component

LD1117-ADJ

Public Made by Adom

by adom

UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-4. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

componentpmicld1117-adj
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 ld1117-adj: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STE… · Ray
viewers fix footprint: SOT-223 -> SOT-223-3_TabPin2 (symbol has pins 1,2,3; the old footprint left pad(s) 4 with no net) · Ray
ld1117-adj-etched.fit.json ld1117-adj: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
ld1117-adj-etched.glb ld1117-adj: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STE… · Ray
ld1117-adj-etched.step ld1117-adj: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STE… · Ray
ld1117-adj-hero.glb Publish 0.2.1 · Ray
ld1117-adj-hero.overlay.json Publish 0.2.1 · Ray
ld1117-adj.glb Publish 0.1.0 · Ray
ld1117-adj.kicad_mod fix footprint: SOT-223 -> SOT-223-3_TabPin2 (symbol has pins 1,2,3; the old footprint left pad(s) 4 with no net) · Ray
ld1117-adj.kicad_sym Publish 0.1.0 · Ray
ld1117-adj.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
ld1117-adj.step Publish 0.1.0 · Ray
package.json Publish 0.2.1 · Ray
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
page.json Publish 0.2.1 · Ray
README.md ld1117-adj: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

LD1117-ADJ

UMW · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-4

LD1117-ADJ from UMW, in a SOT-223-4. 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 ADJ input Adjust pin. Connect to the tap of an external R1/R2 divider from VOUT to GND to set the output voltage. Internal reference is 1.250V (typ, 1.231-1.269V); adjust pin current is 60µA typ (120µA max).
2 VOUT power_out Regulated output. Delivers up to 1A. Requires a >=22µF tantalum output capacitor for stability. Output tab (metal pad) on SOT-223 is electrically connected to VOUT.
3 VIN power_in Unregulated input supply. Absolute max 18V; recommended operating input 12V max. Requires >=10µF input capacitor. VIN must be at least VOUT + Vdropout (typ 1.2V at 1A).

Key specifications

Parameter Value
Manufacturer UMW
Package SOT-223-4
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • LD1117-ADJ

The extractor listed these alongside LD1117-ADJ, but they are different parts with different electrical characteristics. Do not order them as substitutes.

  • LD1117-ADJCD-ADJ
  • LD1117-ADJS-ADJ

CAD (KiCad official)

  • Symbol: LD1117-ADJ
  • Footprint: Package_TO_SOT_SMD:SOT-223
  • 3D model: SOT-223-4 (KiCad packages3D, STEP)
  • 3D model files: ld1117-adj-etched.step / ld1117-adj-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ld1117-adj.step / ld1117-adj.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
ld1117-adj.step 64 KB You want the bare part, or you mark your own boards.
ld1117-adj-etched.step 1.1 MB You want the part with LD1117-ADJ already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 306 faces against 75 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 (14 pp, sha256 b65a8249b6e9e313, 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