LM2596S-5.0 from HGSEMI, 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	Unregulated DC input supply. Operating range 4.75V to 40V (LM2596) / 4.75V to 60V (LM2596HV); absolute max 45V / 63V. Bypass close to pin with a low-ESR input capacitor (typ. 680 uF).
2	Output	output	Switching output node of the internal power switch. Connects to the external catch diode (e.g. 1N5824 Schottky) cathode and to the output inductor (typ. 33 uH). Rated 3A continuous load current; do not exceed -1V below ground in steady state.
3	GND	power_in	Device ground reference. Tie directly to the system ground plane; carries return current for both control and power stages.
4	Feedback	input	Output voltage feedback sense pin. For the fixed 5.0V version this pin ties directly to the regulated output; internal divider sets Vout = 5V. Absolute max -0.3V to +25V.
5	ON/OFF	input	Active-low TTL-compatible shutdown. Regulator is enabled when this pin is Low or left floating; pulled High (up to +25V) forces low-power standby (IQ ~ 80 uA typ.). Absolute max -0.3V to +25V.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

LM2596S-5.0
LM2596HVS-5.0
LM2596T-5.0
LM2596HVT-5.0

CAD (KiCad official)

Symbol: LM2596S-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
`lm2596s-5-0.step`	180 KB	You want the bare part, or you mark your own boards.
`lm2596s-5-0-etched.step`	2.2 MB	You want the part with `LM2596S-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: 573 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: HGSEMI datasheet (28 pp, sha256 26d031e9696524e9, 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