
  ],
  "component": {
    "mpn": "TX4221",
    "manufacturer": "XDS",
    "package": "SOP-8",
    "pin_count": 8,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/c7b99408c2b65604fdaeb8bf73e4fc1e.pdf",
    "parts": {
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      "footprint": "tx4221.kicad_mod",
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      "model_3d_plain": "tx4221.glb",
      "model_3d_step": "tx4221-etched.step",
      "model_3d_step_plain": "tx4221.step",
      "lbr": "tx4221.lbr"
    },
    "distributor_links": {
      "lcsc": "C329269"
    },
    "pins": [
      {
        "number": "1",
        "name": "DRV",
        "type": "output",
        "description": "Gate drive output for the external power MOSFET. Rise/fall time ~50 ns into 500 pF; absolute maximum 8 V."
      },
      {
        "number": "2",
        "name": "VDD",
        "type": "power_in",
        "description": "Chip supply input. Operating range 5-40 V (absolute max 45 V). UVLO threshold ~4.8 V; operating current ~2.5 mA at 200 kHz."
      },
      {
        "number": "3",
        "name": "EN",
        "type": "input",
        "description": "Chip enable, active high. VIH >= 3.2 V, VIL <= 0.8 V. Absolute max 45 V. Pulling EN low puts the chip in standby (~75 uA)."
      },
      {
        "number": "4",
        "name": "ROSC",
        "type": "input",
        "description": "External resistor to GND sets the switching frequency: Fs = 4.83e7 / (ROSC + 1.08e5) Hz. With ROSC tied directly to GND the internal frequency defaults to ~450 kHz; typical values 100-330 kOhm (150 kHz at 330 kOhm)."
      },
      {
        "number": "5",
        "name": "FB",
        "type": "input",
        "description": "Output voltage feedback pin. Internal reference V_FB = 1.000 V (975-1025 mV). Vout = (R1+R2)/R1 * V_FB. Absolute max 6.5 V."
      },
      {
        "number": "6",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection; leave floating (悬空)."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground reference."
      },
      {
        "number": "8",
        "name": "VCS",
        "type": "input",
        "description": "MOSFET switch current-limit sense input. Over-current threshold typ. 250 mV (240-260 mV). Peak inductor current IPK <= 0.25 / R_CS. Absolute max 6.5 V."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/c7b99408c2b65604fdaeb8bf73e4fc1e.pdf",
        "pages": 6,
        "sha256": "baf00f6a9445dd43",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -1.905
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-8_3.9x4.9mm_P1.27mm@sha256:074ecb2092b24fa4",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "tx4221.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
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        "zmin_mm": 0,
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        "sha256": "1011f5801cab29b6a4d951aaa41c8bd1780bfdea9e570898730dd2a55acd9b84",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "XDS",
      "Package": "SOP-8",
      "Category": "PMIC",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "baf00f6a9445dd43",
      "rows": [
        {
          "name": "工作电压",
          "symbol": "VDD",
          "kind": "electrical",
          "unit": "V",
          "min": 5,
          "typ": null,
          "max": 40,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "过流保护阀值",
          "symbol": "TH_VCS",
          "kind": "electrical",
          "unit": "mV",
          "min": 240,
          "typ": 250,
          "max": 260,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "FB脚采样电压",
          "symbol": "V_FB",
          "kind": "electrical",
          "unit": "mV",
          "min": 975,
          "typ": 1000,
          "max": 1025,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "输入电压",
          "symbol": "VDD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 45,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "使能",
          "symbol": "EN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 45,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "驱动端",
          "symbol": "DRV",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 8,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "最大输入",
          "symbol": "V_MAX",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6.5,
          "conditions": "TOFF/FB/CS",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "工作结温度",
          "symbol": "TA",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "存储温度",
          "symbol": "T_STG",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 120,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "焊接温度",
          "symbol": "T_SD",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 240,
          "conditions": "焊接，10秒左右",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "静电耐压值",
          "symbol": "V_ESD",
          "kind": "absolute_maximum",
          "unit": "KV",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "人体模型",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "功耗",
          "symbol": "P_SOP8",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "P_SOP8",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "欠压保护电压",
          "symbol": "V_UVLO",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 4.8,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "工作电流",
          "symbol": "IOP",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 2.5,
          "max": null,
          "conditions": "FoP=200KHz",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "待机输入电流",
          "symbol": "I_INQ",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": 75,
          "max": null,
          "conditions": "无负载， EN 为低电平",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "工作频率",
          "symbol": "F_TOFF",
          "kind": "electrical",
          "unit": "KHz",
          "min": null,
          "typ": 150,
          "max": null,
          "conditions": "ROSC=330K",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "EN端_高电平",
          "symbol": "H_EN",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 3.2,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "EN端_低电平",
          "symbol": "L_EN",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.8,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "DRV驱动上升时间",
          "symbol": "T_RISE",
          "kind": "electrical",
          "unit": "ns",
          "min": null,
          "typ": 50,
          "max": null,
          "conditions": "DRV脚接500P电容",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "DRV驱动下降时间",
          "symbol": "T_FALL",
          "kind": "electrical",
          "unit": "ns",
          "min": null,
          "typ": 50,
          "max": null,
          "conditions": "DRV脚接500P电容",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "过温保护",
          "symbol": "TH_OTP",
          "kind": "electrical",
          "unit": "℃",
          "min": null,
          "typ": 140,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "最大占空比",
          "symbol": "D_MAX",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 87,
          "max": null,
          "conditions": "VFB=0V",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
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  "discovery_triggers": [
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  "discovery_pitch": "TX4221 (XDS) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
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  "updated_at": "2026-09-25T13:17:47.679Z"
}