STLQ015M33R from STMicroelectronics, in a SOT-23-5. 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	IN	power_in	Unregulated input supply. Operating range 1.5 V to 5.5 V (absolute max -0.3 V to 7 V). Bypass with a 1 µF ceramic capacitor to GND close to the pin.
2	GND	power_in	Device ground reference. All voltages in the datasheet are referred to this pin.
3	EN	input	Enable input. VEN >= 0.7 V turns the regulator on; VEN <= 0.4 V puts the device in shutdown (IOFF ~1 nA typ). Absolute maximum -0.3 V to VIN+0.3 V. Must not be left floating.
4	NC	unconnected	Not connected internally. Leave floating or tie to a copper pour for mechanical/thermal reasons; do not use as a signal node.
5	OUT	power_out	Regulated 3.3 V output (STLQ015M33R variant), tolerance ±2% at 25 °C, up to 150 mA. Requires a 0.47-10 µF ceramic output capacitor (1 µF typical) for stability; internal short-circuit current limit ~350 mA typ.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	SOT-23-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

STLQ015M33RM12R
STLQ015M33RM15R
STLQ015M33RM18R
STLQ015M33RM21R
STLQ015M33RM25R
STLQ015M33RM28R
STLQ015M33RM30R
STLQ015M33RM31R
STLQ015M33R

CAD (KiCad official)

Symbol: STLQ015M33R
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`stlq015m33r.step`	85 KB	You want the bare part, or you mark your own boards.
`stlq015m33r-etched.step`	2.2 MB	You want the part with `STLQ015M33R` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 531 faces against 102 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 (17 pp, sha256 0243c07b1f4516ee, 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