component
LR78L09A
Public Unreviewedby Ray
LRC Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Symbol & Footprint
Schematic Symbol
Open full view ↗PCB Footprint
Open full view ↗Datasheet
Open in new tab ↗README
markdownLR78L09A
LRC · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89
LR78L09A from LRC, in a SOT-89. 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. Typical 9.0 V (min 8.64 V, max 9.36 V at Tj=25°C). Supplies up to 100 mA. A 0.1 µF bypass capacitor to GND close to the pin is recommended for stability and transient response. |
| 2 | GND | power_in | Ground / common return. On SOT-89 this pin is electrically tied to the large center tab used as the thermal pad. |
| 3 | Vin | power_in | Unregulated input voltage. Absolute max 30 V for the 9 V option; recommended range 11.5 V to 24 V. Dropout ~1.7 V typical. A 0.33 µF bypass capacitor to GND close to the pin is recommended. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | LRC |
| Package | SOT-89 |
| Category | PMIC |
| Pins | 3 |
Ordering variants
Same part, different packaging or reel option.
LR78L09ALR78L09B
CAD (KiCad official)
- Symbol:
LR78L09A - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LRC datasheet (8 pp, sha256
e540f0f8c27d9693, retrieved 2026-08-17, tier: lcsc) - 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).