MCP1661T-E

{
  "schema_version": 1,
  "type": "component",
  "slug": "mcp1661t-e",
  "title": "MCP1661T-E",
  "brief": "Microchip Tech DC-DC Converters, SOT-23-5. 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",
    "mcp1661t-e",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "MCP1661T-E",
    "manufacturer": "Microchip Tech",
    "package": "SOT-23-5",
    "pin_count": 5,
    "category": "Power Management ICs",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/20005315B.pdf",
    "parts": {
      "symbol": "mcp1661t-e.kicad_sym",
      "footprint": "mcp1661t-e.kicad_mod",
      "model_3d": "mcp1661t-e-hero.glb",
      "model_3d_plain": "mcp1661t-e-etched.glb",
      "model_3d_step": "mcp1661t-e-etched.step",
      "model_3d_step_plain": "mcp1661t-e.step",
      "lbr": "mcp1661t-e.lbr"
    },
    "distributor_links": {
      "lcsc": "C511301"
    },
    "distributor_check": {
      "checked_at": "2026-10-23T02:58:27Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SW",
        "type": "passive",
        "description": "Switch node connecting the boost inductor to the internal N-channel switch drain, carrying inductor current up to 1.3A peak."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground return pin for circuit ground; keep traces from input and output capacitor returns to this pin as short as possible."
      },
      {
        "number": "3",
        "name": "VFB",
        "type": "input",
        "description": "Feedback voltage pin for output regulation via a resistor divider, with VFB typically 1.227V."
      },
      {
        "number": "4",
        "name": "EN",
        "type": "input",
        "description": "Logic-level enable input; logic high (>85% of VIN) enables the regulator and logic low (<7.5% of VIN) disables it and lowers quiescent current."
      },
      {
        "number": "5",
        "name": "VIN",
        "type": "power_in",
        "description": "Input voltage pin, to be decoupled from GND with a 4.7 µF minimum capacitor."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 7,
        "cost_usd": 0.0495,
        "at": "2026-10-23T02:58:04"
      },
      "datasheet": {
        "url": "https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/20005315B.pdf",
        "pages": 34,
        "sha256": "4ee52900f5f449c6",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 5,
        "described": 5,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "mcp1661t-e.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "720a6eab0024069bbee68e7cb4c3ff1149468a34611225cdc852662c5d0ec2b7",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mcp1661t-e-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "b7b4858a8dc4484afc8a61ff1beaf07079620ba78557f7586626c965df8b76fe",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Microchip Tech",
      "Package": "SOT-23-5",
      "Category": "Power Management ICs",
      "Pins": "5"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "4ee52900f5f449c6a9631c96a03e8c03fd7c7212947061afe9d0b0285b6ce9e0",
      "rows": [
        {
          "name": "Input Voltage Range",
          "symbol": "VIN",
          "kind": "electrical",
          "unit": "V",
          "min": 2.4,
          "typ": null,
          "max": 5.5,
          "conditions": "Note 1",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage Adjust Range",
          "symbol": "VOUT",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 32,
          "conditions": "Note 1",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Feedback Voltage",
          "symbol": "VFB",
          "kind": "electrical",
          "unit": "V",
          "min": 1.19,
          "typ": 1.227,
          "max": 1.264,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VFB Accuracy",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": -3,
          "typ": null,
          "max": 3,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Line Regulation",
          "symbol": "|(ΔVFB/VFB)/ΔVIN|",
          "kind": "electrical",
          "unit": "%/V",
          "min": null,
          "typ": 0.05,
          "max": 0.5,
          "conditions": "VIN = 3V to 5V, IOUT = 20 mA, VOUT = 12.0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "|ΔVFB/VFB|",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 0.5,
          "max": 1.5,
          "conditions": "IOUT = 20 mA to 100 mA, VIN = 3.3V, VOUT = 12.0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum Duty Cycle",
          "symbol": "DCMAX",
          "kind": "electrical",
          "unit": "%",
          "min": 88,
          "typ": 90,
          "max": null,
          "conditions": "Note 4",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Switching Frequency",
          "symbol": "fSW",
          "kind": "electrical",
          "unit": "kHz",
          "min": 425,
          "typ": 500,
          "max": 575,
          "conditions": "±15%",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "EN Input Logic High",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "% of VIN",
          "min": 85,
          "typ": null,
          "max": null,
          "conditions": "IOUT = 1 mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "EN Input Logic Low",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "% of VIN",
          "min": null,
          "typ": null,
          "max": 7.5,
          "conditions": "IOUT = 1 mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction Temperature Range",
          "symbol": "TJ",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "Steady State",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum Junction Temperature",
          "symbol": "TJ",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "Transient",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VSW – GND",
