L7985ATR

{
  "schema_version": 1,
  "type": "component",
  "slug": "l7985atr",
  "title": "L7985ATR",
  "brief": "STMicroelectronics DC-DC Converters, SOIC-8. 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)",
    "l7985atr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "L7985ATR",
    "manufacturer": "STMicroelectronics",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588923635595677696",
    "parts": {
      "symbol": "l7985atr.kicad_sym",
      "footprint": "l7985atr.kicad_mod",
      "model_3d": "l7985atr-hero.glb",
      "model_3d_plain": "l7985atr.glb",
      "model_3d_step": "l7985atr-etched.step",
      "model_3d_step_plain": "l7985atr.step",
      "lbr": "l7985atr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2071310",
      "digikey": "497-13222-2-ND",
      "mouser": "511-L7985ATR"
    },
    "distributor_check": {
      "checked_at": "2026-10-12T03:16:30Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "497-13222-2-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "511-L7985ATR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "OUT",
        "type": "power_out",
        "description": "Regulator output; the output is set from 0.6 V up to VIN through an external divider on FB, and the absolute maximum OUT DC voltage is -0.3 V to VCC."
      },
      {
        "number": "2",
        "name": "SYNCH",
        "type": "input",
        "description": "Master/slave synchronization pin: when left floating it carries a signal half a period out of phase with power turn-on, and an external signal at a higher frequency synchronizes the device with zero phase shift."
      },
      {
        "number": "3",
        "name": "EN",
        "type": "input",
        "description": "Active-high enable: the device is ON when EN is higher than 1.2 V and OFF when EN is lower than 0.3 V."
      },
      {
        "number": "4",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier output used for loop frequency compensation; the analog pin absolute maximum rating is -0.3 V to 4 V."
      },
      {
        "number": "5",
        "name": "FB",
        "type": "input",
        "description": "Feedback input: connecting VOUT directly to FB regulates the output at 0.6 V, and higher voltages need an external resistor divider from VOUT; the feedback voltage absolute maximum is -0.3 V to 1.5 V."
      },
      {
        "number": "6",
        "name": "FSW",
        "type": "passive",
        "description": "Switching frequency pin: an external resistor from FSW to ground increases the frequency, and if left floating the device runs at its free-running frequency of 250 kHz."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Unregulated DC input voltage, with an operating range of 4.5 V to 38 V and an absolute maximum of 45 V."
      }
    ],
    "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: Package variant check: the ordering table lists L7985ATR as HSOP8, tape and reel, so the HSOP8 pin n; Pin connection figure (Figure 2, page 4) is an image with no readable pin numbers in the extracted t; Pin types are judgment calls for KiCad classes: SYNCH and EN as input, COMP as output (error amplifi"
        ],
        "pages_sent": 13,
        "cost_usd": 0.0413,
        "at": "2026-10-12T03:16:16"
      },
      "datasheet": {
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        "pages": 44,
        "sha256": "c5888b437dbd5200",
        "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"
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-12",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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      {
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        "sha256": "4710851d0788943c97261ffcf6ca5ea46a762f7b972fc11b75228a8dcbe43240",
        "checked": "2026-10-12",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "SOIC-8",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
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      "rows": [
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          "name": "Input voltage",
          "symbol": "Vcc",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 45,
          "conditions": "",
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        },
        {
          "name": "Output DC voltage",
          "symbol": "VOUT",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": null,
          "conditions": "max printed as VCC",
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        },
        {
          "name": "Analog pin voltage (FSW, COMP, SYNCH)",
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        {
          "name": "Enable pin voltage",
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        {
          "name": "Feedback voltage",
          "symbol": "FB",
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        {
          "name": "Power dissipation (HSOP)",
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          "max": 2,
          "conditions": "TA < 60 °C",
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        {
          "name": "Junction temperature range",
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        {
          "name": "Storage temperature range",
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          "unit": "°C",
          "min": -55,
          "typ": null,
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        {
          "name": "Maximum thermal resistance junction ambient (HSOP)",
          "symbol": "RthJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "Package mounted on demonstration board",
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        {
          "name": "Operating input voltage range",
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          "min": 4.5,
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          "conditions": "",
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        },
        {
          "name": "VCC UVLO hysteresis",
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          "kind": "electrical",
          "unit": "V",
          "min": 0.1,
          "typ": null,
          "max": 0.4,
          "conditions": "",
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        },
        {
          "name": "Maximum limiting current",
          "symbol": "ILIM",
          "kind": "electrical",
          "unit": "A",
          "min": 2.5,
          "typ": 3,
          "max": 3.5,
          "conditions": "",
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        },
        {
          "name": "Switching frequency",
          "symbol": "FSW",
          "kind": "electrical",
          "unit": "kHz",
          "min": 210,
          "typ": 250,
          "max": 275,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Duty cycle",
          "symbol": "D",
          "kind": "electrical",
          "unit": "%",
          "min": 0,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 6,
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        },
