LDLN025M30R from STMicroelectronics, in a SOT-23-5L. 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	VIN	power_in	LDO supply voltage input. Operating range 1.5 V to 5.5 V; absolute max -0.3 V to 7 V. Requires a 1 µF ceramic input capacitor to GND.
2	GND	power_in	Ground reference for the regulator.
3	EN	input	Enable input. Drive high (VEN = high) to turn the device on, low to place it in shutdown (<1 µA). Internally pulled down via a 1 MΩ resistor. Absolute max -0.3 V to VIN + 0.3 V.
4	NC	unconnected	Not internally connected. May be left floating or tied to GND.
5	VOUT	power_out	Regulated LDO output. Fixed 3.0 V (part suffix '30'), up to 250 mA. Requires a 1 µF ceramic output capacitor to GND for stability. Typical dropout 120 mV at 250 mA.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

LDLN025M30RM
LDLN025M30RQ

CAD (KiCad official)

Symbol: LDLN025M30R
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5L (KiCad packages3D, STEP)

Provenance

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

Datasheet: STMicroelectronics datasheet (27 pp, sha256 b71eeee4c541f04a, 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