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Ray Set visibility: public 6757bc0 5d ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "a8450klbtr-t",
  "title": "A8450KLBTR-T",
  "brief": "Allegro MicroSystems, LLC AC-DC Controllers & Regulators, SOIC-24-300mil. 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 supply chip",
    "a8450klbtr-t",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "A8450KLBTR-T",
    "manufacturer": "Allegro MicroSystems, LLC",
    "package": "SOIC-24-300mil",
    "pin_count": 24,
    "category": "Power Supply Chip",
    "subcategory": "AC-DC Controllers & Regulators",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/cfdd7e24e89a746c731588a0db25feae.pdf",
    "parts": {
      "symbol": "a8450klbtr-t.kicad_sym",
      "footprint": "a8450klbtr-t.kicad_mod",
      "model_3d": "a8450klbtr-t-hero.glb",
      "model_3d_plain": "a8450klbtr-t-etched.glb",
      "model_3d_step": "a8450klbtr-t-etched.step",
      "model_3d_step_plain": "a8450klbtr-t.step",
      "lbr": "a8450klbtr-t.lbr"
    },
    "distributor_links": {
      "lcsc": "C2650297",
      "digikey": "620-A8450KLBTR-TTR-ND",
      "mouser": "250-A8450KLBTR-T"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T15:53:55Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "620-A8450KLBTR-TTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "250-A8450KLBTR-T",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VBB",
        "type": "power_in",
        "description": "Load supply input; the electrical characteristics specify operation from 6 to 45 V with an absolute maximum rating of -40 V."
      },
      {
        "number": "2",
        "name": "CP2",
        "type": "passive",
        "description": "Charge pump capacitor positive side, connected to CP1 through a 0.1 µF ceramic capacitor (C8)."
      },
      {
        "number": "3",
        "name": "CP1",
        "type": "passive",
        "description": "Charge pump capacitor negative side, connected to CP2 through a 0.1 µF ceramic capacitor (C8)."
      },
      {
        "number": "4",
        "name": "VCP",
        "type": "power_out",
        "description": "Charge pump output driving the N-channel buck switch; a 0.1 µF ceramic capacitor (C7) connects between VCP and VBB."
      },
      {
        "number": "5",
        "name": "VREG11",
        "type": "passive",
        "description": "Internal reference pin; the datasheet specifies no external connection for it."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Power ground; internally fused ground lead for enhanced thermal dissipation."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Power ground; internally fused ground lead for enhanced thermal dissipation."
      },
      {
        "number": "8",
        "name": "ENB",
        "type": "input",
        "description": "Logic-level enable input; HIGH input level 2.7 to 6.5 V, LOW input level -0.3 to 0.8 V."
      },
      {
        "number": "9",
        "name": "CPOR",
        "type": "passive",
        "description": "POR delay adjustment pin; external capacitor C9 sets tPOR using tPOR = 2.13×105 × CCPOR (ms, µF)."
      },
      {
        "number": "10",
        "name": "CLADJ",
        "type": "passive",
        "description": "Current limit pin for the adjustable regulator; it should be shorted to VREG if current limiting is not needed."
      },
      {
        "number": "11",
        "name": "VADJBD",
        "type": "output",
        "description": "Base drive output for the adjustable regulator pass transistor, with base drive current of 5.0 to 16.0 mA."
      },
      {
        "number": "12",
        "name": "FB",
        "type": "input",
        "description": "Feedback input for the adjustable regulator; feedback voltage VFB is 1.16 to 1.24 V."
      },
      {
        "number": "13",
        "name": "V5A",
        "type": "power_out",
        "description": "5 V analog regulator output of 200 mA, protected against short to supply; output voltage 4.9 to 5.1 V."
      },
      {
        "number": "14",
        "name": "NPOR",
        "type": "output",
        "description": "Open-drain power-on-reset output that signals a POR event, with output voltage at most 400 mV when asserted."
      },
      {
        "number": "15",
        "name": "NFAULT",
        "type": "output",
        "description": "Open-drain diagnostic output, pulled low during fault conditions."
