SGM2037-3.3XN5G from SGMICRO, 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	Input voltage supply pin. Operating range 0.8V to 5.5V; must be at least VOUT(NOM)+VDROP_IN. Recommended input effective capacitance CIN >= 0.5 uF (1 uF typical).
2	GND	power_in	Device ground reference. Return path for input, bias, and output currents.
3	BIAS	power_in	Bias voltage supply for the internal control circuits. Operating range 2.5V to 5.5V and must satisfy (VOUT(NOM)+1.4) >= 2.5V. Monitored by the internal UVLO (VUVLO ~1.6V rising). Recommended bias effective capacitance CBIAS >= 0.1 uF.
4	EN	input	Active-high enable input. Drive EN high (VIH >= 1.2V) to turn on the regulator; drive low (VIL <= 0.25V) to disable. An internal pull-down (~580 kOhm) ensures the device is off when EN is floated.
5	OUT	power_out	Regulated 3.3V output pin (SGM2037-3.3 fixed variant). Delivers up to 500mA nominal with 120mV typical dropout at 500mA. Requires an output capacitor with effective capacitance of 1 uF to 10 uF (2.2 uF typical). Automatic discharge (~120 Ohm) pulls OUT down when EN=0.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

SGM2037-3.3XN5G/TR
SGM2037-3.3XN5GADJXN6G/TR
SGM2037-3.3XN5GXUDX6G/TR
SGM2037-3.3XN5GADJXUDX6G/TR

CAD (KiCad official)

Symbol: SGM2037-3.3XN5G
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

Provenance

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

Datasheet: SGMICRO datasheet (18 pp, sha256 2a5238ec70146888, 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