component

ST1S12G18R

Public Made by Adom

by adom

STMicroelectronics DC-DC Converters, TSOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management (pmic)st1s12g18rfactory-2.0.0extractor-text
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ST1S12G18R

STMicroelectronics · DC-DC Converters · TSOT-23-5

ST1S12G18R from STMicroelectronics, in a TSOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 EN input Enable input pin; device turns ON when EN ≥ 1.5V and OFF when EN ≤ 0.5V within VIN operating range of 2.5V to 5.5V.
2 GND power_in System ground and common reference voltage for all internal and external circuits.
3 SW output Internal MOSFET switching output pin for step-down inductor connection; voltage rating -0.3V to VIN + 0.3V.
4 VIN power_in Positive power supply input pin; minimum operating voltage 2.5V, absolute maximum rating 6.5V.
5 FB/VO output Feedback voltage/output reference pin providing internal 1.8V fixed reference (nominal 1.8V, range 1.746V to 1.854V over -40°C to 125°C) for the G18R fixed-output variant.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package TSOT-23-5
Category Power Management (PMIC)
Pins 5

CAD (KiCad official)

  • Symbol: ST1S12G18R
  • Footprint: Package_TO_SOT_SMD:TSOT-23-5
  • 3D model: TSOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: st1s12g18r-etched.step / st1s12g18r-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); st1s12g18r.step / st1s12g18r.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (20 pp, sha256 6e911e5bce170a9f, retrieved 2026-10-07, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF