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Ray Set visibility: public c317ef7 5d ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "lt1521cst-5-pbf",
  "title": "LT1521CST-5#PBF",
  "brief": "Analog Devices Linear Voltage Regulators (LDO), SOT-223. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management ics",
    "lt1521cst-5#pbf",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "LT1521CST-5#PBF",
    "manufacturer": "Analog Devices",
    "package": "SOT-223",
    "pin_count": 3,
    "category": "Power Management ICs",
    "subcategory": "Linear Voltage Regulators (LDO)",
    "datasheet": "https://www.analog.com/media/en/technical-documentation/data-sheets/1521335fb.pdf",
    "parts": {
      "symbol": "lt1521cst-5-pbf.kicad_sym",
      "footprint": "lt1521cst-5-pbf.kicad_mod",
      "model_3d": "lt1521cst-5-pbf-hero.glb",
      "model_3d_plain": "lt1521cst-5-pbf-etched.glb",
      "model_3d_step": "lt1521cst-5-pbf-etched.step",
      "model_3d_step_plain": "lt1521cst-5-pbf.step",
      "lbr": "lt1521cst-5-pbf.lbr"
    },
    "distributor_links": {
      "lcsc": "C664161",
      "digikey": "LT1521CST-5#PBF-ND",
      "mouser": "584-LT1521CST-5#PBF"
    },
    "distributor_check": {
      "checked_at": "2026-11-02T17:47:16Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "LT1521CST-5#PBF-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "584-LT1521CST-5#PBF",
        "status": "found"
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    },
    "pins": [
      {
        "number": "1",
        "name": "IN",
        "type": "power_in",
        "description": "Regulator input supply; withstands reverse voltages of 20V without reverse current, and a 1µF to 10µF bypass capacitor is sufficient when the source is distant or battery-powered."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin, electrically common with the package tab which is also GND."
      },
      {
        "number": "3",
        "name": "OUT",
        "type": "power_out",
        "description": "Regulated 5V output supplying up to 300mA to the load, requiring a minimum output capacitor of 1.5µF to prevent oscillation."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The SOT-223 (ST) package has three leads and no SENSE pin, so the datasheet's pin-2 SENSE and ADJ de"
        ],
        "pages_sent": 16,
        "cost_usd": 0.0269,
        "at": "2026-11-02T17:47:04"
      },
      "datasheet": {
        "url": "https://www.analog.com/media/en/technical-documentation/data-sheets/1521335fb.pdf",
        "pages": 16,
        "sha256": "a580c39ec72785d9",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "lt1521cst-5-pbf.step",
        "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": "2026-11-02",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lt1521cst-5-pbf-etched.step",
        "role": "eda",
        "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": "1c70b08eae8df163ba6a8a191d91d74620bc65c4e0c3bbb88e3490d09e5773f2",
        "checked": "2026-11-02",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Analog Devices",
      "Package": "SOT-223",
      "Category": "Power Management ICs",
      "Pins": "3"
    },
    "appearance": {
      "contacts": {
        "quote": "3/32\" FR-4 board with one ounce copper. All NC leads were",
        "page": 10,
        "doc": "ds.pdf",
        "material": "copper"
      },
      "version": 1,
      "datasheet_sha256": "a580c39ec72785d9deec3be1c7c6a177c6a10ff892d3626d9823a1d64e26db62"
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    "characteristics": {
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      "source": "datasheet",
      "datasheet_sha256": "a580c39ec72785d9deec3be1c7c6a177c6a10ff892d3626d9823a1d64e26db62",
      "rows": [
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          "name": "Regulated Output Voltage LT1521-5 (VIN=5.5V, IOUT=1mA, TJ=25°C)",
          "symbol": "VOUT",
          "kind": "tolerance",
          "unit": "V",
          "min": 4.925,
          "typ": 5,
          "max": 5.075,
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          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Regulated Output Voltage LT1521-5 (6V<VIN<20V, 1mA<IOUT<300mA)",
          "symbol": "VOUT",
          "kind": "tolerance",
          "unit": "V",
          "min": 4.85,
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          "max": 5.15,
          "conditions": "6V < VIN < 20V, 1mA < IOUT < 300mA, over operating temperature range",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation LT1521-5",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 1.5,
          "max": 20,
          "conditions": "ΔVIN = 5.5 to 20V, IOUT = 1mA, over operating temperature range",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation LT1521-5 (TJ ≤ 25°C)",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": -25,
          "max": -45,
          "conditions": "ΔILOAD = 1mA to 300mA, TJ ≤ 25°C",
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        {
          "name": "Load Regulation LT1521-5 (TJ > 25°C)",
          "symbol": "",
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          "unit": "mV",
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          "source_page": 3,
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        },
        {
          "name": "Dropout Voltage",
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          "name": "Dropout Voltage",
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        {
          "name": "Dropout Voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
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          "max": 350,
          "conditions": "ILOAD = 50mA, TJ = 25°C",
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        {
          "name": "Dropout Voltage",
          "symbol": "",
          "kind": "electrical",
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          "min": null,
          "typ": null,
          "max": 450,
          "conditions": "ILOAD = 50mA, over operating temperature range",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 350,
          "max": 420,
          "conditions": "ILOAD = 100mA, TJ = 25°C",
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        },
        {
          "name": "Dropout Voltage",
          "symbol": "",
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          "min": null,
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          "conditions": "ILOAD = 100mA, over operating temperature range",
          "source_page": 3,
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        {
          "name": "Dropout Voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
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          "max": 470,
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          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 600,
          "conditions": "ILOAD = 150mA, over operating temperature range",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 500,
          "max": 600,
          "conditions": "ILOAD = 300mA, TJ = 25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 750,
          "conditions": "ILOAD = 300mA, over operating temperature range",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Ground Pin Current",
          "symbol": "",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 12,
