LM2677S-5.0

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  "schema_version": 1,
  "type": "component",
  "slug": "lm2677s-5-0",
  "title": "LM2677S-5.0",
  "brief": "Texas Instruments DC-DC Converters, TO-263-7. 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 (pmic)",
    "lm2677s-5.0",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "LM2677S-5.0",
    "manufacturer": "Texas Instruments",
    "package": "TO-263-7",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm2677",
    "parts": {
      "symbol": "lm2677s-5-0.kicad_sym",
      "footprint": "lm2677s-5-0.kicad_mod",
      "model_3d": "lm2677s-5-0-hero.glb",
      "model_3d_plain": "lm2677s-5-0.glb",
      "model_3d_step": "lm2677s-5-0-etched.step",
      "model_3d_step_plain": "lm2677s-5-0.step",
      "lbr": "lm2677s-5-0.lbr"
    },
    "distributor_links": {
      "lcsc": "C2865692",
      "digikey": "LM2677S-5.0-ND",
      "mouser": "926-LM2677S-50"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T23:23:46Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "LM2677S-5.0-ND",
        "status": "found",
        "lifecycle": "Obsolete"
      },
      "mouser": {
        "pn": "926-LM2677S-50",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VSW",
        "type": "output",
        "description": "Source pin of the internal high-side FET and the switching node, to be connected to the inductor and the cathode of the external diode; the switch voltage to ground is limited to -1 V up to VIN (DC), with brief negative pulses per the absolute maximum footnote."
      },
      {
        "number": "2",
        "name": "VIN",
        "type": "power_in",
        "description": "Supply input to the collector of the high-side FET, which must connect to the power supply and input bypass capacitor CIN with the VIN-to-CIN-to-GND path kept as short as possible; the supply voltage range is 8 V to 40 V."
      },
      {
        "number": "3",
        "name": "CB",
        "type": "input",
        "description": "Boot-strap capacitor connection for the high-side driver, which requires a high quality 100-nF capacitor connected from CB to VSW."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Power ground pin to be connected to system ground, with the path to CIN kept as short as possible and the ground pins of CIN and COUT tied to it."
      },
      {
        "number": "5",
        "name": "SYNC",
        "type": "input",
        "description": "Allows control of the switching clock frequency within the 280 kHz to 400 kHz external sync range; if left open-circuited the regulator switches at the internal oscillator frequency, typically 260 kHz."
      },
      {
        "number": "6",
        "name": "FB",
        "type": "input",
        "description": "Feedback sense input, connected to the midpoint of the feedback divider to set VOUT for the ADJ version or directly to the output capacitor for fixed-output versions such as the 5.0 V part; the feedback pin voltage is rated -0.3 V to 14 V."
      },
      {
        "number": "7",
        "name": "ON/OFF",
        "type": "input",
        "description": "Enable input where high or floating enables the regulator and low disables it into the roughly 50 µA standby state; the pin voltage is rated -0.1 V to 6 V."
      },
      {
        "number": "8",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "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 TO-263 top-view diagram text in the extracted datasheet is garbled. The pin numbers and names we; The datasheet classifies VIN as I (input). It is typed power_in here because it is the main supply p; The datasheet gives no electrical specification fields for this request beyond the pin descriptions.",
          "exposed pad 8 added from the footprint"
        ],
        "pages_sent": 9,
        "cost_usd": 0.0623,
        "at": "2026-10-08T23:22:51"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm2677",
        "pages": 37,
        "sha256": "67567c9c5d763168",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "file": "lm2677s-5-0.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          15,
          10,
          4.42
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "34b8121b216e7b6490402befe573a69b06919acafd33d6e8da88bd238574da52",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm2677s-5-0-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          15.0,
          10.0,
          4.42
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "70f02eb2d995ab8bbfef1fc2828cbc861b7899a366098eeda790f0a93bdffcca",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "TO-263-7",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    }
  },
  "variants": [],
  "sections": [
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    "readme",
    "breadcrumbs",
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  "discovery_triggers": [
    "lm2677s-5.0"
  ],
  "discovery_pitch": "LM2677S-5.0 (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "lm2677s-5-0.step",
    "lm2677s-5-0.lbr",
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    "docs/lm2677s-5-0-datasheet.pdf",
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  "visibility": {
    "public": true
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}