L78L33ABUTR

@@ -0,0 +1,48 @@+# L78L33ABUTR++**STMicroelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3++L78L33ABUTR from STMicroelectronics, in a SOT-89-3. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | VOUT | power_out | Regulated 3.3 V positive output. Nominal 3.3 V (2.97 V min, 3.63 V max over line/load/temperature for L78L33C; +/-4% for L78L33AB). Delivers up to 100 mA with adequate heat-sinking. A 0.1 uF ceramic capacitor to GND is recommended for stability and transient response. |+| 2 | GND | power_in | Common ground reference for both input and output. Also serves as the thermal path; on SOT-89 the tab (pin 2) is bonded to the die attach flag and should be soldered to a copper heat-spreader for the specified 55 C/W junction-to-ambient thermal resistance. |+| 3 | VIN | power_in | Unregulated positive DC input. Operating range approximately Vout + Vdropout (~2 V typ) up to 30 V absolute max for the 3.3 V variant. A 0.33 uF input capacitor to GND is required if the regulator is located far from the input filter capacitor. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STMicroelectronics |+| Package | SOT-89-3 |+| Category | PMIC |+| Pins | 3 |++## Ordering variants++- `L78L33ABUTRUTR`+- `L78L33ABUTRZ`+- `L78L33ABUTRAZ`+- `L78L33ABUTRACZ`+- `L78L33ABUTRD`+- `L78L33ABUTRAD`+- `L78L33ABUTRACD`++## CAD (KiCad official)++- Symbol: `L78L33ABUTR`+- Footprint: `Package_TO_SOT_SMD:SOT-89-3`+- 3D model: SOT-89-3 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/l78l33abutr.pdf) (45 pp, sha256 `43922ae159face7e`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/l78l33abutr-datasheet.pdf)

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