component
UC3526DWTR
Public Made by Adomby adom
Texas Instruments DC-DC Controllers, SOIC-18-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+54@@ -0,0 +1,54 @@+# UC3526DWTR++**Texas Instruments** · DC-DC Controllers · SOIC-18-300mil++UC3526DWTR from Texas Instruments, in a SOIC-18-300mil. 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 | +Error | input | Non-inverting input of the transconductance error amplifier, with input common-mode range of 0 to +5.2V. |+| 2 | -Error | input | Inverting input of the error amplifier, used with +Error for the voltage feedback connection to the supply output. |+| 3 | Comp | output | Error amplifier output (2MΩ output impedance) where loop compensation is connected as shunt reactance to ground, feeding the PWM comparator. |+| 4 | Css | passive | Soft-start capacitor connection, charged by an internal 100µA current source after RESET goes HIGH and held discharged during undervoltage lockout. |+| 5 | Reset | bidirectional | Active-LOW TTL/CMOS-compatible digital port that discharges the soft-start capacitor when held LOW and is held LOW by undervoltage lockout. |+| 6 | -Current Sense | input | Inverting input of the current limit comparator, with a typical 100mV sense voltage threshold. |+| 7 | +Current Sense | input | Non-inverting input of the current limit comparator, with a typical 100mV sense voltage threshold. |+| 8 | Shutdown | bidirectional | Active-LOW TTL/CMOS-compatible digital port that immediately inhibits all PWM output pulses when pulled LOW. |+| 9 | RTIMING | passive | Oscillator timing resistor connection, with recommended RT of 2kΩ to 150kΩ. |+| 10 | CT | passive | Oscillator timing capacitor connection (recommended 1nF to 20µF) that carries the sawtooth waveform and is tied together across devices for synchronization. |+| 11 | RD | passive | Deadtime setting resistor connection to ground, where a larger value adds dead time (400ns/Ω at 40kHz) and 0Ω gives minimum dead time. |+| 12 | Sync | bidirectional | Active-LOW TTL/CMOS-compatible digital port that initiates an oscillator discharge cycle when driven LOW and provides the logic clock for synchronizing multiple devices. |+| 13 | Output A | output | Totem-pole output driver A that sources and sinks 100mA continuously (200mA peak) at half the oscillator frequency. |+| 14 | VC | power_in | Collector supply voltage for the output drivers, recommended +4.5V to +35V (absolute maximum +40V). |+| 15 | Ground | power_in | Ground connection for the device. |+| 16 | Output B | output | Totem-pole output driver B that sources and sinks 100mA continuously (200mA peak) at half the oscillator frequency. |+| 17 | +VIN | power_in | Input supply voltage, recommended +8V to +35V (absolute maximum +40V). |+| 18 | VREF | power_out | Temperature-compensated 5.0V reference output providing 0 to 20mA of load current. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-18-300mil |+| Category | Power Supply Chip |+| Pins | 18 |++## CAD (KiCad official)++- Symbol: `UC3526DWTR`+- Footprint: `Package_SO:SOIC-18W_7.5x11.6mm_P1.27mm`+- 3D model: SOIC-18-300mil (KiCad packages3D, STEP)+- 3D model files: `uc3526dwtr-etched.step` / `uc3526dwtr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `uc3526dwtr.step` / `uc3526dwtr.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/uc3526) (11 pp, sha256 `610c26f9ef74514c`, retrieved 2026-10-08, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/uc3526dwtr-datasheet.pdf)
page.jsonadded+261@@ -0,0 +1,261 @@+{+ "slug": "uc3526dwtr",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments DC-DC Controllers, SOIC-18-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "power supply chip",+ "uc3526dwtr",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "uc3526dwtr.kicad_sym",+ "uc3526dwtr.kicad_mod",+ "uc3526dwtr.glb",+ "uc3526dwtr.step",+ "uc3526dwtr.lbr",+ "docs/hero.png",+ "docs/uc3526dwtr-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html",+ "uc3526dwtr-hero.glb",+ "uc3526dwtr-hero.overlay.json"+ ],+ "component": {+ "mpn": "UC3526DWTR",+ "manufacturer": "Texas Instruments",+ "package": "SOIC-18-300mil",+ "pin_count": 18,+ "category": "Power Supply Chip",+ "subcategory": "DC-DC Controllers",+ "datasheet": "https://www.ti.com/cn/lit/gpn/uc3526",+ "parts": {+ "symbol": "uc3526dwtr.kicad_sym",+ "footprint": "uc3526dwtr.kicad_mod",+ "model_3d": "uc3526dwtr-hero.glb",+ "model_3d_plain": "uc3526dwtr.glb",+ "model_3d_step": "uc3526dwtr-etched.step",+ "model_3d_step_plain": "uc3526dwtr.step",+ "lbr": "uc3526dwtr.lbr"+ },+ "distributor_links": {+ "lcsc": "C2658531",+ "digikey": "296-UC3526DWTR-ND",+ "mouser": "595-UC3526DWTR"+ },+ "distributor_check": {+ "checked_at": "2026-10-08T20:57:25Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "296-UC3526DWTR-ND",+ "status": "found",+ "lifecycle": "Active"+ },+ "mouser": {+ "pn": "595-UC3526DWTR",+ "status": "found"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "+Error",+ "type": "input",+ "description": "Non-inverting input of the transconductance error amplifier, with input common-mode range of 0 to +5.2V."