LM2670SX-3.3

{
  "slug": "lm2670sx-3-3",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments DC-DC Converters, TO-263-7. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "lm2670sx-3.3",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
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    "README.md",
    "lm2670sx-3-3.kicad_sym",
    "lm2670sx-3-3.kicad_mod",
    "lm2670sx-3-3.glb",
    "lm2670sx-3-3.step",
    "lm2670sx-3-3.lbr",
    "docs/hero.png",
    "docs/lm2670sx-3-3-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lm2670sx-3-3-hero.glb",
    "lm2670sx-3-3-hero.overlay.json"
  ],
  "component": {
    "mpn": "LM2670SX-3.3",
    "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/lm2670",
    "parts": {
      "symbol": "lm2670sx-3-3.kicad_sym",
      "footprint": "lm2670sx-3-3.kicad_mod",
      "model_3d": "lm2670sx-3-3-hero.glb",
      "model_3d_plain": "lm2670sx-3-3.glb",
      "model_3d_step": "lm2670sx-3-3-etched.step",
      "model_3d_step_plain": "lm2670sx-3-3.step",
      "lbr": "lm2670sx-3-3.lbr"
    },
    "distributor_links": {
      "lcsc": "C2868446",
      "digikey": "LM2670SX-3.3-ND",
      "mouser": "926-LM2670SX-33"
    },
    "distributor_check": {
      "checked_at": "2026-10-08T16:47:55Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "LM2670SX-3.3-ND",
        "status": "found",
        "lifecycle": "Obsolete"
      },
      "mouser": {
        "pn": "926-LM2670SX-33",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "Switch_output",
        "type": "output",
        "description": "Source of the internal high-side FET and the switch node; connect to the inductor and the external Schottky diode cathode, with the ground-switch voltage limited to -1 V DC (short negative excursions to -10 V for 20 ns are allowed) and an absolute maximum of VIN."
      },
      {
        "number": "2",
        "name": "Input",
        "type": "input",
        "description": "Supply input connected to the high-side FET drain, which must be kept within 8 V to 40 V (absolute maximum 45 V) and bypassed by a capacitor placed close to this pin."
      },
      {
        "number": "3",
        "name": "CBOOST/CB",
        "type": "input",
        "description": "Bootstrap capacitor connection that is wired between this pin and the Switch_output pin to drive the internal MOSFET gate above VIN; the BOOST pin voltage is limited to VSW + 8 V."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Power ground pin connected to system ground, which must be kept as close as practical to the CIN and COUT ground returns."
      },
      {
        "number": "5",
        "name": "SYNC",
        "type": "input",
        "description": "Synchronization input for an external clock that must be higher than the internal oscillator frequency and lie in the 280 kHz to 400 kHz range; when left open the regulator switches at its internal 225 kHz to 280 kHz oscillator frequency."
      },
      {
        "number": "6",
        "name": "Feedback/FB",
        "type": "input",
        "description": "Feedback sense input that connects to the output for the fixed-output versions or to the midpoint of the feedback divider for the ADJ version, and it must be shielded from inductor flux coupling."
      },
      {
        "number": "7",
        "name": "ON/OFF",
        "type": "input",
        "description": "Enable input where a level above 1.4 V turns the regulator on and a level below 0.8 V shuts it down to a standby current of 50 µA, with a driven high level not to exceed the 6 V absolute maximum and the pin left open when unused."
      },
      {
        "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: Conflicting bootstrap capacitor value: Section 4 (Table 4-1) specifies a 100 nF capacitor between CB; The KTW (TO-263) drawing shows a thermal pad/tab that is not assigned a pin number. Table 4-1 states",
          "exposed pad 8 added from the footprint"
        ],
        "pages_sent": 20,
        "cost_usd": 0.1119,
        "at": "2026-10-08T16:47:37"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm2670",
        "pages": 42,
        "sha256": "0dc7dd45c243f2c8",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "34b8121b216e7b6490402befe573a69b06919acafd33d6e8da88bd238574da52",
        "checked": "2026-10-08",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lm2670sx-3-3-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": 0.0,
        "centre_offset_mm": 0.0,
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        "sha256": "a4ac6f19e938ad97d194194b05dcd586dbcb3c618db0d355a2e747b683d7cfad",
        "checked": "2026-10-08",
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  }
}