L78L05ACZTR

@@ -0,0 +1,47 @@+# L78L05ACZTR++**STMicroelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-92-2.54mm++L78L05ACZTR from STMicroelectronics, in a TO-92-2.54mm. 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 +5 V output pin, capable of sourcing up to 100 mA. A 0.1 µF ceramic capacitor to GND is recommended for output stability and transient response. |+| 2 | GND | power_in | Common ground reference for the input and output. On SOT-89 this pin is also the thermal tab, so PCB copper area on this pin dominates junction-to-ambient thermal performance (RthJA ≈ 55 °C/W with 6 cm² Cu). |+| 3 | VIN | power_in | Unregulated positive input voltage. Absolute maximum 30 V for the 5 V output variant; typical operating range gives >2 V of dropout headroom above VOUT. A 0.33 µF input capacitor to GND is recommended, especially if the regulator is located far from the bulk supply capacitor. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STMicroelectronics |+| Package | TO-92-2.54mm |+| Category | PMIC |+| Pins | 3 |++## Ordering variants++- `L78L05ACZTRZTR`+- `L78L05ACZTRZ`+- `L78L05ACZTRAZ`+- `L78L05ACZTRACZ`+- `L78L05ACZTRD`+- `L78L05ACZTRD13TR`++## CAD (KiCad official)++- Symbol: `L78L05ACZTR`+- Footprint: `Package_TO_SOT_THT:TO-92_Inline`+- 3D model: TO-92-2.54mm (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/l78l05acztr.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/l78l05acztr-datasheet.pdf)

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