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LDL1117S25R

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by Ray

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

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Datasheet

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Contents

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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)

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