AP1501-5.0 from UMW, 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	Positive input supply for the IC switching regulator, 4.5V to 40V operating (45V absolute max). A suitable input bypass capacitor must be present at this pin to minimize voltage transients and to supply switching currents.
2	Output	output	Internal switch node. Voltage at this pin switches between (+VIN - VSAT) and approximately -0.5V, with a duty cycle of approximately VOUT/VIN. Connects to the external catch diode and inductor. PCB copper area on this node should be kept to a minimum to reduce coupling to sensitive circuitry.
3	GND	power_in	Circuit ground reference for the regulator.
4	Feedback	input	Output voltage feedback input. Senses the regulated output voltage to complete the feedback loop. For fixed-output versions (like AP1501-5.0) it connects directly to VOUT. Absolute max -0.3V to +40V; typical bias current 10nA.
5	ON/OFF	input	Logic-level shutdown input, active-high (regulator OFF when pulled above ~1.3V, up to 25V max applied; ON when pulled below threshold or left floating). Pulling low drops input supply current to ~80µA standby. Absolute max -0.3V to +40V. If unused, may be tied to GND or left open - regulator remains ON.

Key specifications

Parameter	Value
Manufacturer	UMW
Package	TO-263-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

AP1501-5.0

CAD (KiCad official)

Symbol: AP1501-5.0
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
`ap1501-5-0.step`	180 KB	You want the bare part, or you mark your own boards.
`ap1501-5-0-etched.step`	1.8 MB	You want the part with `AP1501-5.0` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 488 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: UMW datasheet (28 pp, sha256 d716270a9a304615, 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