SG3525AN

{
  "schema_version": 1,
  "type": "component",
  "slug": "sg3525an",
  "title": "SG3525AN",
  "brief": "STMicroelectronics AC-DC Controllers and Regulators, DIP-16. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "sg3525an"
  ],
  "component": {
    "mpn": "SG3525AN",
    "manufacturer": "STMicroelectronics",
    "package": "DIP-16",
    "pin_count": 16,
    "category": "PMIC",
    "subcategory": "AC-DC Controllers and Regulators",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/a1bbac8e1d5def4b7a7c29abf3ab9d81.pdf",
    "parts": {
      "symbol": "sg3525an.kicad_sym",
      "footprint": "sg3525an.kicad_mod",
      "model_3d": "sg3525an-etched.glb",
      "model_3d_plain": "sg3525an.glb",
      "model_3d_step": "sg3525an-etched.step",
      "model_3d_step_plain": "sg3525an.step",
      "lbr": "sg3525an.lbr"
    },
    "distributor_links": {
      "lcsc": "C143246"
    },
    "pins": [
      {
        "number": "1",
        "name": "INV_INPUT",
        "type": "input",
        "description": "Inverting input of the error amplifier. Common-mode range includes the 5.1 V reference so external divider resistors are typically not required."
      },
      {
        "number": "2",
        "name": "NI_INPUT",
        "type": "input",
        "description": "Non-inverting input of the error amplifier. Typically tied to VREF (pin 16) via a divider for regulation feedback."
      },
      {
        "number": "3",
        "name": "SYNC",
        "type": "bidirectional",
        "description": "Oscillator sync terminal. Allows multiple units to be slaved together, or a single unit synchronized to an external system clock. Sync threshold ~2 V, sync input current ~1 mA at 3.5 V."
      },
      {
        "number": "4",
        "name": "OSC_OUTPUT",
        "type": "output",
        "description": "Oscillator clock output. Provides the internal clock waveform (typ. 3.5 V amplitude, 0.5 µs width) for external synchronization or diagnostics."
      },
      {
        "number": "5",
        "name": "CT",
        "type": "passive",
        "description": "Oscillator timing capacitor terminal. Connect timing capacitor CT (0.001 µF to 0.1 µF) from this pin to ground to set the oscillator frequency (100 Hz-400 kHz)."
      },
      {
        "number": "6",
        "name": "RT",
        "type": "passive",
        "description": "Oscillator timing resistor terminal. Connect RT (2 kΩ to 150 kΩ) from this pin to ground. Together with CT and RD sets fosc ≈ 1 / (CT·(0.7·RT + 3·RD))."
      },
      {
        "number": "7",
        "name": "DISCHARGE",
        "type": "passive",
        "description": "Discharge terminal. A resistor (0 to 500 Ω) placed between CT (pin 5) and DISCHARGE sets the dead-time (blanking) between outputs A and B."
      },
      {
        "number": "8",
        "name": "SOFT_START",
        "type": "passive",
        "description": "Soft-start capacitor terminal. An external capacitor to ground is charged by an internal ~50 µA current source to gradually increase duty cycle at startup."
      },
      {
        "number": "9",
        "name": "COMP",
        "type": "output",
        "description": "Error amplifier output / PWM comparator input. Compensation node; connect loop compensation network here. Output swing typ. 0.2-5.6 V."
      },
      {
        "number": "10",
        "name": "SHUTDOWN",
        "type": "input",
        "description": "Pulse-by-pulse shutdown input. Controls both the soft-start circuit and the output stages; drives outputs off via the PWM latch. Threshold ~0.8 V (referenced to VSS=5.1 V), typ. 0.5 µs shutdown delay."
      },
      {
        "number": "11",
        "name": "OUTPUT_A",
        "type": "output",
        "description": "PWM output A, totem-pole source/sink driver. Alternates with OUTPUT B at half the oscillator frequency. Source/sink capability >200 mA (peak 400 mA); LOW output in OFF state (NOR-logic output stage)."
      },
      {
        "number": "12",
        "name": "GROUND",
        "type": "power_in",
        "description": "Signal and power ground return for the device."
      },
      {
        "number": "13",
        "name": "VC",
        "type": "power_in",
        "description": "Collector supply voltage for the output driver totem-poles. Range 4.5 V to 35 V (independent of VI); allows separate biasing of the output stage."
      },
      {
        "number": "14",
        "name": "OUTPUT_B",
        "type": "output",
        "description": "PWM output B, totem-pole source/sink driver. Complementary to OUTPUT A (alternating pulses). Source/sink capability >200 mA (peak 400 mA); LOW in OFF state."
      },
      {
        "number": "15",
        "name": "VI",
        "type": "power_in",
        "description": "Main input supply voltage (+VI). Operating range 8 V to 35 V. Undervoltage lockout keeps outputs off below ~7 V with ~500 mV hysteresis."
      },
      {
        "number": "16",
        "name": "VREF",
        "type": "power_out",
        "description": "Internal 5.1 V precision reference output (trimmed to ±1 %). Short-circuit current ~80 mA; load current up to 20 mA. Bypass with 0.1 µF to ground."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/a1bbac8e1d5def4b7a7c29abf3ab9d81.pdf",
        "pages": 12,
        "sha256": "e5422b04ca23d090",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        0,
        0
      ],
      "corner": "bottom-right",
      "source": "fab-chamfer",
      "derived_from": "DIP-16_W7.62mm@sha256:d9f5f5a3dbebef05",
      "mark": "synthesised"
    },
    "models_3d": [
      {
        "file": "sg3525an.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          19.177,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "17a30b1f0ab3fd5384a1231e3c63c394888d5b952c542a8c189e023ed3467464",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sg3525an-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          19.177,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "217589a61a7cfb56f767a799323031ad4b0a70368c6081592757e0d1e9cdc2b1",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "STMicroelectronics",
      "Package": "DIP-16",
      "Category": "PMIC",
      "Pins": "16"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "sg3525an"
  ],
  "discovery_pitch": "SG3525AN (STMicroelectronics) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sg3525an.kicad_sym",
    "sg3525an.kicad_mod",
    "sg3525an.glb",
    "sg3525an.step",
    "sg3525an-etched.step",
    "sg3525an.lbr",
    "docs/hero.png",
    "docs/sg3525an-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "SG3525AN",
      "kind": "packaging"
    },
    {
      "mpn": "SG3525ANSG2525AN",
      "kind": "packaging"
    },
    {
      "mpn": "SG3525AP",
      "kind": "unknown"
    },
    {
      "mpn": "SG3525ANSG2525AP",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T05:45:02.808Z"
}