      },
      {
        "number": "16",
        "name": "V5D",
        "type": "power_out",
        "description": "5 V digital regulator output of 200 mA; output voltage 4.9 to 5.1 V."
      },
      {
        "number": "17",
        "name": "VREG",
        "type": "power_out",
        "description": "DC-to-DC converter output that supplies the linear regulators; regulated output voltage is 5.50 to 5.80 V."
      },
      {
        "number": "18",
        "name": "GND",
        "type": "power_in",
        "description": "Power ground; internally fused ground lead for enhanced thermal dissipation."
      },
      {
        "number": "19",
        "name": "GND",
        "type": "power_in",
        "description": "Power ground; internally fused ground lead for enhanced thermal dissipation."
      },
      {
        "number": "20",
        "name": "CL33",
        "type": "passive",
        "description": "Current limit pin for the 3.3 V regulator, set by resistor R3; it should be shorted to VREG if current limiting is not needed."
      },
      {
        "number": "21",
        "name": "V33BD",
        "type": "output",
        "description": "Base drive output for the 3.3 V regulator pass transistor."
      },
      {
        "number": "22",
        "name": "V33",
        "type": "power_out",
        "description": "3.3 V linear regulator output; output voltage 3.234 to 3.366 V."
      },
      {
        "number": "23",
        "name": "ENBAT",
        "type": "input",
        "description": "High-voltage enable input; HIGH input level 2.7 to 45 V, LOW input level -0.3 to 0.8 V."
      },
      {
        "number": "24",
        "name": "LX",
        "type": "output",
        "description": "Buck converter switching regulator output; LX voltage is rated -2 V to VBB."
      }
    ],
    "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 'Pinout Diagram' on page 15 lists pin labels out of order, so pin numbers were taken from the 'T"
        ],
        "pages_sent": 17,
        "cost_usd": 0.037,
        "at": "2026-10-28T15:53:14"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/cfdd7e24e89a746c731588a0db25feae.pdf",
        "pages": 17,
        "sha256": "e189a1ed6c573955",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 24,
        "described": 24,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "a8450klbtr-t.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          10.3,
          15.4,
          2.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "4b0d20f82f5b0124fecfe11c941274a3c865a30f7baee8b8fadd7df55972d4cd",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "a8450klbtr-t-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          10.3,
          15.4,
          2.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3edcccff290a23b9d7b35393e3222e6ffe6628628a0b14a37c61477794781d39",
        "checked": "2026-10-28",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Allegro MicroSystems, LLC",
      "Package": "SOIC-24-300mil",
      "Category": "Power Supply Chip",
      "Pins": "24"
    },
    "appearance": {
      "contacts": {
        "quote": "board (see chart on p. 5). The lead (Pb) free version has 100% matte tin leadframe plating.",
        "page": 2,
        "doc": "ds.pdf",
        "plating": "tin"
      },
      "version": 1,
      "datasheet_sha256": "e189a1ed6c57395586f040c2f9a7ce0cd8f8f56af67051fabf58fee754f1651b"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "e189a1ed6c57395586f040c2f9a7ce0cd8f8f56af67051fabf58fee754f1651b",
      "rows": [
        {
          "name": "Operating Temperature Range",
          "symbol": "TA",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 135,
          "conditions": "K range",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature",
          "symbol": "TJ(max)",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -55,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Load Supply Voltage",
          "symbol": "VBB",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -40,
          "typ": null,
          "max": null,
          "conditions": "VBB pin; printed as '– 40 V'",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Analog Output",
          "symbol": "V5A",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -1,
          "typ": null,
          "max": 45,
          "conditions": "V5A pin",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Signal ENBAT",
          "symbol": "VENBAT",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 45,
          "conditions": "ENBAT pin input",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Signal ENB",
          "symbol": "VENB",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6.5,
          "conditions": "ENB pin input",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "LX Voltage",
          "symbol": "VLX",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -2,
          "typ": null,
          "max": null,
          "conditions": "LX pin; upper limit is VBB",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal resistance junction to ambient",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 35,
          "max": null,
          "conditions": "4-layer board, JEDEC high-conductance PCB",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Input supply range",
          "symbol": "VBB",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 6,
