component

LM2576R-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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LM2576R-12

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

LM2576R-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 switching regulator. Operating supply range up to 40V (45V absolute maximum). For the 12V fixed version, minimum recommended Vin is 15V. Requires a suitable input bypass capacitor (Cin) close to the pin to minimize voltage transients and supply switching currents.
2 VOUT output Emitter of the internal switching transistor (switch node). Saturation voltage V_SAT is typically 1.5V; drives the external catch diode and inductor of the buck converter. PCB copper area connected to this pin should be minimized to reduce EMI coupling to sensitive circuitry.
3 GND power_in Circuit ground pin. Return for the internal control circuitry and switching current. Requires proper PCB layout for a stable ground reference (single-point star ground recommended for the power and signal returns).
4 FEEDBACK input Senses the regulated output voltage to close the feedback loop. In the fixed 12V version this pin connects directly to the output rail; the internal R2/R1 divider applies the divided signal to the non-inverting input of the internal error amplifier (internal reference is 1.235V band-gap).
5 ON/OFF input TTL-compatible shutdown input. Threshold is typically 1.4V: driving above the threshold (up to +Vin) puts the regulator in low-power standby (~80µA typ). Voltages below 1.4V or leaving the pin open enable the regulator (ON). Absolute limits: -0.3V ≤ V ≤ +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.

  • LM2576R-12
  • LM2576R-12T-12
  • LM2576R-12DP-12

The extractor listed these alongside LM2576R-12, but they are different parts with different electrical characteristics. Do not order them as substitutes.

  • LM2576R-12R-3.3
  • LM2576R-12R-5.0
  • LM2576R-12R-ADJ
  • LM2576R-12T-3.3
  • LM2576R-12T-5.0
  • LM2576R-12T-ADJ
  • LM2576R-12DP-3.3
  • LM2576R-12DP-5.0
  • LM2576R-12DP-ADJ

CAD (KiCad official)

  • Symbol: LM2576R-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
lm2576r-12.step 180 KB You want the bare part, or you mark your own boards.
lm2576r-12-etched.step 1.8 MB You want the part with LM2576R-12 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 490 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 (11 pp, sha256 2acb3c8a94295de6, 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