LT3439EFE#PBF

{
  "slug": "lt3439efe-pbf",
  "version": "0.1.0",
  "type": "component",
  "description": "Analog Devices DC-DC Converters, TSSOP-16-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management ics",
    "lt3439efe#pbf",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lt3439efe-pbf.kicad_sym",
    "lt3439efe-pbf.kicad_mod",
    "lt3439efe-pbf.glb",
    "lt3439efe-pbf.step",
    "lt3439efe-pbf.lbr",
    "docs/hero.png",
    "docs/lt3439efe-pbf-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lt3439efe-pbf-hero.glb",
    "lt3439efe-pbf-hero.overlay.json",
    "lt3439efe-pbf-etched.glb"
  ],
  "component": {
    "mpn": "LT3439EFE#PBF",
    "manufacturer": "Analog Devices",
    "package": "TSSOP-16-EP",
    "pin_count": 17,
    "category": "Power Management ICs",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.analog.com/media/en/technical-documentation/data-sheets/lt3439.pdf",
    "parts": {
      "symbol": "lt3439efe-pbf.kicad_sym",
      "footprint": "lt3439efe-pbf.kicad_mod",
      "model_3d": "lt3439efe-pbf-hero.glb",
      "model_3d_plain": "lt3439efe-pbf-etched.glb",
      "model_3d_step": "lt3439efe-pbf-etched.step",
      "model_3d_step_plain": "lt3439efe-pbf.step",
      "lbr": "lt3439efe-pbf.lbr"
    },
    "distributor_links": {
      "lcsc": "C580055",
      "digikey": "505-LT3439EFE#PBF-ND",
      "mouser": "584-LT3439EFE#PBF"
    },
    "distributor_check": {
      "checked_at": "2026-10-29T01:08:40Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "505-LT3439EFE#PBF-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "584-LT3439EFE#PBF",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground connected to the emitter of the power switches through an internal sense resistor; it carries large currents and should be tied to a good quality ground plane."
      },
      {
        "number": "2",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection; the datasheet pinout lists this pin as NC."
      },
      {
        "number": "3",
        "name": "COL A",
        "type": "output",
        "description": "Open-collector output of power switch A, connected to an outer terminal of the center-tapped transformer; keep traces short because of large currents, and COL A voltage is limited to 35V."
      },
      {
        "number": "4",
        "name": "RSL",
        "type": "passive",
        "description": "Slew control resistor that sets the maximum current and voltage slew rate of collectors A and B, with a minimum of 3.4k for fast slewing and a maximum of 34k for slow slewing."
      },
      {
        "number": "5",
        "name": "SYNC",
        "type": "input",
        "description": "Synchronizes the oscillator to an external clock with RT and CT set about 10% below the external clock frequency; tie to GND if unused, and SYNC voltage is limited to 20V."
      },
      {
        "number": "6",
        "name": "CT",
        "type": "passive",
        "description": "Oscillator capacitor pin that works with RT to set the oscillator frequency; for RT = 16.9k, CT(nF) = 70/fOSC(kHz)."
      },
      {
        "number": "7",
        "name": "RT",
        "type": "passive",
        "description": "Oscillator resistor pin that sets the oscillator capacitor charge and discharge currents; nominal value is 16.9k, adjustable within ±25% of nominal."
      },
      {
        "number": "8",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection; the datasheet pinout lists this pin as NC."
      },
      {
        "number": "9",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection; the datasheet pinout lists this pin as NC."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Signal ground for the oscillator, slew control circuitry and internal regulator; keep the connection free of large currents and tie it to the ground plane."
      },
      {
        "number": "11",
        "name": "SHDN",
        "type": "input",
        "description": "Shutdown pin where grounding disables the part and the turn-on threshold is about 1.3V; SHDN voltage is limited to 20V, and the pin may be left floating or tied to VIN if unused."
      },
      {
        "number": "12",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection; the datasheet pinout lists this pin as NC."
      },
      {
        "number": "13",
        "name": "VIN",
        "type": "power_in",
        "description": "Supply pin with an operating range of 2.8V to 17.5V and a 20V absolute maximum, to be bypassed with a 4.7µF or greater low ESR capacitor."
      },
      {
        "number": "14",
        "name": "COL B",
        "type": "output",
        "description": "Open-collector output of power switch B, connected to an outer terminal of the center-tapped transformer; keep traces short because of large currents, and COL B voltage is limited to 35V."
      },
      {
        "number": "15",
        "name": "NC",
        "type": "unconnected",
        "description": "No connection; the datasheet pinout lists this pin as NC."
      },
      {
        "number": "16",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground connected to the emitter of the power switches through an internal sense resistor; it carries large currents and should be tied to a good quality ground plane."
      },
      {
        "number": "17",
        "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 exposed backside pad of the TSSOP-EP is connected to GND according to the datasheet, but the dat; The TOP VIEW text extraction is scrambled. Pin numbers were assigned from the Pin Functions section ; The datasheet gives two different VIN undervoltage thresholds: the VIN pin description says 2.5V, wh",
          "exposed pad 17 added from the footprint"
        ],
        "pages_sent": 13,
        "cost_usd": 0.085,
        "at": "2026-10-29T01:08:26"
      },
      "datasheet": {
        "url": "https://www.analog.com/media/en/technical-documentation/data-sheets/lt3439.pdf",
        "pages": 13,
        "sha256": "ff87a40419427e18",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 17,
        "described": 17,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "lt3439efe-pbf.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          5.0,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "7982746831c0bd23f4690608869ad67776faae5c762fb0376666126a3998921b",
        "checked": "2026-10-29",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lt3439efe-pbf-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          5.0,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "2013bb273f87edadd12b81847a1bdd9f0d8df67e256cc0f12d8433b983168ae1",
        "checked": "2026-10-29",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "FE16 (BA)",
      "source_page": 11,
      "D": {
        "nom_mm": 5.0,
        "range_mm": [
          4.9,
          5.1
        ]
      },
      "E1": {
        "nom_mm": 4.4,
        "range_mm": [
          4.3,
          4.5
        ]
      },
      "E": {
        "nom_mm": 6.4,
        "range_mm": [
          null,
          null
        ]
      },
      "e": {
        "nom_mm": 0.65,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 1.1,
        "range_mm": [
          null,
          1.1
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "lt3439efe-pbf.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  }
}