component

LM2596R-12

Public Unreviewed

by Ray

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

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Contents

README

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LM2596R-12

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

LM2596R-12 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 step-down regulator. Absolute max 45V, operating up to 40V. Requires a suitable input bypass capacitor (typ. 470uF/50V aluminum electrolytic) to minimize voltage transients and supply the switching currents.
2 VOUT output Emitter of the internal 3A NPN switch; connects to the external inductor and catch-diode cathode of the buck power stage. Typical saturation voltage Vsat ~1.16V at 3A. PCB area on this node should be minimized to reduce coupling to sensitive circuitry.
3 GND power_in Circuit ground return for the regulator. Should tie to the ground plane via a short, low-inductance path close to the input and output capacitor grounds.
4 FEEDBACK input Senses the regulated output voltage to close the control loop. In the fixed 12V version, an internal resistor divider (R2, R1) scales VOUT to the internal 1.23V reference at the error amplifier non-inverting input. Connect this pin directly to the regulated 12V output node. Feedback bias current is typically 12nA.
5 ON/OFF input TTL-compatible active-high shutdown input. Threshold ~1.3V typ; VIH >= 2.0V forces the regulator OFF (standby quiescent current typ 80uA), VIL <= 0.6V or left open keeps the regulator ON. Input voltage must be within -0.3V to +Vin. Tie to GND for always-on operation.

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-12
  • LM2596T-12
  • LM2596DP-12

The extractor listed these alongside LM2596R-12, but they are different parts with different electrical characteristics. Do not order them as substitutes.

  • LM2596R-ADJ
  • LM2596R-3.3
  • LM2596R-5.0
  • LM2596T-ADJ
  • LM2596T-3.3
  • LM2596T-5.0
  • LM2596DP-ADJ
  • LM2596DP-3.3
  • LM2596DP-5.0

CAD (KiCad official)

  • Symbol: LM2596R-12
  • 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-12.step 180 KB You want the bare part, or you mark your own boards.
lm2596r-12-etched.step 2.0 MB You want the part with LM2596R-12 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 527 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