          "typ": null,
          "max": 45,
          "conditions": "Electrical characteristics range, VENB = 5 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Regulated Output Voltage",
          "symbol": "VREG",
          "kind": "electrical",
          "unit": "V",
          "min": 5.5,
          "typ": null,
          "max": 5.8,
          "conditions": "ILOAD = 550 mA; VBB > 6.5 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Dropout Regulated Output Voltage",
          "symbol": "VREG",
          "kind": "electrical",
          "unit": "V",
          "min": 5,
          "typ": null,
          "max": 5.8,
          "conditions": "Dropout: 6 V ≤ VBB < 6.5 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Buck Switch Current Limit",
          "symbol": "IDSLIM",
          "kind": "electrical",
          "unit": "A",
          "min": 1,
          "typ": 1.2,
          "max": 2.2,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Buck Switch On-Resistance",
          "symbol": "RDSON",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 415,
          "max": 500,
          "conditions": "TJ = 25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Buck Switch On-Resistance",
          "symbol": "RDSON",
          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 650,
          "max": 750,
          "conditions": "TJ = 135°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Soft Start Time",
          "symbol": "tSS",
          "kind": "electrical",
          "unit": "ms",
          "min": 5,
          "typ": 10,
          "max": 15,
          "conditions": "VBB = 14 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Supply Quiescent Current, enabled",
          "symbol": "IBB",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 6,
          "max": 10,
          "conditions": "Enabled mode: VENBAT or VENB = HIGH, IOUT = 0 mA; VBB = 14 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Supply Quiescent Current, enabled",
          "symbol": "IBB",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 10,
          "max": 15,
          "conditions": "Enabled mode: VENBAT or VENB = HIGH, IOUT = 0 mA; VBB = 6 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Supply Quiescent Current, disabled",
          "symbol": "IBB",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "Disabled mode: VENBAT and VENB = LOW",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "ENBAT Logic Input Voltage HIGH",
          "symbol": "VENBAT",
          "kind": "electrical",
          "unit": "V",
          "min": 2.7,
          "typ": null,
          "max": 45,
          "conditions": "HIGH input level",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "ENBAT Logic Input Voltage LOW",
          "symbol": "VENBAT",
          "kind": "electrical",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 0.8,
          "conditions": "LOW input level",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "ENBAT Input Current HIGH",
          "symbol": "IENBAT",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 300,
          "conditions": "HIGH input level, VENBAT = 45 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "ENBAT Input Current HIGH",
          "symbol": "IENBAT",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 70,
          "conditions": "HIGH input level, VENBAT = 14 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "ENBAT Input Current LOW",
          "symbol": "IENBAT",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": null,
          "max": 10,
          "conditions": "LOW input level, VENBAT = 0.8 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "ENB Logic Input Voltage HIGH",
          "symbol": "VENB",
          "kind": "electrical",
          "unit": "V",
          "min": 2.7,
          "typ": null,
          "max": 6.5,
          "conditions": "HIGH input level",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "ENB Logic Input Voltage LOW",
          "symbol": "VENB",
          "kind": "electrical",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 0.8,
          "conditions": "LOW input level",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "ENB Input Current HIGH",
          "symbol": "IENB",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "HIGH input level, VENB ≥ 2.7 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "ENB Input Current LOW",
          "symbol": "IENB",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": null,
          "max": 10,
          "conditions": "LOW input level, VENB ≤ 0.8 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "V5D Output Voltage",
          "symbol": "VOUTV5D",
          "kind": "electrical",
          "unit": "V",
          "min": 4.9,
          "typ": 5,
          "max": 5.1,
          "conditions": "1 mA ≤ ILOADV5D ≤ 200 mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "V5A Output Voltage",
          "symbol": "VOUTV5A",
          "kind": "electrical",
          "unit": "V",
          "min": 4.9,
          "typ": 5,
          "max": 5.1,
          "conditions": "1 mA ≤ ILOADV5A ≤ 200 mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "V33 Output Voltage",
          "symbol": "VOUTV33",
          "kind": "electrical",
          "unit": "V",
          "min": 3.234,
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