CD5035IHTS

{
  "slug": "cd5035ihts",
  "version": "0.1.0",
  "type": "component",
  "description": "Shenzhen CYT Semicon Tech DC-DC Converters, HTSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "cd5035ihts",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cd5035ihts.kicad_sym",
    "cd5035ihts.kicad_mod",
    "cd5035ihts.glb",
    "cd5035ihts.step",
    "cd5035ihts.lbr",
    "docs/hero.png",
    "docs/cd5035ihts-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "cd5035ihts-hero.glb",
    "cd5035ihts-hero.overlay.json",
    "cd5035ihts-etched.glb"
  ],
  "component": {
    "mpn": "CD5035IHTS",
    "manufacturer": "Shenzhen CYT Semicon Tech",
    "package": "HTSSOP-20",
    "pin_count": 21,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590917178906521600",
    "parts": {
      "symbol": "cd5035ihts.kicad_sym",
      "footprint": "cd5035ihts.kicad_mod",
      "model_3d": "cd5035ihts-hero.glb",
      "model_3d_plain": "cd5035ihts-etched.glb",
      "model_3d_step": "cd5035ihts-etched.step",
      "model_3d_step_plain": "cd5035ihts.step",
      "lbr": "cd5035ihts.lbr"
    },
    "distributor_links": {
      "lcsc": "C7502980"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T08:35:31Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "error"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "RAMP",
        "type": "input",
        "description": "Ramp modulation pin, where an external RC network on VIN sets the ramp slope, and an internal FET discharges it at the end of each cycle."
      },
      {
        "number": "2",
        "name": "UVLO",
        "type": "input",
        "description": "Input undervoltage lockout pin, where an external divider sets the shutdown and standby levels; VCC and REF regulators enable at 0.4V, SS is released at the 1.25V threshold, and hysteresis is a 23µA current sink."
      },
      {
        "number": "3",
        "name": "OVP",
        "type": "input",
        "description": "Input overvoltage protection pin, where an external divider sets the shutdown level against a 1.25V threshold, with 23µA hysteresis current supplied by an internal source."
      },
      {
        "number": "4",
        "name": "COMP",
        "type": "input",
        "description": "Pulse-width adjust input, where optocoupler current feeds an internal NPN current mirror; duty cycle is maximum at zero input current and falls to zero at 1mA."
      },
      {
        "number": "5",
        "name": "RT",
        "type": "input",
        "description": "Oscillator frequency control and sync clock input, typically biased at 2V; an external resistor from RT to AGND sets the free-running frequency, and external sync can run above that frequency."
      },
      {
        "number": "6",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground pin, connected directly to the power supply ground."
      },
      {
        "number": "7",
        "name": "CS",
        "type": "input",
        "description": "Current sense input; the output pulse is terminated cycle by cycle when CS exceeds 0.25V, and CS is held low for 50ns after the leading-edge blanking time."
      },
      {
        "number": "8",
        "name": "SS",
        "type": "passive",
        "description": "Soft-start input, where an internal 55µA source charges the external capacitor to set the soft-start rate, reduced to 1.2µA during current-limit restart sequences."
      },
      {
        "number": "9",
        "name": "DLY",
        "type": "passive",
        "description": "Timing programming pin, where an external resistor to ground sets the non-overlap time between HO to SR1 and LO to SR2."
      },
      {
        "number": "10",
        "name": "RES",
        "type": "passive",
        "description": "Restart timing pin, which receives 22µA into its capacitor on any cycle exceeding cycle-by-cycle current limit; at 2.5V the soft-start capacitor is fully discharged and then released with a 1.2µA pull-up."
      },
      {
        "number": "11",
        "name": "HB",
        "type": "power_in",
        "description": "Bootstrap pin for the HO driver, requiring an external diode from VCC and an external capacitor from HS to supply the high-side gate driver."
      },
      {
        "number": "12",
        "name": "HS",
        "type": "passive",
        "description": "Switch node, the common connection of the transformer and the two power switches, providing the return path for the HO gate driver."
      },
      {
        "number": "13",
        "name": "HO",
        "type": "output",
        "description": "High-side PWM gate drive output, rated to sink 2A peak current."
      },
      {
        "number": "14",
        "name": "LO",
        "type": "output",
        "description": "Low-side PWM gate drive output, rated to sink 2A peak current."
      },
      {
        "number": "15",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground pin, connected directly to the analog ground."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "High-voltage start-up regulator pin; the start regulator turns off when an auxiliary winding raises this pin above the setpoint, and the recommended VCC range is 8V to 15V."
      },
      {
        "number": "17",
        "name": "SR2",
        "type": "output",
        "description": "Synchronous rectifier drive output 2, controlling the sync FET gate with 0.5A peak current capability."
      },
      {
        "number": "18",
        "name": "SR1",
        "type": "output",
        "description": "Synchronous rectifier drive output 1, controlling the sync FET gate with 0.5A peak current capability."
      },
      {
        "number": "19",
        "name": "REF",
        "type": "power_out",
        "description": "Reference voltage output with a maximum output current of 20mA, decoupled locally with a 0.1pF capacitor as printed in the datasheet."
      },
      {
        "number": "20",
        "name": "VIN",
        "type": "power_in",
        "description": "Power input pin with an operating input range of 13V to 105V; supplies outside this range can be applied directly to VCC through an external regulator."
      },
      {
        "number": "21",
        "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: REF decoupling capacitor is printed as '0.1pF', which is probably a typo (likely 0.1µF). Reported as; The datasheet does not state KiCad electrical types for any pin. Types were assigned from the functi; DLY is labeled an 'output' pin in the datasheet, but its function is a resistor-programmed timing no",
          "exposed pad 21 added from the footprint"
        ],
        "pages_sent": 13,
        "cost_usd": 0.0565,
        "at": "2026-10-19T08:32:35"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590917178906521600",
        "pages": 13,
        "sha256": "c542b47ea5017dae",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 21,
        "described": 21,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "cd5035ihts.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.41,
          6.5,
          1.2
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "99af96f1da5c85ddc070f2922af0f1da04923f49457f10632d79895dd1142e27",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cd5035ihts-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.41,
          6.5,
          1.2
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "c1f8d0d09273758793e6458bad48438575e15ff8dcf33d70b7121b7a8a292bb9",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}