component
L78L09ABZ
Public Made by Adomby adom
STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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L78L09ABZ
STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-92
L78L09ABZ from STMicroelectronics, in a TO-92. 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 9 V output (8.64 to 9.36 V at 25 °C for the A grade), delivering up to 100 mA, with a 0.1 µF output capacitor used in the test circuit. |
| 2 | GND | power_in | Ground reference common to input and output; quiescent current is 6 mA max at 25 °C. |
| 3 | VIN | power_in | Unregulated input voltage, absolute maximum 30 V for 3.3 to 9 V output versions, with a 0.33 µF input capacitor used in the test circuit. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | TO-92 |
| Category | Power Management (PMIC) |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
L78L09ABZ - Footprint:
Package_TO_SOT_THT:TO-92_Inline - 3D model: TO-92 (KiCad packages3D, STEP)
- Annotated 3D hero:
l78l09abz-hero.glb(dashed pad outlines, silkscreen with pin 1, signal names; the adom-hero standard) is what the viewer shows. Downloads and EDA use the clean model,l78l09abz-etched.glb. - 3D model files:
l78l09abz-etched.step/l78l09abz-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);l78l09abz.step/l78l09abz.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (40 pp, sha256
8b73c521b7f1b36e, retrieved 2026-10-02, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-5-5(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).
# L78L09ABZ
**STMicroelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-92
L78L09ABZ from STMicroelectronics, in a TO-92. 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 9 V output (8.64 to 9.36 V at 25 °C for the A grade), delivering up to 100 mA, with a 0.1 µF output capacitor used in the test circuit. |
| 2 | GND | power_in | Ground reference common to input and output; quiescent current is 6 mA max at 25 °C. |
| 3 | VIN | power_in | Unregulated input voltage, absolute maximum 30 V for 3.3 to 9 V output versions, with a 0.33 µF input capacitor used in the test circuit. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | TO-92 |
| Category | Power Management (PMIC) |
| Pins | 3 |
## CAD (KiCad official)
- Symbol: `L78L09ABZ`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92 (KiCad packages3D, STEP)
- Annotated 3D hero: `l78l09abz-hero.glb` (dashed pad outlines, silkscreen with pin 1, signal names; the [adom-hero standard](https://wiki.adom.inc/adom/component-hero)) is what the viewer shows. Downloads and EDA use the clean model, `l78l09abz-etched.glb`.
- 3D model files: `l78l09abz-etched.step` / `l78l09abz-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `l78l09abz.step` / `l78l09abz.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590918754786631681) (40 pp, sha256 `8b73c521b7f1b36e`, retrieved 2026-10-02, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-5-5` (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).
[Datasheet PDF](docs/l78l09abz-datasheet.pdf)