LM317BD2TR4G

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  "slug": "lm317bd2tr4g",
  "title": "LM317BD2TR4G",
  "brief": "onsemi Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-263-2. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
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  "component": {
    "mpn": "LM317BD2TR4G",
    "manufacturer": "onsemi",
    "package": "TO-263-2",
    "pin_count": 3,
    "category": "Power Management (PMIC)",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588885197182423040",
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    "distributor_links": {
      "lcsc": "C173771",
      "digikey": "LM317BD2TR4GOSTR-ND",
      "mouser": "863-LM317BD2TR4G"
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      "checked_at": "2026-10-09T13:21:29Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "LM317BD2TR4GOSTR-ND",
        "status": "found"
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        "pn": "863-LM317BD2TR4G",
        "status": "found"
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    },
    "pins": [
      {
        "number": "1",
        "name": "Adjust",
        "type": "passive",
        "description": "The adjustment terminal sets the output voltage through the external R1/R2 divider, with adjust current IAdj controlled to less than 100 µA, and it may be bypassed to ground with a CAdj (for example 10 µF) to improve ripple rejection."
      },
      {
        "number": "2",
        "name": "Vout",
        "type": "power_out",
        "description": "This is the regulated output, which is adjustable from 1.2 V to 37 V and is electrically connected to the heatsink surface of the package."
      },
      {
        "number": "3",
        "name": "Vin",
        "type": "power_in",
        "description": "This is the unregulated input, with an input-output differential rating of −0.3 V to 40 Vdc and regulation specified for 3.0 V ≤ VI−VO ≤ 40 V."
      }
    ],
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        "primary_model": "claude-haiku-5-5",
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        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
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        "cost_usd": 0.0701,
        "at": "2026-10-09T13:19:32"
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      "pins": {
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        "described": 3,
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        "extents_mm": [
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  "metadata": {
    "specs": {
      "Manufacturer": "onsemi",
      "Package": "TO-263-2",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
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          "name": "Line Regulation (Note 3), TA = +25°C, 3.0 V ≤ VI−VO ≤ 40 V",
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          "unit": "%/V",
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          "name": "Load Regulation (Note 3), VO ≤ 5.0 V",
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          "name": "Load Regulation (Note 3), VO ≥ 5.0 V",
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          "name": "Thermal Regulation, 20 ms Pulse",
          "symbol": "Regtherm",
          "kind": "thermal",
          "unit": "% VO/W",
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          "typ": 0.03,
          "max": 0.07,
          "conditions": "TA = +25°C (Note 4), 20 ms Pulse",
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        },
        {
          "name": "Adjustment Pin Current",
          "symbol": "IAdj",
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          "unit": "µA",
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          "name": "Adjustment Pin Current Change",
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          "conditions": "2.5 V ≤ VI−VO ≤ 40 V, 10 mA ≤ IL ≤ Imax, PD ≤ Pmax",
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        },
        {
          "name": "Reference Voltage",
          "symbol": "Vref",
          "kind": "electrical",
          "unit": "V",
          "min": 1.2,
          "typ": 1.25,
          "max": 1.3,
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          "name": "Load Regulation (Note 3), VO ≤ 5.0 V",
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          "name": "Load Regulation (Note 3), VO ≥ 5.0 V",
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          "typ": 0.3,
          "max": 1.5,
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        },
        {
          "name": "Minimum Load Current to Maintain Regulation",
          "symbol": "ILmin",
          "kind": "electrical",
          "unit": "mA",
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          "typ": 3.5,
          "max": 10,
          "conditions": "VI−VO = 40 V",
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        },
        {
          "name": "Maximum Output Current",
          "symbol": "Imax",
          "kind": "electrical",
          "unit": "A",
          "min": 1.5,
          "typ": 2.2,
          "max": null,
          "conditions": "VI−VO ≤ 15 V, PD ≤ Pmax, T Package",
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        {
          "name": "Maximum Output Current",
          "symbol": "Imax",
          "kind": "electrical",
          "unit": "A",
          "min": 0.15,
          "typ": 0.4,
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          "conditions": "VI−VO = 40 V, PD ≤ Pmax, TA = +25°C, T Package",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Long-Term Stability",
          "symbol": "S",
          "kind": "electrical",
          "unit": "%/1.0 kHrs.",
          "min": null,
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          "max": 1,
          "conditions": "TJ = Thigh (Note 7), TA = +25°C for Endpoint Measurements",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Input-Output Voltage Differential",
          "symbol": "VI−VO",
          "kind": "absolute_maximum",
          "unit": "Vdc",
          "min": -0.3,
          "typ": null,
          "max": 40,
          "conditions": "",
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        {
          "name": "Thermal Resistance, Junction-to-Ambient (Case 936, D2PAK-3)",
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          "name": "Operating Junction Temperature Range",
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          "name": "Storage Temperature Range",
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