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Ray Set visibility: public 34121f1 7d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "lm2940hs-3-3",
  "title": "LM2940HS-3.3",
  "brief": "HTC Korea TAEJIN Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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  "component": {
    "mpn": "LM2940HS-3.3",
    "manufacturer": "HTC Korea TAEJIN Tech",
    "package": "SOT-223-3L",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588918504636485632",
    "parts": {
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      "lbr": "lm2940hs-3-3.lbr"
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    "distributor_links": {
      "lcsc": "C784715"
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    "distributor_check": {
      "checked_at": "2026-10-18T11:21:40Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
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      "mouser": {
        "pn": null,
        "status": "quota"
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    },
    "pins": [
      {
        "number": "1",
        "name": "IN",
        "type": "power_in",
        "description": "Input voltage pin; the maximum continuous input is 26V, with 60V transients allowed only for less than 100ms at 1% duty cycle or less, and a 0.47µF input capacitor is recommended when the regulator is far from the supply filter."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin, which the datasheet says must be connected to the tab (TAB), which is also tied to GND."
      },
      {
        "number": "3",
        "name": "OUT",
        "type": "power_out",
        "description": "Regulated 3.3V output rated for up to 1.0A, which requires an output capacitor of at least 22µF placed between OUT and GND for stability."
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        "pages_sent": 9,
        "cost_usd": 0.0275,
        "at": "2026-10-18T11:18:26"
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      "datasheet": {
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        "pages": 9,
        "sha256": "cc075c78c00ff673",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
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        "role": "plain",
        "up": "Z",
        "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": "77ad6dbacc493cb619c728f26d2ddcf461eb0feb6b977b47d01d51e67016f654",
        "checked": "2026-10-18",
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        "sha256": "332daca2be39579bffb1bd53c0c9233904c56aae54f04b93714dc5ef451ded69",
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        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "HTC Korea TAEJIN Tech",
      "Package": "SOT-223-3L",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "cc075c78c00ff673ed4664a77605db01aef95cc171090fa2927574e78b8d7693",
      "rows": [
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          "name": "Input Voltage",
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          "unit": "V",
          "min": -20,
          "typ": null,
          "max": 60,
          "conditions": "Note 2",
          "source_page": 1,
          "source": "datasheet"
        },
        {
          "name": "Maximum Junction Temperature",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
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        },
        {
          "name": "Storage Temperature",
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          "unit": "°C",
          "min": -65,
          "typ": null,
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          "conditions": "",
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        {
          "name": "Maximum Operating Input Voltage (Continuous)",
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          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 26,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Ambient Temperature Range",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
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        {
          "name": "Operating Junction Temperature Range",
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        {
          "name": "Output Voltage",
          "symbol": "VOUT",
          "kind": "tolerance",
          "unit": "%",
          "min": -2,
          "typ": null,
          "max": 2,
          "conditions": "5.0mA ≤ IOUT ≤ 1.0A, (VOUT + 1.0V) ≤ VIN ≤ 26V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage (second line)",
          "symbol": "VOUT",
          "kind": "tolerance",
          "unit": "%",
          "min": -3,
          "typ": null,
          "max": 3,
          "conditions": "(VOUT + 1.0V) ≤ VIN ≤ 26V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "LNR",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.06,
          "max": 0.5,
          "conditions": "IOUT = 5.0mA, (VOUT + 1.0V) ≤ VIN ≤ 26V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "LDR",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.2,
          "max": 1,
          "conditions": "VIN = VOUT + 5.0V, 5.0mA ≤ IOUT ≤ 1.0A",
          "source_page": 5,
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        {
          "name": "Load Regulation (second line)",
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          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": null,
          "max": 1.8,
          "conditions": "VIN = VOUT + 5.0V, 5.0mA ≤ IOUT ≤ 1.0A",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.3,
          "max": 0.4,
          "conditions": "IOUT = 5.0mA",
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          "source": "datasheet"
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        {
          "name": "Quiescent Current (second line)",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "IOUT = 5.0mA",
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        {
          "name": "Quiescent Current",
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          "unit": "mA",
          "min": null,
          "typ": 11,
          "max": 16,
          "conditions": "IOUT = 1.0A",
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        {
          "name": "Quiescent Current (second line)",
          "symbol": "IQ",
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          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "IOUT = 1.0A",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage",
          "symbol": "VDO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 110,
          "max": 150,
          "conditions": "IOUT = 100mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage (second line)",
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          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 230,
          "conditions": "IOUT = 100mA",
          "source_page": 5,
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        {
          "name": "Dropout Voltage",
          "symbol": "VDO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 400,
          "max": 550,
          "conditions": "IOUT = 1.0A",
          "source_page": 5,
          "source": "datasheet"
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        {
          "name": "Dropout Voltage (second line)",
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          "kind": "electrical",
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          "min": null,
          "typ": null,
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          "conditions": "IOUT = 1.0A",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Short Circuit Current",
          "symbol": "ISC",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 1.5,
          "max": 2.4,
          "conditions": "VIN = VOUT(NOM) + 1.0V, VOUT = 0V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Noise Voltage",
          "symbol": "en",
          "kind": "electrical",
          "unit": "µVrms",
          "min": null,
          "typ": 150,
          "max": null,
          "conditions": "f = 10Hz to 100kHz",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Ripple Rejection",
          "symbol": "PSRR",
          "kind": "electrical",
          "unit": "dB",
          "min": 60,
          "typ": 72,
          "max": null,
          "conditions": "f = 120Hz (1.0Vrms), IOUT = 100mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Long Term Stability",
          "symbol": "∆VOUT/∆t",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.4,
          "max": null,
          "conditions": "t = 1000 hr",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Reverse Polarity Transient Input Voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": -35,
          "typ": null,
          "max": null,
          "conditions": "ROUT = 100Ω, t ≤ 1ms",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance Junction-To-Ambient, SOT-223-3L",
          "symbol": "θJA-SOT-223-3L",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": null,
          "max": 137,
          "conditions": "No heat sink / No air flow / No adjacent heat source / TA=25°C",
          "source_page": 8,
          "source": "datasheet"
        }
      ]
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