+ },+ {+ "number": "2",+ "name": "-Error",+ "type": "input",+ "description": "Inverting input of the error amplifier, used with +Error for the voltage feedback connection to the supply output."+ },+ {+ "number": "3",+ "name": "Comp",+ "type": "output",+ "description": "Error amplifier output (2MΩ output impedance) where loop compensation is connected as shunt reactance to ground, feeding the PWM comparator."+ },+ {+ "number": "4",+ "name": "Css",+ "type": "passive",+ "description": "Soft-start capacitor connection, charged by an internal 100µA current source after RESET goes HIGH and held discharged during undervoltage lockout."+ },+ {+ "number": "5",+ "name": "Reset",+ "type": "bidirectional",+ "description": "Active-LOW TTL/CMOS-compatible digital port that discharges the soft-start capacitor when held LOW and is held LOW by undervoltage lockout."+ },+ {+ "number": "6",+ "name": "-Current Sense",+ "type": "input",+ "description": "Inverting input of the current limit comparator, with a typical 100mV sense voltage threshold."+ },+ {+ "number": "7",+ "name": "+Current Sense",+ "type": "input",+ "description": "Non-inverting input of the current limit comparator, with a typical 100mV sense voltage threshold."+ },+ {+ "number": "8",+ "name": "Shutdown",+ "type": "bidirectional",+ "description": "Active-LOW TTL/CMOS-compatible digital port that immediately inhibits all PWM output pulses when pulled LOW."+ },+ {+ "number": "9",+ "name": "RTIMING",+ "type": "passive",+ "description": "Oscillator timing resistor connection, with recommended RT of 2kΩ to 150kΩ."+ },+ {+ "number": "10",+ "name": "CT",+ "type": "passive",+ "description": "Oscillator timing capacitor connection (recommended 1nF to 20µF) that carries the sawtooth waveform and is tied together across devices for synchronization."+ },+ {+ "number": "11",+ "name": "RD",+ "type": "passive",+ "description": "Deadtime setting resistor connection to ground, where a larger value adds dead time (400ns/Ω at 40kHz) and 0Ω gives minimum dead time."+ },+ {+ "number": "12",+ "name": "Sync",+ "type": "bidirectional",+ "description": "Active-LOW TTL/CMOS-compatible digital port that initiates an oscillator discharge cycle when driven LOW and provides the logic clock for synchronizing multiple devices."+ },+ {+ "number": "13",+ "name": "Output A",+ "type": "output",+ "description": "Totem-pole output driver A that sources and sinks 100mA continuously (200mA peak) at half the oscillator frequency."+ },+ {+ "number": "14",+ "name": "VC",+ "type": "power_in",+ "description": "Collector supply voltage for the output drivers, recommended +4.5V to +35V (absolute maximum +40V)."+ },+ {+ "number": "15",+ "name": "Ground",+ "type": "power_in",+ "description": "Ground connection for the device."+ },+ {+ "number": "16",+ "name": "Output B",+ "type": "output",+ "description": "Totem-pole output driver B that sources and sinks 100mA continuously (200mA peak) at half the oscillator frequency."+ },+ {+ "number": "17",+ "name": "+VIN",+ "type": "power_in",+ "description": "Input supply voltage, recommended +8V to +35V (absolute maximum +40V)."+ },+ {+ "number": "18",+ "name": "VREF",+ "type": "power_out",+ "description": "Temperature-compensated 5.0V reference output providing 0 to 20mA of load current."+ }+ ],+ "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": "text+vision",+ "consensus_model": "claude-opus-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "extractor flagged: The extracted text only listed the PLCC-20/LCC-20 pin table, which uses different numbering. The SOI",+ "vision extraction: provenance cannot be text-verified; needs consensus"+ ],+ "pages_sent": 11,+ "cost_usd": 0.4084,+ "at": "2026-10-08T20:57:08"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/uc3526",+ "pages": 11,+ "sha256": "610c26f9ef74514c",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 18,+ "described": 18,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ },+ "models_3d": [+ {+ "file": "uc3526dwtr.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 10.3,+ 11.55,+ 2.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "05ad7d4945131c76ec7b9448dd9cbb5376b56adcd564c58d93e50ca7870fab1f",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "uc3526dwtr-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "z = 0",+ "extents_mm": [+ 10.3,+ 11.55,+ 2.75+ ],+ "zmin_mm": 0,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "0464195422425381b35237b4411806ce5a2cedcf5cac86d46d3d59050a2651ed",+ "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]"+ }+}