EUP3484DIR1

{
  "schema_version": 1,
  "type": "component",
  "slug": "eup3484dir1",
  "title": "EUP3484DIR1",
  "brief": "Eutech Microelectronics DC-DC Converters, SOIC-8-EP. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "eup3484dir1"
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  "component": {
    "mpn": "EUP3484DIR1",
    "manufacturer": "Eutech Microelectronics",
    "package": "SOIC-8-EP",
    "pin_count": 9,
    "category": "PMIC",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/5a5660e7dc364bb49fe0a7ad8cdccdbd.pdf",
    "parts": {
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      "lbr": "eup3484dir1.lbr"
    },
    "distributor_links": {
      "lcsc": "C47740"
    },
    "pins": [
      {
        "number": "1",
        "name": "BS",
        "type": "passive",
        "description": "High-Side Gate Drive Boost Input. Supplies drive for the high-side N-Channel DMOS switch. Connect a 0.01μF (10nF) or greater bootstrap capacitor from SW to BS to power the high-side switch. Absolute maximum: VSW-0.3V to VSW+6V."
      },
      {
        "number": "2",
        "name": "IN",
        "type": "power_in",
        "description": "Input Supply Pin. Supplies power to the IC and to the step-down converter switches. Drive IN with a 4.5V to 30V power source (abs max 35V). Bypass to GND with a suitably large capacitor to minimize input ripple."
      },
      {
        "number": "3",
        "name": "SW",
        "type": "power_out",
        "description": "Power Switching Output. Connect the output LC filter (inductor to output capacitor) from SW to the load. Switch voltage range -1V to VIN+0.3V."
      },
      {
        "number": "4",
        "name": "GND",
        "type": "power_in",
        "description": "Ground. Must be connected to the exposed thermal pad for proper operation. Connect the thermal pad to the PCB ground plane using multiple vias for good thermal performance."
      },
      {
        "number": "5",
        "name": "FB",
        "type": "input",
        "description": "Output Feedback Input. Senses and regulates the output voltage. Drive FB with a resistive voltage divider from the output; feedback threshold is 0.925V (typ). VOUT = 0.925 × (R1+R2)/R2."
      },
      {
        "number": "6",
        "name": "COMP",
        "type": "output",
        "description": "Loop Compensation Input/Error-Amplifier Output. Connect a series RC network from COMP to GND to compensate the regulation control loop."
      },
      {
        "number": "7",
        "name": "EN",
        "type": "input",
        "description": "Enable Input. Logic input controlling on/off. Drive high to turn on, low to turn off. Do not leave floating; directly connect to IN (or through a resistance) for automatic startup. Disable threshold typ 1.5V; lockout threshold typ 2.5V; abs max -0.3V to 35V."
      },
      {
        "number": "8",
        "name": "SS",
        "type": "passive",
        "description": "Soft-Start Control Input. Connect an external capacitor (e.g. 0.1μF) to program the soft-start ramp; charge current is typ 6μA. Leave open to use the internal soft-start function."
      },
      {
        "number": "9",
        "name": "GND (Exposed Pad)",
        "type": "power_in",
        "description": "Exposed thermal pad on package underside. Electrically tied to GND (pin 4). Must be soldered to the PCB ground plane with multiple thermal vias for proper thermal and electrical performance (θJA ≈ 60°C/W)."
