component

L78L12A

Public Made by Adom

by 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.

componentpower management (pmic)l78l12afactory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.

Symbol & Footprint

Schematic Symbol

Open full view ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.

PCB Footprint

Open full view ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.

Datasheet

Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Download PDF
Contents

README

markdown

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); l78l12a.step / l78l12a.glb are 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, 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