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78D09L

Public Made by Adom

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UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs 78d09l: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 19d 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
78d09l-etched.fit.json 78d09l: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
78d09l-etched.glb 78d09l: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 19d ago
78d09l-etched.step 78d09l: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 19d ago
78d09l.glb Publish 0.1.0 · Ray 2mo ago
78d09l.kicad_mod Publish 0.1.0 · Ray 2mo ago
78d09l.kicad_sym Publish 0.1.0 · Ray 2mo ago
78d09l.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
78d09l.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 78d09l: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 19d ago
README.md 78d09l: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 1mo ago

78D09L

UMW · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252

78D09L from UMW, in a TO-252. 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 INPUT power_in Unregulated DC input supply. For a 9 V output, typical VI = 15 V (recommended VI range 11.5-24 V, absolute max 35 V). A 0.33 µF input bypass capacitor to GND is recommended close to the pin.
2 GND power_in Common ground / reference for both input and output. On the TO-252 package this pin is electrically common with the exposed thermal tab, which also serves as the primary heat-sink pad.
3 OUTPUT power_out Regulated +9 V output, up to 1 A load current (VO typ 9 V, 8.64-9.36 V at 25 °C). A 0.1 µF output capacitor to GND close to the pin is recommended for stability. Internally protected against short circuit (~800 mA into a shorted load) and thermal overload.

Key specifications

Parameter Value
Manufacturer UMW
Package TO-252
Category PMIC
Pins 3

Ordering variants

  • 78D09LL

CAD (KiCad official)

  • Symbol: 78D09L
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252 (KiCad packages3D, STEP)
  • 3D model files: 78d09l-etched.step / 78d09l-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 78d09l.step / 78d09l.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
78d09l.step 119 KB You want the bare part, or you mark your own boards.
78d09l-etched.step 1.3 MB You want the part with 78D09L already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 332 faces against 83 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: UMW datasheet (15 pp, sha256 0816f246cc64ec64, 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