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l78l12acd13tr
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STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
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markdownL78L12ACD13TR
STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOIC-8
L78L12ACD13TR 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 +12 V output (VO). Typ 12 V, tolerance ±4% (11.5-12.5 V at TJ=25 °C). Deliver up to 100 mA with adequate heat-sinking; a 0.1 µF ceramic capacitor to GND is recommended for stability. |
| 2 | GND | power_in | Ground / common reference. Internally connected to the die-attach flag together with pins 3, 6 and 7 to reduce thermal resistance; must be tied to the PCB ground plane for both return current and heat-sinking. |
| 3 | GND | power_in | Ground / common reference. Internally connected to the die-attach flag together with pins 2, 6 and 7 to reduce thermal resistance; must be tied to the PCB ground plane. |
| 4 | NC | unconnected | No internal connection. Leave floating or tie to GND on the PCB per user preference. |
| 5 | NC | unconnected | No internal connection. Leave floating or tie to GND on the PCB per user preference. |
| 6 | GND | power_in | Ground / common reference. Internally connected to the die-attach flag together with pins 2, 3 and 7 to reduce thermal resistance; must be tied to the PCB ground plane. |
| 7 | GND | power_in | Ground / common reference. Internally connected to the die-attach flag together with pins 2, 3 and 6 to reduce thermal resistance; must be tied to the PCB ground plane. |
| 8 | VIN | power_in | Unregulated positive supply input (VI). Recommended operating range 14.5-27 V for the 12 V variant; absolute maximum 35 V. Bypass to GND with a 0.33 µF capacitor close to the pin, especially when located far from the bulk filter. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOIC-8 |
| Category | PMIC |
| Pins | 8 |
Ordering variants
L78L12ACD13TRL78L12ACD13TRL78L12ABD-TRL78L12ACD13TRL78L12CD13TRL78L12ACD13TRL78L12ABZL78L12ACD13TRL78L12ACZL78L12ACD13TRL78L12ABZ-APL78L12ACD13TRL78L12ACZ-APL78L12ACD13TRL78L12ACZ-TRL78L12ACD13TRL78L12ABUTRL78L12ACD13TRL78L12ACUTR
CAD (KiCad official)
- Symbol:
L78L12ACD13TR - 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 (None 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).