component

78L09

Public Made by Adom

by adom

TWGMC Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

componentpmic78l09
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
Download ZIP Propose a change
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
Name Last commit message Last updated
docs 78l09: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 2mo ago
78l09-etched.fit.json 78l09: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
78l09-etched.glb 78l09: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
78l09-etched.step 78l09: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
78l09.glb Publish 0.1.0 · Ray 2mo ago
78l09.kicad_mod Publish 0.1.0 · Ray 2mo ago
78l09.kicad_sym Publish 0.1.0 · Ray 2mo ago
78l09.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray 2mo ago
78l09.step Publish 0.1.0 · Ray 2mo ago
package.json Publish 0.2.0 · Ray 2mo ago
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 2mo ago
page.json 78l09: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 28d ago
README.md 78l09: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 1mo ago

78L09

TWGMC · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89

78L09 from TWGMC, in a SOT-89. 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 OUT power_out Regulated positive output, nominal +9 V (8.64 - 9.36 V at Tj = 25 °C). Deliverable output current up to ~100 mA. A 0.1 µF ceramic output capacitor to GND is recommended for stability.
2 GND power_in Common ground / reference return for both the input and output sides of the regulator.
3 IN power_in Unregulated positive input supply. Absolute max 35 V; typical operating range 11.4 V - 24 V for a regulated 9 V output. A 0.33 µF input capacitor to GND is recommended when the regulator is located far from the bulk supply filter.

Key specifications

Parameter Value
Manufacturer TWGMC
Package SOT-89
Category PMIC
Pins 3

CAD (KiCad official)

  • Symbol: 78L09
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89 (KiCad packages3D, STEP)
  • 3D model files: 78l09-etched.step / 78l09-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 78l09.step / 78l09.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
78l09.step 57 KB You want the bare part, or you mark your own boards.
78l09-etched.step 974 KB You want the part with 78L09 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 258 faces against 42 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: TWGMC datasheet (2 pp, sha256 cc83a993874b173a, retrieved 2026-08-17, tier: lcsc)
  • 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).

Datasheet PDF