AP1501-K5G-13 from Diodes Incorporated, in a TO-263-5. 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	Operating voltage input. Accepts supply up to 40 V (absolute max VCC = +45 V). Bypass to GND with an input capacitor close to the pin.
2	Output	output	Switching output from the internal 3 A NPN switch. Connect to the external inductor / catch diode node of the buck power stage. Saturation voltage typically 1.3 V at IOUT = 3 A.
3	Gnd	power_in	Device ground. The metal tab of the TO263-5L package is internally tied to Gnd and should be soldered to a ground copper pour for thermal dissipation (θJA ≈ 37 °C/W for TO263-5).
4	FB	input	Output voltage feedback control input. Internal reference VFB = 1.23 V; for the adjustable version set VOUT = VFB × (1 + R1/R2) with R2 = 1 k-3 k. Feedback bias current typically 40 nA (max 100 nA over temperature).
5	SD	input	ON/OFF shutdown logic input. VIL ≤ 0.6 V keeps the regulator ON; VIH ≥ 2.0 V forces the regulator OFF (standby). Absolute max input range −0.3 V to +40 V. Can be paired with an external RC (e.g. 0.1 µF + 10 k) for a delay-start.

Key specifications

Parameter	Value
Manufacturer	Diodes Incorporated
Package	TO-263-5
Category	PMIC
Pins	5

Ordering variants

AP1501-K5G-13
AP1501-K5G-1350K5G-13
AP1501-K5G-1312K5G-13
AP1501-K5G-1333K5G-13
AP1501-K5G-13T5G
AP1501-K5G-13T5RG

CAD (KiCad official)

Symbol: AP1501-K5G-13
Footprint: Package_TO_SOT_SMD:TO-263-5_TabPin6
3D model: TO-263-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ap1501-k5g-13.step`	180 KB	You want the bare part, or you mark your own boards.
`ap1501-k5g-13-etched.step`	2.1 MB	You want the part with `AP1501-K5G-13` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 569 faces against 135 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 bafb5b2d2810633a, 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