component
L78L12ACZ-TR
Public Made by Adomby adom
STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-92-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownL78L12ACZ-TR
STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-92-3
L78L12ACZ-TR from STMicroelectronics, in a TO-92-3. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VOUT | power_out | Regulated 12 V output (11.5 V min, 12.5 V max at TJ=25 °C for AC grade); supplies up to 100 mA with internal current limiting and thermal shutdown; bypass with CO = 0.1 µF. |
| 2 | GND | power_in | Ground reference for the regulator; common return for input and output; dropout voltage from input to output is 1.7 V typ. |
| 3 | VIN | power_in | Unregulated DC input voltage; for VO = 12 V the operating input range is 14.5 V to 27 V (load/line reg.), absolute maximum 35 V; bypass with CI = 0.33 µF. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | TO-92-3 |
| Category | Power Management (PMIC) |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
L78L12ACZ-TR - Footprint:
Package_TO_SOT_THT:TO-92_Inline - 3D model: TO-92-3 (KiCad packages3D, STEP)
- 3D model files:
l78l12acz-tr-etched.step/l78l12acz-tr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);l78l12acz-tr.step/l78l12acz-tr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (40 pp, sha256
8b73c521b7f1b36e, retrieved 2026-09-27, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-sonnet-4-6(text+vision), consensusclaude-opus-4-7(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).