KP41142SGA from Kiwi Instruments, in a SOP-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	GND	power_in	IC reference ground; also serves as the source of the internal power MOSFET. Tied to pins 2 and 3 externally.
2	GND	power_in	IC reference ground; also serves as the source of the internal power MOSFET. Tied to pins 1 and 3 externally.
3	GND	power_in	IC reference ground; also serves as the source of the internal power MOSFET. Tied to pins 1 and 2 externally.
4	VDD	power_in	IC supply pin. Fed by the internal high-voltage supply block from the Drain (no auxiliary winding needed). VDD regulated at 6.4/7.1/7.8 V (min/typ/max) with Drain=12 V; UVLO on/off ~3.1/2.8 V; VDD clamp ~9 V at 5 mA. Absolute max 9 V DC, 5 mA DC clamp current.
5	Drain	power_in	Drain of the built-in 40 V power MOSFET. Connects to the secondary-side rectification node. Operating range -0.3 V to 40 V; Rds_on = 11.5 mΩ typ / 15 mΩ max (KP41142, VGS=4.5 V, ID=10 A). Tied to pins 6, 7, 8 externally.
6	Drain	power_in	Drain of the built-in 40 V power MOSFET. Tied to pins 5, 7, 8 externally.
7	Drain	power_in	Drain of the built-in 40 V power MOSFET. Tied to pins 5, 6, 8 externally.
8	Drain	power_in	Drain of the built-in 40 V power MOSFET. Tied to pins 5, 6, 7 externally.

Key specifications

Parameter	Value
Manufacturer	Kiwi Instruments
Package	SOP-8
Category	PMIC
Pins	8

Ordering variants

Same part, different packaging or reel option.

KP41142SGA

CAD (KiCad official)

Symbol: KP41142SGA
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Kiwi Instruments datasheet (6 pp, sha256 d82db6563b8a798a, 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