AP7311-18WG-7 from Diodes Incorporated, in a SOT-25. 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	IN	power_in	Voltage input pin (2V to 6V, 7V absolute max). Bypass to ground through at least 1uF capacitor.
2	GND	power_in	Ground reference pin.
3	EN	input	Enable input, active high. VIH = 1.4V min, VIL = 0.4V max. Referenced to VIN (max VIN + 0.3V).
4	NC	unconnected	No connection. This pin is unused on the fixed-output variant (AP7311-18WG-7 is a fixed 1.8V output part).
5	OUT	power_out	Regulated voltage output pin, fixed 1.8V, 150mA max. Bypass to ground through 1uF ceramic capacitor.

Key specifications

Parameter	Value
Manufacturer	Diodes Incorporated
Package	SOT-25
Category	PMIC
Pins	5

Ordering variants

AP7311-18WG-7
AP7311-18WG-7AP7311-WG-7

CAD (KiCad official)

Symbol: AP7311-18WG-7
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-25 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ap7311-18wg-7.step`	85 KB	You want the bare part, or you mark your own boards.
`ap7311-18wg-7-etched.step`	1.9 MB	You want the part with `AP7311-18WG-7` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 482 faces against 102 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: Diodes Incorporated datasheet (13 pp, sha256 6bf469c670222d24, 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