component
ST1S12G18R
Public Made by Adomby adom
STMicroelectronics DC-DC Converters, TSOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownST1S12G18R
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);st1s12g18r.step/st1s12g18r.glbare 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, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).