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LM2596R-3.3

Public Made by Adom

by adom

HTC Korea TAEJIN Tech LM2596R 3 3 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 lm2596r-3-3: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
lm2596r-3-3-etched.fit.json lm2596r-3-3: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lm2596r-3-3-etched.glb lm2596r-3-3: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray
lm2596r-3-3-etched.step lm2596r-3-3: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray
lm2596r-3-3.glb fix footprint: TO-263-2 -> TO-263-5_TabPin6 (pad_count, 5 pins) · Ray
lm2596r-3-3.kicad_mod fix footprint: TO-263-2 -> TO-263-5_TabPin6 (pad_count, 5 pins) · Ray
lm2596r-3-3.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
lm2596r-3-3.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
lm2596r-3-3.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 lm2596r-3-3: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray
README.md lm2596r-3-3: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

LM2596R-3.3

HTC Korea TAEJIN Tech · DC-DC Converters · TO-263-5

LM2596R-3.3 from HTC Korea TAEJIN Tech, 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, 4.5V to 40V operating (45V absolute max). Requires a suitable input bypass capacitor (typ. 470uF, 50V aluminum electrolytic) close to the pin to supply the switching currents and suppress voltage transients.
2 VOUT output Emitter of the internal 3A NPN switch (the switching node). Saturation voltage Vsat is typically 1.16V at Iout=3A. Connects to the external inductor and catch diode; keep the copper area small to minimize EMI coupling into sensitive circuitry.
3 GND power_in Circuit ground pin. Should tie into a solid ground plane using short, wide traces along with the input capacitor, output capacitor, and catch diode return paths.
4 FEEDBACK input Senses the regulated output voltage to close the feedback loop. In the fixed 3.3V version this pin connects directly to the regulated 3.3V output; internal R2/R1 divider sets the 3.3V regulation point against the 1.23V internal reference. Feedback bias current is typically 12nA.
5 ON/OFF input TTL-compatible shutdown input. Threshold is typically 1.3V (VIH=2.0V min, VIL=0.6V max). Driving above threshold (up to +Vin) shuts the regulator off, dropping supply current to ~80uA (250uA max). Leaving open or holding below 1.3V enables the regulator. Absolute range -0.3V to +Vin.

Key specifications

Parameter Value
Manufacturer HTC Korea TAEJIN Tech
Package TO-263-5
Category PMIC
Pins 5

Ordering variants

Same part, different packaging or reel option.

  • LM2596R-3.3
  • LM2596T-3.3

The extractor listed these alongside LM2596R-3.3, but they are different parts with different electrical characteristics. Do not order them as substitutes.

  • LM2596R-ADJ
  • LM2596T-ADJ
  • LM2596DP-ADJ

CAD (KiCad official)

  • Symbol: LM2596R-3.3
  • Footprint: Package_TO_SOT_SMD:TO-263-2
  • 3D model: TO-263-5 (KiCad packages3D, STEP)
  • 3D model files: lm2596r-3-3-etched.step / lm2596r-3-3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm2596r-3-3.step / lm2596r-3-3.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
lm2596r-3-3.step 180 KB You want the bare part, or you mark your own boards.
lm2596r-3-3-etched.step 2.2 MB You want the part with LM2596R-3.3 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 574 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: HTC Korea TAEJIN Tech datasheet (8 pp, sha256 c89f43dda8481acd, 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