component

LM2576R-ADJ

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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3D Model

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Symbol & Footprint

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PCB Footprint

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Contents

README

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LM2576R-ADJ

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

LM2576R-ADJ 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. Absolute maximum 45V; operating up to 40V. Requires a bypass capacitor (Cin) close to the pin to minimize voltage transients and supply the switching currents.
2 VOUT output Emitter of the internal switching transistor (switch node). Saturation voltage V_SAT typically 1.5V (max 2V) at 3.0A. Connects to the external catch diode and inductor; PCB copper area on this pin should be kept small to minimize coupling to sensitive circuitry.
3 GND power_in Circuit ground pin. Return for input bypass, output filter, and internal control circuitry. Also serves as the thermal return path via the TO-263 tab.
4 FEEDBACK input Feedback sense input to the internal error amplifier. On the adjustable version this is the direct amplifier input; connect an external R1/R2 divider to program Vout via Vout = Vref(1 + R2/R1), Vref = 1.23V (R1 typically 1.0k-5.0k). Feedback bias current typically 25nA (max 200nA over temperature).
5 ON/OFF input TTL-compatible shutdown input. Threshold typically 1.4V: pulling above the threshold (up to +Vin) shuts the regulator off (drops supply current to ~80µA); low or open enables normal operation. Input voltage 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-ADJ

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

  • LM2576T-ADJ
  • LM2576DP-ADJ

CAD (KiCad official)

  • Symbol: LM2576R-ADJ
  • 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-adj.step 180 KB You want the bare part, or you mark your own boards.
lm2576r-adj-etched.step 1.9 MB You want the part with LM2576R-ADJ already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 514 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