AP2127K-ADJTRG1 from Diodes Incorporated, in a SOT-23-5. 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	VIN	power_in	Power input. Recommended operating range 2.5V to 6V (absolute max 6.5V). Bypass to GND with a 1µF low-ESR ceramic capacitor close to the pin.
2	GND	power_in	Device ground reference. Provides the return path for the regulator and the reference/feedback network.
3	Shutdown	input	Active-low enable / shutdown input. Drive above V_SHUTDOWN(H) = 1.5V (min) to enable the regulator; drive below V_SHUTDOWN(L) = 0.5V (max) to disable. In shutdown, standby current drops to ~0.1µA and V_OUT is discharged through a ~60Ω MOSFET. Internal pull-down is ~3MΩ.
4	ADJ	input	Adjustable output feedback input. Connect the tap of an external resistor divider from VOUT to GND; V_OUT = 0.8V × (1 + R1/R2). Internal reference V_REF = 0.8V (0.784-0.816V). On fixed-voltage variants this pin is NC.
5	VOUT	power_out	Regulated power output. Adjustable 0.8V to 5.5V, 300mA typical (400mA typ current limit, ~50mA short-circuit limit). Requires a 1µF low-ESR ceramic output capacitor for stability.

Key specifications

Parameter	Value
Manufacturer	Diodes Incorporated
Package	SOT-23-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

AP2127K-ADJTRG1

CAD (KiCad official)

Symbol: AP2127K-ADJTRG1
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ap2127k-adjtrg1.step`	85 KB	You want the bare part, or you mark your own boards.
`ap2127k-adjtrg1-etched.step`	2.1 MB	You want the part with `AP2127K-ADJTRG1` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 537 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 (24 pp, sha256 d48c96ac985d348a, 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