component
L78L12A
Public Made by Adomby adom
UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Generated by kicad-footprint-generator · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 17d ago |
| viewers | 17d ago |
| l78l12a-etched.glb | 17d ago |
| l78l12a-etched.step | 17d ago |
| l78l12a-hero.glb | 17d ago |
| l78l12a-hero.overlay.json | 17d ago |
| l78l12a.glb | 17d ago |
| l78l12a.kicad_mod | 17d ago |
| l78l12a.kicad_sym | 17d ago |
| l78l12a.lbr | 17d ago |
| l78l12a.step | 17d ago |
| package.json | 17d ago |
| page.json | 17d ago |
| README.md | 17d ago |
L78L12A
UMW · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOP-8
L78L12A from UMW, in a SOP-8. 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 | OUTPUT | power_out | Regulated 12V output of the 78L12A, rated for up to 100mA maximum output current, with a 0.1µF output capacitor recommended. |
| 2 | GND | power_in | Ground pin, internally common with the other GND pins (2, 3, 6, 7) of the SOP-8 package. |
| 3 | GND | power_in | Ground pin, internally common with the other GND pins (2, 3, 6, 7) of the SOP-8 package. |
| 4 | NC | unconnected | No connection. |
| 5 | NC | unconnected | No connection. |
| 6 | GND | power_in | Ground pin, internally common with the other GND pins (2, 3, 6, 7) of the SOP-8 package. |
| 7 | GND | power_in | Ground pin, internally common with the other GND pins (2, 3, 6, 7) of the SOP-8 package. |
| 8 | INPUT | power_in | Unregulated supply input, absolute maximum 35V for output voltages of 3.3 to 18V, with a 0.33µF input capacitor recommended. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output voltage (A grade, TJ=25°C) | VO | 11.76 | 12 | 12.24 | V | TJ=25°C | 9 |
| Output voltage (A grade, line range, IO=1mA~40mA) | VO | 11.64 | 12 | 12.36 | V | 14.5V≤VI≤27V,IO=1mA~40mA | 9 |
| Output voltage (A grade, line range, IO=1mA~70mA) | VO | 11.64 | 12 | 12.36 | V | 14.5V≤VI≤VMAX,IO=1mA~70mA | 9 |
| Quiescent current | Iq | 5.5 | mA | TJ=25°C | 9 | ||
| Quiescent current change (line) | ΔIq | 15 | mA | 16V≤VI≤27V | 9 | ||
| Quiescent current change (load) | ΔIq | 0.1 | mA | 1mA≤IO≤40mA | 9 | ||
| Load regulation | ΔVO | 150 | mV | TJ=25°C, IO=1mA~100mA | 9 | ||
| Load regulation | ΔVO | 75 | mV | TJ=25°C, IO=1mA~70mA | 9 | ||
| Line regulation | ΔVO | 300 | mV | 14.5V ≤VI≤27V,TJ=25°C | 9 | ||
| Line regulation | ΔVO | 250 | mV | 16V ≤VI≤27V,TJ=25°C | 9 | ||
| Input voltage | VI | 35 | V | for VO=3.3 to 18V | 2 | ||
| Junction temperature range | TOPR | -20 | 120 | °C | 2 | ||
| Storage temperature range | TSTG | -55 | 150 | °C | 2 | ||
| Power dissipation | Pd | 400 | mW | SOP-8 package | 2 | ||
| Output noise voltage | VN | 36 | µV | 10Hz ≤f≤100kHz | 9 | ||
| Temperature coefficient of VO | ΔVO/ΔT | 1 | mV/°C | IO=5mA | 9 | ||
| Ripple rejection | RR | 42 | dB | 15V≤VI≤25V,f=120Hz,TJ=25°C | 9 | ||
| Dropout voltage | Vd | 1.7 | V | 9 |
CAD (KiCad official)
- Symbol:
L78L12A - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
l78l12a-etched.step/l78l12a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);l78l12a.step/l78l12a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UMW datasheet (22 pp, sha256
3eeae843c9f51425, retrieved 2026-10-18, 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).