component

LM2596S-12

Public Made by Adom

by adom

UMW DC-DC Converters, TO-263-5. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs lm2596s-12: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STE… · Ray
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
lm2596s-12-etched.fit.json lm2596s-12: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lm2596s-12-etched.glb lm2596s-12: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STE… · Ray
lm2596s-12-etched.step lm2596s-12: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STE… · Ray
lm2596s-12.glb fix footprint: TO-263-2 -> TO-263-5_TabPin6 (pad_count, 5 pins) · Ray
lm2596s-12.kicad_mod fix footprint: TO-263-2 -> TO-263-5_TabPin6 (pad_count, 5 pins) · Ray
lm2596s-12.kicad_sym add symbol pin "6" for the exposed thermal pad: the footprint carries the pad and the symbol had none, so it reached no… · Ray
lm2596s-12.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray
lm2596s-12.step fix footprint: TO-263-2 -> TO-263-5_TabPin6 (pad_count, 5 pins) · Ray
package.json Publish 0.2.0 · Ray
pads.json add symbol pin "6" for the exposed thermal pad: the footprint carries the pad and the symbol had none, so it reached no… · Ray
page.json lm2596s-12: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STE… · Ray
README.md lm2596s-12: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

LM2596S-12

UMW · DC-DC Converters · TO-263-5

LM2596S-12 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 Input supply voltage. Accepts unregulated DC input; operating range 4.75V to 40V (63V absolute max for HV variant). Bypass with a low-ESR bulk capacitor (typ. 680 uF) placed close to the pin.
2 Output output Switching output of the internal power switch. Connects to the external catch diode (e.g., 1N5822/1N5824 Schottky), inductor (typ. 33 uH for 12V out), and output filter capacitor. Delivers up to 3A load current; saturation voltage typ. 1.16V at 3A.
3 GND power_in Ground reference for the regulator. Also serves as the thermal path in the TO-263 (D2PAK) surface-mount package; connect to a copper ground plane for heat dissipation.
4 Feedback input Output voltage feedback sense pin. For the fixed 12V variant, connect directly to the regulated output node. Internal reference sets Vout = 12V (min 11.40V, max 12.60V over temperature). Absolute maximum -0.3V to +25V.
5 ON/OFF input TTL-compatible shutdown control. Active low: drive low or leave floating for normal operation; drive high (>~2.2V, up to 25V max) to enter standby mode (IQ typ. 80 uA). Internal pull-down keeps the device enabled when unconnected.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • LM2596S-12
  • LM2596HVS-12
  • LM2596T-12
  • LM2596HVT-12

CAD (KiCad official)

  • Symbol: LM2596S-12
  • Footprint: Package_TO_SOT_SMD:TO-263-5_TabPin6
  • 3D model: TO-263-5 (KiCad packages3D, STEP)
  • 3D model files: lm2596s-12-etched.step / lm2596s-12-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm2596s-12.step / lm2596s-12.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
lm2596s-12.step 180 KB You want the bare part, or you mark your own boards.
lm2596s-12-etched.step 2.1 MB You want the part with LM2596S-12 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 538 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 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