CD5021IVS

{
  "schema_version": 1,
  "type": "component",
  "slug": "cd5021ivs",
  "title": "CD5021IVS",
  "brief": "Shenzhen CYT Semicon Tech DC-DC Converters, VSSOP-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)",
    "cd5021ivs",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "CD5021IVS",
    "manufacturer": "Shenzhen CYT Semicon Tech",
    "package": "VSSOP-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586209201877737472",
    "parts": {
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      "footprint": "cd5021ivs.kicad_mod",
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      "lbr": "cd5021ivs.lbr"
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    "distributor_links": {
      "lcsc": "C7502985"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T03:11:32Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
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    },
    "pins": [
      {
        "number": "1",
        "name": "COMP",
        "type": "bidirectional",
        "description": "PWM and hiccup-mode control node, internally pulled up through a 5 kΩ resistor for optocoupler transistor biasing, with open-circuit voltage 4.2-6.0 V and short-circuit current 0.6-1.5 mA."
      },
      {
        "number": "2",
        "name": "VIN",
        "type": "power_in",
        "description": "Input for the start-up regulator, clamped internally to 36 V by a zener, with a recommended operating range of 8 V to 30 V and VIN of at least 20 V needed for the first start-up."
      },
      {
        "number": "3",
        "name": "VCC",
        "type": "power_out",
        "description": "Linear regulator output, typically 8.5 V (8.0-9.0 V), that biases the controller and gate driver, must be bypassed with a capacitor to GND, and must not be driven by the auxiliary winding or an external supply."
      },
      {
        "number": "4",
        "name": "OUT",
        "type": "output",
        "description": "MOSFET gate driver output with a maximum source (charge) current of 0.3 A and maximum sink (discharge) current of 0.7 A."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Reference ground for the controller."
      },
      {
        "number": "6",
        "name": "CS",
        "type": "input",
        "description": "Current-sense input for peak current mode control and cycle-by-cycle overcurrent protection, with a 0.45-0.55 V threshold, and CS must stay low for 90 ns after the OUT driver turns on to blank the leading-edge spike."
      },
      {
        "number": "7",
        "name": "RT",
        "type": "bidirectional",
        "description": "Oscillator timing resistor pin set to GND (RT = 6.63×10^9 / FSW, RT in kΩ, FSW in kHz), which also accepts external clock sync pulses, with an absolute maximum of 5.5 V."
      },
      {
        "number": "8",
        "name": "SS",
        "type": "passive",
        "description": "Soft-start and hiccup timing pin charged by an internal 22 µA source through an external capacitor, which sets the soft-start slope and hiccup period, with open-circuit voltage 4.3-6.1 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: Pin numbers 1-8 and names come from the pin function table on page 5. The pin diagram graphic on pag; The datasheet does not give an ERC pin type. COMP is assigned bidirectional because it is internally; RT is assigned bidirectional because it is both a timing resistor connection and a sync-clock input."
        ],
        "pages_sent": 11,
        "cost_usd": 0.0323,
        "at": "2026-10-18T03:10:16"
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        "pages": 11,
        "sha256": "50a42e2c245adec0",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
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        "seat": "z = 0",
        "extents_mm": [
          3.1,
          2,
          0.85
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "353552981eef35cb93635057d4aeb89aef22648c77af6fd095e328bfe6b834bd",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Shenzhen CYT Semicon Tech",
      "Package": "VSSOP-8",
      "Category": "Power Management (PMIC)",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "50a42e2c245adec0b704419bd44a00fa29a5425e52145c65f2d53f5a7e724b8d",
      "rows": [
        {
          "name": "VCC output voltage",
          "symbol": "VVCC",
          "kind": "electrical",
          "unit": "V",
          "min": 8,
          "typ": 8.5,
          "max": 9,
          "conditions": "COMP=5V,CS=0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VCC regulator enable threshold",
          "symbol": "VVIN-EN",
          "kind": "electrical",
          "unit": "V",
          "min": 17,
          "typ": 20,
          "max": 23,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Start-up regulator leakage current",
          "symbol": "IVIN",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 2.5,
          "max": 3.75,
          "conditions": "COMP=0V,CS=0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VCC load capability",
          "symbol": "IVCC-limit",
          "kind": "electrical",
          "unit": "mA",
          "min": 15,
          "typ": 22,
          "max": null,
          "conditions": "COMP=5V,CS=0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VCC UVLO rising threshold",
          "symbol": "VVCC-EN",
          "kind": "electrical",
          "unit": "V",
          "min": 6.5,
          "typ": 7.2,
          "max": 7.5,
          "conditions": "VIN=7V,CS=0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VCC UVLO falling threshold",
          "symbol": "VVCC-DIS",
          "kind": "electrical",
          "unit": "V",
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          "typ": 5.8,
          "max": 6.3,
          "conditions": "",
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        },
        {
          "name": "Overcurrent protection threshold",
          "symbol": "VCS",
          "kind": "electrical",
          "unit": "V",
          "min": 0.45,
          "typ": 0.5,
          "max": 0.55,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Soft-start charging current",
          "symbol": "ISS",
          "kind": "electrical",
          "unit": "μA",
          "min": 15,
          "typ": 22,
          "max": 30,
          "conditions": "COMP=2V,CS=SS=0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "SS open-circuit voltage",
          "symbol": "VSS-OCV",
          "kind": "electrical",
          "unit": "V",
          "min": 4.3,
          "typ": 5,
          "max": 6.1,
          "conditions": "COMP=2V,CSS=5nF",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "COMP open-circuit voltage",
          "symbol": "VCOMP",
          "kind": "electrical",
          "unit": "V",
          "min": 4.2,
          "typ": 4.78,
          "max": 6,
          "conditions": "SS=4.5V,CSS=5nF",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "COMP short-circuit current",
          "symbol": "ICOMP",
          "kind": "electrical",
          "unit": "mA",
          "min": 0.6,
          "typ": 0.95,
          "max": 1.5,
          "conditions": "COMP=0V,CS=0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Pulse (switching) frequency",
          "symbol": "FOSC",
          "kind": "electrical",
          "unit": "kHz",
          "min": 135,
          "typ": 150,
          "max": 165,
          "conditions": "COMP=2V,CS=0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum output duty cycle",
          "symbol": "Duty（max）",
          "kind": "electrical",
          "unit": "%",
          "min": 75,
          "typ": 80,
          "max": 85,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "VIN to GND",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 30,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VCC to GND",
          "symbol": "",
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          "min": -0.3,
          "typ": null,
          "max": 10,
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        },
        {
          "name": "CS to GND",
          "symbol": "",
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          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 1.25,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "RT to GND",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "All other pins to GND",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Input voltage VIN",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 8,
          "typ": null,
          "max": 30,
          "conditions": "Footnote a: at first start-up VIN must be ≥20V to enter normal operation",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "VCC voltage",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 8,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating temperature range",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
    }
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  "author": {
    "name": "Ray",
    "email": "[email protected]"
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