AP2303MPTR-G1 from Diodes Incorporated, in a ESOP-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	VIN	power_in	Unregulated power input supply (1.2 V to 5.5 V operating). A small 10 µF MLCC should be connected from this pin to GND. Absolute max -0.3 to 6 V.
2	GND	power_in	Device ground return.
3	VREFEN	input	Reference voltage input and active-low shutdown control (0.6 V to VCNTL-2.2 V operating; typical 0.9/0.75/0.675/0.6 V). Pulling below ~0.15 V shuts the device off; releasing initiates a ~0.1 ms soft-start. Output VTT tracks VREFEN within ±10 mV.
4	VOUT	power_out	Regulated termination voltage output; sources and sinks up to ±1.75 A. Requires a minimum 10 µF ceramic capacitor to ground for stability.
5	NC	unconnected	No connection.
6	VCNTL	power_in	Control input supply for the internal control circuitry and pass-device drive (3.0 V to 5.5 V operating; typical 3.3 V or 5 V). Must be kept ≥ VIN during power-on/off sequences. Draws ~0.5 mA typical, ~30 µA in shutdown.
7	NC	unconnected	No connection.
8	NC	unconnected	No connection.
9	EP	passive	Exposed thermal pad (PSOP-8 only). Should be connected to the ground copper pour for improved heat dissipation.

Key specifications

Parameter	Value
Manufacturer	Diodes Incorporated
Package	ESOP-8
Category	PMIC
Pins	9

Ordering variants

Same part, different packaging or reel option.

AP2303MPTR-G1MTR-G1
AP2303MPTR-G1

CAD (KiCad official)

Symbol: AP2303MPTR-G1
Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm
3D model: ESOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ap2303mptr-g1.step`	125 KB	You want the bare part, or you mark your own boards.
`ap2303mptr-g1-etched.step`	2.6 MB	You want the part with `AP2303MPTR-G1` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 637 faces against 152 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 (16 pp, sha256 e465b64782ac605a, 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