HT3605ARQZ

{
  "slug": "ht3605arqz",
  "version": "0.1.0",
  "type": "component",
  "description": "HTCSEMI DC-DC Converters, QFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "ht3605arqz",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ht3605arqz.kicad_sym",
    "ht3605arqz.kicad_mod",
    "ht3605arqz.glb",
    "ht3605arqz.step",
    "ht3605arqz.lbr",
    "docs/hero.png",
    "docs/ht3605arqz-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ht3605arqz-hero.glb",
    "ht3605arqz-hero.overlay.json",
    "ht3605arqz-etched.glb"
  ],
  "component": {
    "mpn": "HT3605ARQZ",
    "manufacturer": "HTCSEMI",
    "package": "QFN-24-EP(4x4)",
    "pin_count": 25,
    "category": "Power Management (PMIC)",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/82f1b9634448183963e69d9471ccab5f.pdf",
    "parts": {
      "symbol": "ht3605arqz.kicad_sym",
      "footprint": "ht3605arqz.kicad_mod",
      "model_3d": "ht3605arqz-hero.glb",
      "model_3d_plain": "ht3605arqz-etched.glb",
      "model_3d_step": "ht3605arqz-etched.step",
      "model_3d_step_plain": "ht3605arqz.step",
      "lbr": "ht3605arqz.lbr"
    },
    "distributor_links": {
      "lcsc": "C28646426"
    },
    "distributor_check": {
      "checked_at": "2026-10-23T12:31:00Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "RT",
        "type": "passive",
        "description": "Switching frequency setting pin; a resistor from RT to GND adjusts the switching frequency from 800kHz to 2MHz."
      },
      {
        "number": "2",
        "name": "PHMODE",
        "type": "input",
        "description": "Output phase selection pin setting the phase relationship between the internal oscillator and CLKOUT: connect to VCC for 2-phase, to SGND for 3-phase, to VCC/2 for 4-phase operation."
      },
      {
        "number": "3",
        "name": "MODE",
        "type": "input",
        "description": "Mode selection pin: connect to VCC for forced continuous synchronous operation at all loads, to SGND for discontinuous mode at light load; do not float."
      },
      {
        "number": "4",
        "name": "FB",
        "type": "input",
        "description": "Output voltage feedback pin; set the output voltage with a resistor divider between VOUT and GND."
      },
      {
        "number": "5",
        "name": "TRACK/SS",
        "type": "input",
        "description": "Output tracking and soft-start pin; an external capacitor sets the output ramp time, below 0.6V it overrides the error amplifier internal reference, above 0.6V tracking stops and the internal reference resumes control."
      },
      {
        "number": "6",
        "name": "ITH",
        "type": "output",
        "description": "Error amplifier output and switching regulator compensation point; the current comparator trip threshold is linearly proportional to this voltage, normal range 1.2V to 1.8V."
      },
      {
        "number": "7",
        "name": "EN",
        "type": "input",
        "description": "Regulator output enable pin, high enables the output; an external resistor divider can set an adjustable VIN undervoltage lockout."
      },
      {
        "number": "8",
        "name": "PG",
        "type": "output",
        "description": "Open-drain power-good indicator for the buck output voltage; the pull-down stops when the output is normal."
      },
      {
        "number": "9",
        "name": "VON",
        "type": "input",
        "description": "Output voltage node; connect to the output voltage so on-time is proportional to VOUT and switching frequency stays constant across VOUT, but constant frequency is lost when VON is <0.6V or >6V."
      },
      {
        "number": "10",
        "name": "PGND",
        "type": "power_in",
        "description": "Power ground pin; connect one or more decoupling ceramic capacitors to VIN as close to the pin as possible."
      },
      {
        "number": "11",
        "name": "SW",
        "type": "power_out",
        "description": "Internal power switch node; connect the power inductor and the CBST capacitor externally."
      },
      {
        "number": "12",
        "name": "SW",
        "type": "power_out",
        "description": "Internal power switch node; connect the power inductor and the CBST capacitor externally."
      },
      {
        "number": "13",
        "name": "SW",
        "type": "power_out",
        "description": "Internal power switch node; connect the power inductor and the CBST capacitor externally."
      },
      {
        "number": "14",
        "name": "SW",
        "type": "power_out",
        "description": "Internal power switch node; connect the power inductor and the CBST capacitor externally."
      },
      {
        "number": "15",
        "name": "SW",
        "type": "power_out",
        "description": "Internal power switch node; connect the power inductor and the CBST capacitor externally."
      },
      {
        "number": "16",
        "name": "SW",
        "type": "power_out",
        "description": "Internal power switch node; connect the power inductor and the CBST capacitor externally."
      },
      {
        "number": "17",
        "name": "PVIN",
        "type": "power_in",
        "description": "Regulator power supply input (4V to 20V); use a 2.2µF or larger ceramic capacitor placed as close as possible from VIN to GND."
      },
      {
        "number": "18",
        "name": "PVIN",
        "type": "power_in",
        "description": "Regulator power supply input (4V to 20V); use a 2.2µF or larger ceramic capacitor placed as close as possible from VIN to GND."
      },
      {
        "number": "19",
        "name": "SVIN",
        "type": "power_in",
        "description": "Regulator signal supply input; connect a 1Ω to 10Ω resistor between SVIN and PVIN and bypass to GND with a 0.1µF capacitor."
      },
      {
        "number": "20",
        "name": "BST",
        "type": "passive",
        "description": "Bootstrap drive supply; requires a high-quality 100nF ceramic capacitor between BST and SW to bias the internal high-side gate driver."
      },
      {
        "number": "21",
        "name": "VCC",
        "type": "power_out",
        "description": "Internal 3.3V regulator output; requires a 1µF to 4.7µF ceramic decoupling capacitor between VCC and PGND placed close to the pin."
      },
      {
        "number": "22",
        "name": "SGND",
        "type": "power_in",
        "description": "Chip signal ground pin."
      },
      {
        "number": "23",
        "name": "CLKOUT",
        "type": "output",
        "description": "Output clock signal for multiphase operation; its phase relative to CLKIN is set by the PHMODE pin and its amplitude is VCC to GND."
      },
      {
        "number": "24",
        "name": "CLKIN",
        "type": "input",
        "description": "External clock synchronization input with an internal 20k termination to SGND; the phase-locked loop forces the top-power NMOS turn-on signal to sync with the CLKIN rising edge."
      },
      {
        "number": "25",
        "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-sonnet-5-5",
        "primary_mode": "vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Datasheet is in Chinese and lists the exposed pad as 'EP' sharing the PGND function with pin 10; no ; Only the QFN4x4-24 package is shown in the datasheet pages read (pages 1-3); pages 4-12 were not rea",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 12,
        "cost_usd": 0.2414,
        "at": "2026-10-23T12:30:36"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/82f1b9634448183963e69d9471ccab5f.pdf",
        "pages": 17,
        "sha256": "a41232f8a27d2b61",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 25,
        "described": 25,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "ht3605arqz.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "096fc110543e6d324c5120c2d38e3dca87a389da9b6fac234f1fe40856295ef4",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ht3605arqz-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "59fd9d1564de8904bc139d7f661a5d3006a57db8cc3e1fc766351626640f27cd",
        "checked": "2026-10-23",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}