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LD1117DT33CTR

Public Made by Adom

by adom

STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, DPAK. 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 ld1117dt33ctr: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain… · Ray
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
ld1117dt33ctr-etched.fit.json ld1117dt33ctr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
ld1117dt33ctr-etched.glb ld1117dt33ctr: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain… · Ray
ld1117dt33ctr-etched.step ld1117dt33ctr: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain… · Ray
ld1117dt33ctr-hero.glb Publish 0.2.1 · Ray
ld1117dt33ctr-hero.overlay.json Publish 0.2.1 · Ray
ld1117dt33ctr.glb Publish 0.1.0 · Ray
ld1117dt33ctr.kicad_mod Publish 0.1.0 · Ray
ld1117dt33ctr.kicad_sym Publish 0.1.0 · Ray
ld1117dt33ctr.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
ld1117dt33ctr.step Publish 0.1.0 · Ray
package.json Publish 0.2.1 · Ray
pads.json page.json: fold the "TAB" entry into pin 2. On TO-252-2 the tab is not a separate pad - it is that lead - so nothing wa… · Ray
page.json Publish 0.2.1 · Ray
README.md ld1117dt33ctr: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

LD1117DT33CTR

STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · DPAK

LD1117DT33CTR from STMicroelectronics, in a DPAK. 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 return for the regulator. On the fixed-voltage (LD1117-33) versions this pin serves as the device ground; on the adjustable LD1117 the same pin is the ADJ (feedback) input tied to VREF = 1.25 V.
2 VOUT power_out Regulated 3.3 V output. Supplies up to 800 mA (typ. 950 mA, max 1300 mA) at Vin − Vout = 5 V, TJ = 25 °C. A minimum 10 µF output capacitor is required for loop stability.
3 VIN power_in Unregulated DC input supply. Operating input voltage up to 15 V; absolute maximum 15 V (18 V permitted only when IOUT < 20 mA). A 100 nF input decoupling capacitor is recommended.
TAB VOUT power_out Exposed metal tab used as the primary thermal path. Electrically connected to VOUT internally, so any heatsink/copper pour on the tab is at the regulated output potential (not ground).

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package DPAK
Category PMIC
Pins 4

Ordering variants

Same part, different packaging or reel option.

  • LD1117DT33CTR
  • LD1117DT33TR
  • LD1117DT33CTRS33TR
  • LD1117DT33CTRS33CTR
  • LD1117DT33CTRV33
  • LD1117DT33CTRV33C
  • LD1117DT33CTRD33TR
  • LD1117DT33CTRD33CTR

CAD (KiCad official)

  • Symbol: LD1117DT33CTR
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: DPAK (KiCad packages3D, STEP)
  • 3D model files: ld1117dt33ctr-etched.step / ld1117dt33ctr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ld1117dt33ctr.step / ld1117dt33ctr.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
ld1117dt33ctr.step 119 KB You want the bare part, or you mark your own boards.
ld1117dt33ctr-etched.step 1.9 MB You want the part with LD1117DT33CTR already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 506 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: STMicroelectronics datasheet (46 pp, sha256 eb9bdaeee6a99a12, 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