LN2115B025MR-G from NATLINEAR, in a SOT-23-6L. 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	LX	output	Internal power NMOS switch drain; connect to the boost inductor and Schottky diode. Rated up to 29 V with respect to VSS; typical on-resistance 1.5 Ohm; peak switch current limit ~800 mA (VIN=3.6 V).
2	GND	power_in	Device ground (VSS) reference return for all internal circuitry.
3	FB	input	Voltage feedback input to the internal error amplifier. Regulated to a 0.25 V (0.24-0.26 V) reference; LED current is set by ILED = 0.25 V / RLED where RLED sits between the LED cathode string and GND.
4	CE	input	Chip enable / PWM dimming input. Logic high (VCEH >= 1 V) enables the converter at full brightness; logic low (VCEL <= 0.6 V) puts the part in standby (<= 1 uA). Applying a PWM signal (up to 100 kHz) sets the effective FB reference as VFB = Duty x 250 mV for dimming down to ~5%.
5	OVP	input	Overvoltage protection sense input; connect to VOUT. Trips at typically 22.5 V (20-25 V) to shut down switching and protect the LX node/output cap; absolute maximum 29 V.
6	VIN	power_in	Supply input. Operating range 2.5 V to 6 V (absolute max 7 V). Bypass locally with a 1 uF ceramic capacitor close to the pin.

Key specifications

Parameter	Value
Manufacturer	NATLINEAR
Package	SOT-23-6L
Category	LED-drv
Pins	6

Ordering variants

Same part, different packaging or reel option.

LN2115B025MR-G
LN2115B025ML-G

CAD (KiCad official)

Symbol: LN2115B025MR-G
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6L (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ln2115b025mr-g.step`	97 KB	You want the bare part, or you mark your own boards.
`ln2115b025mr-g-etched.step`	2.4 MB	You want the part with `LN2115B025MR-G` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 605 faces against 117 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: NATLINEAR datasheet (6 pp, sha256 c5f54232e530755b, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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