L78L09ABUTR

@@ -0,0 +1,48 @@+# L78L09ABUTR++**STMicroelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3++L78L09ABUTR 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 +9 V output. Sources up to 100 mA with typical dropout of 1.7 V. Bypass to GND with a 0.1 µF ceramic capacitor near the pin. |+| 2 | GND | power_in | Common ground reference for input and output. Also the thermal path in SOT-89 (pin 2 is bonded to the die-attach tab under the package). |+| 3 | VIN | power_in | Unregulated positive input. Absolute maximum DC input voltage is 30 V for the 9 V version. Bypass to GND with a 0.33 µF capacitor to prevent oscillation, especially if the regulator is located far from the raw supply filter. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STMicroelectronics |+| Package | SOT-89-3 |+| Category | PMIC |+| Pins | 3 |++## Ordering variants++- `L78L09ABUTRUTR`+- `L78L09ABUTRAZ`+- `L78L09ABUTRACZ`+- `L78L09ABUTRCZ`+- `L78L09ABUTRD`+- `L78L09ABUTRD-TR`+- `L78L09ABUTRD13TR`++## CAD (KiCad official)++- Symbol: `L78L09ABUTR`+- 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/l78l09abutr.pdf) (46 pp, sha256 `aebc91bfc9b4bb67`, 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/l78l09abutr-datasheet.pdf)

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