LM3100MHX

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  "slug": "lm3100mhx",
  "title": "LM3100MHX",
  "brief": "Texas Instruments DC-DC Converters, HTSSOP-20-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
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    "power management ics",
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  "component": {
    "mpn": "LM3100MHX",
    "manufacturer": "Texas Instruments",
    "package": "HTSSOP-20-EP",
    "pin_count": 21,
    "category": "Power Management ICs",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.ti.com/lit/ds/symlink/lm3100mhx.pdf",
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    "distributor_links": {
      "lcsc": "C187923"
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    "distributor_check": {
      "checked_at": "2026-10-22T21:04:24Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
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      "mouser": {
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    },
    "pins": [
      {
        "number": "1",
        "name": "N/C",
        "type": "unconnected",
        "description": "No connection; this pin must be left unconnected."
      },
      {
        "number": "2",
        "name": "SW",
        "type": "output",
        "description": "Switching node internally connected to the buck switch source; connect to the output inductor."
      },
      {
        "number": "3",
        "name": "SW",
        "type": "output",
        "description": "Switching node internally connected to the buck switch source; connect to the output inductor."
      },
      {
        "number": "4",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply pin to the device with a nominal input range of 4.5 V to 36 V."
      },
      {
        "number": "5",
        "name": "VIN",
        "type": "power_in",
        "description": "Input supply pin to the device with a nominal input range of 4.5 V to 36 V."
      },
      {
        "number": "6",
        "name": "BST",
        "type": "passive",
        "description": "Bootstrap capacitor connection; connect a 0.033 µF capacitor from SW to this pin, charged by an internal diode during the high-side switch off-time."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Analog ground for all internal circuitry other than the synchronous switches."
      },
      {
        "number": "8",
        "name": "SS",
        "type": "passive",
        "description": "Soft-start pin where an internal 8 µA current source charges an external capacitor to provide the soft-start function."
      },
      {
        "number": "9",
        "name": "N/C",
        "type": "unconnected",
        "description": "No connection; this pin must be left unconnected."
      },
      {
        "number": "10",
        "name": "N/C",
        "type": "unconnected",
        "description": "No connection; this pin must be left unconnected."
      },
      {
        "number": "11",
        "name": "TST",
        "type": "input",
        "description": "Test mode enable pin that forces the device into test mode; must be connected to ground for normal operation."
      },
      {
        "number": "12",
        "name": "N/C",
        "type": "unconnected",
        "description": "No connection; this pin must be left unconnected."
      },
      {
        "number": "13",
        "name": "FB",
        "type": "input",
        "description": "Feedback input internally connected to the regulation and over-voltage comparators with a 0.8 V regulation setting; connect to the feedback divider."
      },
      {
        "number": "14",
        "name": "EN",
        "type": "input",
        "description": "Enable pin; connect a voltage higher than 1.26 V to enable the regulator."
      },
      {
        "number": "15",
        "name": "RON",
        "type": "input",
        "description": "On-time control pin where an external resistor from VIN sets the high-side switch on-time."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_out",
        "description": "Start-up regulator output nominally regulated to 6 V; connect a capacitor of not less than 680 nF between VCC and GND."
      },
      {
        "number": "17",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground at the synchronous rectifier MOSFET source; tie to the power ground plane."
      },
      {
        "number": "18",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground at the synchronous rectifier MOSFET source; tie to the power ground plane."
      },
      {
        "number": "19",
        "name": "N/C",
        "type": "unconnected",
        "description": "No connection; this pin must be left unconnected."
      },
      {
        "number": "20",
        "name": "N/C",
        "type": "unconnected",
        "description": "No connection; this pin must be left unconnected."
