DP4111 from Shenzhen Developer Microelec, 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 and source of the internal power MOSFET. Pins 1, 2, 3 are tied together internally.
2	GND	power_in	IC reference ground and source of the internal power MOSFET. Pins 1, 2, 3 are tied together internally.
3	GND	power_in	IC reference ground and source of the internal power MOSFET. Pins 1, 2, 3 are tied together internally.
4	VDD	power_in	IC supply pin. Internally regulated to ~7.1 V via a high-voltage LDO from the Drain pin (no auxiliary winding required). UVLO thresholds: VDD_ON=4.0 V typ, VDD_OFF=3.1 V typ; clamped at 7.4 V typ (5 mA). Recommended decoupling: ≥0.1 µF ceramic.
5	Drain	power_in	Drain of the internal synchronous-rectifier power MOSFET (BVDSS = 45 V, Rds_on ≈ 10 mΩ for DP4111). Pins 5, 6, 7, 8 are tied together internally for current handling.
6	Drain	power_in	Drain of the internal synchronous-rectifier power MOSFET (BVDSS = 45 V, Rds_on ≈ 10 mΩ for DP4111). Pins 5, 6, 7, 8 are tied together internally.
7	Drain	power_in	Drain of the internal synchronous-rectifier power MOSFET (BVDSS = 45 V, Rds_on ≈ 10 mΩ for DP4111). Pins 5, 6, 7, 8 are tied together internally.
8	Drain	power_in	Drain of the internal synchronous-rectifier power MOSFET (BVDSS = 45 V, Rds_on ≈ 10 mΩ for DP4111). Pins 5, 6, 7, 8 are tied together internally.

Key specifications

Parameter	Value
Manufacturer	Shenzhen Developer Microelec
Package	SOP-8
Category	PMIC
Pins	8

Ordering variants

Same part, different packaging or reel option.

DP4111

CAD (KiCad official)

Symbol: DP4111
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`dp4111.step`	122 KB	You want the bare part, or you mark your own boards.
`dp4111-etched.step`	1.1 MB	You want the part with `DP4111` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 306 faces against 147 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: Shenzhen Developer Microelec datasheet (9 pp, sha256 8aaccc46363990e6, 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