LM2594M-ADJ from UMW, in a SOP-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	NC	unconnected	No internal connection. Leave floating or tie to a copper island for mechanical support only.
2	NC	unconnected	No internal connection. Leave floating or tie to a copper island for mechanical support only.
3	NC	unconnected	No internal connection. Leave floating or tie to a copper island for mechanical support only.
4	Feedback	input	Feedback (FB) input for the internal error amplifier. Connect to the midpoint of an external resistor divider from the regulated output to GND. The internal feedback threshold is 1.23 V typical, so VOUT = 1.23 V x (1 + R2/R1).
5	ON/OFF	input	Active-low enable input with hysteresis (VIH >= 1.4 V disables, VIL <= 0.8 V enables). Drive low to turn the regulator on and high to place it in shutdown (ISTBY ~ 80 uA). Floating defaults low (regulator ON); absolute max is 25 V.
6	GND	power_in	Device ground reference and return for internal circuitry. Route outside the catch (Schottky) diode and output capacitor return path to prevent switching-current spikes from injecting noise into the IC.
7	VIN	power_in	Supply voltage input. Operates from 4.5 V to 40 V (standard) or 4.5 V to 60 V (HV version); absolute max 45 V / 63 V (HV). Bypass VIN to GND with a suitably large low-ESR capacitor placed as close to the pin as possible to eliminate input noise.
8	Output	output	Power switch (SW) output node. Internal NPN power transistor connects VIN to this pin during the on-time. Connect to the inductor / catch-diode junction of the buck power stage; delivers up to 1.5 A continuous with 1.2 V typ. saturation voltage.

Key specifications

Parameter	Value
Manufacturer	UMW
Package	SOP-8
Category	PMIC
Pins	8

Ordering variants

Same part, different packaging or reel option.

LM2594M-ADJ

CAD (KiCad official)

Symbol: LM2594M-ADJ
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lm2594m-adj.step`	122 KB	You want the bare part, or you mark your own boards.
`lm2594m-adj-etched.step`	1.9 MB	You want the part with `LM2594M-ADJ` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 482 faces against 147 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 (17 pp, sha256 b4935ffaa609c227, 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