SG3525M

{
  "schema_version": 1,
  "type": "component",
  "slug": "sg3525m",
  "title": "SG3525M",
  "brief": "HGSEMI AC-DC Controllers and Regulators, SOP-16. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "sg3525m"
  ],
  "component": {
    "mpn": "SG3525M",
    "manufacturer": "HGSEMI",
    "package": "SOP-16",
    "pin_count": 16,
    "category": "PMIC",
    "subcategory": "AC-DC Controllers and Regulators",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/179b745af33dd2cf6d38402a364ddb96.pdf",
    "parts": {
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      "footprint": "sg3525m.kicad_mod",
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      "model_3d_plain": "sg3525m.glb",
      "model_3d_step": "sg3525m-etched.step",
      "model_3d_step_plain": "sg3525m.step",
      "lbr": "sg3525m.lbr"
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    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "Inv. Input",
        "type": "input",
        "description": "Inverting input of the internal error amplifier. Typical input offset 1.5mV, bias current ~1µA, common-mode range up to VREF (5.1V). Used with the compensation pin to close the voltage-regulation loop."
      },
      {
        "number": "2",
        "name": "Noninv. Input",
        "type": "input",
        "description": "Non-inverting input of the internal error amplifier. Common-mode range 1.5V to 5.2V, allowing direct connection to the on-chip 5.1V reference without an external divider."
      },
      {
        "number": "3",
        "name": "Sync",
        "type": "bidirectional",
        "description": "Oscillator sync pin. Used to synchronize the internal oscillator to an external clock (threshold 1.2-2.8V, sink ~1.3mA at 3.5V) or to slave/master multiple SG3525s together."
      },
      {
        "number": "4",
        "name": "OSC. Output",
        "type": "output",
        "description": "Oscillator clock output. Delivers a ~4V, 0.6µs-wide clock pulse per cycle, used for scope monitoring or as a sync source for downstream stages."
      },
      {
        "number": "5",
        "name": "CT",
        "type": "passive",
        "description": "Timing capacitor pin. Connect CT to GND to set the oscillator frequency together with RT (e.g. RT=2kΩ, CT=470pF → ~400kHz; RT=200kΩ, CT=0.1µF → ~60Hz)."
      },
      {
        "number": "6",
        "name": "RT",
        "type": "passive",
        "description": "Timing resistor pin. Connect RT to GND to program the oscillator charging current (charging current up to 5mA) and hence frequency, in conjunction with CT."
      },
      {
        "number": "7",
        "name": "Discharge",
        "type": "passive",
        "description": "CT discharge pin. A resistor placed between CT (pin 5) and Discharge sets the dead-time (blanking) between Output A and Output B pulses."
      },
      {
        "number": "8",
        "name": "Soft-Start",
        "type": "passive",
        "description": "Soft-start capacitor pin. A ~50µA (typ 51µA, 25-80µA) internal source charges an external cap here to slowly ramp the PWM duty cycle at start-up; discharged low (<0.7V) during shutdown."
      },
      {
        "number": "9",
        "name": "Compensation",
        "type": "output",
        "description": "Error-amplifier output / PWM comparator input. External RC network from this pin sets the loop compensation. PWM zero duty at ~0.9V, max duty (≥45%) at ~3.2V."
      },
      {
        "number": "10",
        "name": "Shutdown",
        "type": "input",
        "description": "Active-high shutdown input. Driving this pin above ~0.8V (threshold 0.6-1.0V) inhibits both outputs and discharges the soft-start cap, providing pulse-by-pulse current limit or emergency shutdown. Input current ~0.3mA at 2.5V."
      },
      {
        "number": "11",
        "name": "Output A",
        "type": "output",
        "description": "Totem-pole PWM output A. Sources/sinks >150mA (peak 400mA); VOH ≥18V at 20mA source, VOL ≤0.4V at 20mA sink. Alternates with Output B at half the oscillator frequency for push-pull/bridge drive."
      },
      {
        "number": "12",
        "name": "Ground",
        "type": "power_in",
        "description": "Signal / logic ground return for the reference, oscillator and control circuitry. Tie to system ground; often decoupled separately from the VC power ground in switching supplies."
      },
      {
        "number": "13",
        "name": "VC",
        "type": "power_in",
        "description": "Collector supply for the output totem-pole drivers. Absolute max 40V; usually tied to VCC or a separate driver rail sized for the gate-drive current (>150mA continuous)."
      },
      {
        "number": "14",
        "name": "Output B",
        "type": "output",
        "description": "Totem-pole PWM output B, complementary to Output A. Same drive characteristics (>150mA source/sink, 400mA peak). NOR-gated logic guarantees a low ('off') level during dead-time or shutdown."
      },
      {
        "number": "15",
        "name": "VCC",
        "type": "power_in",
        "description": "Main chip supply. Operating range 8-35V with UVLO threshold ~7V (6-8V). Typical ICC 12mA, max 20mA at 35V. Decouple locally with 0.1µF."
      },
      {
        "number": "16",
        "name": "Vref",
        "type": "power_out",
        "description": "Internal 5.1V ±1% reference output. Sources up to 20mA (short-circuit ~80mA). Decouple with 0.1µF to GND; can be used as bias for the error-amp non-inverting input."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/179b745af33dd2cf6d38402a364ddb96.pdf",
        "pages": 9,
        "sha256": "5277772c8ab62d7b",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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    "pin1": {
      "pad": "1",
      "at": [
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        -4.445
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      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-16_3.9x9.9mm_P1.27mm@sha256:f9b5075740f7816c",
      "mark": "drawn"
    },
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
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        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
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        "zmin_mm": 0,
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        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "HGSEMI",
      "Package": "SOP-16",
      "Category": "PMIC",
      "Pins": "16"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
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  "discovery_pitch": "SG3525M (HGSEMI) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
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    "README.md",
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    "viewers/symbol.html",
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  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "SG3525MM/TR",
      "kind": "packaging"
    },
    {
      "mpn": "SG3525MN",
      "kind": "packaging"
    },
    {
      "mpn": "SG3525MMT/TR",
      "kind": "packaging"
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      "mpn": "SG3525MMS/TR",
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  ],
  "updated_at": "2026-09-25T05:45:27.508Z"
}