          "symbol": "VSW",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 36,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "EN, VIN – GND",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VFB",
          "symbol": "VFB",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.3,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Ambient Temperature with Power Applied",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating Junction Temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "ESD Protection HBM",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "kV",
          "min": null,
          "typ": null,
          "max": 4,
          "conditions": "All pins",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input Capacitor CIN",
          "symbol": "CIN",
          "kind": "recommended_operating",
          "unit": "µF",
          "min": 4.7,
          "typ": null,
          "max": null,
          "conditions": "Table 5-1",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "Output Capacitor COUT",
          "symbol": "COUT",
          "kind": "recommended_operating",
          "unit": "µF",
          "min": 10,
          "typ": null,
          "max": 47,
          "conditions": "Table 5-1",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "Inductance range",
          "symbol": "L",
          "kind": "recommended_operating",
          "unit": "µH",
          "min": 4.7,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "Thermal Resistance, 5LD-SOT-23",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 201,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "UVLO start",
          "symbol": "UVLOSTART",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 2.3,
          "max": null,
          "conditions": "VIN rising, IOUT = 1 mA resistive load",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "UVLO stop",
          "symbol": "UVLOSTOP",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.85,
          "max": null,
          "conditions": "VIN falling, IOUT = 1 mA resistive load",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Maximum Output Current",
          "symbol": "IOUT",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 125,
          "max": null,
          "conditions": "3.3V VIN, 12V VOUT",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Maximum Output Current",
          "symbol": "IOUT",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 200,
          "max": null,
          "conditions": "5.0V VIN, 12V VOUT",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Maximum Output Current",
          "symbol": "IOUT",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 100,
          "max": null,
          "conditions": "4.2V VIN, 24V VOUT",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Feedback Input Bias Current",
          "symbol": "IVFB",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.005,
          "max": null,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "No Load Input Current",
          "symbol": "IIN0",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 250,
          "max": null,
          "conditions": "Device switching, no load, 3.3V VIN, 12V VOUT (Note 2)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Shutdown Quiescent Current",
          "symbol": "IQSHDN",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 200,
          "max": null,
          "conditions": "EN = GND, feedback divider current not included (Note 3)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Peak Switch Current Limit",
          "symbol": "IN(MAX)",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 1.3,
          "max": null,
          "conditions": "Note 4",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "NMOS Switch Leakage",
          "symbol": "INLK",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.4,
          "max": null,
          "conditions": "VIN = VSW = 5V; VOUT = 5.5V, VEN = VFB = GND",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "NMOS Switch ON Resistance",
          "symbol": "RDS(ON)",
          "kind": "electrical",
          "unit": "Ω",
          "min": null,
          "typ": 0.8,
          "max": null,
          "conditions": "VIN = 5V, VOUT = 12V, IOUT = 100 mA (Note 4)",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Overvoltage Reference",
          "symbol": "OVP_REF",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 80,
          "max": null,
          "conditions": "VFB to GND transition (Note 4)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "EN Input Leakage Current",
          "symbol": "IENLK",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.025,
          "max": null,
          "conditions": "VEN = 5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Soft-Start Time",
          "symbol": "tSS",
          "kind": "timing",
          "unit": "ms",
          "min": null,
          "typ": 3,
          "max": null,
          "conditions": "TA, EN Low-to-High, 90% of VOUT",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Thermal Shutdown Die Temperature",
          "symbol": "TSD",
          "kind": "thermal",
          "unit": "°C",
          "min": null,
          "typ": 150,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Die Temperature Hysteresis",
          "symbol": "TSDHYS",
          "kind": "thermal",
          "unit": "°C",
          "min": null,
          "typ": 15,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "mcp1661t-e"
  ],
  "discovery_pitch": "MCP1661T-E (Microchip Tech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "mcp1661t-e.kicad_sym",
    "mcp1661t-e.kicad_mod",
    "mcp1661t-e.glb",
    "mcp1661t-e.step",
    "mcp1661t-e.lbr",
    "docs/hero.png",
    "docs/mcp1661t-e-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "mcp1661t-e-hero.glb",
    "mcp1661t-e-hero.overlay.json",
    "mcp1661t-e-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}