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MC33269ST-3.3T3G
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onsemi Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-4. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.md+40docs/hero.pngdocs/mc33269st-3-3t3g-datasheet.pdf+6533mc33269st-3-3t3g-hero.glbmc33269st-3-3t3g-hero.overlay.json+172mc33269st-3-3t3g.glbmc33269st-3-3t3g.kicad_mod+251mc33269st-3-3t3g.kicad_sym+29mc33269st-3-3t3g.lbr+115mc33269st-3-3t3g.step+1581package.json+169page.json+175viewers/footprint.html+1viewers/symbol.html+1README.mdadded+40@@ -0,0 +1,40 @@+# MC33269ST-3.3T3G++**onsemi** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-4++MC33269ST-3.3T3G from onsemi, in a SOT-223-4. 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 | GND/Adj | power_in | Ground reference terminal for the fixed 3.3 V version; the datasheet labels this pin GND/Adj, and the Adj function applies only to the adjustable versions. |+| 2 | Vout | power_out | Regulated 3.3 V output (3.27 V to 3.33 V at 10 mA and 25°C), which needs an output capacitor of at least 10 µF with ESR between 0.2 Ω and 10 Ω for stability. |+| 3 | Vin | power_in | Unregulated input supply with a maximum rating of 20 V; a bypass capacitor of 0.33 µF or larger is recommended for transient response. |+| 4 | Vout | power_out | Heatsink surface shown as terminal 4 in the case outline, internally connected to pin 2 (Vout), so it carries the regulated output potential. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | onsemi |+| Package | SOT-223-4 |+| Category | Power Management (PMIC) |+| Pins | 4 |++## CAD (KiCad official)++- Symbol: `MC33269ST-3.3T3G`+- Footprint: `Package_TO_SOT_SMD:SOT-223`+- 3D model: SOT-223-4 (KiCad packages3D, STEP)+- 3D model files: `mc33269st-3-3t3g-etched.step` / `mc33269st-3-3t3g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mc33269st-3-3t3g.step` / `mc33269st-3-3t3g.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [onsemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603039296177778688) (15 pp, sha256 `f3d4e0daaeb2cc5e`, retrieved 2026-10-09, 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/mc33269st-3-3t3g-datasheet.pdf)
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