L78L33ACD13TR

@@ -0,0 +1,54 @@+# L78L33ACD13TR++**STMicroelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOIC-8++L78L33ACD13TR from STMicroelectronics, in a SOIC-8. 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 DC output (typ. 3.3 V, min 2.97 V, max 3.63 V over 1-70 mA). Requires a 0.1 uF ceramic output capacitor to ground for stability. Delivers up to 100 mA. |+| 2 | GND | power_in | Ground reference. In the SO-8 package pins 2, 3, 6 and 7 are internally commoned to the die attach flag to improve thermal dissipation; all four should be tied to the ground plane with a copper heat-sink area (approx. 6 cm^2) for the specified thermal resistance. |+| 3 | GND | power_in | Ground / thermal pad connection. Internally commoned to the die attach flag together with pins 2, 6 and 7. |+| 4 | NC | unconnected | No internal connection. Leave floating or tie to ground for lowest parasitic coupling. |+| 5 | NC | unconnected | No internal connection. Leave floating or tie to ground for lowest parasitic coupling. |+| 6 | GND | power_in | Ground / thermal pad connection. Internally commoned to the die attach flag together with pins 2, 3 and 7. |+| 7 | GND | power_in | Ground / thermal pad connection. Internally commoned to the die attach flag together with pins 2, 3 and 6. |+| 8 | VIN | power_in | Unregulated DC input. Absolute maximum 30 V for 3.3 V output variants; recommended operating range 5.3 V to 20 V (dropout typ. 2 V). A 0.33 uF ceramic input capacitor to ground is required close to the pin when the device is far from the bulk filter capacitor. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STMicroelectronics |+| Package | SOIC-8 |+| Category | PMIC |+| Pins | 8 |++## Ordering variants++- `L78L33ACD13TRD`+- `L78L33ACD13TRD-TR`+- `L78L33ACD13TRD13TR`+- `L78L33ACD13TRZ`+- `L78L33ACD13TRAZ`+- `L78L33ACD13TRACZ`+- `L78L33ACD13TRCD`+- `L78L33ACD13TRACUTR`++## CAD (KiCad official)++- Symbol: `L78L33ACD13TR`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/l78l33acd13tr.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/l78l33acd13tr-datasheet.pdf)

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