AP7331-20WG-7 from Diodes Incorporated, in a SOT-25-5. 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. Operating range 2V to 6V (absolute max 7V). Bypass to ground with at least a 1uF ceramic capacitor.
2	GND	power_in	Device ground reference return.
3	EN	input	Enable input, active high. VIH >= 1.4V enables the regulator; VIL <= 0.4V shuts it down (IQ drops to ~1uA). Absolute max VIN+0.3V. Do not leave floating.
4	NC	unconnected	No internal connection. Leave floating or tie to GND.
5	OUT	power_out	Regulated voltage output pin. Fixed 2.0V nominal, +/-2% accuracy, up to 300mA. Requires >=1uF ceramic bypass capacitor to GND for stability (stable with low-ESR ceramic).

Key specifications

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

Ordering variants

AP7331-20WG-7W
AP7331-20WG-7
AP7331-20WG-7ADJ-W
AP7331-20WG-7FDC
AP7331-20WG-7FDC-7
AP7331-20WG-7ADJ-DFN

CAD (KiCad official)

Symbol: AP7331-20WG-7
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-25-5 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Diodes Incorporated datasheet (13 pp, sha256 9fdedb2b73161d34, retrieved 2026-08-17, tier: lcsc)
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