component

LD1117-ADJ

Public Unreviewed

by Ray

UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-4. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpmicld1117-adj
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗

Symbol & Footprint

Schematic Symbol

Open full view ↗

PCB Footprint

Open full view ↗
Contents

README

markdown

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 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