LM317D2T-TR

{
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  "slug": "lm317d2t-tr",
  "title": "LM317D2T-TR",
  "brief": "STMicroelectronics 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",
  "license": "CC-BY-SA-4.0",
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  "component": {
    "mpn": "LM317D2T-TR",
    "manufacturer": "STMicroelectronics",
    "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/8586202517663727616",
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    "pins": [
      {
        "number": "1",
        "name": "ADJUST",
        "type": "bidirectional",
        "description": "Adjustment terminal that sets the constant 1.25 V reference across external resistor R1; draws a typical 50 µA (max 100 µA) adjustment-pin current with only 0.2-5 µA change over line/load, used with an external resistor divider to program VO = VREF(1+R2/R1) + IADJ·R2."
      },
      {
        "number": "2",
        "name": "OUTPUT",
        "type": "power_out",
        "description": "Regulated output terminal, internally referenced 1.25 V (1.2-1.3 V typ) above the ADJUST pin; delivers output current in excess of 1.5 A (up to 2.2 A max for VI-VO ≤15 V) and is electrically the same net as the package tab used for heat-sinking."
      },
      {
        "number": "3",
        "name": "INPUT",
        "type": "power_in",
        "description": "Unregulated input supply terminal; the input-to-output differential voltage (VI-VO) must not exceed the 40 V absolute maximum rating, with electrical characteristics specified at VI-VO = 5 V and a 2.5-40 V operating differential range."
      }
    ],
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        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Figure 1 (page 3) shows the D²PAK pin diagram only with pin NAMES (INPUT, OUTPUT, ADJUST) and the ta; Electrical characteristics tables (pages 7-8) describe VREF as measured 'between pin 3 and pin 1' fo",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 25,
        "cost_usd": 0.548,
        "at": "2026-09-23T00:59:41"
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        "pages": 25,
        "sha256": "6c20f995e97f5cb4",
        "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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    },
    "viewers": {
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        "seat": "z = 0",
        "extents_mm": [
          15.0,
          10.0,
          4.42
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        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "804a3f76e4182a02567b2429bdc9a585b857158fb8543fccd29c8eb6780e1310",
        "checked": "2026-10-07",
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        "checked": "2026-10-16",
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "TO-263-2",
      "Category": "Power Management (PMIC)",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "6c20f995e97f5cb4",
      "rows": [
        {
          "name": "Line regulation",
          "symbol": "ΔVO",
          "kind": "electrical",
          "unit": "%/V",
          "min": null,
          "typ": 0.01,
          "max": 0.04,
          "conditions": "VI - VO = 3 to 40 V, TJ = 25°C",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Line regulation",
          "symbol": "ΔVO",
          "kind": "electrical",
          "unit": "%/V",
          "min": null,
          "typ": 0.02,
          "max": 0.07,
          "conditions": "VI - VO = 3 to 40 V",
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          "source": "datasheet"
        },
        {
          "name": "Load regulation (VO ≤ 5 V)",
          "symbol": "ΔVO",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 5,
          "max": 25,
          "conditions": "VO ≤ 5 V, IO = 10 mA to IMAX, TJ = 25°C",
          "source_page": 7,
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        },
        {
          "name": "Load regulation (VO ≤ 5 V)",
          "symbol": "ΔVO",
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          "unit": "mV",
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          "typ": 20,
          "max": 70,
          "conditions": "VO ≤ 5 V, IO = 10 mA to IMAX",
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        },
        {
          "name": "Load regulation (VO ≥ 5 V)",
          "symbol": "ΔVO",
          "kind": "electrical",
          "unit": "%",
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          "typ": 0.1,
          "max": 0.5,
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        },
        {
          "name": "Load regulation (VO ≥ 5 V)",
          "symbol": "ΔVO",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.3,
          "max": 1.5,
          "conditions": "VO ≥ 5 V, IO = 10 mA to IMAX",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Adjustment pin current",
          "symbol": "IADJ",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 50,
          "max": 100,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Adjustment pin current change",
          "symbol": "ΔIADJ",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.2,
          "max": 5,
          "conditions": "VI - VO = 2.5 to 40 V, IO = 10 mA to 500 mA",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Reference voltage (between pin 3 and pin 1)",
          "symbol": "VREF",
          "kind": "electrical",
          "unit": "V",
          "min": 1.2,
          "typ": 1.25,
          "max": 1.3,
          "conditions": "VI - VO = 2.5 to 40 V, IO = 10 mA to 500 mA, PD ≤ PMAX",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Output voltage temperature stability",
          "symbol": "ΔVO/VO",
          "kind": "temperature_coefficient",
          "unit": "%",
          "min": null,
          "typ": 1,
          "max": null,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Minimum load current",
          "symbol": "IO(min)",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 3.5,
          "max": 10,
          "conditions": "VI - VO = 40 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Maximum load current",
          "symbol": "IO(max)",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 1.5,
          "max": 2.2,
          "conditions": "VI - VO ≤ 15 V, PD < PMAX",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Maximum load current",
          "symbol": "IO(max)",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 0.4,
          "max": null,
          "conditions": "VI - VO = 40 V, PD < PMAX, TJ = 25°C",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Output noise voltage (percentage of VO)",
          "symbol": "eN",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.003,
          "max": null,
          "conditions": "B = 10 Hz to 100 kHz, TJ = 25°C",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage rejection (CADJ = 0)",
          "symbol": "SVR",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": 65,
          "max": null,
          "conditions": "TJ = 25°C, f = 120 Hz, CADJ = 0",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage rejection (CADJ = 10 µF)",
          "symbol": "SVR",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": 66,
          "max": 80,
          "conditions": "TJ = 25°C, f = 120 Hz, CADJ = 10 µF",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Input-reference differential voltage",
          "symbol": "VI - VO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "",
          "source_page": 4,
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        },
        {
          "name": "Operating junction temperature (LM317)",
          "symbol": "TOP",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": 0,
          "typ": null,
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          "conditions": "LM317 grade",
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        {
          "name": "Storage temperature",
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          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
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        },
        {
          "name": "Thermal resistance junction-case (D²PAK)",
          "symbol": "RthJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 3,
          "max": null,
          "conditions": "D²PAK package",
          "source_page": 4,
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        {
          "name": "Thermal resistance junction-ambient (D²PAK)",
          "symbol": "RthJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 62.5,
          "max": null,
          "conditions": "D²PAK package",
          "source_page": 4,
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  "updated_at": "2026-09-28T16:33:17.737Z"
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