      },
      {
        "number": "21",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
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        "pages": 24,
        "sha256": "0b3a1e5eb905b98b",
        "source_tier": "mfr"
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  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "HTSSOP-20-EP",
      "Category": "Power Management ICs",
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          "conditions": "Human-body model (HBM)",
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        {
          "name": "Supply Voltage Range",
          "symbol": "VIN",
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          "name": "Junction Temperature Range",
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        {
          "name": "Junction-to-case thermal resistance",
          "symbol": "RθJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
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          "max": null,
          "conditions": "PWP (HTSSOP) 20 pins",
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        {
          "name": "VCC Output voltage",
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          "kind": "electrical",
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          "typ": 6,
          "max": 7.2,
          "conditions": "CCC = 680 nF, no load, TJ = –40°C to 125°C",
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        {
          "name": "VIN - VCC Dropout voltage",
          "symbol": "",
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        {
          "name": "VCC current limit",
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          "max": 65,
          "conditions": "VCC = 0 V, TJ = –40°C to 125°C",
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        {
          "name": "VCC under-voltage lockout threshold",
          "symbol": "VCC-UVLO",
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          "min": 3.6,
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          "max": 3.85,
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        {
          "name": "UVLO hysteresis",
          "symbol": "VCC-UVLO-HYS",
          "kind": "electrical",
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          "min": null,
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        {
          "name": "UVLO filter delay",
          "symbol": "tVCC-UVLO-D",
          "kind": "electrical",
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          "min": null,
          "typ": 3,
          "max": null,
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          "name": "Operating current",
          "symbol": "IIN",
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          "unit": "mA",
          "min": null,
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          "max": 1,
          "conditions": "No switching, VFB = 1 V, TJ = –40°C to 125°C",
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        {
          "name": "Operating current, device shutdown",
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          "max": 30,
          "conditions": "VEN = 0 V, TJ = –40°C to 125°C",
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          "name": "Main MOSFET Rds(on)",
          "symbol": "RDS-UP-ON",
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          "max": 0.35,
          "conditions": "TJ = –40°C to 125°C",
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          "name": "Syn. MOSFET Rds(on)",
          "symbol": "RDS-DN-ON",
          "kind": "electrical",
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          "max": 0.2,
          "conditions": "TJ = –40°C to 125°C",
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        {
          "name": "Gate drive voltage UVLO",
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          "kind": "electrical",
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          "max": 4,
          "conditions": "VBST - VSW increasing, TJ = –40°C to 125°C",
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        {
          "name": "SS pin source current",
          "symbol": "ISS",
          "kind": "electrical",
          "unit": "µA",
          "min": 6,
          "typ": 8,
          "max": 9.8,
          "conditions": "VSS = 0.5 V, TJ = –40°C to 125°C",
          "source_page": 5,
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        {
          "name": "Syn. MOSFET current limit threshold",
          "symbol": "ICL",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 1.9,
          "max": null,
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        {
          "name": "ON timer pulse width",
          "symbol": "tON",
          "kind": "electrical",
          "unit": "µs",
          "min": null,
          "typ": 1.38,
          "max": null,
          "conditions": "VIN = 10 V, RON = 100 kΩ",
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        {
          "name": "ON timer pulse width",
          "symbol": "tON",
          "kind": "electrical",
          "unit": "µs",
          "min": null,
          "typ": 0.47,
          "max": null,
          "conditions": "VIN = 30 V, RON = 100 kΩ",
          "source_page": 5,
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        },
        {
          "name": "ON timer minimum pulse width",
          "symbol": "tON-MIN",
          "kind": "electrical",
          "unit": "ns",
          "min": null,
          "typ": 200,
          "max": null,
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        {
          "name": "OFF timer pulse width",
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          "kind": "electrical",
          "unit": "ns",
          "min": null,
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          "name": "EN Pin input threshold",
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          "min": 1.236,
          "typ": 1.26,
          "max": 1.285,
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          "name": "Enable threshold hysteresis",
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          "name": "In-regulation feedback voltage",
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          "min": 0.784,
          "typ": 0.8,
          "max": 0.816,
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          "name": "Feedback over-voltage threshold",
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          "name": "Feedback input current",
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          "max": 100,
          "conditions": "TJ = –40°C to 125°C",
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          "conditions": "TJ rising",
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          "name": "Thermal shutdown temperature hysteresis",
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          "unit": "°C",
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          "typ": 20,
          "max": null,
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