      }
    ],
    "provenance": {
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        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 9,
        "described": 9,
        "cites_pages": true,
        "refuses_to_fabricate": true
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    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -1.905
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm@sha256:a7971720bdda0353",
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  "metadata": {
    "specs": {
      "Manufacturer": "Eutech Microelectronics",
      "Package": "SOIC-8-EP",
      "Category": "PMIC",
      "Pins": "9"
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    "characteristics": {
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          "name": "Shutdown Supply Current",
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          "name": "Feedback Voltage",
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          "min": 0.907,
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        {
          "name": "Error Amplifier Voltage Gain",
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          "typ": 360,
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          "name": "Error Amplifier Transconductance",
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        {
          "name": "High-Side Switch On-Resistance",
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          "kind": "electrical",
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          "name": "Low-Side Switch On-Resistance",
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          "name": "High-Side Switch Leakage Current",
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          "typ": 5,
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          "conditions": "VEN=0V, VSW=0V",
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        {
          "name": "Upper Switch Current Limit",
          "symbol": "",
          "kind": "electrical",
          "unit": "A",
          "min": 3.8,
          "typ": null,
          "max": 5.5,
          "conditions": "Minimum Duty Cycle",
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          "name": "Lower Switch Current Limit",
          "symbol": "",
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          "typ": 1.1,
          "max": null,
          "conditions": "From Drain to Source",
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        {
          "name": "COMP to Current Sense Transconductance",
          "symbol": "",
          "kind": "electrical",
          "unit": "A/V",
          "min": null,
          "typ": 7.5,
          "max": null,
          "conditions": "",
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        },
        {
          "name": "Oscillation Frequency",
          "symbol": "",
          "kind": "electrical",
          "unit": "KHz",
          "min": 300,
          "typ": 340,
          "max": 380,
          "conditions": "",
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        {
          "name": "Short Circuit Oscillation Frequency",
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          "kind": "electrical",
          "unit": "KHz",
          "min": null,
          "typ": 110,
          "max": null,
          "conditions": "VFB=0V",
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        },
        {
          "name": "Maximum Duty Cycle",
          "symbol": "",
          "kind": "electrical",
          "unit": "%",
          "min": null,
          "typ": 90,
          "max": null,
          "conditions": "VFB=0.7V",
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        {
          "name": "EN Disable Threshold (●)",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 0.36,
          "typ": 1.5,
          "max": 2,
          "conditions": "● full operating temperature range",
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        {
          "name": "EN Lockout Threshold",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 2.3,
          "typ": 2.5,
          "max": 2.8,
          "conditions": "VEN Rising",
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        {
          "name": "EN Lockout Threshold (●)",
          "symbol": "",
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          "min": 2,
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          "max": 3,
          "conditions": "● full operating temperature range",
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        {
          "name": "EN Lockout Threshold Hysteresis",
          "symbol": "",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 210,
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        {
          "name": "Input Under Voltage Lockout Threshold",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 3.8,
          "typ": 4.1,
          "max": 4.4,
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        {
          "name": "Input Over Voltage Lockout Threshold",
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          "min": null,
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        {
          "name": "Input Over Voltage Lockout Threshold Hysteresis",
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          "min": null,
          "typ": 2,
          "max": null,
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        {
          "name": "Soft-Start Charge Current",
          "symbol": "",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 6,
          "max": null,
          "conditions": "VSS=0V",
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        {
          "name": "Thermal Shutdown",
          "symbol": "",
          "kind": "electrical",
          "unit": "°C",
          "min": null,
          "typ": 160,
          "max": null,
          "conditions": "",
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        {
          "name": "Supply Voltage",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 35,
          "conditions": "",
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        {
          "name": "Enable Voltage",
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          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 35,
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          "name": "Switch Voltages",
          "symbol": "VSW",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -1,
          "typ": null,
          "max": null,
          "conditions": "Maximum printed as VIN +0.3V",
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        {
          "name": "Boot Voltage",
          "symbol": "VBS",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "Referenced to VSW: VSW-0.3V to VSW+6V",
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        {
          "name": "All Other Pins",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "",
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        {
          "name": "Junction Temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
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        {
          "name": "Lead Temperature",
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        {
          "name": "Storage Temperature",
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          "min": -65,
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          "name": "Output Voltage",
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          "name": "Thermal Resistance Junction-to-Ambient",
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          "name": "Input Voltage",
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          "name": "Ambient Operating Temperature",
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          "min": -40,
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          "conditions": "",
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