        {
          "name": "Adjustable switching frequency",
          "symbol": "FADJ",
          "kind": "electrical",
          "unit": "kHz",
          "min": null,
          "typ": null,
          "max": 1000,
          "conditions": "RFSW = 33 kΩ",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Feedback voltage",
          "symbol": "VFB",
          "kind": "electrical",
          "unit": "V",
          "min": 0.593,
          "typ": 0.6,
          "max": 0.607,
          "conditions": "4.5 V < VCC < 38 V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Feedback voltage",
          "symbol": "VFB",
          "kind": "electrical",
          "unit": "V",
          "min": 0.582,
          "typ": 0.6,
          "max": 0.618,
          "conditions": "4.5 V < VCC < 38 V; TJ -40 to +125 °C (footnote 1)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Quiescent current",
          "symbol": "IQ",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 2.4,
          "conditions": "Duty cycle = 0, VFB = 0.8 V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Total standby quiescent current",
          "symbol": "IQST-BY",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 20,
          "max": 30,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
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        {
          "name": "EN threshold voltage, device OFF level",
          "symbol": "VEN",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.3,
          "conditions": "Device OFF level",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "EN threshold voltage, device ON level",
          "symbol": "VEN",
          "kind": "electrical",
          "unit": "V",
          "min": 1.2,
          "typ": null,
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          "conditions": "Device ON level",
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        {
          "name": "EN current",
          "symbol": "IEN",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 7.5,
          "max": 10,
          "conditions": "EN = VCC",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Soft-start duration",
          "symbol": "TSS",
          "kind": "electrical",
          "unit": "ms",
          "min": 7.4,
          "typ": 8.2,
          "max": 9.1,
          "conditions": "FSW pin floating",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Error amplifier high level output voltage",
          "symbol": "VCH",
          "kind": "electrical",
          "unit": "V",
          "min": 3,
          "typ": null,
          "max": null,
          "conditions": "VFB < 0.6 V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Error amplifier low level output voltage",
          "symbol": "VCL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.1,
          "conditions": "VFB > 0.6 V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Source COMP pin current",
          "symbol": "IO SOURCE",
          "kind": "electrical",
          "unit": "mA",
          "min": 19,
          "typ": null,
          "max": null,
          "conditions": "VFB = 0.5 V, VCOMP = 1 V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Sink COMP pin current",
          "symbol": "IO SINK",
          "kind": "electrical",
          "unit": "mA",
          "min": 30,
          "typ": null,
          "max": null,
          "conditions": "VFB = 0.7 V, VCOMP = 1 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Open-loop voltage gain",
          "symbol": "GV",
          "kind": "electrical",
          "unit": "dB",
          "min": 100,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Synchronization high input voltage",
          "symbol": "VS_IN,HI",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": 3.3,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Synchronization low input voltage",
          "symbol": "VS_IN,LO",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Input pulse width",
          "symbol": "tS_IN_PW",
          "kind": "electrical",
          "unit": "ns",
          "min": 100,
          "typ": null,
          "max": null,
          "conditions": "VS_IN,HI = 3 V, VS_IN,LO = 0 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Input pulse width",
          "symbol": "tS_IN_PW",
          "kind": "electrical",
          "unit": "ns",
          "min": 300,
          "typ": null,
          "max": null,
          "conditions": "VS_IN,HI = 2 V, VS_IN,LO = 1 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Slave sink current",
          "symbol": "ISYNCH,LO",
          "kind": "electrical",
          "unit": "mA",
          "min": 0.7,
          "typ": null,
          "max": 1,
          "conditions": "VSYNCH = 2.9 V",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Master output amplitude",
          "symbol": "VS_OUT,HI",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "ISOURCE = 4.5 mA",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Turn-on VCC threshold",
          "symbol": "VCCON",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 4.5,
          "max": null,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "MOSFET on-resistance",
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          "kind": "electrical",
          "unit": "mΩ",
          "min": null,
          "typ": 200,
          "max": 400,
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          "name": "FSW pin voltage",
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          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.254,
          "max": null,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
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        {
          "name": "Soft-start duration",
          "symbol": "TSS",
          "kind": "electrical",
          "unit": "ms",
          "min": null,
          "typ": 2,
          "max": null,
          "conditions": "FSW = 1 MHz, R FSW = 33 kΩ",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output pulse width",
          "symbol": "tS_OUT_PW",
          "kind": "electrical",
          "unit": "ns",
          "min": null,
          "typ": 110,
          "max": null,
          "conditions": "SYNCH floating",
          "source_page": 7,
          "source": "datasheet"
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        {
          "name": "Thermal shutdown",
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          "kind": "electrical",
          "unit": "°C",
          "min": null,
          "typ": 150,
          "max": null,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Thermal shutdown hysteresis",
          "symbol": "",
          "kind": "electrical",
          "unit": "°C",
          "min": null,
          "typ": 30,
          "max": null,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        }
      ]
    }
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    "name": "Ray",
    "email": "[email protected]"
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