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LDL1117S33R

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 ldl1117s33r: 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
ldl1117s33r-etched.fit.json ldl1117s33r: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
ldl1117s33r-etched.glb ldl1117s33r: 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
ldl1117s33r-etched.step ldl1117s33r: 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
ldl1117s33r-hero.glb Publish 0.2.1 · Ray
ldl1117s33r-hero.overlay.json Publish 0.2.1 · Ray
ldl1117s33r.glb Publish 0.1.0 · Ray
ldl1117s33r.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
ldl1117s33r.kicad_sym Publish 0.1.0 · Ray
ldl1117s33r.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
ldl1117s33r.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 ldl1117s33r: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

LDL1117S33R

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

LDL1117S33R 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 Device ground return. Sets the reference for the internal bandgap and feedback divider; connect directly to the system ground plane close to the input/output bypass capacitors.
2 VOUT power_out Regulated output voltage (3.3 V for LDL1117S33R). Delivers up to 1.2 A; requires a minimum 4.7 µF output capacitor for stability. The SOT-223 tab is internally connected to this pin and should be tied to the output copper for heatsinking.
3 VIN power_in Unregulated input supply, 2.5 V to 18 V (20 V AMR). Should be bypassed with at least a 1 µF ceramic capacitor placed 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.

  • LDL1117S33R

CAD (KiCad official)

  • Symbol: LDL1117S33R
  • Footprint: Package_TO_SOT_SMD:SOT-223
  • 3D model: SOT-223-4 (KiCad packages3D, STEP)
  • 3D model files: ldl1117s33r-etched.step / ldl1117s33r-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ldl1117s33r.step / ldl1117s33r.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
ldl1117s33r.step 64 KB You want the bare part, or you mark your own boards.
ldl1117s33r-etched.step 1.8 MB You want the part with LDL1117S33R already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 452 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: STMicroelectronics datasheet (20 pp, sha256 387b4375ad125c24, retrieved 2026-08-17, tier: manufacturer)
  • 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