AP2125N-1.8TRG1 from Diodes Incorporated AP2125N 1 8TRG1, in a SOT-23. 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	Input voltage supply pin. Absolute maximum 6.5V; recommended operating range VOUT+0.5V to 6V. Bypass to GND with a 1μF ceramic capacitor close to the pin.
2	GND	power_in	Device ground return. Serves as the reference for VIN, VOUT, and the CE logic input.
3	CE	input	Active-high chip enable input. Logic high (≥1.5V) enables the regulator; logic low (≤0.4V) puts the device into shutdown, dropping standby current to 0.01μA typical. Do not leave floating.
4	NC	unconnected	No internal connection. May be left floating or tied to GND for mechanical support.
5	VOUT	power_out	Regulated output voltage pin, fixed at 1.8V ±2% for this variant. Sources up to 300mA (min); requires a 1μF (or larger) low-ESR ceramic output capacitor for stability.

Key specifications

Parameter	Value
Manufacturer	Diodes Incorporated AP2125N 1 8TRG1
Package	SOT-23
Category	PMIC
Pins	5

Ordering variants

AP2125N-1.8TRG1N
AP2125N-1.8TRG1W

CAD (KiCad official)

Symbol: AP2125N-1.8TRG1
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Diodes Incorporated AP2125N 1 8TRG1 datasheet (25 pp, sha256 73dd4f47f543db12, 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