component

LM2596R-5.0

Public Unreviewed

by Ray

HTC Korea TAEJIN Tech LM2596R 5 0 DC-DC Converters, TO-263-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpmiclm2596r-5.0
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3D Model

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Symbol & Footprint

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PCB Footprint

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Contents

README

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LM2596R-5.0

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

LM2596R-5.0 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 for the LM2596 step-down switching regulator. Absolute max 45V, recommended operating up to 40V. Requires a suitable input bypass capacitor (e.g. 470uF, 50V aluminum electrolytic) placed close to the pin to minimize voltage transients and supply the switching currents.
2 VOUT output Emitter of the internal NPN power switch; connects to the external inductor and catch diode of the buck converter. Saturation voltage Vsat is typically 1.16V at 3.0A. PCB area on this node should be kept small to minimize coupling to sensitive circuitry.
3 GND power_in Circuit ground pin. Use ground plane construction or single-point grounding for best regulation and noise performance.
4 FEEDBACK input Senses the regulated output voltage to close the feedback loop. On the fixed 5.0V version this pin ties directly to Vout; the internal resistor divider sets the 5.0V regulation point (Vref = 1.23V internal reference). Feedback bias current is typically 12 nA.
5 ON/OFF input Active-high shutdown input. Threshold is typically 1.3V; VIH >= 2.0V shuts the regulator OFF (dropping IQ to ~80uA typ, 200uA max), VIL <= 0.6V or floating leaves the regulator ON. Absolute input range is -0.3V to +VIN. Input current is ~5uA at 2.5V (OFF), ~0.02uA at 0.5V (ON).

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-5.0
  • LM2596T-5.0

The extractor listed these alongside LM2596R-5.0, 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-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
lm2596r-5-0.step 180 KB You want the bare part, or you mark your own boards.
lm2596r-5-0-etched.step 2.1 MB You want the part with LM2596R-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: 564 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