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UC3524D
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Texas Instruments DC-DC Converters, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+52@@ -0,0 +1,52 @@+# UC3524D++**Texas Instruments** · DC-DC Converters · SOIC-16++UC3524D from Texas Instruments, in a SOIC-16. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | INV INPUT | input | Inverting input of the error amplifier, which is compared against the non-inverting input and the internal reference divider network. |+| 2 | NON INV INPUT | input | Non-inverting input of the error amplifier; the error amplifier common-mode range is 1.8 V to 3.4 V at TJ = 25°C. |+| 3 | OSC OUT | output | Oscillator output that also serves as the output blanking pulse; it can be driven by an external clock of about 3 V with approximately 2 kΩ impedance to ground, and up to 100 pF shunt capacitance may be added to increase dead time. |+| 4 | CL SENSE(+) | input | Non-inverting input of the current-limit comparator; the sense voltage is 200 mV typical with the error amplifier at maximum output, and the common-mode range is -1 V to 1 V. |+| 5 | CL SENSE(-) | input | Inverting input of the current-limit comparator, used with pin 4 to sense load current; the common-mode range is -1 V to 1 V. |+| 6 | RT | passive | Timing resistor pin that sets the oscillator charging current together with CT; practical values are 1.8 kΩ to 100 kΩ (recommended range 1.8 kΩ to 100 kΩ). |+| 7 | CT | passive | Timing capacitor pin that sets the oscillator ramp and blanking width; recommended value is 0.001 µF to 0.1 µF and current through the CT terminal is limited to -0.03 mA to -2 mA. |+| 8 | GND | power_in | Ground terminal; all voltages in the datasheet are referenced to this pin. |+| 9 | COMP | passive | Compensation node shared by the error amplifier output and the current-limit/shutdown inputs, used to set error amplifier gain or compensation. |+| 10 | S/D | input | Shutdown input that overrides the error amplifier output through the comparator to disable the outputs. |+| 11 | EA | output | Emitter output of output transistor A, rated for 40 V collector-emitter and 100 mA maximum collector output current. |+| 12 | CA | output | Collector of output transistor A, rated at 40 V collector-emitter and 100 mA maximum collector output current. |+| 13 | CB | output | Collector of output transistor B, rated at 40 V collector-emitter and 100 mA maximum collector output current. |+| 14 | EB | output | Emitter output of output transistor B, rated for 40 V collector-emitter and 100 mA maximum collector output current. |+| 15 | VIN | power_in | Supply voltage input, 8 V to 40 V recommended, with 40 V absolute maximum referenced to pin 8. |+| 16 | VREF | power_out | 5 V reference output, recommended to source 0 mA to 20 mA (50 mA absolute maximum). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-16 |+| Category | Power Management (PMIC) |+| Pins | 16 |++## CAD (KiCad official)++- Symbol: `UC3524D`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOIC-16 (KiCad packages3D, STEP)+- 3D model files: `uc3524d-etched.step` / `uc3524d-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `uc3524d.step` / `uc3524d.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/uc3524) (18 pp, sha256 `42407e137f08653a`, retrieved 2026-10-08, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/uc3524d-datasheet.pdf)
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the error amplifier common-mode range is 1.8 V to 3.4 V at TJ = 25°C."+ },+ {+ "number": "3",+ "name": "OSC OUT",+ "type": "output",+ "description": "Oscillator output that also serves as the output blanking pulse; it can be driven by an external clock of about 3 V with approximately 2 kΩ impedance to ground, and up to 100 pF shunt capacitance may be added to increase dead time."+ },+ {+ "number": "4",+ "name": "CL SENSE(+)",+ "type": "input",+ "description": "Non-inverting input of the current-limit comparator; the sense voltage is 200 mV typical with the error amplifier at maximum output, and the common-mode range is -1 V to 1 V."+ },+ {+ "number": "5",+ "name": "CL SENSE(-)",+ "type": "input",+ "description": "Inverting input of the current-limit comparator, used with pin 4 to sense load current; the common-mode range is -1 V to 1 V."+ },+ {+ "number": "6",+ "name": "RT",+ "type": "passive",+ "description": "Timing resistor pin that sets the oscillator charging current together with CT; practical values are 1.8 kΩ to 100 kΩ (recommended range 1.8 kΩ to 100 kΩ)."+ },+ {+ "number": "7",+ "name": "CT",+ "type": "passive",+ "description": "Timing capacitor pin that sets the oscillator ramp and blanking width; recommended value is 0.001 µF to 0.1 µF and current through the CT terminal is limited to -0.03 mA to -2 mA."+ },+ {+ "number": "8",+ "name": "GND",+ "type": "power_in",+ "description": "Ground terminal; all voltages in the datasheet are referenced to this pin."+ },+ {+ "number": "9",+ "name": "COMP",+ "type": "passive",+ "description": "Compensation node shared by the error amplifier output and the current-limit/shutdown inputs, used to set error amplifier gain or compensation."+ },+ {+ "number": "10",+ "name": "S/D",+ "type": "input",+ "description": "Shutdown input that overrides the error amplifier output through the comparator to disable the outputs."+ },+ {+ "number": "11",+ "name": "EA",+ "type": "output",+ "description": "Emitter output of output transistor A, rated for 40 V collector-emitter and 100 mA maximum collector output current."+ },+ {+ "number": "12",+ "name": "CA",+ "type": "output",+ "description": "Collector of output transistor A, rated at 40 V collector-emitter and 100 mA maximum collector output current."+ },+ {+ "number": "13",+ "name": "CB",+ "type": "output",+ "description": "Collector of output transistor B, rated at 40 V collector-emitter and 100 mA maximum collector output current."+ },+ {+ "number": "14",+ "name": "EB",+ "type": "output",+ "description": "Emitter output of output transistor B, rated for 40 V collector-emitter and 100 mA maximum collector output current."+ },+ {+ "number": "15",+ "name": "VIN",+ "type": "power_in",+ "description": "Supply voltage input, 8 V to 40 V recommended, with 40 V absolute maximum referenced to pin 8."+ },+ {+ "number": "16",+ "name": "VREF",+ "type": "power_out",+ "description": "5 V reference output, recommended to source 0 mA to 20 mA (50 mA absolute maximum)."+ }+ ],+ "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: The connection diagram text extraction is garbled. Pin assignments were reconstructed from the conne; The UC3524D is the narrow-body D package, but the text only contains the DW0016A package drawing (wi; Pin descriptions for pins 1, 2, 4, 5, 9, 10 and 11-14 are inferred from function labels and the sect"+ ],+ "pages_sent": 18,+ "cost_usd": 0.079,+ "at": "2026-10-08T16:31:10"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/uc3524",+ "pages": 18,+ "sha256": "42407e137f08653a",+ "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"+ },+ "models_3d": [+ {+ "file": "uc3524d.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6,+ 9.9,+ 1.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "uc3524d-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 6,+ 9.9,+ 1.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "4e72c338b1a84769771e0a3aebb17b8a6121de1ea498f66362cdf95abcc63a4f",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ }+ ]+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}