          "max": 25,
          "conditions": "ILOAD = 0mA, over operating temperature range",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Ground Pin Current",
          "symbol": "",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 65,
          "max": 100,
          "conditions": "ILOAD = 1mA, over operating temperature range",
          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "Ground Pin Current",
          "symbol": "",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 300,
          "max": 450,
          "conditions": "ILOAD = 10mA, over operating temperature range",
          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "Ground Pin Current",
          "symbol": "",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.8,
          "max": 1.5,
          "conditions": "ILOAD = 50mA, over operating temperature range",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Ground Pin Current",
          "symbol": "",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1.4,
          "max": 2.5,
          "conditions": "ILOAD = 100mA, over operating temperature range",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Ground Pin Current",
          "symbol": "",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 2.2,
          "max": 4,
          "conditions": "ILOAD = 150mA, over operating temperature range",
          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "Ground Pin Current",
          "symbol": "",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 6.5,
          "max": 12,
          "conditions": "ILOAD = 300mA, over operating temperature range",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Shutdown Threshold (Off to On)",
          "symbol": "VSHDN",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.2,
          "max": 2.8,
          "conditions": "VOUT = Off to On, over operating temperature range",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Shutdown Threshold (On to Off)",
          "symbol": "VSHDN",
          "kind": "electrical",
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          "min": null,
          "typ": 0.25,
          "max": 0.75,
          "conditions": "VOUT = On to Off, over operating temperature range",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Shutdown Pin Current",
          "symbol": "ISHDN",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 2,
          "max": 5,
          "conditions": "VSHDN = 0V, over operating temperature range",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Current in Shutdown",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 6,
          "max": 12,
          "conditions": "VIN = VOUT(NOMINAL) + 1V, VSHDN = 0V, over operating temperature range",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Ripple Rejection",
          "symbol": "",
          "kind": "electrical",
          "unit": "dB",
          "min": 50,
          "typ": 58,
          "max": null,
          "conditions": "VIN – VOUT = 1V(Avg), VRIPPLE = 0.5VP–P, fRIPPLE = 120Hz, ILOAD = 150mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Current Limit",
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          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 400,
          "max": 800,
          "conditions": "VIN – VOUT = 7V, TJ = 25°C",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Current Limit",
          "symbol": "",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 320,
          "max": 400,
          "conditions": "VIN = VOUT(NOMINAL) + 1.5V, ΔVOUT = –0.1V, over operating temperature range",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Reverse Leakage Current",
          "symbol": "",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "VIN = –20V, VOUT = 0V, over operating temperature range",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Reverse Output Current LT1521-5",
          "symbol": "",
          "kind": "electrical",
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          "min": null,
          "typ": 5,
          "max": 10,
          "conditions": "VOUT = 5V, VIN < 5V, TJ = 25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage",
          "symbol": "VIN",
          "kind": "absolute_maximum",
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          "min": -20,
          "typ": null,
          "max": 20,
          "conditions": "Absolute maximum rating ±20V (higher ratings require factory contact)",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Output Pin Reverse Current",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
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          "max": 10,
          "conditions": "Absolute maximum rating",
          "source_page": 2,
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        {
          "name": "Shutdown Pin Input Voltage",
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          "source_page": 2,
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        {
          "name": "Shutdown Pin Input Current",
          "symbol": "",
          "kind": "absolute_maximum",
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          "name": "Storage Temperature Range",
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          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "Absolute maximum rating",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Lead Temperature (Soldering, 10 sec)",
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          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "Soldering, 10 sec",
          "source_page": 2,
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        },
        {
          "name": "Operating Junction Temperature Range (Commercial)",
          "symbol": "TJ",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": 0,
          "typ": null,
          "max": 125,
          "conditions": "Commercial grade (LT1521CST-5); Note 2",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Maximum Junction Temperature",
          "symbol": "TJMAX",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 125,
          "conditions": "SOT-223 (ST) package",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance Junction-to-Ambient (SOT-223 header)",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 50,
          "max": null,
          "conditions": "SOT-223 (ST) package, header value",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance Junction-to-Tab (SOT-223)",
          "symbol": "θJ-TAB",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 20,
          "max": null,
          "conditions": "SOT-223 package, junction-to-tab",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance Junction-to-Ambient (SOT-223)",
          "symbol": "θJA",
          "kind": "thermal",
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          "min": null,
          "typ": 50,
          "max": null,
          "conditions": "2500mm2 topside, 2500mm2 backside, 2500mm2 board area",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance Junction-to-Ambient (SOT-223)",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 58,
          "max": null,
          "conditions": "225mm2 topside, 2500mm2 backside, 2500mm2 board area",
          "source_page": 11,
          "source": "datasheet"
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