LM2576R-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 LM2576 step-down switching regulator. Operating range 8V-40V for the 5.0V version; absolute maximum 45V. Requires an input bypass capacitor (Cin) to minimize voltage transients and supply switching currents.
2	VOUT	output	Emitter of the internal switching transistor. Delivers up to 3.0A switched output; typical switch saturation voltage VSAT ≈ 1.5V. PCB copper area on this node should be minimized to reduce coupling to sensitive circuitry.
3	GND	power_in	Circuit ground pin. Return for the internal control circuitry and reference. Layout should provide a low-impedance return path (see application PCB layout guidance).
4	FEEDBACK	input	Senses the regulated output voltage to close the control loop. Internally divided (R2/R1) and applied to the internal error amplifier; nominal regulation to 5.0V ±4% on the fixed 5.0V version.
5	ON/OFF	input	TTL-level shutdown input. Threshold typically 1.4V: voltage above this (up to +Vin) shuts the regulator off, dropping supply current to ~80µA; below 1.4V or left open, the regulator is on. Allowed range -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-5.0
LM2576T-5.0
LM2576DP-5.0

CAD (KiCad official)

Symbol: LM2576R-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
`lm2576r-5-0.step`	180 KB	You want the bare part, or you mark your own boards.
`lm2576r-5-0-etched.step`	2.0 MB	You want the part with `LM2576R-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: 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 (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