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LD1117S12CTR

Public Made by Adom

by adom

STMicroelectronics Dropout Regulators(LDO), SOT-223. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpower management icsld1117s12ctr
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Datasheet

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Contents

README

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LD1117S12CTR

STMicroelectronics · Dropout Regulators(LDO) · SOT-223

LD1117S12CTR from STMicroelectronics, in a SOT-223. 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 / common return for the regulator. Reference for both VIN and VOUT.
2 VOUT power_out Regulated 1.2 V fixed output (±1% at 25 °C), up to 800 mA. Requires a minimum 10 µF output capacitor for loop stability. Electrically common with the tab.
3 VIN power_in Unregulated input supply. Must be at least VOUT + Vdropout (~1 V typ.) above VOUT. Absolute maximum 15 V.
TAB VOUT power_out Thermal tab, electrically connected to VOUT. Used both for heat dissipation and as the regulated output node.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package SOT-223
Category Power Management ICs
Pins 4

Ordering variants

Same part, different packaging or reel option.

  • LD1117S12CTR
  • LD1117S12CTRV12
  • LD1117S12CTRDT12
  • LD1117S12CTRD12

CAD (KiCad official)

  • Symbol: LD1117S12CTR
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223 (KiCad packages3D, STEP)
  • 3D model files: ld1117s12ctr-etched.step / ld1117s12ctr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ld1117s12ctr.step / ld1117s12ctr.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (44 pp, sha256 1b80923ec6ca9161, 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