BL1117-ADJCY

{
  "schema_version": 1,
  "type": "component",
  "slug": "bl1117-adjcy",
  "title": "BL1117-ADJCY",
  "brief": "BL Shanghai Belling Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "pmic",
    "bl1117-adjcy"
  ],
  "component": {
    "mpn": "BL1117-ADJCY",
    "manufacturer": "BL Shanghai Belling",
    "package": "TO-252-2",
    "pin_count": 3,
    "category": "PMIC",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2205171716_BL-Shanghai-Belling-BL1117-ADJCY_C2763862.pdf",
    "parts": {
      "symbol": "bl1117-adjcy.kicad_sym",
      "footprint": "bl1117-adjcy.kicad_mod",
      "model_3d": "bl1117-adjcy-etched.glb",
      "model_3d_plain": "bl1117-adjcy.glb",
      "model_3d_step": "bl1117-adjcy-etched.step",
      "model_3d_step_plain": "bl1117-adjcy.step",
      "lbr": "bl1117-adjcy.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "Adj",
        "type": "input",
        "description": "Adjust pin. Feedback input regulated to 1.25 V (Vref) reference. Output voltage set by Vout = 1.25 x (1 + R2/R1) + IAdj x R2 using external resistor divider (R1 recommended <=125 ohm to meet minimum load, and <=625 ohm for stability). IAdj is typically 55 uA (max 120 uA)."
      },
      {
        "number": "2",
        "name": "Vout",
        "type": "power_out",
        "description": "Regulated output. Delivers up to 1 A. Requires a 10 uF tantalum or MLCC output capacitor for stability (ESR 3 mOhm to 22 Ohm). On TO-252 the exposed tab is electrically the Vout pin."
      },
      {
        "number": "3",
        "name": "Vin",
        "type": "power_in",
        "description": "Unregulated supply input. Recommended operating range up to 12 V (absolute max 15 V). Requires a 10 uF tantalum or MLCC bypass capacitor. Must exceed Vout by at least the dropout voltage (~1.3 V at 1 A)."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2205171716_BL-Shanghai-Belling-BL1117-ADJCY_C2763862.pdf",
        "pages": 15,
        "sha256": "a7fe7f5c0846d4ca",
        "source_tier": "lcsc"
      },
      "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": "bl1117-adjcy.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          9.9,
          6.5,
          2.32
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "3eb4c99603a4fe837c2fe9308bc174769ded87a785a0df48d2dc441432ee8b4c",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bl1117-adjcy-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          9.9,
          6.5,
          2.32
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "03027a317204049a71b49b2fc62ef2a8d5a4dfadf22dce6a0eddd158ebec69a2",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "BL Shanghai Belling",
      "Package": "TO-252-2",
      "Category": "PMIC",
      "Pins": "3"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "a7fe7f5c0846d4ca",
      "rows": [
        {
          "name": "Reference Voltage (BL1117-ADJ)",
          "symbol": "Vref",
          "kind": "electrical",
          "unit": "V",
          "min": 1.225,
          "typ": 1.25,
          "max": 1.275,
          "conditions": "10mA≤Iout≤1A, Vin=3.25V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation (BL1117-ADJ)",
          "symbol": "ΔVout",
          "kind": "electrical",
          "unit": "%/V",
          "min": null,
          "typ": 0.1,
          "max": 0.2,
          "conditions": "Iout=10mA, 2.75V≤Vin≤12V",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation (BL1117-ADJ)",
          "symbol": "ΔVout",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 10,
          "max": 30,
          "conditions": "Vin=2.75V, 10mA≤Iout≤1A",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage at 100mA",
          "symbol": "Vdrop",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.23,
          "max": 1.3,
          "conditions": "Iout=100mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Dropout Voltage at 1A",
          "symbol": "Vdrop",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.3,
          "max": 1.5,
          "conditions": "Iout=1A",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Current Limit",
          "symbol": "Ilimit",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 1,
          "max": null,
          "conditions": "Vin-Vout=2V, Tj=25°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage Rejection",
          "symbol": "SVR",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": 60,
          "max": null,
          "conditions": "f = 120Hz, VIN − VOUT = 3V + 1VPP Ripple",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Minimum Load Current (BL1117-ADJ)",
          "symbol": "Imin",
          "kind": "electrical",
          "unit": "mA",
          "min": 4,
          "typ": 6,
          "max": 10,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Adjust Pin Current (BL1117-ADJ)",
          "symbol": "IAdj",
          "kind": "electrical",
          "unit": "uA",
          "min": 35,
          "typ": 55,
          "max": 120,
          "conditions": "Vin =5V, 10mA≤Iout≤1A",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Adjust Pin Current Change (BL1117-ADJ)",
          "symbol": "Ichange",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": 0.2,
          "max": 10,
          "conditions": "Vin =5V, 10mA≤Iout≤1A",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Temperature Coefficient of Reference Voltage",
          "symbol": "ΔV/ΔT",
          "kind": "temperature_coefficient",
          "unit": "ppm",
          "min": -100,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage Range",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 12,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction Temperature",
          "symbol": "Tj",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -20,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Max Input Voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 15,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Max Operating Junction Temperature",
          "symbol": "Tj",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Ambient Temperature",
          "symbol": "Ta",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature",
          "symbol": "Ts",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Lead Temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "10 s",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance Junction-to-Case (TO-252)",
          "symbol": "JC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 10,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance Junction-to-Ambient (TO-252, no heat sink)",
          "symbol": "JA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 92,
          "max": null,
          "conditions": "No air flow, no heat sink",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [
    {
      "mpn": "BL1117-ADJCY",
      "kind": "packaging"
    },
    {
      "mpn": "BL1117-ADJCYADJAY",
      "kind": "packaging"
    },
    {
      "mpn": "BL1117-ADJCX",
      "kind": "unknown"
    },
    {
      "mpn": "BL1117-ADJCYADJAX",
      "kind": "packaging"
    }
  ],
  "sections": [
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    "viewers",
    "readme",
    "breadcrumbs",
    "info"
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  "discovery_triggers": [
    "bl1117-adjcy"
  ],
  "discovery_pitch": "BL1117-ADJCY (BL Shanghai Belling) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
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  "visibility": {
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  },
  "updated_at": "2026-09-24T17:46:48.008Z"
}