NUD4001DR2G from onsemi, in a SOIC-8. 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	Positive input voltage to the device. Continuous rating 30 V, non-repetitive peak 60 V (t <= 1 ms). Supplies the internal current-source control circuit and the LED string via the external Rext.
2	Boost	output	Optional boost pin used to drive an external transistor for higher current or PWM operation, as described in ON Semi App Note AND8198/D. Left unconnected in the basic LED-driver configuration (the package soldering-footprint sheet labels this pin as N/C).
3	Rext	passive	External current-set resistor pin. A resistor connected between Rext and Vin programs the LED drive current (Iout = Vsense / Rext, e.g. Rext = 2.0 ohm gives ~325 mA at 12 V in). See Figure 1 for Rext vs Iout.
4	GND	power_in	Device ground reference for the internal current-source control circuitry.
5	Iout	output	Regulated LED current output. Cathode(s) of the driven LED string connect from this pin to ground. Rated up to 500 mA (with Vdrop <= 2.2 V); Vout max 28 V. Pins 5-8 are tied internally to the same current-source output and are typically paralleled.
6	Iout	output	Regulated LED current output (internally common with pins 5, 7, 8). Connect LED cathode(s) from this pin to ground. Parallel pins 5-8 to spread current and improve thermal performance.
7	Iout	output	Regulated LED current output (internally common with pins 5, 6, 8). Connect LED cathode(s) from this pin to ground.
8	Iout	output	Regulated LED current output (internally common with pins 5, 6, 7). Connect LED cathode(s) from this pin to ground.

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	SOIC-8
Category	LED-drv
Pins	8

Ordering variants

Same part, different packaging or reel option.

NUD4001DR2G
NUD4001DR2GNSVD4001DR2G

CAD (KiCad official)

Symbol: NUD4001DR2G
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

Provenance

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

Datasheet: onsemi datasheet (8 pp, sha256 385fc571e81f6ce3, 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