TMI3253S

{
  "schema_version": 1,
  "type": "component",
  "slug": "tmi3253s",
  "title": "TMI3253S",
  "brief": "TMI 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",
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    "pmic",
    "tmi3253s"
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  "component": {
    "mpn": "TMI3253S",
    "manufacturer": "TMI",
    "package": "SOT-23-6",
    "pin_count": 6,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/b217894d0567069215c9e521e2d81ef4.pdf",
    "parts": {
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      "lbr": "tmi3253s.lbr"
    },
    "distributor_links": {
      "lcsc": "C478943"
    },
    "pins": [
      {
        "number": "1",
        "name": "BS",
        "type": "passive",
        "description": "Bootstrap. A capacitor connected between LX and BS pins is required to form a floating supply across the high-side switch driver. Absolute-maximum BS voltage is 26V; BS-to-LX max is 6V."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground return pin for the IC and the low-side power MOSFET source."
      },
      {
        "number": "3",
        "name": "FB",
        "type": "input",
        "description": "Output-voltage feedback input. Connect to the center tap of the external resistor divider. Regulated to VREF=0.6V typ (TMI3253S). Absolute maximum -0.3V to 6V."
      },
      {
        "number": "4",
        "name": "EN",
        "type": "input",
        "description": "Enable input. Drive logic-high to enable the IC; drive logic-low to disable and enter micro-power shutdown. Do not float. EN rising threshold ~0.95V (0.85V-1.05V), 180mV hysteresis. Abs-max 20V."
      },
      {
        "number": "5",
        "name": "IN",
        "type": "power_in",
        "description": "Power supply input. Operating range 4.5V to 18V; UVLO rising ~4.3V. Absolute maximum 20V. Bypass with a low-ESR ceramic capacitor (22µF typical) to GND."
      },
      {
        "number": "6",
        "name": "LX",
        "type": "power_out",
        "description": "Switching node. Common drain of the integrated high-side and low-side power MOSFETs; connects to the external inductor. Abs-max -0.3V to 20V (-4.5V to 22V transient <10ns)."
      }
    ],
    "provenance": {
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        "pages": 16,
        "sha256": "b58c2a4a18985f81",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 6,
        "described": 6,
        "cites_pages": true,
        "refuses_to_fabricate": true
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    "viewers": {
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    "pin1": {
      "pad": "1",
      "at": [
        -1.1375,
        -0.95
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOT-23-6@sha256:f341c73aac9dcb55",
      "mark": "drawn"
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
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        "sha256": "c9fe686b4d1b56927a41fa84a9bc1efb61d8a45a123a3db43bcaa05c2891d635",
        "checked": "2026-10-07",
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      "Package": "SOT-23-6",
      "Category": "PMIC",
      "Pins": "6"
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        {
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        {
          "name": "Storage Temperature Range",
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        {
          "name": "TJ Operating Junction Temperature",
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          "name": "OVP Threshold",
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          "name": "Regulated Feedback Voltage (3253S)",
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          "name": "Shutdown Current",
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        {
          "name": "High-Side Switch Leakage Current",
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        {
          "name": "Switch Valley Current Limit",
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          "conditions": "VIN=12V, VOUT=1.2V, IOUT=1A",
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          "name": "Oscillation Frequency",
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          "kind": "electrical",
          "unit": "kHz",
          "min": 450,
          "typ": 600,
          "max": 750,
          "conditions": "Maximum Duty Cycle",
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        {
          "name": "Soft Start Time",
          "symbol": "",
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          "min": 0.5,
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          "name": "EN Rising Threshold",
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        {
          "name": "Absolute maximum Junction Temperature",
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          "name": "Power Dissipation",
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        {
          "name": "Lead Temperature (Soldering, 10s)",
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          "name": "UVLO Rising Threshold",
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        {
          "name": "UVLO Hysteresis",
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          "name": "Quiescent Current",
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          "max": null,
          "conditions": "VEN=2V, VFB=VREF x 105%",
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          "name": "High-Side Switch On-Resistance",
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          "unit": "mΩ",
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        {
          "name": "Low-Side Switch On-Resistance",
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          "kind": "electrical",
          "unit": "mΩ",
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          "typ": 35,
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        {
          "name": "Maximum Duty Cycle",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 90,
          "max": null,
          "conditions": "",
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        {
          "name": "Minimum On-Time",
          "symbol": "",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 80,
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        {
          "name": "Hiccup on Time",
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        {
          "name": "Hiccup Time Before Restart",
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        {
          "name": "EN Hysteresis",
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          "unit": "mV",
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          "name": "Thermal Shutdown Threshold",
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          "name": "Junction-to-ambient thermal resistance",
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          "name": "Junction-to-case(top) characterization parameter",
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  "updated_at": "2026-09-25T11:01:04.115Z"
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