LM2596ME-5.0 from HGSEMI, 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 DC input supply. Operating range 4.5V-40V (60V for HV variants). Bypass to GND with a large low-ESR capacitor placed close to the pin to suppress input ripple/noise.
2	OUTPUT	power_out	Internal power switch (emitter) output node. Connects to the external inductor / catch diode of the buck converter and swings between VIN and one diode-drop below ground at 150kHz.
3	GND	power_in	Circuit ground reference. Route the return path from the catch-diode/output-capacitor back to this pin with a short, low-inductance trace to avoid switching-noise pickup.
4	FEEDBACK	input	Regulator feedback sense input. Internal reference is 1.23V; on fixed-output versions such as the -5.0 the divider is integrated so this pin is tied directly to the output rail through an internal network.
5	ON_OFF	input	Active-low enable input. Logic-low (<0.8V) or floating enables the regulator; logic-high (>1.4V, up to VIN) shuts the part down. Standby current ~80uA when disabled.
6	NC	unconnected	No internal connection on SOP-8/ESOP-8 package. May be left floating or tied to GND.
7	NC	unconnected	No internal connection on SOP-8/ESOP-8 package. May be left floating or tied to GND.
8	NC	unconnected	No internal connection on SOP-8/ESOP-8 package. May be left floating or tied to GND.

Key specifications

Parameter	Value
Manufacturer	HGSEMI
Package	ESOP-8
Category	PMIC
Pins	8

Ordering variants

Same part, different packaging or reel option.

LM2596ME-5.0/TR
LM2596M-5.0/TR
LM2596DQ4-5.0/TR
LM2596T-5.0
LM2596HVT-5.0
LM2596S-5.0/TR
LM2596HVS-5.0/TR
LM2596MD5T-5.0/TR
LM2596MDT-5.0/TR
LM2596TB-5.0
LM2596HVTB-5.0

CAD (KiCad official)

Symbol: LM2596ME-5.0
Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm
3D model: ESOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lm2596me-5-0.step`	193 KB	You want the bare part, or you mark your own boards.
`lm2596me-5-0-etched.step`	1.9 MB	You want the part with `LM2596ME-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: 487 faces against 63 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: HGSEMI datasheet (17 pp, sha256 986b3081cc1a4676, 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