L7987

{
  "slug": "l7987",
  "version": "0.1.0",
  "type": "component",
  "description": "STMicroelectronics DC-DC Converters, HTSSOP-16-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "l7987",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "l7987.kicad_sym",
    "l7987.kicad_mod",
    "l7987.glb",
    "l7987.step",
    "l7987.lbr",
    "docs/hero.png",
    "docs/l7987-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "l7987-hero.glb",
    "l7987-hero.overlay.json",
    "l7987-etched.glb"
  ],
  "component": {
    "mpn": "L7987",
    "manufacturer": "STMicroelectronics",
    "package": "HTSSOP-16-EP",
    "pin_count": 17,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://www.st.com/resource/en/datasheet/l7987.pdf",
    "parts": {
      "symbol": "l7987.kicad_sym",
      "footprint": "l7987.kicad_mod",
      "model_3d": "l7987-hero.glb",
      "model_3d_plain": "l7987-etched.glb",
      "model_3d_step": "l7987-etched.step",
      "model_3d_step_plain": "l7987.step",
      "lbr": "l7987.lbr"
    },
    "distributor_links": {
      "lcsc": "C1355783",
      "digikey": "497-15197-ND",
      "mouser": "511-L7987"
    },
    "distributor_check": {
      "checked_at": "2026-11-05T23:21:36Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-15197-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "511-L7987",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VBIAS",
        "type": "input",
        "description": "VBIAS is an auxiliary input that supplies part of the analog circuitry to improve light-load efficiency, typically connected to the regulated output or to an external rail higher than 3 V, and must be connected to signal GND if unused."
      },
      {
        "number": "2",
        "name": "VIN",
        "type": "power_in",
        "description": "VIN is the DC input voltage pin, with an operating input voltage range of 4.5 V to 61 V."
      },
      {
        "number": "3",
        "name": "VIN",
        "type": "power_in",
        "description": "VIN is the DC input voltage pin, with an operating input voltage range of 4.5 V to 61 V."
      },
      {
        "number": "4",
        "name": "VCC",
        "type": "power_in",
        "description": "VCC is the filtered DC input voltage for the internal circuitry and must be bypassed to signal GND by a 1 µF ceramic capacitor."
      },
      {
        "number": "5",
        "name": "EN",
        "type": "input",
        "description": "EN is an active-high enable pin with device OFF level up to 0.30 V and device ON level from 0.35 V, and should be connected to VCC if not used."
      },
      {
        "number": "6",
        "name": "SS",
        "type": "passive",
        "description": "An internal current generator (5 µA typ.) charges the external capacitor to implement the soft-start."
      },
      {
        "number": "7",
        "name": "SYNCH",
        "type": "bidirectional",
        "description": "SYNCH is the master/slave synchronization pin, allowing multiple devices to be synchronized to prevent beating noise."
      },
      {
        "number": "8",
        "name": "COMP",
        "type": "output",
        "description": "COMP is the output of the error amplifier, where the designed compensation network is connected."
      },
      {
        "number": "9",
        "name": "FB",
        "type": "input",
        "description": "FB is the inverting input of the error amplifier, with a voltage feedback reference of 0.800 V typ."
      },
      {
        "number": "10",
        "name": "FSW",
        "type": "input",
        "description": "A pull-down resistor from FSW to GND selects the switching frequency, which is adjustable from 250 kHz to 1.5 MHz."
      },
      {
        "number": "11",
        "name": "ILIM",
        "type": "input",
        "description": "A pull-down resistor from ILIM to GND selects the peak current limitation."
      },
      {
        "number": "12",
        "name": "PGOOD",
        "type": "output",
        "description": "The PGOOD open collector output is driven low when the output voltage sensed on FB is out of regulation."
      },
      {
        "number": "13",
        "name": "LX",
        "type": "output",
        "description": "LX is the switching node of the regulator."
      },
      {
        "number": "14",
        "name": "LX",
        "type": "output",
        "description": "LX is the switching node of the regulator."
      },
      {
        "number": "15",
        "name": "BOOT",
        "type": "passive",
        "description": "An external capacitor (100 nF typ.) connected between BOOT and LX supplies the gate charge for the internal n-DMOS, recovered by an internal regulator during the off-time."
      },
      {
        "number": "16",
        "name": "GND",
        "type": "power_in",
        "description": "GND is the signal ground pin of the device."
      },
      {
        "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 pad (E.P.) is listed in Table 1 with no numeric pin number, so it is not included in the"
        ],
        "pages_sent": 12,
        "cost_usd": 0.0141,
        "at": "2026-11-05T23:21:21"
      },
      "datasheet": {
        "url": "https://www.st.com/resource/en/datasheet/l7987.pdf",
        "pages": 37,
        "sha256": "481abe81339105aa",
        "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": "l7987.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": "2026-11-05",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "l7987-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": "b6567184419c1bf088b4eb47e1665a42c0db7bf87bb5ddcd753ef11fbbc79c4f",
        "checked": "2026-11-05",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}