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LDL1117S25R

Public Made by Adom

by adom

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

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
Name Last commit message Last updated
docs ldl1117s25r: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · 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
ldl1117s25r-etched.fit.json ldl1117s25r: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
ldl1117s25r-etched.glb ldl1117s25r: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray
ldl1117s25r-etched.step ldl1117s25r: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray
ldl1117s25r-hero.glb Publish 0.1.1 · Ray
ldl1117s25r-hero.overlay.json Publish 0.1.1 · Ray
ldl1117s25r.glb Publish 0.1.0 · Ray
ldl1117s25r.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
ldl1117s25r.kicad_sym Publish 0.1.0 · Ray
ldl1117s25r.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
ldl1117s25r.step Publish 0.1.0 · Ray
package.json Publish 0.1.1 · 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 0.1.1 · Ray
README.md ldl1117s25r: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

LDL1117S25R

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

LDL1117S25R from STMicroelectronics, 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 GND power_in Ground reference for the regulator. Common return for both input and output currents.
2 VOUT power_out Regulated fixed output voltage (2.5 V for LDL1117S25R). Delivers up to 1.2 A; requires a 4.7 µF output capacitor for stability. Internally tied to the SOT-223 tab.
3 VIN power_in Unregulated input supply, 2.5 V to 18 V (20 V AMR). Requires a 1 µF input capacitor close to the pin.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • LDL1117S25R

CAD (KiCad official)

  • Symbol: LDL1117S25R
  • Footprint: Package_TO_SOT_SMD:SOT-223
  • 3D model: SOT-223-4 (KiCad packages3D, STEP)
  • 3D model files: ldl1117s25r-etched.step / ldl1117s25r-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ldl1117s25r.step / ldl1117s25r.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (23 pp, sha256 0533b5ea67d7b205, 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